DVDO iScanPlus V2 User's Manual
Contents
1. FCC Regulations state that any unauthorized changes or modifications to this equipment not expressly approved by the manufacturer could void the user s authority to operate this equipment Only operate your iScan Plus v2 using the included external power supply Use of other supplies could impair performance or damage your iScan Plus v2 or could cause fires As a safety feature the included external power supply is equipped a 3 wire grounded plug a third pin for grounding The 3 wire grounded plug will fit only into a grounding type outlet Protect and route power cords so they will not be stepped on or pinched by anything placed on or against them Be especially careful at plug ins or cord exit points from the iScan Plus v2 Do not cover or block ventilation holes in the iScan Plus v2 cabinet Doing so may damage the unit or cause improper operation Avoid excessive humidity sudden temperature changes or temperature extremes Keep your iScan Plus v2 away from wet locations such as bathtubs sinks laundries wet basements and swimming pools Use only accessories recommended by the manufacturer to avoid fire shock or other hazards Unplug your iScan Plus v2 before cleaning Use a damp cloth for cleaning Do not use cleaning fluids or aerosols which could enter the unit and cause damage fire or electrical shock These substances may also mar the finish of your iScan Plus v2 Never open or remove covers or make any ad2. Silicon Image Inc 1060 E Arques Avenue Sunnyvale CA 94085 408 616 4000 E mail iscan siimaae cam OScan Plus V2 User Manual Rev 2 3 August 2000
3. The standard video signal in North America officially referred to as the NTSC standard consists of approximately 240 visible horizontal scan lines per video field with fields occurring 60 times per second When this standard was originally conceived the average television was relatively small so a typical viewer would not be able to pick out the individual scan lines but would instead see what appears to be a smooth picture As televisions have grown larger however these lines have become more noticeable and with large televisions and projectors they have become an annoying element of the image Video Line Doublers were originally conceived to try to address this issue by increasing the number of lines scanned across the face of the display It is not simply a matter of drawing more lines To understand how a modern line doubler works it is necessary to understand the difference between interlace and progressive scanning Interlace scanning is used in today s standard analog televisions An interlaced TV paints the lines of a frame in two separate passes Half of the lines are drawn in the first pass the even lines and the other half the odd lines are drawn in the second pass First devised so that early TVs could have decent resolution with the limited transmission technologies available at the time interlaced scanning has several unfortunate side effects that are discussed below The first major problem with interlaced scanning is
4. These adapters are available through retailers specializing in high end audio and video equipment or from electronics supply houses such as Radio Shack Power Supply The iScan Plus v2 comes with a universal power supply module that accepts 100 240 VAC at 50 60 Hz Plug the power supply into the wall outlet and then plug the small round connector into the DC In jack on the back of the iScan Plus v2 There is a small gray ferrite that is designed to snap over the wire near the end of the small power cable that leads from the power supply to the iScan Plus v2 Looping the end of the cable through the ferrite twice in the same direction will secure it in place Color Space Selection The iScan Plus v2 can output video in one of two different color spaces The first is the Red Green Blue RGB color space that is commonly used for projectors displays and monitors that are designed to accept computer video output The second is Component Video but is more accurately called Y Pr Pb though you may hear it referred to as Y Pb Pr YUV Y Cr Cb or Y B Y R Y read Y B minus Y R minus Y This color space is commonly used for newer digital TV sets displays and projectors that are designed for use with Digital TV DTV tuners You will need to determine which color space is used by your progressively scanned display and move the Color Space switch on the back panel of the iScan Plus v2 to the appropriate position Typically inputs on d
5. connect a cable or antenna input we recommend running that cable to a VCR and using the composite video output from the VCR to the iScan Plus v2 We recommend using an S Video input for a DVD player satellite receiver and or digital cable box For VCRs or laserdisc players chances are good that using the composite video input will give you a better picture because the iScan Plus v2 typically has better Y C separation circuitry than most of these devices However you should try both composite and S Video to see which works better in your system The iScan Plus v2 will automatically search for and select whichever of the three input ports is active You can also specify a priority input choice so that if two or more of the inputs are active the priority switch indicates which input to use See the Operation Section for more detail Output In order to connect the iScan Plus v2 to your progressive scan TV video monitor or projector you will need to determine what type of connector and what type of color space is used by your set For some types of connections you will also need to know which wire of the cable needs to be plugged into which connector on the display device It is recommended that you also consult your display owner s manual for more details about your particular configuration requirements The iScan Plus v2 uses a single 15 pin VGA style connector for its output This is the same type of connector that most computers use to dr
