Multiview Video Reference Picture List Management
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Solution Overview
Problem
Current multiview video signal processing techniques are inefficient in decoding and coding due to inadequate utilization of inter-view dependency and profile information, leading to increased bit transmission and decoding buffer burdens.
Innovation Solution
The method involves defining profile information for stereo videos, using inter-view prediction flags, and generating a reference picture list based on obtained inter-view reference information to optimize decoding and coding efficiency by managing reference pictures effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional multiview video signal processing techniques are used, then decoding and coding processes can be performed, but processing efficiency is insufficient and buffer burden increases
Solution Approach 1:
The patent segments the reference picture list into two separate lists: L0 (temporal references) and L1 (inter-view references). This segmentation allows independent management of temporal and inter-view dependencies, reducing the complexity of managing a unified reference list and improving processing efficiency by enabling specialized handling of each reference type.
Solution Approach 2:
The patent introduces a new dimension for organizing reference pictures by adding view index information to distinguish inter-view references from temporal references. This dimensional separation in the reference picture structure enables more efficient buffer management and reduces the burden on the decoded picture buffer by clearly categorizing reference pictures according to their usage purpose.
2Productivity
If inter-view dependency is not utilized, then decoding can proceed without complexity, but coding efficiency is reduced and bit transmission increases
Solution Approach 1:
The patent performs preliminary classification of reference pictures into inter-view and temporal categories during the reference picture list construction phase. By pre-organizing reference pictures with appropriate view index information and flags before the actual decoding process, the system enables more efficient inter-view prediction and reduces the number of bits required for transmission without compromising decoding accuracy.
Solution Approach 2:
The patent modifies the reference picture list structure by adding view index parameters and inter-view prediction flags to reference picture entries. These parameter changes enable the decoder to efficiently identify and utilize inter-view dependencies, improving coding efficiency by allowing more aggressive compression through inter-view prediction while maintaining accurate reconstruction.
3Speed
If profile information indicating stereo video is not defined, then processing can be simpler, but coding speed is reduced and header information size increases
Solution Approach 1:
The patent defines profile information indicating stereo video characteristics in advance at the sequence or picture parameter level. This preliminary definition allows the decoder to pre-configure inter-view prediction parameters and reference picture list structures based on the declared profile, significantly improving coding speed by avoiding runtime determination while keeping header information compact through standardized profile definitions.
Solution Approach 2:
The patent introduces profile-specific parameters that change based on the declared stereo video profile. By encoding these parameters in a condensed profile format rather than explicitly listing all parameters, the patent reduces header information size while enabling fast decoding through profile-based parameter inheritance and default values, thus improving coding speed without excessive header overhead.
Data Source
AI summary
Disclosed is a method of changing a reference picture list. The present invention includes parsing a profile identifier and a slice type from a multiview video bitstream, obtaining inter-view reference information based on the profile identifier, initializing a reference picture list using the inter-view reference information, and modifying the reference picture list in consideration of the slice type. Accordingly, the present invention defines profile information indicating a stereo video, thereby coding a multiview video signal more efficiently.