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Decoding apparatus and method, coding apparatus and method, and image processing system and method

An image processing and decoding technology, applied in the field of decoding equipment, to achieve the effect of accurate re-encoding

Inactive Publication Date: 2004-08-11
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The encoder cannot process the bitstream signal in a normal way because it encodes the bitstream with wrong encoding parameters

Method used

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  • Decoding apparatus and method, coding apparatus and method, and image processing system and method
  • Decoding apparatus and method, coding apparatus and method, and image processing system and method
  • Decoding apparatus and method, coding apparatus and method, and image processing system and method

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Embodiment Construction

[0039] Embodiments of the present invention are described below in conjunction with the accompanying drawings.

[0040] The invention is applied, for example, to an image processing system of the type shown in FIG. 1 .

[0041] The image processing system 1 includes a decoder 10 and an encoder 30 connected in series. The decoder 10 receives a bit stream from an external device. The bit stream is a bit stream encoded according to the MPEG 2 standard. The encoder 30 encodes the image data decoded by the decoder 10, or re-encodes the image data, and then outputs the image data to an external device in the form of a bit stream.

[0042] The decoder 10 includes a buffer 11 for receiving a bit stream encoded according to the MPEG 2 standard and supplied from said external device. The buffer 11 temporarily stores the bit stream and then outputs the bit stream to a variable length decoding (VLD) section 12 .

[0043] The variable-length decoding section 12 performs variable-length...

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Abstract

An image processing system comprising a decoder 10 and an encoder 30. The decoder 10 comprises a section 12 for decoding a bit stream to generate image data, generating coding parameters for each layer and generating an error flag indicating whether the coding parameters can be effectively used. The encoder 30 comprises a control section 41, an MB-parameter calculating section 36, an encoding section 38 and a variable-length encoding section 39. The section 41 determines, from the error flag, whether or not the coding parameters can be effectively used or not. The section 36 calculates coding parameters when the coding parameters generated by the section 12 are invalid. The sections 38 and 39 encodes the image data by using the coding parameters generated by the section 12 when these parameters are valid, and by using the coding parameters calculated by the section 36 when the coding parameters generated by the section 12 are invalid.

Description

technical field [0001] The present invention relates to a decoding device, a decoding method, a coding device, a coding method, an image processing system and an image processing method. All of these are used in a system that encodes the image data again. In particular, the present invention relates to a decoding device and method for generating image data from a coded bit stream and encoding parameters for re-encoding the image data, and an encoding device for encoding encoded image data supplied from the decoding device using the encoding parameters provided by the decoding device An image processing system and method for decoding a bit stream to generate image data and generating encoding parameters for re-encoding the image data and encoding image data supplied from the decoding device using the encoding parameters provided from the decoding device. Background technique [0002] When a conventional system re-encodes an image signal encoded using the MPEG (Moving Picture...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/00H04N19/102H04N19/114H04N19/126H04N19/152H04N19/159H04N19/166H04N19/177H04N19/186H04N19/187H04N19/196H04N19/30H04N19/423H04N19/59H04N19/625H04N19/65H04N19/67H04N19/70H04N19/85H04N19/89H04N19/895H04N19/91
CPCH04N19/00781H04N7/50H04N19/00472H04N7/26941H04N19/61H04N19/40
Inventor 加藤元树小幡功史伊木信弥成田秀之
Owner SONY CORP