Pixel interpolation filtering method and device, decoding method and system

Abstract

The embodiment of the invention discloses a pixel interpolation filtering method and a pixel interpolation filtering device, a decoding method and a decoding system, which are used for improving the pixel interpolation filtering efficiency. The method in the embodiment of the invention comprises the following steps of: acquiring a pixel value of an entire pixel of a video signal; performing interpolation filtering on the pixel value of the entire pixel by using a preset one-second pixel interpolation method to obtain the pixel value of a one-second pixel; performing horizontal interpolation filtering and vertical interpolation filtering on a first category of one-eighth pixels according to the pixel value of the entire pixel and the pixel value of the one-second pixel to obtain the pixel values of the first category of one-eighth pixels; and performing oblique interpolation filtering on a second category of one-eighth pixels according to the pixel value of the entire pixel and the pixel value of the one-second pixel to obtain the pixel values of the second category of one-eighth pixels. The embodiment of the invention also provides the pixel interpolation filtering device, the decoding method and the decoding system. The embodiment of the invention can effectively improve the pixel interpolation filtering efficiency.

Description

technical field [0001] The present invention relates to the field of image processing, in particular to a pixel interpolation filtering method and system, a decoding method and system, and a video signal processing method and system. Background technique [0002] In the prior art, a complete video codec system includes an encoder and a decoder. At the encoding end, the video signal first passes through a prediction module, and the encoder selects the best prediction mode from several prediction modes according to certain optimization criteria. One is to generate a predicted signal, and then generate a residual signal according to the difference between the predicted signal and the real signal; the residual signal enters the entropy coding module after transformation and quantization, and finally forms an output code stream. At the decoding end, first analyze the prediction mode information from the code stream to generate a prediction signal that is completely consistent wit...

AI Technical Summary

Problems solved by technology

[0007] However, in the above-mentioned pixel interpolation filtering method, in order to obtain the pixel value of 1 / 8 pixel, it is necessary to calculate the pixel value of 1 / 2 pixel to obtain the pixel value of 1 / 4 pixel, so performing 1 / 8 pixel interpolation filtering requires a lot of effort. The amount of calculation affects the efficiency of pixel interpolation filtering

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