6. display burn in This is an effect that is caused by the phosphor or plasma slowly wearing out in 12 Silicon Image Inc OScan Plus v2 User Manual the center of the screen where the video is at a different rate than on the edges where the black bars are This would leave a visible dark area in the center when you return to widescreen mode Since nearly all televisions sold are CRT based it is likely that the gray bar setting is the safest for your display However LCD and DLP based projectors and displays do not suffer from burn in so it is safe to use the black bar setting Processing Mode Indicators There are three LED indicators on the iScan Plus v2 front panel that roughly indicate which processing mode is currently active The Film mode LED indicates that the iScan Plus v2 has recognized a 3 2 pulldown sequence from a video sequence that was originally captured from film The next LED Graphics indicates that iScan Plus v2 has determined that the input video was generated at 30 frames per second This is most commonly the case with material that was created using computer graphics The leftmost LED is labeled Video but is more accurately thought of as Video or Still This indicator will light whenever the video is from a regular 60 field per second video camera or when there is very little movement in the scene This LED may also appear briefly during normal processing of film sources When pro
7. which specifies which of the inputs to use when there are multiple active inputs This can be used if there is one particular input that you prefer to leave on at all times For instance you may wish to leave your VCR on but would like the iScan Plus v2 to switch to your DVD player whenever it is on In this case you would set your Input Priority switch to the number of the input that is connected to your DVD player such as S Video 1 Since the VCR is always on it will be selected when neither of the other two inputs are active When the DVD player is turned on the iScan Plus v2 will automatically switch to that input The iScan Plus v2 searches for active inputs in the following order First it checks the Input Priority switch selection If no active video signal is found on that input it then checks the S Video 1 input then S Video 2 then Composite Video 3 This search is continuous so if the iScan Plus v2 is processing an input which becomes inactive the iScan Plus v2 will then automatically switch to the next active input Likewise if the iScan Plus v2 is processing video from one input when a higher priority input becomes active it will automatically switch to using the new input If there is no active input the iScan Plus v2 will slowly flash between the three inputs After a while the iScan Plus v2 will turn off all of the indicators on the front panel except for Power This indicates that the iScan Plus v2 is in Sleep mode and
8. during installation The first the Input Priority switch was described above The second is the Colorspace select switch on the back panel and is used to change the output colorspace from RGB to component video YPrPb to match the Characteristics of your display device If your display supports progressive 31 5kHz signals on both RGB and YPrPb inputs we generally recommend using YPrPb due to the increase color controls available The iScan Plus v2 has a single video output connector which is the same connector used by the computer industry to connect computer monitors to computers This connector is called an HD 15 or VGA connector and has Red Green Blue H Sync and V Sync signals However if Component Video YPrPb colorspace is selected using the colorspace switch Y Pr and Pb signals are placed on the Green Red and Blue signal pins respectively A high quality VGA to VGA computer monitor cable should be used to connect the iScan Plus v2 s output to devices that can only accept progressive signals through a VGA connector A standard VGA to BNC breakout cable can be used to attach the iScan Plus v2 to any projector or television that has BNC connectors Your iScan dealer may stock these cables or if not they should be able to recommend a store that does carry them A set of three BNC to RCA adapters can be used with this same cable for connecting to televisions with component video RCA inputs In this case no sync signals
9. the board and that the front LEDs appear through the front panel Verify that the front panel switches protrude fully through the panel A 29 Replace the copper grounding clip so that it tucks between the The iScan board sits in the bottom slot power connector and the PC with the metal enclosure See below board and so that it makes contact 30 Place the EMI gasket and the back panel over the connectors and make sure that it is flush with the sides of the housing 31 Screw the two screws into the rear panel of the unit You may want to attach a note to the iScan Plus v2 specifying which internal setting you have changed Silicon Image Inc Scan Plus v2 User Manual This will be helpful at a later time when you may need to reconfigure your iScan Plus v2 to work with a new display device 25 Silicon Image Inc OScan Plus v2 User Manual Appendix B EMI Ferrite Snap on Collar To meet FCC EMI guidelines the iScan Plus v2 power supply comes with a snap on ferrite collar similar to those supplied with laptop computers and other portable electronic devices The ferrite collar should be snapped on the end of the cable leading from the power supply to the iScan Plus v2 as shown in the illustration Looping the power supply cable twice through the ferrite and placing the ferrite as near the end of the cable as possible will maximize its effectiveness 26 Silicon Image Inc OScan Plus v2 User Manual
