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Method and device for coding and encoding digitized image

An encoding method and image technology, which are applied in the field of encoding and decoding of digital images and devices to achieve the effects of reducing transmission capacity, improving compression, and improving image quality

Inactive Publication Date: 2006-03-01
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0027] The disadvantage of SA-DCT is that none of the obtained transformation coefficients (spectral coefficients) can represent the same component of the BP coding information of the image object BO

Method used

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  • Method and device for coding and encoding digitized image
  • Method and device for coding and encoding digitized image
  • Method and device for coding and encoding digitized image

Examples

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Embodiment Construction

[0072] attached figure 2 A camera K is shown, with which a series of images B are captured and fed via a connection V to the first computer R1.

[0073] In the first computer R1, the pictures in the picture series B are digitized and coded according to the method of the future MPEG4 standard described in [6].

[0074] The first computer R1 is connected to the second computer R2 via a transmission medium UM, for example a cable or radio link. The image data encoded in the first computer R1 are transmitted via the transmission medium UM to the second computer R2 and decoded there.

[0075] The first computer R1 and the second computer R2 each have a memory SP and a computing unit RE. The memory and computing unit are connected to each other via a bus BU. The computing unit RE of the first computer R1 is designed to encode the digitized image in the processing steps described below. The computing unit RE of the second computer R2 is designed to decode the received coded data...

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Abstract

The same amount of coding information for pixels contained in an edge image block is determined separately for said edge image block and subtracted from the coding information of the pixels of the edge image block, whereby enhanced coding efficiency is obtained.

Description

technical field [0001] The invention relates to a method for encoding and decoding a video data stream including digitized images. Background technique [0002] Video signal coding corresponds to image coding standards MPEG (MPEG1, MPEG2) [1], JPEG [2], H.261 [3], H.263 [4], and is based on the so-called block image coding principle of. [0003] Block-based image coding methods use the principles of evaluation coding and transform coding. [0004] During the evaluation, image differences are produced by subtracting the image data to be evaluated from the original image data to be encoded. [0005] For the evaluation, a so-called motion-compensated evaluation is used. The fundamentals of motion assessment required here, and their application to motion compensation evaluation, are known to experts [5]. The motion assessment of a picture block to be coded is carried out by combining the luminance information (brightness information) of the picture block to be coded, respect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/30H04N19/60G06T9/00H04N1/41H04N19/102H04N19/107H04N19/12H04N19/136H04N19/14H04N19/159H04N19/176H04N19/189H04N19/196H04N19/20H04N19/423H04N19/503H04N19/577H04N19/61H04N19/625H04N19/85H04N19/91H04N19/93
CPCG06T9/007
Inventor A·考普
Owner SIEMENS AG