Output-Layer Image Decoding for Efficient CVSS Access Units
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Solution Overview
Problem
The increasing demand for high-resolution and high-quality images leads to increased transmission and storage costs due to the higher amount of information required, necessitating a more efficient image compression technique.
Innovation Solution
The method and apparatus handle Coded Video Sequence Start (CVSS) Access Units (AUs) by including only a picture unit (PU) for an output layer, avoiding layer step-wise output and improving coding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If PUs of all layers are included in CVSS AU, then layer completeness is maintained, but device complexity and processing overhead increase
Solution Approach 1:
The patent extracts only the necessary PU (picture unit) from the layered structure, specifically including only the PU for the output layer in CVSS AU, while excluding PUs of other layers. This extraction principle reduces the complexity of CVSS AU structure while maintaining the essential functionality needed for video decoding.
2Productivity
If only PU for output layer is included in CVSS AU, then coding efficiency improves, but adaptability to multi-layer scenarios decreases
Solution Approach 1:
The patent introduces dynamic adaptability by allowing the decoder to flexibly handle different scenarios: when a CVSS AU contains only output layer PU, the decoder operates in optimized mode for coding efficiency; when multi-layer PUs are present in subsequent AUs, the decoder adapts to process them appropriately. This dynamic approach maintains coding efficiency while preserving adaptability to various multi-layer configurations.
Data Source
AI summary
An image decoding method performed by a decoding device according to the present disclosure is characterized by comprising the steps of: acquiring a bitstream for a Coded Video Sequence (CVS) including a Coded Video Sequence Start (CVSS) Access Unit (AU); deriving image information about the current picture of the CVSS AU on the basis of the bitstream; and decoding the current picture on the basis of the image information, wherein the CVSS AU only includes a Picture Unit (PU) for an independent layer of the bitstream.