OptoFidelity Video Multimeter User Manual
Contents
1. OptoFidelity Video Multimeter User Manual Version 2013Q2 0 a s OptoFidelity OptoFidelity Oy e sales optofidelity com e www optofidelity com am OptoFidelity OptoFidelity Video Multimeter User Manual Contents 1 General information on OptoFidelity Video Multimeter 3 2 Stat WIC OW re coca a ae E E NE NA Na aka 3 3 Framerate measurement LaSK sierras ei ji a a eki aaa aaa 4 Seb Ea o tE RE TARE NEMA 4 SL oe o EM een cer 6 3 3 Configuration tab sano 6 24 COlOF CAND AON nina no 7 39 Saved data TGS ana giorno k 7 A WSR CONMC CUO o ae ee oe iia 8 5 Software update ne oo ae iii 9 6 Technical SPECIFICATIONS ccccccccnnnncnnnnnncnnnnnnnncnnnnnnnnnnnnnnnnnnnnnnnnanannnnanannnnnnns 10 F GANGE MSOV ardor ro 11 Page 2 of 11 OptoFidelity OptoFidelity Video Multimeter User Manual 1 General information on OptoFidelity Video Multimeter OptoFidelity Video Multimeter is a compact desktop solution for measuring the true and objective video playback performance of mobile tablet or any multimedia device directly from the display It is controlled with a touch display This resistive touch display works best with e g a finger nail or a pen 2 Start window When power is switched on the device starts and Start Window opens up All installed applications are listed in this window List can be browsed by dragging or with the arrow buttons on the right Measurement tasks Fra2. is ongoing the graph will scroll to show the results as shown in figure 4 39 frames Figure 4 Frame rate measurement in progress The vertical axis of the graph indicates the time that each frame is on the screen Readings on vertical axis are in milliseconds so for example frame interval of 40 milliseconds equals to frame rate 1 0 040 25 FPS Dropped frames are shown as red vertical bars if they occur Note To get repeatable results start and stop the measurement in the white period at the start and end of the video Such videos can be generated in OptoFidelity TVG by using setting calibration both After stopping the measurement the results can be studied on the Stats tab or saved using the Save button After saving the results a message window shows the name of the saved file like in figure 5 saved TJU frames to Alastvipse csv Figure 5 Message window after saving the measurement results Page 5 of 11 OptoFidelity OptoFidelity Video Multimeter User Manual 3 2 Statistics tab During or after performing a measurement you can switch to the statistics tab to see further information The view is shown in figure 6 Overview Contig Min Avg Dev Plan 36 40 3 44 is Frames Dropped 100 0 Figure 6 Statistics tab The upper row displays the minimum average standard deviation and maximum values of the frame intervals Lower row displays the total number of frames and the amo
3. Excel and many other data analysis tools 4 USB connection Video Multimeter can be connected to computer by a USB cable for battery charging and data transfer Charging will begin as soon as the USB cable is connected and is indicated by a red LED next to the USB connector When the battery is full the LED will turn off Note that if the device is on the LED will not turn off because power is being used Select whether you want to use USE for data transfer or just charge the device While data transfer is active other functions of the device are disabled Data transfer Charge anh Figure 9 USB mode selection screen When the USB cable is connected and the device is on a selection window such as in figure 9 opens up on the display The window has options Data transfer and Charge only If Data transfer is selected the device will appear as an USB memory on the computer Other functions of the device will not be available while the data transfer is active Selecting Charge only will simply close the dialog so that the device can be used normally while it is being charged Page 8 of 11 OptoFidelity OptoFidelity Video Multimeter User Manual 5 Software update Connect the device with USB cable to the computer to update the software Switch the power on while holding down the button next to power switch by e g a pen Device should become visible as a USB DFU device and drivers should be installed automatically Sta
4. cates that some colors have not been detected Calibration is performed as follows 1 Position fiber on a color marker on display The video must be running 2 Press Calibrate button on the Config tab Calibration takes few seconds and fiber must be kept still on the marker during this time 3 New calibration is valid immediately If required you can do calibration again or deactivate calibration by pressing the No calibration button Note Color calibration is only necessary for the RGB marker It is not necessary and cannot be successfully performed for other kinds of markers 3 5 Saved data files The saved data files from frame rate measurement are in semicolon separated CSV format Each row corresponds to one frame and has the following columns 1 Microsecond timestamp of the frame start 2 Microsecond length of the frame 1 for dropped frames 3 Color of the marker in the frame 4 Cumulative count of frames dropped since start of measurement Page 7 of 11 MO OptoFidelity OptoFidelity Video Multimeter User Manual A B C D 1 Recorded at 2013 05 27 08 39 18 using OptoFidelity Video Multimeter 2 Timestamp us Frame time us Color Total dropped frames 3 0 42560 F 0 4 42560 36640 y 0 5 79200 42560 g 0 6 121760 36620 c 0 Fi 160380 43550 b 0 8 203930 36620 p 0 9 240550 42590 r 0 10 283140 36620 y 0 Figure 8 Data file saved from frame rate measurement The CSV format is supported by e g Microsoft
