Image Decoding Order Switching for Circuit Complexity Reduction
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Solution Overview
Problem
Existing image coding methods, such as those in the HEVC standard, face inefficiencies due to the need for adaptive processing orders and increased circuit complexity, which decreases coding efficiency and requires additional information in the bitstream.
Innovation Solution
An image coding and decoding method that switches between fixed and adaptive processing orders based on information included in the coded moving picture, allowing for reduced circuit complexity and increased coding efficiency by omitting unnecessary information in the bitstream.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If adaptive processing order is used in HEVC decoding, then coding efficiency can be improved for certain cases, but circuit complexity increases and additional information is required in the bitstream
Solution Approach 1:
The patent implements dynamic switching between fixed and adaptive processing orders based on the presence of a flag in the bitstream. The decoding apparatus determines whether to use adaptive processing order by checking this flag, allowing the system to adapt its complexity level dynamically rather than always using the most complex method. This resolves the contradiction by enabling high efficiency only when necessary while maintaining simplicity for other cases.
2Adaptability or versatility
If adaptive processing order is implemented, then decoding flexibility is improved, but additional information must be included in the bitstream increasing data volume
Solution Approach 1:
The patent extracts only the essential flag information needed to determine processing order from the bitstream, rather than including complete processing order information. This minimal information extraction approach provides the necessary decoding flexibility while minimizing the additional data volume required in the bitstream.
3Ease of manufacture
If fixed processing order is used, then circuit complexity is reduced and compatibility is improved, but coding efficiency decreases for cases requiring adaptive order
Solution Approach 1:
The patent creates a universal decoding apparatus that can handle both fixed and adaptive processing orders through a single unified structure. The decoding unit is designed to function in multiple modes depending on the flag value, eliminating the need for separate dedicated circuits for each processing order type. This maintains circuit simplicity while enabling high efficiency when needed.
Data Source
AI summary
An image decoding method for decoding a coded moving picture includes: switching a decoding order to either a fixed processing order or an adaptive processing order based on first information included in the coded moving picture; and decoding image data items included in the coded moving picture according to the decoding order switched to.