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Image decoder anf image encoding method

A decoding device and image coding technology, which are applied in the field of image decoding device and image decoding, and can solve the problems of complex device and inability to decode.

Inactive Publication Date: 2010-01-06
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In this way, since the conventional encoded bit stream is structured as above, there is a problem that, for example, in an MPEG-4 compatible image decoding device, the H.263 encoded bit stream 201 generated based on the H.263 standard cannot be processed. The subject of decoding
[0007] In addition, in order to decode both encoded bit streams corresponding to MPEG-4 and H.263 standards, the image decoding device needs to be equipped with two types of decoding circuits, and there is a problem that the device is complicated.

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Embodiment Construction

[0055] Hereinafter, in order to explain the present invention in more detail, the best mode for carrying out the present invention will be described with reference to the drawings.

[0056] Embodiment 1

[0057] figure 2 is a diagram showing the structure of a coded bit stream received by the image decoding device according to Embodiment 1, figure 2 (a) is an MPEG-4 compatible H.263 coded bit stream 203, and figure 2 (b) is the MPEG-4 coded bit stream 204 . figure 2 (a) The MPEG-4 interchangeable H.263 coded bit stream 203 is in the existing figure 1 VO start code 231 , VO identification number 232 , VOL start code 233 , and H.263 compatible identification information 226 are added to H.263 coded bit stream 201 shown in (a). in addition, figure 2 The MPEG-4 encoded bit stream 204 shown in (b) is in the existing figure 1 H.263 compatible identification information 226 is added to the MPEG-4 coded bit stream 202 shown in (b). In addition, the H.263 compatible identif...

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Abstract

An image coding equipment that can decode even the coding flow is different coding mode, including: the coding mode estimating part of the estimating coding mode according to the distinguishing information of multi-route multiplexing coding mode in the coding digit flow; the heading information setting equipment of the setting second coding mode according to the heading information of the first coding mode; the coding equipment for the image coding data of the first coding mode according to the heading information of the setting second coding mode.

Description

[0001] This application is a divisional application of the application number "200410085559.5", the application date is October 14, 2004, and the invention title is "image decoding device, image coding device, image communication system and coded bit stream conversion device". technical field [0002] The present invention relates to an image decoding device, an image encoding device, an image communication system, and an encoded bit stream conversion device for processing encoded bit streams of different encoding methods. Background technique [0003] Currently, in ISO / IEC JTC11 / SC29 / WG11, the MPEG-4 (Moving Picture Experts Group Phase-4) method in the standardization work and the method based on the ITU-T recommendation H.263 standard are added as The header information (information signal for decoding) in the coded bit stream of the transmission signal is different. [0004] figure 1 (a) is a diagram showing the structure of the H.263 coded bit stream 201 based on the H....

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/44H04N19/50H04N19/625
Inventor 井须芳美关口俊一浅井光太郎西川博文黑田慎一长谷川由里
Owner MITSUBISHI ELECTRIC CORP