5. merate Utilities X system Information Figure 1 Start window after turning on the device Applications are classified according to their purpose e Measurement tasks Measurement applications which are used to determine some feature of the device under test DUT e Utilities General utility programs for using and configuring Video Multimeter Page 3 of 11 OptoFidelity OptoFidelity Video Multimeter User Manual 3 Framerate measurement task The framerate measurement task determines the playback smoothness of the DUT with a test video A blinking marker is measured from the display of device and this marker helps to determine frame intervals and missing frames The basic measurement setup is shown in figure 2 Figure 2 Example of using Video Multimeter for frame rate measurement 3 1 Overview tab When the frame rate measurement application is started it opens to the overview tab shown in figure 3 On this tab you can start and stop measurements have an overview of the results and save them The overview tab shows the average FPS over the whole measurement and the total number of frames Config Ei O frames Figure 3 View of the application before measurement Page 4 of 11 OptoFidelity OptoFidelity Video Multimeter User Manual To begin a new measurement press the start button The measurement will start immediately and continue until you press the stop button While the measurement
6. rt Firmware upgrade application by computer and click Start button Application informs when the software upgrade is done Finally detach the device from computer and switch it off to exit the upgrade mode If software update is interrupted for some reason you can run the upgrade again as described above Upgrade mode is separate from the main software so damaged software does not prevent upgrading Note When the device is started in the firmware upgrade mode the screen will display random noise Reboot the device to exit the upgrade mode OptoFidelity Video Multimeter Firmware Upgrade a n OptoFidelity imaging fidelity experts Programming Figure 10 Firmware upgrade application Page 9 of 11 OptoFidelity 6 Technical specifications External dimensions Operating temperature range Storage temperature range Internal memory Operating time on battery Battery Operating current Built in fiber sensor bandwidth Built in fiber sensor sample rate Synchronization output voltage low Synchronization output voltage high Synchronization output impedance OptoFidelity Video Multimeter User Manual 12x8x3 cm 10 C to 40 C 20 C to 60 C 4 GB 6 hours Li Ion Panasonic PA L2 1950 mAh 7 Wh 300 mA 4 kHz 100 kS s 0 0 V to 0 4 V 2 9 V to 3 3 V 50 ohm Page 10 of 11 OptoFidelity OptoFidelity Video Multimeter User Manual 7 Change history Ver Stat
7. unt of dropped frames 3 3 Configuration tab By default the application uses RGB marker with built in color calibration This is suitable for most measurement situations with LCD displays For other kinds of displays adjustments on the Config tab may be necessary Overview Stats Marker type RGE b calor Calibrate RGB Figure 7 Configuration tab Page 6 of 11 OptoFidelity OptoFidelity Video Multimeter User Manual As shown in figure 7 the configuration tab allows selection of marker type and color calibration The available marker types are 1 RGB 6 color Marker with specific color sequence of 6 different colors This measures frame intervals and detects dropped frames 2 Black amp White Black and white marker Simple method for testing frame intervals but detecting dropped frames is not possible 3 Any change Any large change of color will be considered as a change of frame Can measure frame intervals of any marker but dropped frames will not be detected The selected marker type must match the type of the marker in the test video used 3 4 Color calibration The functionality of RGB marker depends on the color space of the DUT since RGB marker is based on colors Default settings can be applied for most LCD displays but OLED displays and other display technologies may require calibration You can easily see that calibration is needed if red bars turn up on the graph constantly This indi
8. us Date Author Remarks 5 3 2013 7 5 2013 Release 2013Q1 0 27 5 2013 FPS UI file format Page 11 of 11
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