Video Subsection Encoding for Mosquito Noise Reduction
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Solution Overview
Problem
Current video compression methods result in noticeable mosquito noise artifacts when different compression/decompression methods are used within a video frame, leading to visual distortion across adjacent subsections, particularly in large TVs where these artifacts become more apparent.
Innovation Solution
A dual pass encoding process that filters and compresses surrounding video subsections using a primary method, decompresses, and then re-compresses the center subsection using a secondary method, capturing and smoothing out the noise distortion to create a more uniform visual experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If different compression methods are used for different video subsections to achieve high compression efficiency, then compression effectiveness is improved, but mosquito noise artifacts and visual distortion increase
Solution Approach 1:
The patent applies different compression methods (intra and inter encoding) to different subsections of the video frame based on local characteristics. The center subsection uses one compression method while surrounding subsections use another, optimizing compression efficiency for each region while managing artifact visibility through localized processing.
Solution Approach 2:
The patent captures mosquito noise artifacts generated by the first compression method and uses them as input for a second compression pass. By treating the artifacts as useful information rather than pure noise, the system smooths out visual distortions while maintaining compression efficiency, converting harmful artifacts into beneficial reference data.
2Object-affected harmful factors
If intra encoding is used to refresh video sequences and reduce artifacts, then visual quality is improved, but compression efficiency decreases due to larger data size
Solution Approach 1:
The patent divides the video frame into different subsections (center and surrounding areas) and applies different compression strategies to each. This segmentation allows selective use of intra and inter encoding methods, balancing artifact reduction in critical regions with compression efficiency in other regions.
Solution Approach 2:
Instead of applying intra encoding to the entire frame (which would guarantee artifact reduction but sacrifice compression efficiency), the patent applies it only to the center subsection. This partial action approach achieves sufficient artifact reduction in the most important area while maintaining overall compression efficiency.
3Productivity
If inter encoding is used to leverage temporal redundancy, then compression efficiency is improved, but mosquito noise artifacts increase at frame boundaries
Solution Approach 1:
The patent applies inter encoding to surrounding subsections where temporal redundancy is most beneficial for compression, while using intra encoding for the center subsection where artifact visibility is most problematic. This localized application of different methods optimizes the trade-off between compression efficiency and artifact reduction in different spatial regions.
Data Source
AI summary
At lease a computer program product is provided for efficiently encoding or decoding a video frame. The computer program product when executed by one or more processors configures the one or more processors to compress or encode the different video subsections within the video frame with different compression methods. The visual artifact is reduced between the different video subsections encoded or compressed with the different compression methods within the video frame.