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1. 2 Description of the Background Art Existing security systems for homes and commercial prop erties feature multiple video camera connected to a security box as shown in FIG 1 The security box contains electronics to convert analog video and optional audio inputs to digital and performs audio and video compression by a System On Chip SoC processor which then stores the results on a hard disk The system could be programmed for continuous recording in a loop recording upon a trigger caused by exter nal alarm and scene change threshold or timed scheduled recording The cameras are connected by cabling and video is transmitted as analog to the main system Such cabling makes it difficult to install the multiple camera inside and outside a residence or commercial because of routing of such long cabling between a user accessible box and cameras Such a system provides 240 frames per second capture which is divided by multiple cameras For a 8 camera system each camera video is captured at 240 8 or 30 fps but capture resolution is usually low at CIF resolution 350x240 Such a security box can display captured video live from cameras or from hard disk on a monitor or TV and user functions are controlled by front panel buttons or an infrared remote con trol unit RCU This means such a security box must be located near a TV and be visible for RCU operation Such a system also provides means for remote viewing over internet and can als2. 45 50 55 65 4 Using wide angle lenses causes a barrel effect Such lens defects are removed in real time by front end processing Motion adaptive spatial filtering compares each pixel of a given frame with same pixel from the last frame of video and filtered new video frame and unfiltered video frame are com bined with weights of x and 1 x respectively in accordance with difference said current and last frame pixel values This has the effect of filtering high motion areas since human visual system are less sensitive to noticing the resolution of such areas Motion adaptive temporal reduces the video noise when there is no motion without reducing the video resolu tion Two or more video frames are averaged on a pixel by pixel basis in other words depending on the region of a video frame in accordance with a IIR filter to reduce temporal noise The resultant effect of motion adaptive spatial and temporal filtering prior to video compression is to signifi cantly further increase the video compression and or increase video quality The output of motion adaptive spatial and temporal filter is compressed using the advanced video compression standard H 264 H 264 provides high video quality and at the same time reduces the amount of data that is necessary to store by a factor of 3 4 in relative to MPEG 2 standard This allows storage of data on a USB memory key at high quality without requiring the use of hard disk storage Har
3. bilities and could be physically located on the premises or anywhere else with Internet or phone access The present invention does not depend on network to stream the data in real time since captured data is already stored in high reso lution on local storage at the camera location as part of the 0 an 5 20 25 30 35 40 45 60 65 6 camera module Transrating helps matching the destination device and channel bandwidth capabilities but data could also be transmitted in non real time and displayed after transfer Present invention also provides for data for a desired win dow to be sent with PSNR or temporal scalability so that first a quick search could be performed for the region around an time of interest such as a alarm trigger point and fast forward type search could be done Then as a second step a higher resolution version or further layers of PSNR scalable reso lution could be requested around the region of interest The present invention provides scalable video quality since video data could be captured at HD based on a setup com mand remotely and then scaled spatially and transrated at the time of transmit request in accordance with channel and destination capabilities The audio video that is streamed upon request is encrypted using 802 11 WEP or other method to prevent viewing by other people and it is not normally streamed all the time there is more security against unauthorized acc
