Video Decoding Slice Type Signaling for Compression Efficiency
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Solution Overview
Problem
The increasing demand for high resolution and high quality images/videos, such as 4K and 8K Ultra High Definition, poses a challenge due to the higher amount of information required for transmission and storage, leading to increased costs and inefficiencies in existing wired/wireless broadband lines and storage media.
Innovation Solution
A method and apparatus for improving image/video coding efficiency by efficiently performing inter prediction and/or intra prediction, and by efficiently signaling slice type related information during image/video transmission, thereby omitting unnecessary signaling for inter prediction and/or intra prediction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high resolution and high quality image/video (4K, 8K UHD) are transmitted and stored using existing wired/wireless broadband lines and storage media, then image/video quality is improved, but transmission and storage costs are increased
Solution Approach 1:
The picture is divided into multiple slices, and each slice is further divided into multiple blocks. This segmentation allows selective application of prediction modes and optimized coding strategies for different regions, improving compression efficiency while maintaining high quality
Solution Approach 2:
The patent dynamically selects between intra prediction and inter prediction modes based on slice type and block characteristics. The prediction mode is adaptively chosen to optimize compression performance for different content types and regions within the image/video
2Reliability
If all information necessary for inter prediction operation is signaled in the picture header for all slices, then decoding accuracy is improved, but signaling overhead is increased
Solution Approach 1:
Different signaling strategies are applied to different slice types. The picture header contains slice type information that determines which prediction modes are available in each slice. This local adaptation reduces signaling overhead by only including necessary information for each specific slice type rather than universally signaling all inter prediction information
Data Source
AI summary
A video decoding method performed by a video decoding apparatus, according to the present document, comprises the steps of: obtaining image information from a bitstream, wherein the image information includes a picture header associated with a current picture, and the current picture includes a plurality of slices; parsing at least one of a first flag and a second flag from the picture header; generating prediction samples by performing at least one of intra prediction and inter prediction on a current block in the current picture on the basis of at least one of the first flag and the second flag; generating reconstructed samples on the basis of the prediction samples; and generating a reconstructed picture on the basis of the reconstructed samples.