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Quick fractal compression and decompression method for multicasting stereo video based on object

A fractal compression and stereoscopic video technology, applied in stereoscopic systems, digital video signal modification, television, etc., can solve the problems of difficult compression time and image quality, slow encoding speed, and large amount of computation

Inactive Publication Date: 2013-12-11
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the cyclic predictive coding (CPM) method, in order to ensure that the initial frame can approximately converge to the original image after its own cyclic decoding, the compression process needs to go through complex transformations, searches, and iterations, etc., and the compression time and image quality are difficult to meet the requirements.
At present, the typical fractal image and video compression method has a large amount of calculation, the encoding speed is slow, and the quality of decoding needs to be improved, so the fractal image and video compression method needs further improvement and improvement

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  • Quick fractal compression and decompression method for multicasting stereo video based on object
  • Quick fractal compression and decompression method for multicasting stereo video based on object
  • Quick fractal compression and decompression method for multicasting stereo video based on object

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[0143] The method of the present invention will be further described in detail below in conjunction with the accompanying drawings. Only the brightness component Y is taken as an example, and the compression steps of the color difference components U and V are the same as the brightness components.

[0144] An object-based fast multi-object stereoscopic video fractal compression and decompression method selects the middle object as a reference object and uses MCP compression, and other objects use DCP+MCP compression. The intermediate object is a reference object, using a separate motion compensation prediction method MCP coding, using the video segmentation method to obtain the video object segmentation plane, that is, the Alpha plane, using block DCT transform coding for the initial frame, and performing block motion estimation / compensation coding for non-I frames, Calculate the pixel sum and pixel square sum of the sub-block related to the sub-block domain and the parent blo...

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Abstract

The invention discloses a quick fractal compression and decompression method for a multicasting stereo video based on an object. A middle eye is selected as a reference eye and is compressed by MCP (motion compensation prediction), and other eyes are compressed by DCP (disparity compensated predication) +MCP; the middle eye is the reference eye, and independent motion compensation prediction mode MCP coding is adopted; a video object splitting plane, i.e. an Alpha plane, is obtained with a video splitting method to cause an initial frame to be subjected to DCT coding; the non I frame is subjected to motion estimation / compensation coding to calculate the pixel sum and the pixel quadratic sum of sub blocks relevant to a sub block region and a father block region; the pixel sum and the pixel quadratic sum of the interpolated value corresponding block of a subpixel are calculated; preview search limiting condition judgment is carried out; the most similar matching block in a previous frame of search window is found by an unsymmetrical cross-shaped multi-level hexagon lattice point search algorithm matched and improved by a subpixel block; and the left eye and the right eye are coded by MCP+DCP. During DCP coding, the subpixel block is matched, and conditions are restricted by disparity distribution. In the decoding process, the step of filtering is carried out with a deblocking loop method.

Description

technical field [0001] The invention belongs to the field of video compression coding, relates to compression coding of multi-eye stereo video, in particular to a video compression coding method based on objects and fractals, which lays the foundation for the real-time application of stereo video coding and further improves the fractal multi-eye stereo Performance of video compression encoding. Background technique [0002] The concept of Object-Based (OB) coding was first proposed by the MPEG-4 standard. Using the object-based video compression coding method enables the foreground objects and background objects of each frame of video to be independently coded, which can further improve compression. At the same time, some new functions can be realized at the decoding end, such as independent transmission and decoding for each video object, object and background replacement, object-based video retrieval, especially compared to the standard encoding method, in the object Bett...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N7/50H04N13/00H04N19/176H04N19/597H04N19/82H04N19/90
Inventor 祝世平陈菊嫱王再阔侯仰拴
Owner BEIHANG UNIV
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