Method for storage and retrieval of video from disks
AssigneeScitex Digital Video, Inc.
InventorsJames E. Chargin, Jr., Charles Q. Hoard, Dallas B. Wivholm, Keith A. Merson, Shawn V. A. Carnahan
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Abstract
A television storage system for editing and special effects equipment in which live video input material is recorded and converted into two parallel streams of real time live video with the input video recorded as compressed segments independently accessible on multiple synchronous disk drives.
Claims9
A method of producing a plurality of real time video output signals from input video materials which contain frames of video data at a frame rate, said method comprising:
- (a) compressing frames of an input video signal having the frame rate to generate a compressed input video signal, where the compressed input video signal comprises fewer bytes than the input video signal and has said frame rate,
- (b) dividing the compressed input video signal into a plurality of independent segments by dividing each frame of said compressed input video signal into a predetermined number of segments,
- (c) forming a plurality of series of frame segments with each series in said plurality including like segments of different frames,
- (d) storing the separate series of segments as separately accessible records,
- (e) retrieving a first group of the records,
- (f) recombining the retrieved segments of the first group of the records to produce a first output signal containing a first segment of each of the frames of said compressed input video signal and having said frame rate,
- (g) retrieving a second group of the records concurrently with retrieval of the first group,
- (h) recombining the retrieved segments of the second group of the records to produce a second output signal concurrent with the first output signal, containing a second segment of each of the frames of said compressed input video signal, and having said frame rate, and
- (i) time division multiplexing the first output signal with the second output signal to generate a final output video signal capable of being displayed on a single display screen.
Apparatus for producing a plurality of real time video output signals from input video materials which contain frames of video data at a frame rate, said apparatus comprising:
- means for compressing frames of an input video signal having the frame rate to generate a compressed input video signal, where the compressed input video signal comprises fewer bytes than the input video signal and has said frame rate,
- means for dividing the compressed input video signal into a plurality of independent segments by dividing each frame of the compressed input video signal into a predetermined number of segments,
- means for forming a plurality of series of frame segments with each series in said plurality including like segments of different frames,
- means for simultaneously storing the separate series of segments as separately accessible synchronous records,
- means for simultaneously retrieving a first group of the synchronous records,
- means for recombining the retrieved first group of the synchronous records to produce a first output signal containing a first segment of each of the frames of said compressed input video signal and having said frame rate,
- means for simultaneously retrieving a second group of the synchronous records concurrently with retrieval of the first group, and
- means for recombining the retrieved second group of the synchronous records to produce a second output signal concurrent with the first output signal, containing a second segment of each of the frames of said compressed input video signal, and having said frame rate, and
- means for time division multiplexing the first output signal with the second output signal to generate a final output video signal capable of being displayed on a single display screen.
Dependencies are inferred from the claim text.