Intra Picture Motion Compensation Using Temporary Pixel Padding
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Solution Overview
Problem
Current video coding standards face inefficiencies in motion compensation when dealing with intra pictures, as they lack the ability to use the currently processing picture as a reference, leading to suboptimal prediction and increased computational complexity.
Innovation Solution
The current picture is utilized as a reference for motion compensation by padding unknown pixels with temporary values, allowing it to be treated similarly to other reference pictures, thereby enhancing prediction efficiency and simplifying the decoding process without requiring additional memory or complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If motion compensation is performed between two different pictures as defined in existing video coding standards, then temporal redundancy is removed, but intra pictures cannot use motion compensation and require less efficient intra prediction
Solution Approach 1:
The patent enables the current picture to serve dual functions: as the picture being decoded and as a reference picture for motion compensation. This allows intra pictures to utilize motion compensation techniques previously reserved for inter pictures, improving coding efficiency while maintaining standard compatibility.
Solution Approach 2:
The patent performs preliminary decoding and padding of the current picture before motion compensation is applied. By temporarily completing the decoding process and filling unknown pixels with padding values, the current picture becomes available as a reference picture, enabling subsequent motion compensation operations without requiring additional reference pictures.
2Measurement precision
If the current picture is used as a reference picture for motion compensation, then prediction efficiency is improved, but unknown pixels need to be padded with temporary values
Solution Approach 1:
The patent introduces padding values as intermediary temporary data to represent unknown pixels in the current picture. These padding values act as placeholders that enable motion compensation to proceed without requiring actual pixel values, allowing the process to use the current picture as reference while managing the complexity of incomplete data.
Solution Approach 2:
The patent segments the decoding process into distinct phases: preliminary decoding with padding, motion compensation using the padded current picture, and final refinement. This segmentation allows each phase to focus on specific tasks, improving prediction accuracy while managing complexity through structured processing steps.
3Productivity
If intra prediction is used for intra pictures as required by current standards, then no additional reference pictures are needed, but coding efficiency is much lower than motion compensation
Solution Approach 1:
The patent merges the advantages of intra prediction (no additional reference pictures needed) with motion compensation (higher coding efficiency). By allowing the current picture to serve as its own reference picture, the patent combines the self-containment of intra prediction with the predictive power of motion compensation, achieving both coding efficiency and decoding simplicity.
Data Source
AI summary
Digital pictures may be encoded by padding all un-processed pixels within a currently processing picture with temporary pixel values; searching the picture for a matching section for use as a reference in pixel reconstruction of a section of the picture independent of whether the picture is intra-coded or inter-coded; and using the matching section to perform pixel prediction on the section to generate one or more predicted pixels for the section.