Video content adaptive sub-pixel interpolation method and device

Abstract

The invention discloses a method for interpolating sub-pixels of adaptive video content, which includes the steps: (1) according to the distance between an input integer pixel position and a sub-pixel position to be interpolated, the input integer pixels are divided into three classifications to obtain basic coefficient; (2) according to the distance between an input integer pixel value and an interpolating-filtering weighted mean this time, the basic coefficient is corrected; (3) the corrected basic coefficient and the target sub-pixel position are interpolated and filtered. The invention also relates to a device for interpolating the sub-pixels of the adaptive video content to realize the method and the device comprises a filtering coefficient generator, an interpolating filter and a memory for storing interpolation result of the sub-pixel position. An input sub-pixel position and an integer pixel matrix enter into the filtering coefficient generator so that the filtering coefficient is generated; the coefficient and the input integer pixel matrix are input into the interpolating filter to execute interpolating and filtering; output result is stored in the memory for storing theinterpolation result of the sub-pixel position and then is outputted. The method for interpolating the sub-pixels of the adaptive video content has the advantages of favorable matching degree of motion estimation, high compressibility and can achieve the adaptability of the video content.

Description

Video content adaptive sub-pixel interpolation method and device technical field The invention relates to an interpolation method, in particular to a video content adaptive sub-pixel interpolation method; in addition, the invention also relates to a video content adaptive sub-pixel interpolation device for realizing the above method. Background technique Digital video consumes a large amount of storage and transmission capacity. Generally speaking, video compression technology achieves the goal of digital video bit rate by compressing information redundancy in two dimensions of space and time. The inter-frame coding compression technique refers to the previous frame and the following frame to compress and encode the predicted frame, thereby eliminating the redundancy in the time dimension. In block-based video codec systems, engineers use compression coding techniques to reduce the bit rate of digital video, and decompression is the inverse process of compression. The in...

AI Technical Summary

Problems solved by technology

(3) For the interpolation of a quarter of the sub-pixel a, the computational complexity increases sharply

nearly 6 times more complex

In some implementations, it is necessary to calculate twice from the vertical direction and the horizontal direction, and the computational complexity is nearly 12 times more

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