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Method and device for space stage compression

A technology of compression method and compression device, which is applied in TV, electrical components, digital video signal modification, etc., can solve the problems such as noise cannot be removed, and achieve the effect of reducing the number and reducing the transmission bit rate

Inactive Publication Date: 2005-06-15
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The existing spatial hierarchical compression scheme still has some defects in the accuracy of image analysis. For example, in this scheme, some noise in the video stream will be given a higher gain value, so that the noise cannot be removed.

Method used

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  • Method and device for space stage compression
  • Method and device for space stage compression

Examples

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Embodiment Construction

[0022] figure 2 It is a schematic diagram of a coding system adopting a spatial layered compression scheme with an image edge detection and analysis function according to an embodiment of the present invention. The encoding system includes an elementary stream generating device 110, which is used to encode a high-resolution video stream after down-sampling, thereby obtaining an elementary stream, which is a low-resolution stream; a reconstructed stream obtaining device 122, It is used to decode and up-sample the basic stream to obtain a reconstructed stream, which is a high-resolution stream; a residual stream obtaining device 132 is used to compare the video stream with the reconstructed stream , to obtain a residual stream, which is a high-resolution stream; an edge analysis device 140, configured to perform edge detection and analysis on the high-resolution stream, to obtain each image in the high-resolution stream the gain value of the prime point; and an enhanced stream...

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Abstract

The method includes steps: first, after descending sampling video steam, carrying out encoding so as to obtain a basis steam; next, decoding and ascending sampling the said basis steam so as to obtain a rebuilding stream; subtracting the rebuilding stream from video steam so as to obtain a residue stream; then, carrying out edge detection analysis for the said video steam so as to obtain gain value of each pixel in the said video stream; finally, multiplying the said residue stream by gain value, and encoding the multiplied result so as to obtain a enhanced stream. The invention subdivides type of each pixel in order to obtain more accurate gain value. Thus, under precondition of ensuring image quality, the invention reduces quantity of transferred data further as well as reduces rate of transmission code needed by enhanced layer.

Description

technical field [0001] The present invention relates to a video compression method and device, in particular to a video compression method and device using a spatial scalable compression scheme (Spatial Scalable Compression Scheme). Background technique [0002] Since digital video contains a large amount of data, the transmission of full-motion high-definition video signals is a big problem when producing high-definition (High Definition) TV programs. Furthermore, each frame of digital image is a still image (also called image) composed of a group of pixels (pixels, also called pixels), and the number of these pixels depends on the display clarity of a specific system. Therefore, the amount of raw digital information in high-resolution video is enormous. In order to reduce the amount of data to be transmitted, compression schemes are used to compress data, so various video compression standards or processes including MPEG-2, MPEG-4, and H.263 ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/46H04N7/50
CPCH04N19/103H04N19/117H04N19/14H04N19/169H04N19/182H04N19/33H04N19/59H04N19/61H04N19/80
Inventor 王进王刚李黎冯·布鲁斯
Owner KONINK PHILIPS ELECTRONICS NV
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