10. Pr signal on the output cable is OK and the Pb input on the television is OK Try the same with the Pb signal and the Pr input connector to verify the Pb cable connection and the Pr input Beyond this we don t know what to suggest other than to try calling your dealer My display looks great except when I m playing a video tape Then it slants to the right or has a strange bowing at the top of the screen This is typically due to the display s inability to handle the erratic timing of a VCR The same display may be able to handle this timing on the lower frequency inputs composite or S Video but when that same signal is doubled using the iScan Plus v2 the display cannot track the timing We have included a TBC time base correction circuit in the iScan Plus v2 to try to help these types of displays Check out Appendix A make the change to the VCR Mode jumper and see if that helps When enabled VCR Mode may slightly increase the level of video noise in the picture so we do not recommend making this change unless you are having trouble playing tapes on your VCR Where can I get information to determine if the iScan Plus v2 is a good match for my display device The iScan Plus v2 will provide superior decoding deinterlacing 3 2 pulldown detection and motion compensation However many display devices have poor quality scaling which takes place after the iScan Plus v2 processing and may in fact degrade the video that will be
11. Scars y2 User Manual Table of Contents Scan Plus User Manual TABLE OF CONTENTS 2 INTRODUCTION 4 IN A NUTSHELL 5 INSTALLATION 5 OPERATION 6 INSTALLATION AND SETUP 7 TYPICAL CONFIGURATION 7 SYSTEM REQUIREMENTS 8 CONNECTIONS 8 COLOR SPACE SELECTION 10 SYNCHRONIZATION SIGNALS 10 OPERATION 12 INPUT SELECTION 12 ASPECT RATIO CONTROL SQUEEZE MODE 12 PROCESSING MODE INDICATORS 13 POWER USAGE AND ENVIRONMENTAL REQUIREMENTS 13 TROUBLESHOOTING 14 HOW IT WORKS 17 BACKGROUND 17 DEINTERLACING 17 VIDEO PROCESSING 19 TECHNICAL SPECIFICATIONS 20 Scan Plus User Manual WARRANTY INFORMATION 21 SAFETY INFORMATION 22 SAFEGUARDS 22 PRECAUTIONS 22 APPENDIX A INTERNAL JUMPER SETTINGS 23 REMOVING THE ISCAN PLUS V2 MOTHERBOARD 23 MODIFYING COMPOSITE SYNC JUMPER SETTING 23 MODIFYING SYNC ON GREEN JUMPER SETTING 24 MODIFYING VCR MODE JUMPER SETTING 24 REASSEMBLING THE ISCAN PLUS v2 24 APPENDIX B EMI FERRITE SNAP ON COLLAR 26 Note DVDO PureProgressive Scan iScan iScan Plus and iScan Plus v2 are trademarks of Silicon Image Inc This product is covered by pending U S and foreign patents Silicon Image Inc OScan Plus v2 User Manual Your iScan Plus v2 package contains e iScan Plus v2 Line Doubling Upconverter e Universal power supply module e Power cable e Composite input cable e S Video input cable e Warranty card e User Manual Your iScan Plus v2 package does not con
12. are required so the gray or white and black wires can be left unconnected These are available at higher end video houses or electronics supply stores like Radio Shack For RGB devices the iScan Plus v2 defaults to separate H and V syncs whereas for YPrPb sync on Y is used Inside of the iScan Plus v2 there are two jumpers that can be set to enable sync on green and composite sync signals These are described in Appendix A These are only needed for high end RGB projectors not for television sets They are never needed if your display has a YPrPb input A small gray ferrite is shipped with the iScan Plus v2 power supply module It should be installed on the end of the small cable coming from the power supply to the iScan Plus v2 Looping the wire through the ferrite twice in the same direction is an easy way of securing it in position and will cause the ferrite to be more effective in removing high frequency noise from the system Silicon Image Inc Scan Plus v2 User Manual Operation The only switch on the iScan Plus v2 that is not typically limited to installation usage is the Aspect Ratio switch It is only required for widescreen televisions that have no aspect ratio control when using the iScan Plus v2 There are three positions on the Aspect Ratio switch Normal Squeeze black and Squeeze gray The Normal setting will pass any video input through with no modifications to the aspect ratio The two squeeze settings wi
13. cessing video from certain video game consoles or occasionally from other devices you may notice that all three mode indicators are lit This indicates a fourth processing mode single field sources In this mode the iScan Plus v2 is optimizing its processing in order to create a high quality output signal for these special signal types In order to avoid distracting you with random lights flashing the iScan Plus v2 changes these indicators much more slowly than the processing mode actually changes For instance even though the iScan Plus v2 may be able to detect and switch modes dozens of times per second the indicators will change at most once every second or two Power Usage and Environmental Requirements Your iScan Plus v2 is designed to operate in an ambient temperature environment of 0 C to 35 C 32 F to 95 F In normal operation at a room temperature of 25 C 77 F the top of the unit will be warm to the touch This is completely normal and is due the fact that the iScan Plus v2 was designed to use the enclosure as a heat dissipater in order to keep the components inside cooler As with most consumer electronics devices we suggest that the iScan Plus v2 not be placed in a small enclosure with no venting for heat to dissipate The iScan Plus v2 can be left plugged in and powered up for years The V2 has a low power sleep mode which is activated when there are no video signals that are active at the input connectors This mo
