Picture Header Fixed Location Coding for Video Compression
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Solution Overview
Problem
The increasing demand for high resolution and high quality images/videos, such as 4K or 8K Ultra High Definition, poses challenges in efficient compression, transmission, and storage due to the higher amount of information required, especially in existing wired/wireless broadband lines and legacy storage mediums.
Innovation Solution
The proposed method enhances video/image coding efficiency by signaling information related to a reference picture list, picture header, and picture parameter set ID, using a fixed location relative to the starting point of the picture header, and coding this information efficiently, such as using 6 bits for the picture parameter set ID.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high resolution and high quality image/video data are transmitted or stored using existing wired/wireless broadband lines or legacy storage mediums, then image/video quality is improved, but transmission and storage costs are increased
Solution Approach 1:
The patent extracts only the essential picture header information (non-reference picture flag and picture parameter set ID) and places it at a fixed location in the bitstream, separate from the full picture data. This allows receivers to quickly identify and process critical metadata without handling the entire high-resolution video stream, reducing transmission bandwidth requirements and storage needs while maintaining image/video quality.
Solution Approach 2:
The patent segments the picture header information into specific critical elements (non-reference picture flag at bits 0-1 and picture parameter set ID at bits 2-7) and positions them at a fixed location. This segmentation allows for efficient targeted transmission and processing of only the necessary control information, separating it from the bulk picture data to reduce overall transmission and storage costs.
2Measurement precision
If comprehensive picture header information is transmitted for high resolution images/videos, then decoding accuracy is improved, but data transmission volume is increased
Solution Approach 1:
The patent extracts only the essential picture header information (non-reference picture flag and picture parameter set ID) and places it at a fixed location in the bitstream, separate from the full picture data. This allows receivers to quickly identify and process critical metadata without handling the entire high-resolution video stream, reducing transmission bandwidth requirements and storage needs while maintaining image/video quality.
Solution Approach 2:
The patent transmits only the partial but sufficient picture header information needed for proper decoding (6 bits for picture parameter set ID is sufficient for most cases). This partial transmission provides adequate decoding accuracy without the excessive transmission volume that would result from sending complete picture header data, achieving the right balance between decoding quality and data efficiency.
3Adaptability or versatility
If variable length coding is used for picture parameter set ID, then coding flexibility is improved, but decoding complexity is increased
Solution Approach 1:
The patent performs preliminary action by allocating a fixed 6-bit field for the picture parameter set ID at a predetermined location in the bitstream. This preliminary allocation simplifies the decoding process by eliminating the need for variable length parsing, while still providing sufficient coding flexibility (6 bits can represent up to 64 different picture parameter sets) for most practical applications.
Solution Approach 2:
The patent changes the parameter representation from variable length to fixed length (6 bits). This parameter change maintains adequate flexibility for representing different picture parameter sets while significantly reducing decoding complexity, as fixed-length fields can be processed more efficiently by decoders without requiring adaptive parsing logic.
Data Source
AI summary
According to the disclosure of the present document, image information acquired through a bitstream may include a picture header including information related to a reference picture list, the picture header may include a non-reference picture flag related to whether a current picture is not used as a reference picture, and the non-reference picture flag may be included in a fixed location relative to a starting point of the picture header in the picture header. As a result, it is possible to derive the effect of enhancing prediction performance and coding efficiency in a video/image coding.