4. discreetly in multiple places without attracting attention and require only external power in some embodiments The lack of central storage prevents the central storage unit being stolen and a dummy central storage unit could be optionally used to provide the appear ance of damaged or removed evidence of stored video sur veillance data In one embodiment shown in FIG 3 the only connection required is the power connection to a 110V AC and such a small security module could be directly plugged in a power outlet or mounted near a light fixture to receive power The small memory key record button and status indicator is placed under a small keyed cover to prevent stopping or removing the USB memory key by an unauthorized access In this embodiment USB memory key can be removed and plugged in a PC or laptop for accessing the stored video loop Optionally the stored data on USB memory key can be encrypted so that only people with security key can access the stored surveillance video and audio data FIG 4 shows that CMOS image sensor interfaced to a camera Image Signal Processing ISP function as part of the camera module or the SoC ISP performs auto white balance auto gain Bayer conversion lens defect correction etc Since images from a CMOS sensor does not have issues of interlaced video input the resultant video is much higher quality and resolution up to and including 720P could easily be obtained 0 a 5 25 40
5. not required only said data enveloping said trigger event or a requested time zone is transmitted upon request by said remote device 0 an 5 25 40 45 50 55 65 8 2 The apparatus according to claim 1 further comprising a microphone an audio preamplifier an audio to digital conversion circuit and an audio compression unit and amultiplexer to combine output of said audio compression unit and said at least one video compression unit 3 Theapparatus according to claim 1 wherein said remov able non volatile semiconductor storage media uses flash memory including but not limited to a USB memory key a SDHC memory card a micro SD card 4 The apparatus according to claim 1 further including a rechargeable battery to power the apparatus and a solar cell to recharge said rechargeable battery 5 The apparatus according to claim 1 wherein said inter net interface unit uses HomePlug AV standard using power lines to connect to a local or remote device for transmission of data when requested 6 An apparatus for security and evidentiary recording the apparatus comprising a camera image sensor with at least high definition resolu tion for capturing video at 30 frames per second an audio microphone a removable flash memory including but not limited to USB memory key SD memory card or micro SD memory card a rechargeable battery a system on a chip processor coupled to said removable flash mem
6. reasons The present invention does not depend on a local central storage from multiple camera unit that could be easily removed by an intruder Advanced H 264 video com pression is used for video compression and for improved video quality and reduced storage requirements Video is stored at HD resolution but transmitted for a given region of interest to a remote location in requested resolution and video rate BRIEF DESCRIPTION OF DRAWINGS The accompanying drawings which are incorporated and form a part of this specification illustrate prior art and embodiments of the invention and together with the descrip tion serve to explain the principles of the invention FIG 1 shows detailed block diagram of a first prior art security system FIG 2 shows block diagram of a prior art of a second prior art security system FIG 3 shows block diagram of one embodiment of present invention FIG 4 shows block diagram of data flow and processing in present invention FIG 5 shows circular queue for continuous recording loop of audio and video FIG 6 shows block diagram of possible options for send ing video surveillance data to a remote monitoring site FIG 7 shows block diagram of second embodiment of present invention using wireless networking FIG 8 shows block diagram of third embodiment of present invention using power line networking FIG 9 shows block diagram of third embodiment of present invention using solar cell for charg
7. 10 9 Theapparatus according to claim 6 wherein said remov able flash memory is configured to be unplugged and plugged into a PC or a TV for viewing said video surveillance data 10 The apparatus according to claim 6 wherein contents of said removable flash memory are encrypted so that only people with security key is provided access to view said video surveillance data 11 The apparatus according to claim 6 wherein data is captured and stored with variable bit rate in said circular queue and is converted to a constant bit rate stream to trans mit over a low bandwidth network channel upon request 12 The apparatus according to claim 6 wherein said remote device is one of a personal computer a cell phone or a monitoring station 13 The apparatus according to claim 6 wherein the appa ratus also performs facial detection and triggers a certain action for a certain list of individuals 14 The apparatus according to claim 6 wherein an elec tronic bill of material cost is less than 75
