Filtered Reference Samples for Accurate Intra Prediction
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Solution Overview
Problem
The increasing demands for high-resolution and high-quality images result in higher data volumes, leading to increased costs for transmission and storage, and existing video compression techniques are inadequate for efficiently encoding and decoding stereographic content.
Innovation Solution
A method and apparatus for rapid intra prediction coding in video signals using filters to enhance encoding/decoding efficiency by reducing errors between original and prediction samples, involving determining an intra prediction mode, applying filters to reference samples, and performing bi-linear interpolation based on weighting values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional video compression techniques are used, then existing standards can be maintained, but encoding/decoding efficiency is insufficient and errors between original and prediction samples remain high
Solution Approach 1:
The patent applies filtering operations to reference samples before they are used in intra prediction, performing preliminary processing to enhance prediction accuracy. The filter processes reference samples in advance to reduce errors between original and prediction samples, improving overall encoding/decoding efficiency.
Solution Approach 2:
The patent introduces a filter as an intermediary component between the reference samples and the prediction process. This filter acts as a mediator that processes reference samples to improve prediction accuracy, thereby resolving the contradiction between encoding efficiency and prediction reliability.
2Measurement precision
If high-resolution and high-quality images are transmitted, then image quality is improved, but data volume increases leading to higher transmission and storage costs
Solution Approach 1:
The patent converts the high data volume associated with high-resolution images into a benefit by applying efficient intra prediction techniques. By improving prediction accuracy through filtering reference samples, the system achieves better compression ratios, allowing high-quality images to be transmitted with reduced data volume.
Solution Approach 2:
The patent changes the parameters of the prediction process by applying filters to reference samples. This parameter change improves prediction accuracy and enables more efficient compression, allowing high-resolution images to be transmitted with lower data volumes and reduced costs.
3Ease of manufacture
If conventional intra prediction is used, then processing is simple, but prediction accuracy is insufficient and encoding efficiency is low
Solution Approach 1:
The patent performs preliminary filtering of reference samples before the prediction process. This preliminary action improves prediction accuracy and encoding efficiency while maintaining relative processing simplicity by using standard filtering operations that can be efficiently implemented.
Data Source
AI summary
According to the present invention, there is provided a method of decoding a video signal, the method including: determining an intra prediction mode of a current block; applying a filter to a first reference sample adjacent to the current block; obtaining a first prediction sample of the current block on the basis of the intra prediction mode and a second reference sample obtained by applying the filter; and obtaining a second prediction sample of the current block using the first prediction sample and the first reference sample.