14. de significantly reduces the power used by the iScan Plus v2 However if you prefer to have the iScan Plus v2 on a switched outlet that is OK as well 13 Silicon Image Inc OScan Plus v2 User Manual Troubleshooting What do Ido if no LEDs light when I plug the power supply The iScan Plus v2 should automatically come on when plugged in Check the connections to the iScan Plus v2 and to the power source If all of these look good you may have a failed power supply What do I do if the power is on but I get no picture on the screen The basic troubleshooting procedure is 1 2 Check the Power indicator If it s not lit you may have a bad power supply If the Power indicator is lit check the Input indicators Does the iScan Plus v2 indicate that the input is active If so try plugging that same input cable directly into your display to see if that works If it s OK plug it back into the iScan Plus v2 and make sure that again the input indicator switches to that input If it s an S Video signal try using the other S Video input on the iScan Plus v2 In order to test the output we generally recommend hooking up the iScan Plus v2 to any inexpensive computer monitor using a standard VGA gt VGA computer monitor cable Make sure that you use a different cable than the one that you are using for your display Also make sure that the Colorspace switch on the back of the iScan Plus v2 is set to the RGB
15. e e gt L Front of board di Silicon Image Inc OScan Plus v2 User Manual straddling the two pins labeled NORMAL which are nearest the front of the iScan board 21 Remove this jumper from its current position by grabbing the top of the jumper and pulling directly away from the PC board Modifying Sync on Green Jumper Setting 23 To configure the unit to merge sync with Green you should work with the jumper labeled SYNC ON G There should already be a jumper on two of the pins labeled NORMAL 24 Remove this jumper and push onto the two pins closest to the rear of the iScan board labeled SYNC ON G Modifying VCR Mode Jumper umperison NORMAL pias Setting 25 To enable the iScan Plus v2 s time base corrector you will need to modify the setting of a jumper which is not labeled See the diagram above for the location A plastic jumper should already be straddling the two pins that are closest to the rear of the board 26 Remove this jumper from its current position by grabbing the top of the jumper and pulling directly away from the PC board 27 Push the jumper onto the two pins closest to the front of the board Note that this is the opposite convention from the other two jumpers which are in NORMAL mode when on the two rear most pins Reassembling the iScan Plus v2 28 Push the PC board back into the unit slowly being careful that the bottom slots in the housing are used to guide
16. er devices require that the composite sync signal be further combined with the RGB Green signal This is referred to as sync on green and is typically connected to the device using 3 BNC connectors though 3 RCAs may also be used If your output device falls into either of these last two categories composite sync or sync on green the iScan Plus v2 will need to be internally configured to output the appropriate type of sync signal To do this you will need to follow the directions in Appendix A With Y Pr Pb connections the composite sync is always combined with the Y signal The iScan Plus v2 will automatically do this whenever the color space switch is set to Y Pr Pb It is not required to configure any of the internal jumpers for any Y Pr Pb device Wire Color RGB HV RGB S comp Other R Red R Red G Green G Green B Blue B Blue H Horizontal C Sync V Vertical no connect Table 1 Wire Color Cross Reference 11 Silicon Image Inc Scan Plus v2 User Manual Operation Input Selection The iScan Plus v2 has been designed to detect which of the three possible input devices are turned on and are generating video signals and then to automatically switch to this input With this capability you can switch inputs simply by turning one input device on or by turning another device off To improve this functionality we have included an Input Priority switch found on the front of the iScan Plus v2
17. er refinement of this algorithm would be to apply the softening filter only to portions of the image that are in movement This is referred to as motion adaptive deinterlacing The most advanced and best quality Line Doublers are designed to also take advantage of the 3 2 pulldown technique that is used to transfer film to video During this transfer the first film frame is captured onto 2 video fields first even then odd lines are scanned then the second film frame is captured onto 3 video fields even odd even As this is repeated you can see that two 24Fps film frames for a total of 1 12 of a second are captured onto five 60fps video fields for a total of 1 12 of a second A deinterlacer can examine a series of fields to detect this sequence and thereby determine that the original pre video source of this sequence was film It can then reassemble the original progressive frames from the partial interlaced fields with no loss of resolution or with no introduction of motion artifacts Silicon Image s DVDO technology performs even more advanced techniques than those described above Performing over six billion arithmetic operations per second on the incoming video stream the iScan Plus v2 uses the data from four video fields during its processing It can determine not only which portions of the image are in motion but also what type of movement this is and how best to generate a progressive image with maximum picture detail and