8. RELESS E INTERFACE i REMOVABLE NON VOLATILE STORAGE Figure 7 U S Patent Jul 15 2014 Sheet 8 of 11 US 8 780 199 B2 DRAM Flash Memory Memory CMOS Sensor d c VIDEO SoC Processor oipny pu3 juo13 POWER 110V AC SUPPLY POWERLINE INPUT AND INTERFACE REGULATORS REMOVABLE NON VOLATILE STORAGE POWERLINE INTERFACE 110V AC INPUT PC or LAPTOP Figure 8 U S Patent Jul 15 2014 CMOS Sensor amp Lens M S VIDEO Sheet 9 of 11 US 8 780 199 B2 RECHARGABLE BATTERY RE j GULATORS T DRAM Flash Memory Memory SoC Processor 3G DATA USB WIRELESS MEMORY INTERFACE KEY REMOVABLE NON VOLATILE STORAGE Figure 9 U S Patent Jul 15 2014 Sheet 10 of 11 US 8 780 199 B2 S3HONI oe 4 2 INCHES DEPTH Inch Figure 10 U S Patent Jul 15 2014 Sheet 11 of 11 US 8 780 199 B2 eU mmm 4 2 INCHES 9 DEPTH Inch Figure 11 US 8 780 199 B2 1 NETWORKED SECURITY CAMERA WITH LOCAL STORAGE AND CONTINUOUS RECORDING LOOP BACKGROUND OF THE INVENTION 1 Field of the Invention The invention relates generally to the field of security and specifically to the field of audio video security recording for security purposes More particularly the present invention relates to performing audio and video compression and stor ing data in a local storage that is networked
9. The following remote commands could be executed by the camera module Status Provides current status recording stopped start of times motion detected etc Mode Resolution requested or layer of PSNR scalable data to be sent for desired range Record Start recording mode Stop Stop recording Stream Video Clip Sends from T1 to T2 for a specific date This could be done in real time or as a file transfer in non real time depending upon the connection and avail able bandwidth The local storage of surveillance data and the ability to transrating the stored data by the SoC of present invention provides the capability of transmitting regions of interest of previously recorded audio video data with temporal or spatial scalability in accordance to available network channel band width and or target device display capability For example if the target device requesting data is a mobile networked per sonal media player or cell phone with such display capabil ity then compressed video data is partially decompressed and then compressed again at the display resolution referred to as transrating The present invention also provides ability to temporarily scale compressed data for remote fast forward and search capability and once a desired region of interest is located then higher resolution video of the same could be requested by the central device The central device could be monitoring station or a cell phone with video playback capa
10. US008780199B2 az United States Patent Mimar US 8 780 199 B2 Jul 15 2014 10 Patent No 45 Date of Patent 54 NETWORKED SECURITY CAMERA WITH LOCAL STORAGE AND CONTINUOUS 56 References Cited U S PATENT DOCUMENTS RECORDING LOOP 6 333 759 Bl 12 2001 Mazzilli 1 1 7 228 429 B2 6 2007 Monroe 76 Inventor Tibet Mimar Morgan Hill CA US 7319485 B2 1 2008 Szolyga et al 2003 0156192 AI 8 2003 Cho x es Seca 2006 0209187 Al 9 2006 Farneman EN Notice Subject toany eee fhe e p 2008 0020354 Al 1 2008 Goree et al 2 434 11 patent is extended or adjusted under 2008 0190639 Al 8 2008 Baran et al 174 50 U S C 154 b by 366 days 2009 0207301 Al 8 2009 Fransson 348 371 2009 0278945 Al 11 2009 Lin 348 208 1 This patent is subject to a terminal dis 2010 0139290 Al 6 2010 Leblond 62 3 3 claimer OTHER PUBLICATIONS Wireless G Internet Home Monitoring Camera Cisco Model 21 Appl No 12 586 355 WVCS54GCA pp 1 2 California USA Jul 2004 QSD9004 User Manual Q See p 1 40 Feb 2009 California USA 22 Filed 20 2009 Er pus Sep 20 200 cited by examiner 65 Prior Publication Data Primary Examiner Yves Dalencourt 57 ABSTRACT US 2012 0307043 A1 De A networked surveillance audio video recorder for security applications with local storage and continuous record loop 51 Int Cl using high definition video and encr
11. bit stream rates These capabilities provide means for advanced processing and storage at each security node without having to stream multiple streams of low quality data at each camera site The present invention uses a System on Chip SoC connected to aremovable non volatile semiconductor storage such as USB memory key to continuously record audio and video in a forever loop on said USB memory key or other type of Flash non volatile memory where each loop is completed in mul tiple days or more in accordance to size of USB memory key used This is different than existing security systems because video is recorded in high quality of standard definition 640x 480 with image sensor image processing and storage of surveillance data collocated at the camera site without having to stream data continuously over cabling or wireless in real time Also advanced image processing and video compres sion is used for high quality video image up to 720P HD resolution in comparison to today s CIF resolution security cameras at less than 30 fps resolution using MPEG 2 MPEG 4 2 or motion JPEG with lower quality If there is security event past audio video data for the last couple of days could be examined Since the present invention does not use a hard disk and just a small USB memory Key is used in one embodi ment in conjunction with advanced H 264 video compres sion physically a very small audio video monitoring security module could be easily placed
