Image Processing Apparatus Dynamic Inter Prediction Flag Control
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Solution Overview
Problem
The existing image processing systems, such as those using the HEVC coding system, face a decrease in coding efficiency due to the transmission of redundant inter_4×4_enable_flag information when the size of the smallest coding unit is not 8×8, leading to unnecessary data transmission.
Innovation Solution
An image processing apparatus and method that dynamically control the transmission of inter_4×4_enable_flag based on the size of the smallest coding unit, omitting its transmission when the size is not 8×8, and using a flag to specify whether the smallest size of the inter prediction unit is applied by vertically and horizontally dividing the smallest coding unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inter_4x4_enable_flag is transmitted in the SPS regardless of SCU size, then the flag information is always available for inter prediction control, but redundant information is transmitted when SCU size is not 8x8, decreasing coding efficiency
Solution Approach 1:
The patent changes the transmission parameter (inter_4x4_enable_flag) based on the SCU size parameter. When log2_min_coding_block_size_minus3 is not zero (SCU size is not 8x8), the flag is not transmitted. When log2_min_coding_block_size_minus3 is zero (SCU size is 8x8), the flag is transmitted. This conditional parameter change eliminates redundant information transmission while maintaining necessary flag availability.
Solution Approach 2:
The patent applies different transmission strategies to different SCU size conditions. Instead of uniformly transmitting the flag in all cases, the system locally adapts the transmission behavior based on the specific SCU size configuration, transmitting only when necessary (8x8 SCU) and omitting when not needed (other sizes), thereby optimizing coding efficiency.
2Device complexity
If the smallest coding unit size is increased from 8x8 to larger sizes, then the coding complexity is reduced and processing is simplified, but the inter_4x4_enable_flag becomes redundant and occupies unnecessary bandwidth
Solution Approach 1:
The patent extracts and removes the redundant inter_4x4_enable_flag from the SPS transmission when the SCU size is not 8x8. By detecting the SCU size configuration and selectively extracting the flag only when necessary, the system eliminates redundant information transmission while maintaining the flag when it provides meaningful control functionality.
Data Source
AI summary
The image processing apparatus according to the present disclosure includes a smallest coding unit information obtaining unit that, while a coding unit having a multilayer structure in which a picture of image data is divided into a plurality of pieces is set as a processing unit, in a decoding of coded data obtained by coding the image data, obtains information indicating a size of a smallest coding unit corresponding to the coding unit that is smallest, and a control information obtaining unit that obtains control information for controlling a smallest size of an inter prediction unit corresponding to a processing unit of an inter prediction in accordance with the size of the smallest coding unit indicated by the information obtained by the smallest coding unit information obtaining unit.