1-D Transform Skip EOB Signaling for Video Transform Blocks
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Solution Overview
Problem
Existing video coding technologies face inefficiencies in signaling and deriving the End of Block (EOB) when one-dimensional transform skip mode is applied, leading to suboptimal compression and increased data requirements.
Innovation Solution
A method for video encoding and decoding that determines whether a one-dimensional transform skip is applied to a transform block based on a syntax element in the video bitstream, and obtains an end position value to retrieve the transform block, facilitating efficient signaling and derivation of EOB.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If one-dimensional transform skip mode is applied, then compression efficiency is improved, but signaling complexity increases due to insufficient EOB representation methods
Solution Approach 1:
The transform block is divided into multiple rows, and the EOB syntax element is segmented to indicate the end position in each row separately rather than using a single EOB value for the entire block. This allows precise tracking of non-zero coefficient positions in 1-D transform skip mode while maintaining efficient coding.
Solution Approach 2:
The patent introduces a new dimension for EOB signaling by adding row-specific EOB indicators to the traditional block-level EOB representation. This dimensional extension enables the decoder to accurately reconstruct the transform block structure in 1-D transform skip mode without requiring complex signaling mechanisms.
2Quantity of substance
If traditional EOB signaling is used, then data requirements are reduced, but derivation accuracy deteriorates in one-dimensional transform skip mode
Solution Approach 1:
Instead of using a uniform EOB signaling approach for the entire transform block, the patent applies local quality by providing separate EOB indicators for different rows. This allows the derivation accuracy to be optimized locally for each row's specific characteristics in 1-D transform skip mode, while the overall data requirements remain controlled through efficient entropy coding of these local indicators.
Data Source
AI summary
Methods, apparatus, and computer readable storage medium for implementation of signaling EOC/EOR. The method includes determining whether a one-dimensional transform skip is applied to a transform block, the transform block having two dimensions; encoding a first syntax element indicating whether the one-dimensional transform skip is applied to the transform block; in response to the one-dimensional transform skip being applied to the transform block, encoding a second syntax element indicating an end position value associated with the transform block, the end position value indicating only one of a horizontal coordinate end position in the transform block and a vertical coordinate end position in the transform block; entropy encoding the transform block; and transmitting a video bitstream comprising the transform block, the first syntax element, and the second syntax element.