Video Decoder Offset Parameter Acquisition Using View Disparity
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Solution Overview
Problem
Current video signal processing techniques face inefficiencies in coding, particularly in handling multiview video signals, where spatial, temporal, and inter-view redundancies are not adequately addressed, leading to suboptimal compression and decoding performance.
Innovation Solution
The method involves acquiring an offset parameter for a current block using an offset parameter from a reference block in a different view, considering disparity between views and determining the application of a sample adaptive offset, utilizing reference view merge information to ensure accurate offset parameter acquisition and application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If offset parameter is acquired from reference block in reference view, then coding efficiency is improved, but view disparity between reference view and current view is not considered
Solution Approach 1:
The patent modifies the offset parameter acquisition process by introducing view disparity compensation. Instead of directly copying the offset parameter from the reference view, the system adjusts the parameter based on the disparity between reference view and current view, thereby maintaining coding efficiency while improving accuracy.
Solution Approach 2:
The patent introduces an intermediate processing step between acquiring the offset parameter from the reference view and applying it to the current block. This intermediary process involves calculating view disparity and using it to adjust the offset parameter, ensuring both efficiency and accuracy.
2Measurement precision
If sample adaptive offset is applied to current block, then decoding accuracy is improved, but computational complexity increases
Solution Approach 1:
The patent applies sample adaptive offset selectively based on local characteristics of the current block. By determining whether to apply the offset based on specific conditions and using an identical adaptive offset region, the system improves decoding accuracy where needed while avoiding unnecessary computations in regions where it is not required.
3Speed
If offset parameter is acquired without considering view disparity, then processing speed is maintained, but offset parameter correctness deteriorates
Solution Approach 1:
The patent performs preliminary calculation of view disparity before acquiring the offset parameter from the reference view. By having the disparity information ready in advance, the system can quickly adjust the offset parameter without adding significant processing delay, thus maintaining processing speed while improving correctness.
Data Source
AI summary
The present invention relates to a method for processing a video signal and a video decoder, wherein an offset parameter of a reference block is acquired, an offset parameter of a current block is acquired by using the offset parameter of the reference block, an adaptive parameter is applied to the current block by using the offset parameter of the current block, and the reference block is a block in a different view point from the current block. According to the present invention, an accurate adaptive parameter can be applied to the current block by using an offset parameter of a reference view point in consideration of a difference between view points when obtaining the offset parameter of the current block.