HEVC Decoding Apparatus Dynamic Minimum Compression Rate Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The HEVC system lacks the ability to adaptively adjust the compression rate of a coded stream to its lowest limit, leading to inefficiencies in bit rate management and limitations in generating coded streams with higher bit rates necessary for applications like visually lossless compression.
Innovation Solution
A decoding and coding apparatus that adjusts the compression rate of a coded stream by setting the lowest compression rate for each tier in units of blocks recursively divided, using identification data to calculate and adjust the minimum compression rate and maximum bit rate, allowing for flexible bit rate management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the HEVC system uses fixed MinCr values for each tier, then decoding complexity is controlled, but adaptability to different compression rate requirements is lost
Solution Approach 1:
The patent applies dynamics by making the minimum compression rate (MinCr) adjustable rather than fixed. The decoding apparatus can dynamically change MinCr values based on identification data in the coded stream, allowing the system to adapt to different compression rate requirements while maintaining controlled decoding complexity through the hierarchical tier structure.
Solution Approach 2:
The patent implements parameter changes by modifying the MinCr parameter based on identification data. The system can change the minimum compression rate parameter to generate coded streams with different bit rates, enabling adaptability to various application requirements such as visually lossless compression while preserving the original HEVC complexity control mechanism.
2Manufacturing precision
If the compression rate is increased to achieve visually lossless compression, then image quality improves, but bit rate consumption increases
Solution Approach 1:
The patent enables dynamic adjustment of the minimum compression rate parameter, allowing the system to select appropriate compression levels based on quality requirements. For visually lossless compression applications, the system can set higher MinCr values to preserve image quality, while for other applications, lower MinCr values can reduce bit rate consumption.
Data Source
AI summary
The present disclosure relates to a decoding apparatus and a decoding method and a coding apparatus and a coding method capable of adjusting a compression rate of a lowest limit. A decoding unit decodes a bit stream coded according to an H.265/HEVC standard having a profile in which a lowest compression rate at the time of coding an image is set for each of a main tier and a high tier in units of Coding Units (CU) that are recursively divided. The present disclosure, for example, can be applied to a decoding apparatus of an High Efficiency Video Coding (HEVC) system and the like.