Multi-frame motion extrapolation from a compressed video source
A video and motion vector technology, applied in the direction of digital video signal modification, television, electrical components, etc., can solve the problems of high application, interrupt processing flow conditional logic, etc.
Inactive Publication Date: 2010-02-03
DOLBY LAB LICENSING CORP
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Problems solved by technology
Some system implementations incorporate processing hardware with pipelined architectures to achieve higher processing power at lower cost, but even these lower costs are still too high for many applications
Several optimization techniques have been proposed to reduce the computational demands of block matching, but these techniques are not as effective as hoped because they require conditional logic that interrupts the processing flow in processors with pipelined architectures
Method used
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[0024] A. Introduction
[0025] figure 1 is a schematic block diagram of an exemplary system 10 incorporating aspects of the present invention that obtains "new" motion vectors from "original" motion vectors already present in an encoded video data stream. A motion vector processor (MVP) 2 receives the video information transmitted in the encoded video data stream from signal channel 1, analyzes the original motion vectors present in the data stream to obtain new motion vectors not present in the data stream, and converts the new motion vectors into The vector is passed along channel 3, and the original motion vector can also be passed along channel 3 if desired. A video signal processor (VSP) 4 receives the encoded video data stream from channel 1, receives the new motion vector from channel 3, receives the original motion vector from either channel 1 or channel 3, and performs an operation on at least some of the video information conveyed in the encoded video data stream. ...
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Motion vectors are important to many video signal processing techniques that are applied to video data streams such as MPEG 2 compliant video data streams. The performance of these techniques can often be improved if larger numbers of motion vectors are available. Two techniques are disclosed that may be used to derive a significant number of additional motion vectors from the original motion vectors that exist in an encoded video data stream. A motion vector reversal technique derives new motion vectors representing motion in directions opposite to that represented by original motion vectors.A vector tracing technique derives new motion vectors from combinations of original motion vectors.
Description
technical field [0001] The present invention relates generally to video signal processing, and more particularly to signal processing for obtaining information about apparent motion in an image represented by a sequence of frames or pictures of video data in a video signal . Background technique [0002] Various video signal processing applications rely on the ability to detect apparent motion in an image represented by a sequence of frames or pictures in a video signal. Two examples of these applications are data compression and noise reduction. [0003] Some forms of data compression rely on the ability to detect motion between two pictures or two frames so that a corresponding portion of inter-coded video data, or relative to data in another frame, can be used to represent a Data of at least a portion of the frame data more efficiently represents a frame of video data. An example of video data compression using motion detection is MPEG-2 compression, described in Inter...
Claims
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IPC IPC(8): H04N7/26H04N7/46H04N7/36
CPCH04N19/00781H04N7/26829H04N19/00727H04N19/00721H04N7/2684H04N19/00715H04N7/366H04N7/462H04N19/00684H04N7/26765H04N19/0066H04N19/00678H04N19/00587H04N19/00648H04N7/26856H04N19/56H04N19/513H04N19/61H04N19/553H04N19/57H04N19/573H04N19/58H04N19/577
Inventor R·W·韦伯
Owner DOLBY LAB LICENSING CORP