Compression-Aware Graphics Layout for Video Artifact Reduction
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Solution Overview
Problem
Combined media data, such as video and graphical overlays, often exhibit increased compression artifacts at the borders where different media types adjoin due to disparities in content and motion, leading to blurring and distortions during compression and rendering.
Innovation Solution
A compression-aware alignment technique is employed to reposition graphical elements within known macro-blocks of the compression technique, ensuring that media types do not adjoin within the same compression region, thereby reducing or eliminating compression artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If compression is applied to combined media data, then the amount of media data is reduced, but compression artifacts increase at borders where different media types adjoin
Solution Approach 1:
The patent applies preliminary alignment of graphical elements with video data borders before compression occurs. By positioning graphical elements so their edges align with macroblock boundaries in advance, the compression process processes each media type uniformly within its own macroblocks, preventing the generation of compression artifacts at transition regions.
Solution Approach 2:
The patent applies different compression handling to different regions of the combined media. By ensuring graphical elements align with macroblock boundaries, each media type (video and graphics) is compressed within its own dedicated macroblocks with consistent compression parameters, rather than having compression parameters change at arbitrary graphical element boundaries.
2Adaptability or versatility
If graphical elements are inserted into media data for customization, then media data can be customized with logos and additional information, but compression artifacts increase at the borders of graphical elements
Solution Approach 1:
The system performs preliminary positioning of graphical elements during the authoring or playback process, aligning them with the underlying video macroblock structure before compression. This ensures that when compression occurs, graphical elements do not create abrupt transitions within macroblocks, thereby maintaining customization capability while eliminating border artifacts.
3Adaptability or versatility
If media types are combined without alignment consideration, then customization is achieved, but blurring and distortions occur during compression and rendering
Solution Approach 1:
The patent implements preliminary alignment of graphical overlays with the video macroblock grid during composition, ensuring that graphical elements are positioned at locations that align with the compression structure. This pre-alignment prevents blurring and distortions by ensuring uniform compression handling of each media type within its own macroblocks.
Data Source
AI summary
An embodiment provides a method, including: identifying a first type of media and a second type of media; determining a compression technique to be used to compress a combined media created from the first type of media and the second type of media; and aligning using a processor, based on the compression technique determined, the first type of media and the second type of media to create the combined media. Other aspects are described and claimed.