12. d disk storage used by existing systems increases cost and physical size SoC also performs audio compression and multiplexes the com pressed audio and video together The multiplex compressed audio video is stored on part of USB memory key in a con tinuous loop as shown in FIG 5 At a typical 500 Kbits sec at the output of multiplexer for standard definition video at 30 frames per second we have 5 5 Gigabytes of storage required per day of storage Using a 16 Gigabyte USB memory key could store about three days of storage and 64 Gigabyte USB memory key can store about 11 days of stor age Since the compressed audio video data is stored in a cir cular queue with a linked list pointed by a write pointed as shown in FIG 5 the circular queue has to be unrolled and put in a file format recognizable as one of commonly used PC audio video file formats This could be done when recording is stopped by pressing the record key by doing post process ing by the SoC prior to removal of USB key Such a conver sion could be done quickly and during this time status indi cator LED could flash indicating wait is necessary before USB memory key removal Alternatively this step could be performed on a PC but this would require installing a pro gram for this function on the PC first In networked embodiment of the present invention remote site could request data for a given date and from time T1 to time T2 Such requested data could be sent directly f
13. ess of security video externally Since the surveillance data is stored locally in a small unsuspecting and hard to notice physical module there is significantly less risk of removal of such storage information as in the case of central video surveillance that is accessible and removable of prior art systems Another embodiment of present invention uses power line interface to transfer the surveillance data upon request by a local or remote PC as shown in FIG 7 There are several power line interface standards such as HomePlug AV which transfers data over existing power lines without requiring additional cabling In this case the power supply connection is used to communicate one or more camera modules to a power line module connected to a router that is connected to a local PC or internet As in the 802 11 interface commands could be issued over the power line interface to control each camera module and to access certain audio video clips as desired within the time window of past cyclic storage and video data is only streamed when requested Another embodiment of present invention uses a solar cell and rechargeable battery and a 3G or 4G data wireless trans fer interface This embodiment requires no cabling Applica tion ofthis is not only residences and commercial properties but also traffic light and street corners and other public places Instead of cabling multiple cameras and having to look at plurality of incoming video streams
14. ime upon request by said remote device and for signaling a trigger event to said remote device wherein upon request to transmit said time range of said start time to said stop time requested data is transmitted in a data file format in non real time using TCP IP pro tocol said data file is generated by decompressing video performing temporal and spatial scaling and compressing video at a different data rate in accordance with request and capabilities of a receiving device US 8 780 199 B2 9 wherein said trigger event including but not limited to motion detection causes copying data enveloping said trigger event to a separate file in said removable flash memory and sending said copied data as an attachment to a predefined email address wherein all elements of said apparatus are tightly packed in a single small enclosure and whereby one or more units of the apparatus concurrently capture video surveillance data continuously and store said video surveillance data locally for at least several days of past history and ensure that all evidentiary data are captured and analyzed when occurrence of an event is detected at a later time 7 The apparatus according to claim 6 wherein said power line networking interface uses HomePlug AV standard 8 The apparatus according to claim 6 wherein the appa ratus is packaged in a compact enclosure which is less than 2 inches by 214 inches in size and directly plugged into a power outlet
