Intra Prediction Interpolation Filtering for Lower Video Bitrate
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing digital video compression standards face challenges in efficiently managing bandwidth and traffic pressure due to the increasing demand for higher video resolution and quality, necessitating more advanced compression technologies.
Innovation Solution
An intra prediction method based on interpolation filtering is introduced, which determines a filtering coefficient using a filtering window and reconstructed pixel values to perform pixel-by-pixel prediction, enhancing encoding and decoding processes through improved intra prediction techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional intra prediction methods are used, then encoding simplicity is maintained, but prediction accuracy and bandwidth efficiency deteriorate
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the filtering window size (e.g., 3×3, 5×5, 7×7) and selecting different filtering coefficients based on the characteristics of the current block and reference pixels. This allows the prediction process to adapt to different block types and content characteristics, improving prediction accuracy while managing encoding complexity through conditional selection.
Solution Approach 2:
The patent introduces dynamic elements by making the filtering window size and coefficient selection variable rather than fixed. The encoder dynamically determines the appropriate filtering parameters based on block characteristics, and the decoder dynamically applies the selected filtering operation, enabling adaptive prediction that responds to different video content scenarios.
2Manufacturing precision
If higher video resolution is demanded, then video quality is improved, but bandwidth and traffic pressure increase
Solution Approach 1:
The patent introduces an interpolation filtering mechanism as an intermediary process between reference pixel extraction and final prediction. This intermediary filtering step refines the prediction by smoothly interpolating between reference pixels, reducing prediction errors and residual energy, which ultimately decreases the bitrate required to encode high-resolution video while maintaining quality.
3Measurement precision
If spatial redundancy is utilized, then prediction accuracy is improved, but calculation complexity increases
Solution Approach 1:
The patent applies local quality by performing pixel-by-pixel prediction where each pixel within the current block is predicted using locally adapted filtering parameters. Different pixels may use different filtering window sizes and coefficients based on their local characteristics, allowing the system to exploit spatial redundancy locally while avoiding the need for complex global optimization.
Data Source
Figure 1A~1B
Figure 1C~2
Figure 3~5C
AI summary
An intra frame prediction method and apparatus based on interpolation filtering, a video encoding method and apparatus, a video decoding method and apparatus, and a system. The intra prediction method based on interpolation filtering comprises: during the intra prediction process of video encoding and decoding, determining, according to a filtering window of the current block and reconstruction values of pixel points in a reconstruction region adjacent to the current block, a filtering coefficient which is used when interpolation filtering is performed on the current block; and performing point-by-point prediction on the pixel points in the current block according to the filtering window and the filtering coefficient, so as to obtain a predicted block of the current block. In the embodiments of the present disclosure, a predicted block of the current block is obtained using the current block and the spatial redundancy of a reconstruction region adjacent thereto, such that the encoding performance can be improved.