Intra Prediction Using Base Pixel Variations for Directional Texture
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Solution Overview
Problem
High-resolution and high-quality video data requires efficient compression techniques to manage increased information amounts, leading to higher transfer and storage costs, and existing methods struggle with effective intra prediction, especially in textures with directionality and variations in pixel values.
Innovation Solution
An intra prediction method that generates reference pixels based on variations from neighboring blocks, using base pixels and applying pixel value variations to predict pixel values, particularly for diagonal and non-diagonal pixels in the prediction block, enhancing prediction efficiency through interpolation or extrapolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional intra prediction methods are used, then encoding/decoding simplicity is maintained, but prediction accuracy deteriorates for textures with directionality and pixel value variations
Solution Approach 1:
The patent changes the parameters used for prediction by introducing base pixel selection and pixel value variation calculations. Instead of using fixed reference pixel methods, the patent dynamically selects base pixels from neighboring blocks and calculates variations in pixel values to improve prediction accuracy for textures with directionality and pixel value variations.
Solution Approach 2:
The patent segments the prediction process into distinct steps: selecting base pixels from neighboring blocks, calculating pixel value variations, and applying these variations to generate predicted pixel values. This segmentation allows for more precise handling of different texture characteristics while maintaining a structured encoding/decoding process.
2Measurement precision
If high-resolution and high-quality video data is used, then image quality is improved, but transfer and storage costs increase
Solution Approach 1:
The patent changes how pixel values are represented and transmitted by encoding only the base pixel values and their variations rather than transmitting all pixel values explicitly. This parameter-based approach reduces the data amount required to represent high-resolution and high-quality video while maintaining image quality through accurate reconstruction using the variation information.
Data Source
AI summary
The present invention relates to a method and apparatus for intra prediction. The intra prediction method for a decoder, according to the present invention, comprises the steps of entropy-decoding a received bitstream, generating reference pixels to be used in the intra prediction of a prediction unit; generating a prediction block from the reference pixels on the basis of a prediction mode for the prediction unit and reconstructing an image from the prediction block and a residual block, which is obtained as a result of entropy encoding, wherein the reference pixels and/or the prediction block pixels are predicted on the basis of a base pixel, and the predicted pixel value can be the sum of the pixel value of the base pixel and the difference between the pixel values of the base pixel and the generated pixel.