18. is consuming less power As soon as any video input becomes active the iScan Plus v2 will wake up and begin processing the input Aspect Ratio Control Squeeze Mode Most widescreen television sets will provide a button on the remote control that allows you to change the aspect ratio of the displayed image This will allow the user to view normal material 4 3 in a smaller region in the center of the screen with black or gray bars to the left and right of the image However some of these sets disable this control when receiving a high definition HDTV signal or a signal that has been upconverted If you have a widescreen TV you will be able to determine the function of the Aspect Ratio control switch simply by moving it up and down into the three positions and watching the output In the top position video material is passed though the iScan Plus v2 with no change in aspect ratio This is perfect for anamorphic DVDs but will cause regular 4 3 pan and scan or 4 3 letterboxed material to look too wide with all of the people and buildings appearing too short and too fat The bottom two settings will correct this aspect ratio problem The only difference between these two settings is that one will use black bars on the sides of the image whereas the other will use gray bars We strongly recommend that if your display is a CRT or plasma based unit that you use the gray bars If you were to use the black bars instead you are guaranteed to cause some
19. isplay devices that are labeled Component Video DTV or HDTV are Y Pr Pb whereas inputs that are labeled Computer or VGA are RGB Once set up this switch should not need to be changed unless you are changing display devices Synchronization Signals All video devices require one or more synchronization signals that tell the device when to start a new line and or a new field For Y Pr Pb devices this sync information is embedded in the Y signal For RGB devices there are a variety of ways that this sync information can be conveyed and the iScan Plus v2 can support most of these The iScan Plus v2 generates separate H horizontal and 10 Silicon Image Inc OScan Plus v2 User Manual V vertical sync signals in addition to the RGB outputs This results in a total of five signals RGB HV For many configurations these five signals will be part of a single VGA gt VGA output cable and there will be no need to worry about the individual signals For some devices you may need to connect all five of these signals to individual BNC or possibly RCA type connectors See Table 1 below for more specific connection info Some display devices require that the two H and V sync signals be combined into a single composite sync signal resulting in a total of 4 signals RGB S Devices requiring composite sync typically accept the three video signals as well as the composite sync signal on BNC type connectors Oth
20. ive computer monitors A wide variety of monitors and projectors can be used with the iScan Plus v2 but you will need to determine which connector your display device requires either VGA BNC or RCA connectors as described below Typical Display Connectors VGA Connector One type of input connector that can be found on some TVs and projectors is the same VGA connector used by the iScan Plus v2 This type of connector is typically found on monitors and projectors that are designed to accept input from a computer High quality male VGA to maleVGA cables are available through retailers specializing in home theater or high end computer stores Silicon Image Inc Scan Plus v2 User Manual Silicon Image Inc Scan Plus v2 User Manual BNC Connectors Another type of input that is found on many display devices is the BNC connector There are usually either 3 4 or 5 BNC connectors depending on how your display device handles synchronization signals These connectors are used on higher end TVs monitors and CRT projectors These connectors are most commonly used for RGB but are sometimes used for Y Pr Pb signals as well RCA Connector The most common plug used for Component Video connections consists of 3 RCA type jacks These are the same connectors that are used for many types of audio connections VGA to RCA cables are very rare so we recommend using a VGA to BNC cable above in combination with a set of three BNC to RCA adapters
21. justments not described in this manual Attempting to do so could expose you to dangerous electrical shock or other hazards It may also cause damage to your iScan Plus v2 Do not attempt to service this unit Instead disconnect it and contact your authorized Silicon Image dealer or distributor or Silicon Image directly WARNING FCC Regulations state that any unauthorized changes or modifications to this equipment not expressly approved by the manufacturer could void the user s authority to operate this equipment 22 Silicon Image Inc OScan Plus v2 User Manual Appendix A Internal Jumper Settings These modifications are only required in very rare circumstances Composite Sync and Sync on Green are only required in RGB mode never Component video Y Pr Pb mode and typically only with older large front projectors The rule of thumb is if you are seeing a picture on your display then you have the sync settings correct VCR mode is only needed for the few displays that are unable to handle the erratic timing of a VCR To modify these internal settings you will need to change a jumper that is only available after opening up your iScan Plus v2 unit Read through these instructions first and if you feel that you are not comfortable with performing this type of operation please ask your dealer to make the modification for you They are generally happy to do so Removing the iScan Plus v2 motherboard 13 Find an electr
