Reference Picture List Decoding With Reduced Header Signaling
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Solution Overview
Problem
The existing moving image coding schemes inefficiently transmit reference picture specifying and order information without considering the number of available reference pictures, leading to redundant data transmission.
Innovation Solution
An image decoding device and coding device that derive a reference picture set and generate a reference picture list based on modification information, omitting unnecessary decoding of certain information based on the number of current picture referable pictures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If reference picture specifying information and reference picture order information are transmitted in header information without considering the number of available reference pictures, then the reference picture list can be fully configured, but redundant data transmission occurs and header information size increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the reference picture list configuration based on the number of available reference pictures. When the number of referable pictures is small (e.g., 1 or 2), the patent omits certain ordering information from the header, thereby changing the parameter of information transmission to eliminate redundancy while maintaining adequate reference picture list configuration for inter prediction.
2Ease of operation
If all reference picture order information is transmitted regardless of the number of referable pictures, then complete reference picture list control is achieved, but header information coding amount increases
Solution Approach 1:
The patent applies partial action by transmitting only the necessary reference picture order information based on the number of referable pictures. Instead of always transmitting complete ordering information for all reference pictures, the patent transmits partial information (or omitted information) when the number of referable pictures is small, thereby reducing the quantity of header information while maintaining sufficient control for the actual prediction operation.
Data Source
AI summary
A reference picture information decoding unit (13) omits decoding of a reference list sorting presence or absence flag and/or a reference list sorting order based on the number of current picture referable pictures.