Syntax Interleaving for Separate Coding Tree in Video Coding
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Solution Overview
Problem
Higher resolution video formats increase computational complexity and buffer requirements in video coding, making existing block partition and syntax signalling techniques inefficient.
Innovation Solution
The method involves partitioning input data into initial blocks using inferred splitting without split-syntax signalling, determining a partition structure for luma and chroma blocks, and signalling or parsing associated syntaxes to optimize coding tree sharing or non-sharing, allowing for flexible block partitioning and reduced complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If higher resolution video formats are used, then video quality is improved, but computational complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the video data into separate luma and chroma components that can be processed independently through separate coding trees. This allows the encoding system to handle high-resolution video by processing different color components separately, reducing the computational burden on each processing path while maintaining overall video quality.
2Manufacturing precision
If higher resolution video formats are used, then video quality is improved, but buffer requirements increase
Solution Approach 1:
The patent segments the video data into separate luma and chroma coding trees, allowing independent processing and buffering of different color components. This segmentation reduces the total buffer requirements by enabling the system to process and discard chroma data separately from luma data, rather than requiring buffers for the complete high-resolution video frame at once.
3Adaptability or versatility
If separate coding trees are used for luma and chroma, then flexibility in block partitioning is improved, but syntax signalling complexity increases
Solution Approach 1:
The patent applies preliminary action by establishing a default coding tree structure that is shared between luma and chroma components. This default structure is determined in advance, and only when separate coding is actually needed are additional syntax elements signaled to deviate from the default. This approach reduces syntax signaling complexity by minimizing the need to explicitly signal every partitioning decision.
Solution Approach 2:
The patent implements local quality by allowing separate coding trees to be applied selectively to specific regions or blocks where chroma and luma partitioning differ, while maintaining shared coding trees in regions where they are identical. This selective application of separate coding reduces overall syntax signaling complexity while preserving the flexibility benefits where needed.
4Device complexity
If inferred splitting without split-syntax signalling is used, then computational complexity is reduced, but partitioning precision may be affected
Solution Approach 1:
The patent applies parameter changes by using inferred splitting based on block size parameters and coding context rather than explicit syntax signaling. The partitioning decisions are derived from changing parameters such as block dimensions, prediction mode, and regional characteristics, allowing the system to achieve adequate partitioning precision through parameter-based inference rather than exhaustive explicit signaling.
Data Source
AI summary
A method and apparatus of video coding operate by receiving input data associated with a current data unit in a current picture, wherein the current data unit includes a luma component and a chroma component and the current data unit includes a luma data unit and a chroma data unit. The operation proceeds by splitting the luma data unit and the Chroma data unit using one shared tree until the luma data unit and the chroma data unit reach a stop node, encoding or decoding the stop node as a leaf CU (coding unit) if the stop node is greater than M×N for the luma component, M and N are positive integers, and signalling or parsing a prediction mode for the stop node if the stop node is smaller than or equal to M×N for the luma component.