22. ll horizontally compress the video image so that it fits into a smaller portion of the frame This will allow a 4 3 aspect ratio image to be displayed in a 4 3 portion of a 16 9 screen When squeezing the image the iScan Plus v2 will put either black or gray bars on the side of the video To avoid burn in it is strongly recommended that gray bars be used for all CRT based front and rear screen projectors and normal tube type televisions LCD or DLP based displays can use the Squeeze black setting The iScan Plus v2 can be left plugged in and powered up for years The V2 has a low power sleep mode which is activated when there are no video signals that are active at the input connectors This mode significantly reduces the power used by the iScan Plus v2 Silicon Image Inc OScan Plus v2 User Manual Installation and Setup Typical Configuration Figure 1 shows a typical configuration for a home theater system In this setup an iScan Plus v2 is being used to enhance the output from a DVD player satellite receiver and a VCR before the selected signal is sent to a rear screen projection TV or other progressively scanned display device Your configuration may be significantly different from this but the basic functional blocks input devices input cables iScan Plus v2 output cable and display device will exist in your system One common deviation from this configuration is to use an A V Receiver or other video switching device t
23. minimum motion artifacts The iScan Plus v2 also performs excellent 3 2 pulldown detection In addition it also recognizes the 2 2 pulldown sequence used for converting computer graphics to video For these film and computer graphics sources the iScan Plus v2 will reassemble the original progressive frames with no unnecessary filtering of image detail 18 Silicon Image Inc OScan Plus v2 User Manual Deinterlacing 480i to 480p Display Video Analog to Decoding s Digital to Source Digital NTSC to Ss I I 5 0 2 Analog or Conversion Component Conversion Projector Chip Figure 4 System Block Diagram Video Processing All of the processing steps in the signal chain between your video source and the display influence the quality of the image The following are brief descriptions of the series of steps shown in Figure 4 1 A signalis generated by a source DVD player Laser Disc VCR Cable Box DSS Receiver 2 The signal is converted from analog to digital 3 The digital video signal is decoded from NTSC composite or S Video Y C to its basic components of Y Cr and Cb 4 The component signal is converted from interlace to progressive by the Sil502 chip 5 The progressive signal is converted back to analog RGB or Y Pb Pr and sent over a cable to the display The iScan Plus v2 processes steps 2 3 4 and 5 but the final quality of the displayed image depends both on the quality of the sou
24. o switch the video signals from the input devices In this case the input devices shown below will be connected to the inputs of the A V Receiver The output of the A V Receiver will be then be the only input device to the iScan Plus v2 Cable TV Input Devices DVD Player Scan Plus v2 Input N Cables Output Cable Power Supply Progressively scanned Rear screen TV or other i display Display Device Figure 1 Example Home Theater setup Silicon Image Inc OScan Plus v2 User Manual System Requirements The iScan Plus v2 is designed to interface to progressively scanned display devices that can draw horizontal scan lines at a rate of 31 5 KHz Normal televisions operate only at 15 75 KHz but HDTVs data projectors high frequency video projectors and computer monitors typically operate at the higher frequency You should verify that your display is capable of operating at this horizontal scan rate Your dealer should be able to help answer this question The iScan Plus v2 accepts input from virtually any NTSC video source since it can be driven with either an S Video or composite video connection Connections Inputs There are three available inputs on the iScan Plus v2 Inputs 1 and 2 connect to devices with S Video outputs These connections are sometimes called S VHS Input 3 accepts input from any device with an NTSC video output also called composite video such as a typical VCR To
25. ogressive Source Detection and reassembly of original frames e Motion detection on fine grained cell basis e Motion adaptive video deinterlacing e Cubic interpolation for pixel calculations e Diagonal processing reduces jaggies Cables included e S Video and Composite Video Power e 100 240VAC 50 60Hz e Automatic sleep low power mode when all inputs inactive 20 Silicon Image Inc OScan Plus v2 User Manual Silicon Image warranties the iScan Plus v2 for 12 months starting from the date of shipment In order to make the repair replacement process as painless as possible for our customers Silicon Image has asked our licensed distributors and dealers to administer this warranty The iScan Plus v2 was designed to operate continuously for many years If you have any problems with the unit please call or visit the dealer where you purchased the iScan Plus v2 They will be happy to assist you Should your iScan Plus v2 need repair or replacement your dealer will be able to handle that for you as well 21 Silicon Image Inc OScan Plus v2 User Manual Safeguards To reduce the risk of electric shock do not expose this appliance to rain or moisture do not operate the iScan Plus v2 with the cover removed Ifthe wall plug does not fit into your local power socket then ask your electrician to replace your obsolete outlet Do not modify the wall plug To do so will void the safety feature Precautions Warning
