Segmented-Block Motion Vectors for Video Encoding
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Solution Overview
Problem
Current video encoding methods face limitations in achieving high compression ratios while maintaining fidelity, particularly due to constraints on the number of macroblocks that can be referenced for motion-vector encoding, leading to less efficient encoding schemes when suitable motion-vector encoding is not possible.
Innovation Solution
The method involves segmenting video-frame blocks and using segmented-block motion vectors that include references to a segmentation-defining region and sources of intensity-and-color data for each segment, allowing for flexible segmentation-based encoding without sacrificing coding efficiencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional motion-vector-based encoding is used with constraints on the number of referenced macroblocks, then device complexity is reduced, but compression ratio deteriorates
Solution Approach 1:
The macroblock is divided into multiple segments, each of which can reference different source macroblocks for motion compensation. This segmentation allows the encoder to selectively choose the best reference for each segment, improving compression efficiency without requiring a complete increase in system complexity.
Solution Approach 2:
Different segments within the macroblock are allowed to have different reference macroblocks and motion vectors, enabling local optimization of encoding quality. Each segment can be encoded with the most appropriate reference, improving overall compression ratio while maintaining manageable complexity through localized processing.
2Adaptability or versatility
If the number of referenced macroblocks is increased to improve motion-vector encoding flexibility, then encoding flexibility improves, but device complexity increases
Solution Approach 1:
By segmenting the macroblock into multiple regions, the system achieves encoding flexibility through selective reference selection for each segment, rather than increasing the overall number of referenced macroblocks system-wide. This localized approach provides adaptability without proportionally increasing system complexity.
Solution Approach 2:
The patent implements local quality by allowing different segments to use different reference macroblocks and motion compensation strategies. This provides encoding flexibility at the segment level while maintaining system complexity at a manageable level through modular, localized processing.
3Manufacturing precision
If multiple references for intensity-and-color data are used, then video fidelity is improved, but loss of information decreases (compression efficiency improves)
Solution Approach 1:
The macroblock is segmented into multiple regions, each referencing different source macroblocks for intensity and color data. This segmentation enables multiple references to be used within a single macroblock, improving video fidelity by selecting the best reference for each segment while improving compression efficiency by reducing redundancy.
Solution Approach 2:
Different segments can use different reference macroblocks and motion compensation parameters, allowing local optimization of both fidelity and compression. Each segment is encoded with the most appropriate reference, improving overall video quality and compression efficiency simultaneously.
Data Source
AI summary
The current application is directed to flexible methods for motion-vector-based encoding of macroblocks within video frames. The flexible methods for encoding video-frame macroblocks provide for segmentation of a video-frame block and encoding the segmented video-frame block by a segmented-block motion vector that includes a reference to a segmentation-defining region of a segmentation map and that also includes references to sources of intensity-and-color data for each segment. Segmented-block motion vectors provide for flexible segmentation-based encoding of video-frame blocks without sacrificing the coding efficiencies attendant with conventional motion-vector-based video encoding.