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Video data compaction coding method

A video data, compression coding technology, which is applied in the field of video and multimedia data processing, can solve the problems of area segmentation and object segmentation algorithms, such as the complex scope of application, and achieve the effect of scalability

Inactive Publication Date: 2007-02-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of complex and narrow application range in the area segmentation and object segmentation algorithms in computer vision, and to provide a video data compression encoding method

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0135] The example of accompanying drawing (8) adopts the vector representation method shown in accompanying drawing (2). Under the situation of retaining the same amount of data, accompanying drawing (8) provides the peak signal-to-noise ratio (PSNR) mean value of all image frames of reconstruction video of two kinds of residual data processing methods (method among the present invention and DCT method) Comparison. Below in conjunction with the method of the present invention describe in detail the concrete steps that this example implements, as follows:

[0136] (1) Each frame of residual image is expressed as:

[0137] Frame = y _ vectors ∈ R D × N , ...

Embodiment 2

[0148] The example of accompanying drawing (9) adopts the vector representation method shown in accompanying drawing (3). Under the situation of retaining the same amount of data, accompanying drawing (9) has provided the peak signal-to-noise ratio (PSNR) mean value of all image frames of reconstruction video of two kinds of residual data processing methods (method among the present invention and DCT method) Comparison. Below in conjunction with the method of the present invention describe in detail the concrete steps that this example implements, as follows:

[0149] (1) Express a group of continuous residual images with the vector representation method shown in accompanying drawing (3):

[0150] GOP = y _ vectors ∈ R D × ...

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Abstract

The invention relates to a compression coding method of video data. Wherein, the original image sequence of video via motion forecast and compensation obtains residual error; projecting residual error into vector space; then using main component analysis algorism to reduce the dimensions of vector; using wide main component analysis algorism to group the factor with reduced dimensions; using main component analysis algorism to reduce the dimensions of factor more; the output of video compressed code is the base of linear space generated in said process, the factor of vector in main component analysis, the average vector of vector group and the motion vector of motion forecast, etc. The invention has better compression efficiency on the video data, and the rebuilt video has better image quality. And the invention loses the unimportant base vector and factor of linear space to expand the signal / noise ratio of video data, therefore, the rebuilt video with less left data can own better effect.

Description

technical field [0001] The invention relates to the field of video and multimedia data processing, in particular to a video data compression encoding method. Background technique [0002] Video coding frameworks all have similar functional modules, such as motion prediction for eliminating temporal redundancy, transform for eliminating spatial redundancy, quantization for controlling bit rate, and entropy coding for reducing statistical redundancy. Block-based prediction and transform coding (i.e., hybrid coding) has become the mainstream of video compression coding, and motion prediction compensation and discrete cosine transform (DCT) are widely used in various coding standards, such as MPEG, ITU-T and H. 264 / AVC. H.264's complex motion prediction technology makes its video compression efficiency higher than all previous standards. Its motion prediction technology allows multiple block sizes and multiple prediction modes, eliminating most of the inter-frame redundancy an...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/32H04N19/132H04N19/186H04N19/60
Inventor 庄越挺姚蕾吴飞刘健
Owner ZHEJIANG UNIV
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