26. ostatic free environment to work at Having no carpeting or static free carpeting is strongly recommended If you can find an area with some heavy metal parts within easy reaching distance touching these will allow you to discharge yourself before beginning work 14 Turn the iScan Plus v2 unit so that the back of the unit is facing you Remove the two screws on the back of the unit and set aside in a safe place you will definitely need these screws later 15 Discharge yourself by touching some grounded heavy metal object nearby 16 Pull the back panel and EMI gasket off of the unit The iScan Plus v2 printed circuit board is seated in the bottom slot in the chassis housing 17 Notice the small metal clip straddling the board below the power input connector You will need to remove this clip and put it aside Rear of board g y for replacement later so pay careful attention to how it is mounted on the board See picture on next page 18 Pull the board all of the way out of the housing 19 There are three sets of jumpers on the board shown on the figure at right Each of these locations should have three pins sticking straight up out of the board with a little plastic jumper straddling two of these pins Modifying Composite Sync Jumper Setting 20 To configure the unit to output Composite Sync you should work with VCR Mode the jumper labeled C SYNC A little ERE plastic jumper should already be a i heehe
27. position Since all but the most ancient computer monitors are capable of displaying a VGA type signal and since the iScan Plus v2 generates nearly an identical signal this should allow you to reliably check the output of the iScan Plus v2 If the computer monitor displays the video OK then the problem is either in the original video output cable it s connection to the display the colorspace setting or in the display itself Try a different output cable with your display to see if that s the problem Try flipping the colorspace switch back and forth to see if that helps If neither of these helps verify once again that your display is capable of accepting a 31 5 KHz input Beyond this you may wish to contact the dealer where you bought the iScan Plus v2 and or the display 11 Are one or all three of the Processing Mode indicators lit If none of them are lit but the Input indicators show a stable active source then there is something wrong with the iScan Plus v2 12 If the computer monitor doesn t show the video output and a different cable was used then it sounds like there might be something wrong with the iScan Plus v2 In these cases you should talk to your dealer or distributor and ask for a replacement iScan Plus v2 What do I do if the power is on and I get a stable image but my colors are screwed up Using a DVD or VCR in pause mode do the following Flip the color space switch on the back panel of the iScan Plu
28. rce and the display device 19 Silicon Image Inc OScan Plus v2 User Manual Technical Specifications Video Inputs e Two S Video Y C inputs on standard mini DIN connectors e One Composite video input on standard RCA connector e Auto sensing and switching with input priority switch e Accepts standard NTSC interlace scan video signals Video Output e 15 pin VGA type HD 15 connector e User selectable RGB or Y Pr Pb output color space e Signal levels 0 700mV e Separate H V synchronization standard user selectable composite sync and sync on green e Sync pulses 300mV e Outputs 480p progressive scan video 31 5kHz scan rate e 525 total video lines per frame 480 active lines e 10 bit video DACs Controls e Input select priority switch 1 2 3 e Color space select RGB or Y Pr Pb e Squeeze mode control Squeeze w black borders Squeeze w Gray borders Normal e Sync on Green Composite Sync VCR mode jumpers inside of unit Input Stage e High detail low noise video decoder e High quality adaptive Y C comb filter Source Detection e Film 3 2 pulldown e Computer Graphics 30 Fps or 2 2 pulldown e Video camera e Video game consoles single field sources e Advanced Transition Management smooth handling of source sequence changes e Auto dynamic thresholds enable reliable 3 2 pulldown detection even with noisy sources Video Processing e Four input fields used to determine contents of each output frame e Pr
29. s by which interlaced video is converted to progressively scanned video Progressive scanning paints all of the lines of a frame in one top to bottom pass This is used where transmission bandwidth is not an issue and where the highest quality image is required None of the interlaced side effects are present with progressive scanning Devices for performing deinterlacing are available for tens of dollars for low quality techniques or for many thousands of dollars for very sophisticated techniques The low cost techniques are frequently used in progressively scanned TVs or projectors High quality algorithms capable of generating very high quality video are typically used in Line Doublers designed for high end home theater markets Some very inexpensive deinterlacers simply put fields together creating an output frame containing even lines from one point in time and odd lines from 1 60 second later Any motion between these two fields will result in the motion artifacts illustrated above To avoid these artifacts some deinterlacers simply scale each of the fields up to the entire frame size interpolating between the existing lines Unfortunately this also significantly reduces the vertical resolution of the image resulting in softening of the picture with loss of image detail One method of avoiding this softening is to determine if there is any movement between fields by comparing each of the fields with its counterpart in a previous frame Furth