15. in a video moni toring room only certain cameras are watched and previ ously recorded portions of surveillance could be transferred upon request Furthermore since processing is done at the camera module it is easy to add video facial recognition for certain list of individuals in public places for certain action to be signaled FIG 9 shows the physical size of present invention in one embodiment using a USB memory key The BOM cost of such a system is less than 50 thus such a system could be sold at about 99 and be deployed widely at public places commercial and residential applications FIG 10 shows a physical size of present invention using micro SD card for storage I claim 1 An apparatus for video surveillance system the appara tus comprising at least one camera sensor said at least one camera sensor is configured to capture 30 frames per second at a mini mum of high definition resolution at least one image signal processor coupled to said at least one camera sensor for performing image signal process US 8 780 199 B2 7 ing functions including but not limited to auto white balance auto gain wide angle lens barrel distortion reduction and lens defect compensation a motion adaptive spatial and temporal filtering unit that is coupled to output of said at least one image signal pro cessor for preprocessing of video data at least one video compression unit according to H 264 standard that is coupled to o
16. ing embedded rechargeable battery and 3G or 4G wireless modem for net working FIG 10 shows illustration of audio video security module physical characteristics in one embodiment FIG 11 shows illustration of audio video security module physical characteristics in an embodiment using micro SD card for local storage of surveillance recording in a continu ous loop DETAILED DESCRIPTION In today s world there is a strong need for video security systems that are easy to install to perform continuous video US 8 780 199 B2 3 recording and storage of security video without depending upon external or local network or phone connections at the time of an emergency and without the risk of stored video data being removed by perpetrators In today s technology powerful System on Chip SoC contain all system functions in a programmable manner on a single chip that is smaller than a half inch on each side yet being able to process com plex audio and video processing tasks and system interfaces network interfaces etc all on a single chip Such SoCs are beginning to compete with PC processors by performing and providing multiple processors and multiple hardware accel erators on a single chip but at much lower cost size and power consumption points At the same time the emergence of advanced video processing techniques and advanced video compression standards such as H 264 enable high quality compressed video streams at a 3 4x reduced
17. mote PC for recording Ifthe PC is located locally then it could easily be removed by the perpetrators Furthermore such a system requires con tinuous stream of multiple video streams over local and wide area networks which places a considerably load on such 20 25 30 35 40 45 50 55 60 65 2 networks thus causing unreliable operations and slowing other network activity Cabled systems using Ethernet cabling also require difficult cabling of multiple camera units Units configured to use 802 11 g systems contend bandwidth collisions with other systems cordless phone wireless microwaves and other wireless communication systems on a limited number of channels Thus it becomes difficult and unreliable to transfer plurality of live compressed video stream in real time without interruptions SUMMARY OF PRESENT INVENTION The present invention provides a networked surveillance audio video recorder system for security applications with local storage and continuous record loop The present inven tion does not require continuous streaming of plurality of audio video surveillance channel to a central unit and does not depend on a working network or phone interface at the time of a trigger or intrusion occurrence Evidentiary audio video is locally stored on a non volatile storage media and later streamed in real time upon request of time regions of interest or window around trigger events or for periodic archival
18. o send email messages with some snap shots of video when a alarm trigger occurs However there are many vulnerabilities in such a system If internet is not working at the time of intrusion because phone or internet cables are externally cut then no such email could be send Thief can easily remove or damage the whole security box which removes all security data Another existing video security systems use networked security based where multiple camera units are connected to a PC orlaptop computer over local area network or wide area network as shown in FIG 2 For example 9 wireless camera units can connect to a PC computer using Ethernet wires or 802 11 wireless communication Each camera unit contains video camera video compression and network interface in this case Existing systems use JPEG or MPEG 2 or MPEG 4 systems but in the future this will probably extend to advanced H 264 video compression standard as well in new designs If there is no local computer it is also possible to connect the cameras to a router connected to a WAN gateway so that multiple security video channels could be streamed to aremote PC orlaptop The remote PC orlaptop could perform remote viewing or recording of one or multiple channels on its hard disk storage One of the disadvantage of such a security system is that if internet access deliberately inter rupted at the time of a security event then it is not possible to stream the data for the event to the re
