Intra Prediction Filtering for Stereographic Video Decoding
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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 do not efficiently address the needs of stereographic image 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.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional image compression techniques are used, then existing methods can be applied, but they do not efficiently address the needs of stereographic image content and high-resolution images
Solution Approach 1:
The patent applies different filtering operations to different reference samples based on their spatial position and relationship to the current block. Specifically, it applies a first filter to generate a first filtered reference sample and a second filter to generate a second filtered reference sample, where the filters are selected based on the intra prediction mode and the position of reference samples relative to the current block. This local differentiation of filter application optimizes the prediction quality for stereographic content while maintaining efficiency.
2Measurement precision
If filters are applied to reference samples to improve prediction accuracy, then errors between original and prediction samples are reduced, but processing time increases
Solution Approach 1:
The patent performs filtering operations on reference samples before they are used for prediction. The first and second filters are applied to reference samples in advance to generate filtered reference samples that will be used in subsequent prediction steps. This preliminary filtering action improves prediction accuracy by pre-processing the reference data, reducing the need for more complex operations during the actual prediction phase.
Solution Approach 2:
The patent dynamically selects which filters to apply based on the intra prediction mode and the position of reference samples. The filtering operation is not applied uniformly but is adapted according to the specific prediction scenario. This dynamic approach allows the system to maintain high prediction accuracy for stereographic content while avoiding unnecessary filtering operations that would increase processing time for simpler cases.
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.