Reference Down-Sampling Filters for Low-Bitrate Motion Compensation
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Solution Overview
Problem
Existing video coding technologies face challenges in efficiently compressing high-definition (HD) videos, leading to high bandwidth requirements and storage demands, particularly in video monitoring applications.
Innovation Solution
A computer-implemented method and system for performing motion compensation interpolation with reference resampling, which applies a band-pass filter to a reference picture with different resolutions to generate a reference block, and processes a block of the target picture using this reference block.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If video compression is applied to reduce storage memory and transmission bandwidth, then bandwidth and storage requirements are reduced, but video quality deteriorates
Solution Approach 1:
The patent applies different filtering operations based on the resolution relationship between reference picture and target picture. When reference picture has higher resolution, a low-pass filter is applied followed by up-sampling; when target picture has higher resolution, a band-pass filter is applied followed by down-sampling. This parameter-based approach optimizes the balance between compression efficiency and quality preservation.
Solution Approach 2:
The patent introduces filtering operations as intermediary steps between the reference picture and target picture processing. The low-pass filter and band-pass filter act as mediators that prepare the reference picture for efficient motion compensation interpolation, enabling better compression while maintaining quality through controlled frequency domain manipulation.
2Productivity
If motion compensation interpolation is performed with reference down-sampling, then video coding efficiency is improved and bitrate is reduced, but processing complexity increases
Solution Approach 1:
The patent segments the filtering process into distinct stages: first applying the band-pass filter to the reference picture, then performing motion compensation interpolation with reference down-sampling. This segmentation allows each operation to be optimized independently, improving overall efficiency while managing computational complexity through structured processing steps.
Solution Approach 2:
The patent uses a band-pass filter with specific frequency characteristics that selectively processes only the necessary frequency components for motion compensation. This partial action approach focuses computational resources on the most important frequency bands, improving coding efficiency while avoiding the excessive complexity of processing all frequency components.
Data Source
AI summary
The present disclosure provides systems and methods for processing video content using motion compensation interpolation. The methods include: encoding or decoding a picture block by applying one or more filters to a reference picture, wherein the applying of the one or more filters generates a sample at a fractional sample position, and wherein the one or more filters comprise an 8-tap filter that has a plurality of coefficients [p0, p1, . . . , p7] for each 1/16 fractional sample position p.