19. of 11 US 8 780 199 B2 POWER 110V AC SUPPLY INPUT AND REGULATORS DRAM Flash Memory Memory CMOS Sensor Ac MVIDEO SoC Processor oW 1 o SE 78 59 f POT RECORD RED GREEN BUTTON STATUS LED REMOVABLE NON VOLATILE STORAGE LOCK KEY ACCESS Figure 3 U S Patent Jul 15 2014 CMOS IMAGE SENSOR CAMERA ISP MOTION ADAPTIVE SPATIAL AND TEMPORAL FILTERING E AUDIO FRONT END Sheet 4 of 11 LENS CORRECTION BARREL amp DEFECT H 264 VIDEO COMPRESSION AUDIO COMPRESSION Figure 4 xcs US 8 780 199 B2 CIRCULAR QUEUE REMOVABLE NON VOLATILE STORAGE U S Patent Jul 15 2014 Sheet 5 of 11 US 8 780 199 B2 UNROLL THIS WAY CURRENT WRITE POINTER AM FILE PC FORMAT COMPATIBLE Figure 5 U S Patent Jul 15 2014 Sheet 6 of 11 US 8 780 199 B2 SELECT REQUESTED CIRCULAR DATE e TO T2 QUEUE AROUND ORIGINAL SGER EV COMPRESSED TRIGGER EVENT OMPRESSE TRANSRATE TRANSRATED ORIGINAL DATA VIDEO DECOMPRESSION TEMPORAL SPATIAL SCALING VIDEO COMPRESSION TEMPORAL SPATIAL SCALED DATA Figure 6 U S Patent Jul 15 2014 Sheet 7 of 11 US 8 780 199 B2 POWER 110V AC SUPPLY INPUT AND REGULATORS DRAM Flash Memory Memory CMOS Sensor amp Lens SoC Processor puzg 3uoJ4 oipny 802 11 USB AIBIGIN WI
20. ory and said camera image sensor said sys tem on a chip processor comprising a camera ISP a hardware unit for lens barrel distortion reduction and lens defect compensation a first hardware accelerator module for motion adaptive spatial and temporal filtering a second hardware video accelerator unit for H 264 video compression at 30 frames per second with vari able bit rate VBR a hardware accelerator for transrating a VBR stream to a different bit rate CBR stream in accordance with available network channel bandwidth and target device display capability a security processor for encryption or decryption of locally stored and transmitted data a processor unit for audio compression an audio and video multiplexing circuit wherein compressed encrypted and multiplexed audio video surveillance data are stored on said removable flash memory using a circular queue said circular queue is configured for storing at least several days of recording wherein a time range from a start time to a stop time of surveillance data is transmitted to a remote device upon request by said remote device or upon occur rence of a trigger event an Internet interface coupled to said system on a chip pro cessor including but not limited to 802 11 wireless inter face 3G wireless data interface 4G wireless interface and a power line networking interface said internet interface is active only for sending data for said start time to said stop t
21. rom compressed data in circular queue as shown in FIG 6 Alter natively stored data could be transrated to match the capa bilities of network channel and or the destination display device For example if the data is to be sent over a 3G or 4G network to a remote personal media player at SD resolution but recorded data is at 720P resolution this requires either transrating or temporal or spatial scaling Transrating requires partial decode of the desired region up to quantiza tion step and changing quantization and performing variable length encode again with the new quantization factor The original data is stored as a variable bit rate VBR in the circular queue since there is no limitation for bit rate peaks for local storage but this could be changed to constant bit rate CBR stream by the transrating for transmitting over a low bandwidth network channel with no ability to handle peak rates of VBR US 8 780 199 B2 5 The requested data could also be sent in a data file format without the need to real time streaming since it is already stored in local storage of the camera module Thus there is no requirement to stream it in real time Transmitting the requested window of data as a data file provides a convenient means to get the data by a remote site over a low bandwidth or unreliable network channel The data could be sent with TCP IP so that any errors are recovered by re request of those portions In contrast prior art s
