Slice Header Signaling for Deriving Tile Count in Video Decoding
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Solution Overview
Problem
Existing video coding technologies face challenges in efficiently compressing video data for transmission and storage, particularly in scenarios with limited bandwidth and memory resources, while maintaining high picture quality.
Innovation Solution
The method and apparatus utilize the presence of a picture header structure in the slice header to control the presence of slice addresses and the number of tiles in a slice, enhancing compression efficiency by deriving the number of tiles from the slice header under specific conditions, and reconstructing slices using this information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If video data is compressed using existing coding technologies, then the quantity of data needed to represent digital video images is decreased, but the compression efficiency is insufficient to meet the demands of higher video quality with limited bandwidth and memory resources
Solution Approach 1:
The patent extracts and removes redundant syntax elements from the slice header structure in video bitstreams. Specifically, it eliminates unnecessary signaling of slice address and number of tiles in slice when these can be derived from existing picture header structures, thereby reducing the quantity of compression data without compromising video quality reconstruction
Solution Approach 2:
The patent makes the picture header structure serve multiple functions by enabling it to control the presence of slice-level syntax elements. The picture header structure is utilized not only for picture-level parameters but also to govern slice header content, reducing overall bitstream complexity and improving compression efficiency
2Reliability
If more syntax elements are signaled in the slice header to provide detailed slice information, then the reliability of slice reconstruction is improved, but the compression efficiency deteriorates due to increased data overhead
Solution Approach 1:
The patent enables the decoder to self-derive slice reconstruction parameters (slice address and number of tiles) from the picture header structure without requiring explicit signaling in the slice header. The slice header structure serves itself by utilizing information already present in the picture header, eliminating redundant data transmission while maintaining reconstruction reliability
Data Source
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AI summary
A method of decoding of a picture from a video bitstream implemented by a decoding device, the bitstream including a slice header of a current slice and data representing the current slice, the method comprising: obtaining a parameter used to derive the number of tiles in the current slice from the slice header, in case that a condition is satisfied, wherein the condition comprises: the slice address of the current slice is not the address of the last tile in the picture where the current slice located; reconstructing the current slice using the number of tiles in the current slice and the data representing the current slice.