30. s v2 to see if that fixes it If not try wiggling the output cable at the iScan Plus v2 and at the display to see if it has any effect If you are using an RGB device with BNC try removing all three color signals Red Green Blue and reinserting them one at a time First insert the Red wire into the Red input connector and see if the image appears but is red 14 Silicon Image Inc OScan Plus v2 User Manual Then remove the Red signal and insert the Blue signal into the Blue connector and verify that the picture is blue Then repeat with only the Green Ifall three of these work then plug them all back in again Still messed up It may be that the colors on the cable are mislabeled Using a source with colors that you are familiar with try to determine if two of the colors are swapped If you are not using RGB but are using Y Pr Pb inputs then try removing the Pr and Pb red and blue connectors from your display This should result in a black and white picture Insert just the Pr red signal into the Pr connector This should result in a red picture Remove the Pr and insert the Pb into the Pb connector This should give you a blue picture If one or the other of these combinations does not give the expected results it may be a problem with the output cable or the input connectors on the display Try plugging the Pr connector into the Pb input and verify that the video is blue If it is that means that the
31. tain an output cable You will need to get an output cable that works with your display device There is more information on these cables in the Installation section The iScan Plus v2 is designed to interface to 31 5 kHz progressively scanned display devices such as HDTVs Progressive scan and Multimedia TVs Plasma TVs Data projectors Home Theater video projectors 31 5KHz scan rate required eff o If you are not sure if your display will work with the iScan Plus v2 check the compatibility list on our web site www dvdo com Silicon Image Inc Scan Plus v2 User Manual If you already know about line doublers and have had experience installing these devices here s a summary of what is unique about the iScan Plus v2 Installation The iScan Plus v2 has 3 input ports and 1 output port The inputs are auto sensing and switching which means that they will automatically switch to whichever input is active The Input Priority switch allows you to select which input should be used when more than one is active We recommend using S Video inputs for DVD players satellite receivers and or digital cable boxes For VCRs or laserdisc players chances are good that using the composite video input will give you a better picture because of the very good Y C separator in the iScan Plus v2 However you should try both composite and S Video to see which works better in your system There are two switches that are of interest
32. that the image may visibly flicker if the screen is large enough that it represents a significant portion of the viewing angle Even with small screens sharp edges on objects may flicker This effect is due to the fact that only every other line is drawn on each pass causing hard edges to appear to move up and down on each field In addition more problems are caused by the fact that horizontal lines that are one above the other are from two different fields that is they were not captured by the video camera at the same time and they are not drawn on the screen at the same time If motion occurs during the time between these two fields the edge of the moving object will appear to be very jagged This jagged edge is usually not noticeable to most television viewers because as the new field is being drawn the older field is fading in intensity However on high resolution displays or on devices such as Liquid Crystal Displays LCD s or plasma panels that do not fade an interlaced image will contain noticeable motion artifacts These types of effects are the reason that a line doubler can t simply repeat each of the incoming lines and expect the output image to be acceptable Instead a doubler will first have to fully deinterlace the image removing the motion artifacts described above while still retaining as much detail as possible Deinterlacing 17 Silicon Image Inc OScan Plus v2 User Manual Deinterlacing is the proces
33. viewed In addition to the iScan I also have an HDTV decoder How do I hook them both up to my TV set which only has one YPrPb input There are a variety of video switchers available for lt 150 that are very high quality Most of these are designed to allow the use of one computer monitor with more than one computer We recommend finding one that can handle at least SXGA type signals These devices use a standard female VGA connector for the display connection but sometimes use two male VGA connectors to connect to the computers Since the iScan has a female VGA connector you will need a VGA Extender cable not a regular VGA cable to hook it up to the input of the switcher 15 Silicon Image Inc OScan Plus v2 User Manual This type of switcher could be used for either RGB or YPrPb type displays If you are still having problems or have more involved questions you should contact your authorized iScan Plus v2 dealer or distributor They will be happy to help you 16 Silicon Image Inc OScan Plus v2 User Manual Background On a normal television the video image is made by sweeping an electron beam across the face of the set where it excites phosphors causing them to glow While repeated scanning across the tube the television changes the intensity of the beam to vary the brightness of the image If you look closely at the picture on a television set you will see the horizontal scan lines that make up the image
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