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Method of self-adaptive interpolation filtering calculation in video coding

A technology of interpolation filtering and video coding, which is applied in the field of adaptive interpolation filtering calculations, can solve problems such as high coding complexity and increased coding complexity, and achieve the effect of reducing routine operations and reducing computational complexity

Active Publication Date: 2011-05-11
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the process of implementing the present invention, the inventors found that the addition of additional video frame-level encoding operations in the prior art will significantly increase the complexity of encoding
In this video frame-level multi-encoding structure, there are a large number of approximate repeated operations, such as searching, transforming, and quantizing the entire pixel position, which makes the encoding complexity higher.

Method used

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  • Method of self-adaptive interpolation filtering calculation in video coding
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  • Method of self-adaptive interpolation filtering calculation in video coding

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Embodiment 1

[0015] Such as figure 1 As shown, the embodiment of the present invention provides a method for adaptive interpolation filtering calculation in video coding, including:

[0016] 101: Perform pre-encoding processing on the current video image, and record the result of the pre-encoding processing.

[0017] Specifically, the recorded pre-encoding results include: the reference frame number in the encoding process, the integer pixel position and sub-pixel position of the image block in the corresponding reference frame, the integer pixel position of each encoded image block and the corresponding reference frame The local cross-correlation of the image block, and the local autocorrelation of the image block at the integer pixel position in the corresponding reference frame.

[0018] 102: Perform cyclic iterative processing on the video image according to the pre-encoding processing result, and stop the iterative processing until a preset iterative stop condition is satisfied.

[...

Embodiment 2

[0023] In order to reduce the computational complexity of video frame-level encoding, an embodiment of the present invention provides a method for adaptive interpolation filter calculation in video encoding. The embodiment of the present invention adopts the fast iterative processing method for secondary encoding, which makes full use of the property that the reference block corresponding to the integer pixel position of each video coded image block in the reference frame is basically unchanged during each iterative processing process, and eliminates the Unnecessary integer pixel position search, transformation, quantization and other operations in each iteration reduce the computational complexity of encoding.

[0024] see figure 2 The method for adaptive interpolation filter calculation in video coding provided by the embodiment of the present invention is specifically applied in the video coding process, and includes the following steps: a pre-coding stage, an iterative pr...

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Abstract

The invention discloses a method of self-adaptive interpolation filtering calculation in video coding. The method comprises the following steps: carrying out precoding processing on a current video image, and recording the result of the precoding processing; according to the result of the precoding processing, carrying out circular iterative processing on the video image till iterative processingis stopped when the preset iterative stopping conditions are met; and acquiring a new interpolation filter obtained by calculation when the iterative processing is stopped, and using the new interpolation filter to carry out secondary coding on the video image. By precoding processing, iterative processing and secondary coding processing, the embodiment of the invention reduces the conventional operations carried out on the whole pixel position in the process of every iterative process, thus reducing calculating complexity of the video coding.

Description

technical field [0001] The invention relates to the field of video compression coding, in particular to a method for adaptive interpolation filter calculation in video coding. Background technique [0002] The video coding method of hybrid coding structure adopted in various video coding standards at present usually uses four compression coding techniques of prediction, transformation, quantization and information entropy coding. Among them, the predictive coding technology is to predict and describe the currently coded video image block by using the video image block that has been coded and reconstructed. According to the relationship between the video image block that has been encoded and reconstructed and the video image block currently being encoded, the predictive coding technology can be divided into inter-frame prediction and intra-frame prediction. The image block predicts the image block being encoded in the current frame, and the intra-frame prediction uses the en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N7/50H04N19/117H04N19/192H04N19/587H04N19/85
Inventor 戴琼海魏宇平
Owner TSINGHUA UNIV
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