Digital video recording system
First Claim
1. A digital video recording system comprising:
- a camera directed at a scene of interest to view the scene and generate frames of video images thereof at a predetermined frame rate, each of said frames of video image comprising a plurality of pixel elements;
a converter configured to convert each frame of video image produced by said camera to a digital signal;
a memory configured to store digital signals;
a processor configured to process said digital signal by comparing portions of said video image represented by said digital signal with corresponding portions from a previously established reference of the scene to determine if any changes have occurred therein, said processor configured to compress and store those portions of said video signal which differ from a corresponding portion of said reference in said memory; and
, playback means accessing said memory to retrieve the contents of said digital signals and recreate the video images produced by said camera, said playback means accessing said memory at any desired memory location representing a time of interest so as not to have to scan the video images to locate a video image of interest, and said playback means accessing said memory without interrupting said processors processing digital signals representing currently acquired video images.
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0 Petitions
Accused Products
Abstract
A digital video recording system (10) includes a video camera (12) directed at a scene of interest to continuously view the scene and generate video images (F) of the scene at a predetermined frame rate. A frame grabber (16) converts the images to digital signal (vd). A processor (14) processes the signals, comparing the video image represented by a digital signal with a previously established reference (Fr) of the scene to determine if changes have occurred. The processor has a memory (20) in which contents of each digital signal are stored, together with the time and date information as to when the image was acquired. A video playback capability (30) allows the memory to be accessed to retrieve the contents of digital signals so video images produced by the camera can be recreated. The playback system enables the memory to be accessed at any desired date and time location so an image of interest can be reviewed without having to scan video images in a date/time sequence. Accessing the memory is done without interrupting the processor'"'"'s processing of digital signals for currently acquired video images.
59 Citations
16 Claims
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1. A digital video recording system comprising:
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a camera directed at a scene of interest to view the scene and generate frames of video images thereof at a predetermined frame rate, each of said frames of video image comprising a plurality of pixel elements;
a converter configured to convert each frame of video image produced by said camera to a digital signal;
a memory configured to store digital signals;
a processor configured to process said digital signal by comparing portions of said video image represented by said digital signal with corresponding portions from a previously established reference of the scene to determine if any changes have occurred therein, said processor configured to compress and store those portions of said video signal which differ from a corresponding portion of said reference in said memory; and
,playback means accessing said memory to retrieve the contents of said digital signals and recreate the video images produced by said camera, said playback means accessing said memory at any desired memory location representing a time of interest so as not to have to scan the video images to locate a video image of interest, and said playback means accessing said memory without interrupting said processors processing digital signals representing currently acquired video images. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of recording video images and storing and retrieving the same comprising:
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viewing a scene of interest with a camera and generating video images thereof;
converting each frame of video imagery produced by said camera to a digital signal;
processing said digital signal, said processing including comparing portions of the video image represented by a digital signal with corresponding portions in a previously established reference of the scene to determine if any changes have occurred therein, and storing the changed portions of the video image represented by said digital signals in a memory in association with date and time data; and
,accessing said memory to retrieve said digital signals to recreate the video images produced by said camera, said memory being accessed to retrieve said video images simultaneously with digital signals being stored therein, and said memory being accessed at any desired location representing an associated time of interest whereby video images stored in said memory do not need to be sequentially scanned to locate a video image of interest. - View Dependent Claims (13, 14, 15, 16)
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Specification