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Video content adaptive sub-pixel interpolation method and device

An interpolation method and a technology of video content, applied in digital video signal modification, television, image communication, etc., can solve problems such as high complexity, increased computational complexity, and high computational complexity, and achieve good interpolation fit, The effect of improving efficiency

Active Publication Date: 2008-07-02
ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD
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Problems solved by technology

[0024] (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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  • Video content adaptive sub-pixel interpolation method and device
  • Video content adaptive sub-pixel interpolation method and device
  • Video content adaptive sub-pixel interpolation method and device

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Embodiment Construction

[0057] The method adopted in the present invention suitably reduces the corresponding weight of the pixels seriously deviating from the mean value in the filtering input pixels, and reduces the oscillation effect on the linear filter, thereby improving the fitting degree of the output value. Specifically: according to the correlation determined by the distance between adjacent sub-pixel points, the basic coefficients of the linear filter are given; then the basic coefficients are corrected by a statistical method adaptive to the video content; Target sub-pixel position interpolation.

[0058] Such as figure 1 The five sub-pixels in a, b1, b2, s, m, etc., when they are interpolated, the filter coefficients will change as the video content changes. Among them such as image 3 , Figure 4 and Figure 5 Shown are the schematic diagrams of a sub-pixel interpolation, b1 sub-pixel interpolation and b2 sub-pixel interpolation respectively. Wherein the specific steps of the method...

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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 waiting for the interpolation, the input integer pixels are divided into there classifications and 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, 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 the interpolation result of the sub-pixel position and then output. The method provides by the invention has the advantages of favorable matching degree of motion estimation, high compressibility and the method can achieve the adaptability of the video content.

Description

technical field [0001] 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 [0002] 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 temporal dimension. [0003] 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 inter-frame compression technology refers...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/32H04N19/523H04N19/80
Inventor 袁梓瑾张婷旷开智冯云庆
Owner ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD
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