Picture Header Syntax Signaling for Selective Inter and Intra Prediction
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Solution Overview
Problem
The increasing demand for high-resolution, high-quality images/videos, such as 4K and 8K Ultra High Definition, and the growing interest in virtual reality and augmented reality content require more efficient image/video compression techniques to reduce transmission and storage costs while effectively handling diverse image/video characteristics.
Innovation Solution
A method and apparatus for improving image/video coding efficiency by efficiently performing inter prediction and/or intra prediction, omitting unnecessary information, and signaling slice type-related information, including parsing flags for inter and intra prediction operations in the picture header to generate prediction samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high resolution and high quality image/video (4K, 8K UHD) are transmitted and stored, then image/video quality is improved, but transmission and storage costs are increased
Solution Approach 1:
The patent extracts and transmits only the essential syntax elements required for image/video decoding by using flags to indicate the presence or absence of specific information. This selective transmission approach reduces the overall data volume while maintaining the ability to reconstruct high-quality images/videos, thereby addressing the contradiction between quality and transmission cost.
Solution Approach 2:
The patent changes the parameter of information representation by using binary flags (present/absent indicators) to convey syntax element information. This parameter transformation allows the decoder to adaptively process only the necessary information, reducing transmission bandwidth requirements while preserving image/video quality through efficient compression.
2Adaptability or versatility
If all syntax elements are signaled in the picture header, then decoding compatibility is improved, but data transmission volume is increased
Solution Approach 1:
The patent introduces dynamic adaptability in syntax element transmission by using flags that allow the picture header to be configured differently based on the specific picture characteristics and prediction modes. This dynamic approach ensures decoding compatibility is maintained when needed while minimizing data transmission volume by omitting unnecessary syntax elements, thus resolving the contradiction between versatility and data volume.
3Measurement precision
If slice type related information is signaled for all slices, then prediction accuracy is improved, but signaling overhead is increased
Solution Approach 1:
The patent applies local quality by differentiating the signaling approach based on slice characteristics. Slice type information is signaled only where necessary to maintain prediction accuracy, while omitting redundant information in slices where it is not needed. This localized signaling strategy reduces overall signaling overhead while preserving prediction accuracy in critical regions, addressing the contradiction between precision and information loss.
Data Source
AI summary
A video decoding method can comprise the steps of: acquiring image information from a bitstream, the image information including a picture header related to a current picture, and the current picture including a plurality of slices; parsing, from the picture header, a first flag indicating whether information necessary for an inter prediction operation is in the picture header and/or a second flag indicating whether information necessary for an intra prediction operation is in the picture header; parsing, from the picture header, the information necessary for the inter prediction operation and/or the information necessary for the intra prediction operation based on the first flag and/or the second flag; and generating prediction samples based on the information necessary for the inter prediction operation and/or the information necessary for the intra prediction operation.