Intra Prediction Smoothing Control via High-Level Syntax Indicators
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Solution Overview
Problem
Current video coding technologies face challenges in achieving improved compression ratios with minimal sacrifice in picture quality, especially when dealing with limited network resources and the need for efficient storage of video data.
Innovation Solution
The proposed method involves high-level signaling for intra prediction smoothing, using a combination of low-level and high-level indicators to enable or disable intra prediction smoothing mechanisms, and employing interpolation filters such as smoothing reference sample filters and Discrete Cosine Transform Interpolation Filters, to optimize video encoding and decoding processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If intra prediction smoothing mechanisms are applied to improve compression ratio, then compression efficiency is improved, but picture quality may be sacrificed
Solution Approach 1:
The patent implements dynamic control of intra prediction smoothing mechanisms through multi-level high-level syntax indicators that can be adjusted adaptively. The smoothing application is made dynamic by allowing different configurations at sequence, picture, slice, and block levels, enabling the system to optimize between compression ratio and picture quality based on content characteristics and transmission conditions.
Solution Approach 2:
The patent changes parameters of the intra prediction smoothing mechanism through signaling of high-level syntax indicators that control smoothing strength, application scope, and filter characteristics. By modifying these parameters adaptively, the system can improve compression ratio while maintaining picture quality within acceptable ranges.
2Adaptability or versatility
If multiple high-level indicators are signaled to control smoothing mechanisms, then flexibility and adaptability are improved, but signaling overhead and device complexity increase
Solution Approach 1:
The patent segments the control of intra prediction smoothing into multiple hierarchical levels: sequence-level, picture-level, slice-level, and block-level indicators. This segmentation allows different granularities of control to be applied where needed, improving adaptability while distributing the signaling overhead across multiple levels rather than concentrating it at one level.
Solution Approach 2:
The high-level syntax indicators are designed to serve multiple functions: they control smoothing application, indicate smoothing strength, and can imply default behaviors for lower-level indicators. This multi-functionality reduces the total number of separate signaling elements needed, thereby reducing overall device complexity while maintaining control flexibility.
Data Source
AI summary
A method comprising: signaling a set of low-level indicators for a predicted block, wherein each of the indicators of the set enables or disables an intra prediction smoothing mechanism for the predicted block; signaling a first set of high-level indicators on a slice-level or a higher level, wherein each of the high-level indicators of the first set determines signaling for an intra prediction smoothing mechanism which is enabled or disabled by an indicator of the set of low-level indicators; and signaling a second set of high-level indicators, wherein each of the high-level indicators of the second set determines the presence of at least one of the corresponding high-level indicators of the first set, and wherein the values of corresponding high-level indicators of the first set are inferred to be zero when the value signaled by high-level indicator of the second set is zero.