Slice Skip Mode Signaling in Scalable Video Coding
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Solution Overview
Problem
Existing digital video compression technologies face inefficiencies in coding multiple layer video signals, particularly in inferring and skipping slices between enhancement and base layer pictures, which affects coding efficiency and scalability.
Innovation Solution
The method involves signaling a slice skip mode in a multiple layer scalable coding system by correlating corresponding regions of video signals across layers, using up-sampling filter design for spatial scalability, and indicating the skip of an enhancement layer slice or picture in the slice header or network abstraction layer unit header, allowing efficient inference and reconstruction of skipped slices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If slice skip mode signaling is implemented in multiple layer video coding, then coding efficiency is improved, but device complexity increases
Solution Approach 1:
The patent extracts and removes redundant slice data transmission by identifying slices in enhancement layers that can be inferred from base layer pictures. Instead of encoding and transmitting all slice information, the system extracts only the necessary skip mode indicators and reference picture information, eliminating unnecessary data transmission while maintaining decoding accuracy.
Solution Approach 2:
The patent performs preliminary identification and marking of skippable slices during the encoding phase by comparing enhancement layer slices with their corresponding base layer regions. The encoder pre-determines which slices can be skipped and inserts appropriate signaling information, so that the decoder can directly reconstruct these slices without receiving full encoding data, thereby improving coding efficiency.
2Loss of substance
If slice skip mode is signaled in slice header, then information transmission is reduced, but signaling overhead increases
Solution Approach 1:
The patent applies local quality signaling by inserting slice skip mode indicators only in the slice headers of enhancement layer pictures where skipping is applicable, rather than using global signaling for the entire picture or video sequence. This localized approach ensures that skip mode information is provided only where needed, minimizing unnecessary signaling overhead while maintaining efficient transmission.
Solution Approach 2:
The patent uses copying by referencing base layer picture data to reconstruct enhancement layer slices. Instead of transmitting full enhancement layer slice data, the system copies relevant information from base layer pictures and uses inter-layer prediction to reconstruct the skipped slices, significantly reducing the amount of data that needs to be transmitted.
3Manufacturing precision
If inter-layer processing techniques are used, then video quality is enhanced, but processing complexity increases
Solution Approach 1:
The patent segments the video coding process into distinct layers (base layer and enhancement layer) and processes each layer separately with specific operations. The base layer is decoded first, then enhancement layer slices are processed by comparing with base layer regions to identify skip modes. This segmentation allows complex inter-layer processing to be broken down into manageable steps, reducing overall processing complexity.
Solution Approach 2:
The patent applies partial action by performing inter-layer prediction and comparison operations only for slices that can benefit from skip mode, rather than processing all slices uniformly. The system selectively applies complex inter-layer processing techniques only where they improve video quality, leaving other slices to be processed with simpler methods, thereby balancing quality enhancement with processing complexity.
Data Source
AI summary
Methods and apparatus may be used to signal slice skip mode of a multiple layer scalable coding system. A correlation between the corresponding regions of video signals in multiple layers and inter-layer processing techniques may make it possible to infer a slice or picture in the enhancement layer from the corresponding region in a base layer picture. Accordingly, a video stream may be encoded to indicate that an enhancement layer slice or picture may be skipped.