Image Decoder Access Unit Multiplexing for 4:0:0 Color Components
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing AVC standard faces challenges in encoding and decoding images with a 4:4:4 format, where three color components are encoded independently, making it difficult to achieve random access reproduction and editing processing in picture units due to the inability to set uniform time information and use a uniform encoding mode across components.
Innovation Solution
The method involves multiplexing encoded data from each color component with a parameter indicating its corresponding component in the bit stream, allowing for the inclusion of data from all components in one access unit and using a uniform encoding mode, which enables easy random access reproduction and editing by including a parameter like colour_id in the slice header or NAL unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If encoding processing is independently performed for each color component using the 4:0:0 format, then parallel processing is possible, but it is impossible to set the same time information and use a uniform encoding mode among the respective color components
Solution Approach 1:
The patent divides the color image into separate color components (R, G, B) and encodes them independently as separate monochrome images using the 4:0:0 format. This segmentation enables parallel processing of each color component while maintaining the ability to set uniform time information through the access unit structure that groups corresponding blocks from different color components together.
2Productivity
If three color components are encoded by the 4:0:0 format using the present AVC system, then independent processing is possible, but one picture is constituted by three access units making it impossible to easily extract data for one picture
Solution Approach 1:
The patent introduces an access unit as an intermediary structure that contains blocks from multiple color components. The access unit delimiter acts as a marker to identify the boundaries of complete picture data across all color components, enabling easy extraction of full picture data by detecting these delimiters even though processing is done independently for each component.
3Ease of operation
If data of three color components are included in one macro-block and processed in order, then uniform encoding mode is used, but parallel processing is not possible
Solution Approach 1:
The patent segments the color image into separate color components and processes them independently in parallel. The access unit structure then reassembles corresponding blocks from different color components to maintain uniform encoding mode application across all components, achieving both parallel processing and uniform encoding through this two-stage approach.
4Ease of operation
If access unit delimiters are arranged in boundaries of respective pictures, then independent and easy extraction of one access unit is possible, but this structure cannot accommodate independently encoded color components in one picture
Solution Approach 1:
The patent extends the access unit concept to serve multiple functions: it can contain blocks from a single color component or from multiple color components (R, G, B). The access unit delimiter universally marks the boundaries of complete picture data regardless of how many color components are involved, making the structure adaptable to both traditional and independent color component encoding scenarios.
Data Source
AI summary
The present invention makes it possible to include, when encoding processing is applied to three color components using a 4:0:0 format, data for one picture in one access unit and makes it possible to set the same time information or the same set encoding modes among the respective color components. In an image encoding system for applying compression processing to an input image signal including a plurality of color components, encoded data obtained by independently subjecting an input image signal of each of the color components to encoding processing and a parameter indicating which color component the encoded data corresponds to are multiplexed with a bit stream. In an image decoding system for inputting a bit stream in which an image signal including a plurality of color components is compressed to perform decoding processing, decoding processing of the encoded data of each of the color components is performed using a parameter indicating which color component the encoded data corresponds to.