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Method and device for filtering coded image partitions

An image and coding technology, applied in the field of video coding, to achieve the effect of flexible coding

Active Publication Date: 2014-01-08
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The filtering described in publication [1] has the disadvantage that for each individual block it must be signaled whether filtering should be used, so that in the case of a large number of partitioned blocks it is necessary to Send lots of additional information in

Method used

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  • Method and device for filtering coded image partitions
  • Method and device for filtering coded image partitions
  • Method and device for filtering coded image partitions

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Embodiment Construction

[0035] The following described embodiments of the inventive method are based on the figure 1 The hybrid video coding architecture shown in , where the components shown are per se known from the prior art. The method according to the present invention differs from the prior art in that it is based on figure 1 The loop filter LF shown in performs filtering as described in more detail further below.

[0036] figure 1 The architecture of shows a coded COD for a stream of video images I from which a prediction error signal S is derived by means of a differentiator DI, which is subjected to a transformation known per se (in particular the DCT transformation ; DCT=discrete cosine transform) and then subjected to the likewise known quantization Q, whereby a compressed prediction error signal CS is obtained. The signal is subjected to lossless entropy coding EC. The signal S' thus obtained is then decoded using the corresponding decoding DEC.

[0037] For ascertaining the predicti...

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Abstract

The method involves encoding the image content signal (S) for respective digitized images (I). The reconstructed images (RI) are produced by reconstructing the uncoded image content signal. The filtering of reconstructed images is performed so that respective reconstructed image is divided into partitions and one or more filter parameters (FP) are defined for each partition. Some of the partitions are described by one or more parameters of function which is the curve of pixels within preset image area for describing the course of pixels. Independent claims are included for the following: (1) codec; (2) method for decoding a sequence of digitized images; (3) device for decoding a sequence of digitized images; and (4) device for coding a sequence of digitized images.

Description

technical field [0001] The invention relates to a method for encoding a sequence of digitized images and a corresponding decoding method. Furthermore, the invention relates to an encoding device and a decoding device for performing encoding and decoding methods, respectively. [0002] The present invention is in the field of video coding. In this case, the content of temporally consecutive digital images consisting of a large number of pixels is compressed using a corresponding compression method, wherein the similarity between temporally adjacent images is generally taken into account appropriately in order to reduce the compressed image stream the size of. Background technique [0003] In order to improve the image quality of the encoded image stream after encoding the image stream, various filtering methods are known from the prior art. In this case, the already coded images of the image stream are reconstructed again and corresponding filters are applied to them, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/117H04N19/17
CPCH04N19/0026H04N19/00896H04N19/00066H04N19/00278H04N19/117H04N19/17H04N19/176H04N19/82H04N19/80
Inventor P.阿蒙
Owner SIEMENS AG
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