Spatial Merge Mode for HEVC Video Coding Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In video compression, especially with High Efficiency Video Coding (HEVC), the efficient representation of object motion is challenging due to the need for many bits to describe arbitrary object shapes, leading to reduced coding efficiency, particularly when motion information varies among pixels in the same object.
Innovation Solution
The implementation of a spatial merge mode that allows a current block to merge with spatially-located neighboring blocks, sharing the same motion parameters, eliminating the need to code and transmit motion parameters for each individual block, and determining the merging direction based on motion vector differences without using additional bits, flags, or indexes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If motion parameters are coded for each individual block, then motion information accuracy is improved, but coding efficiency deteriorates due to increased bit consumption
Solution Approach 1:
The patent merges spatially adjacent blocks that share the same motion parameters into a single coding unit. Instead of encoding motion parameters for each individual block, the encoder identifies regions where neighboring blocks have identical or similar motion characteristics and combines them into one block, thereby reducing the total number of motion parameters that need to be transmitted while maintaining motion representation accuracy.
Solution Approach 2:
The patent creates a universal motion parameter set that can be applied across multiple blocks within a merged region. By determining a single motion parameter for a group of blocks rather than individual parameters for each block, the solution achieves multi-functionality where one parameter set serves multiple blocks, reducing redundancy and improving coding efficiency.
2Productivity
If blocks are merged to share motion parameters, then coding efficiency is improved, but motion information precision deteriorates due to loss of individual block motion details
Solution Approach 1:
The patent applies local quality by allowing different regions of the video frame to have different merging strategies. Blocks with similar motion characteristics are merged, while blocks with distinct motion patterns remain separate. This ensures that motion information precision is maintained in regions where it is needed while achieving compression in regions where motion is uniform.
Solution Approach 2:
The patent introduces dynamic block merging where the decision to merge or separate blocks is made adaptively based on the actual motion content of each region. The encoder evaluates motion vectors and characteristics of neighboring blocks dynamically to determine the optimal merging configuration, allowing the system to adapt to varying motion patterns throughout the frame.
3Quantity of substance
If spatial merge mode is implemented without additional bits, flags or indexes, then bit-rate overhead is reduced, but decoder complexity increases due to need for motion vector difference analysis
Solution Approach 1:
The patent implements self-service by enabling the decoder to automatically determine merge mode decisions through motion vector difference analysis without requiring explicit signaling from the encoder. The decoder independently evaluates the motion characteristics of neighboring blocks and makes merging decisions based on predefined criteria, eliminating the need for additional bits, flags, or indexes while distributing the computational workload to the decoder.
Data Source
AI summary
In one embodiment, a spatial merge mode for a block of video content may be used in merging motion parameters. Spatial merge parameters are considered and do not require utilization of bits or flags or indexing to signal at the encoder or decoder. If the spatial merge mode is determined, the method merges the block of video content with a spatially-located block, where merging shares motion parameters between the spatially-located block and the block of video content.