Video Predictive Encoding Pixel Block Segmentation
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Solution Overview
Problem
Current video encoding technologies do not fully utilize the correlation between pixels within a frame, leading to lower compression efficiency, especially for frames with complex texture information, as they rely on intra-frame prediction methods that fail to accurately predict pixels far from the prediction pixel, resulting in larger prediction residuals.
Innovation Solution
A method and device for video predictive encoding that divides a pixel block into a principal set and a complementary set, encodes the principal set, interpolates the reconstructed values to predict the complementary set, and combines them to improve prediction accuracy and reduce residuals, thereby enhancing compression efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If intra-frame prediction is used for I frame encoding, then encoding complexity is reduced, but compression efficiency deteriorates
Solution Approach 1:
The pixel block is divided into a principal set of pixels and a complementary set of pixels. The principal set is encoded using conventional intra-frame prediction methods, while the complementary set is predicted by interpolating reconstructed values from the principal set. This segmentation allows the system to leverage both prediction accuracy and correlation utilization to improve compression efficiency while maintaining manageable complexity.
2Device complexity
If simple airspace prediction algorithm is used, then device complexity is reduced, but prediction residual increases
Solution Approach 1:
The reconstructed values from the principal set of pixels serve as an intermediary to predict the complementary set of pixels. By interpolating these reconstructed values, the system achieves more accurate predictions without requiring complex prediction algorithms, thus reducing prediction residual while maintaining algorithm simplicity.
3Productivity
If direction prediction algorithm is used, then compression efficiency of I frame is improved, but prediction residual within frame increases for blocks with complicated texture information
Solution Approach 1:
The method differentiates between the principal set of pixels (encoded using direction prediction for efficiency) and the complementary set of pixels (predicted through interpolation for accuracy). This local differentiation allows the system to optimize both compression efficiency and prediction precision, particularly for blocks with complicated texture information where accurate prediction is crucial.
4Productivity
If inter-frame prediction is used for P frame and B frame, then compression efficiency is improved, but time complexity increases
Solution Approach 1:
The pixel block is segmented into principal and complementary sets, allowing the system to use interpolation-based prediction for the complementary set, which reduces the search complexity compared to full inter-frame prediction while still achieving improved compression efficiency through correlation utilization.
Data Source
AI summary
The invention provides a method and device for video predictive encoding.