Reference Picture List Decoding With Reduced Header Signaling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing reference picture specifying and order information in moving image coding schemes are not optimized, leading to redundant transmission and inefficient coding.
Innovation Solution
An image decoding device that derives a reference picture set and generates a reference picture list based on modification information, omitting unnecessary decoding of flags and orders based on the number of available reference pictures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reference picture specifying information and reference picture order information are transmitted in header information, then motion compensation prediction can be performed, but the header information size increases and redundant information is transmitted
Solution Approach 1:
The patent extracts only the necessary reference picture information for motion compensation prediction, omitting redundant flags and order information when not needed. The decoding device derives reference picture sets and generates reference picture lists selectively based on the number of available reference pictures, transmitting only essential data in the header.
Solution Approach 2:
The patent implements dynamic adaptation of header information transmission based on the number of available reference pictures. The coding device adjusts whether to transmit reference picture specifying information and order information according to the actual decoding context, making the header information size flexible rather than fixed.
2Ease of operation
If reference picture specifying information and reference picture order information are transmitted, then decoding can be performed, but the coding amount increases
Solution Approach 1:
The patent extracts and transmits only the minimum necessary information for decoding. When the number of current picture referable pictures is small, the patent omits transmission of reference picture specifying information and order information, reducing the coding amount while maintaining sufficient decoding capability.
Solution Approach 2:
The patent changes the transmission parameters of header information based on the number of available reference pictures. The coding device dynamically adjusts what information to transmit (flags, order information) according to the reference picture set size, optimizing the balance between decoding capability and coding amount.
3Reliability
If all reference picture information is transmitted, then complete reference picture lists can be generated, but redundant information is included
Solution Approach 1:
The patent extracts and transmits only the essential reference picture information needed to generate complete reference picture lists. Redundant flags and order information are omitted when the reference picture set size allows for sufficient reconstruction without them.
Solution Approach 2:
The decoding device derives the reference picture set and generates the reference picture list autonomously based on the transmitted modification information and the number of available reference pictures. The system uses its own derived information to reconstruct the complete reference picture list without requiring all details to be explicitly transmitted.
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.