22. t time to an end time is sent by said processor upon request by a remote device com municating to said Internet interface unit using a H 264 compressed and encrypted audio video data file format wherein in case of a trigger event data enveloping said trigger event is saved and transrated into a lower con stant bit rate before encryption and transmittal to one or more predefined internet destinations wherein upon request to transmit a time range of said start timeto astop time requested data is transmitted in a data file format in non real time using TCP IP protocol said data file is generated by decompressing video perform ing temporal and spatial scaling and compressing video at a different data rate in accordance with request and capabilities of a receiving device wherein all elements of the apparatus are integrated into a single compact unit whereby the apparatus is configured to save evidentiary data locally in said removable non volatile storage media whereby an intruder is prevented from removing said evi dentiary data that is captured and stored on multiple distributed units ofthe apparatus which are hard to reach or remove and image processing and storage of surveillance data collo cated at the apparatus without having to stream data continuously over cabling or wireless in real time thereby power consumption and local bandwidth of transmitted data are significantly reduced because con tinuous streaming of data is
23. utput of said motion adap tive spatial and temporal filtering unit said at least one video compression unit is configured to compress 30 frames per second at a minimum ofhigh definition reso ution in variable bit rate a processor coupled to at least one video compression unit to store compressed data on a removable non volatile semiconductor storage media in a continuous record loop in a circular queue said circular queue is config ured for storing multiple days of storage of surveillance data in accordance with size of said removable non volatile semiconductor storage media before oldest data is overwritten by newly recorded video an encryption unit coupled to said processor wherein said stored compressed data on said removable non volatile semiconductor storage media is configured to be encrypted to allow only people with a security key to access said stored surveillance data an internet interface unit coupled to said processor using an interface including but not limited to 802 11 wireless interface 3G data interface 4G data interface or a power line data interface a transrating unit coupled to said removable non volatile semiconductor storage media using said Internet inter face unit for transmitting said stored surveillance data at a different constant bit rate CBR in accordance with transmit channel and destination capabilities wherein said surveillance data from said circular queue for a time of interest from a star
24. ypted data is described HOAN 9 47 2006 01 Evidentiary audio video is locally stored on a non volatile storage media and later transmitted in accordance with chan 52 U S Cl nel bandwidth with optional temporal spatial or peak signal USPC 348 143 348 148 348 151 348 208 1 to noiseratio PSNR scalability and in accordance to display 348 208 3 348 211 8 capabilities of target viewing device upon request of time 58 Field of Classification Search regions of interest or window around alarm trigger events or USPC 348 143 151 153 208 1 208 3 211 8 See application file for complete search history CMOS IMAGE SENSOR LENS CORRECTION CAMERA ISP BARREL amp DEFECT for periodic archival reasons 14 Claims 11 Drawing Sheets MOTION FILTERING AUDIO FRONT END ADAPTIVE H 264 SPATIAL AND VIDEO TEMPORAL COMPRESSION AUDIO COMPRESSION CIRCULAR QUEUE REMOVABLE NON VOLATILE STORAGE U S Patent Jul 15 2014 Sheet 1 of 11 US 8 780 199 B2 CAMERA SoC PROCESSOR Audio and Video ANALOG VIDEO Compression 60 FT CABLES M U L T l P L E X mx lt gt r vw D amzamram POWER STATUS Prior Art Fig 1 U S Patent Jul 15 2014 Sheet 2 of 11 US 8 780 199 B2 CAMERA UNIT 1 PC OR NM LAPTOP COMPUTER 9 CONTINUOUS VIDEO STREAM CAMERA UNIT 9 Prior Art Fig 2 U S Patent Jul 15 2014 Sheet 3
25. ystems with multiple camera systems have to stream multiple channels of data which cannot be reliably accomplished due to high demand of multiple video streams over a local area wireless network If only one stream from one selected camera is streamed then data from other cameras are permanently lost Ifthe cameras are wired there is still the problem of streaming multiple channels due to limited uplink rate of internet accesses Again either all data is stored in a central location which is subject to removal or some channels of data is permanently lost FIG 7 shows an embodiment where removing the USB memory key is not necessary and access to past surveillance data is transferred using a 802 11 a b g n wireless standard interface that is built in to the camera interface In this case the audio video data is not continuously streamed over wire less interface but it is continuously stored onto local embed ded USB memory key A remote user can connect to a given camera module of present invention and request transfer of surveillance data starting from a time T1 to time T2 on a specified date which is within the window of continuous loop of recording Such requested data is transferred while at the same time continuing to record The data transfer in this case does not have to be in real time because the source data is already stored and thus it could be done over networks with less bandwidth than the recording bandwidth of camera mod ule
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