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Multiple description encoding, method, apparatus and system for multiple description encoding

A multi-description encoding and multi-description technology, applied in the fields of multi-description encoding and multi-description decoding, can solve the problems of large-scale error, loss of quantization precision, complex decoder design, etc., and achieve the effect of improving experience and reducing complexity

Active Publication Date: 2009-01-07
HUAWEI TECH CO LTD
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  • Claims
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Problems solved by technology

[0006] During the research and practice of the existing technology, the inventors found that the existing technology has the following problems: the design of the decoder is relatively complicated, and when more than half of the descriptions are discarded, more than half of the quantization accuracy is lost, and the received descriptions are used to decode will introduce a large quantization error

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  • Multiple description encoding, method, apparatus and system for multiple description encoding
  • Multiple description encoding, method, apparatus and system for multiple description encoding
  • Multiple description encoding, method, apparatus and system for multiple description encoding

Examples

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example 1

[0045] Example 1. The first multi-description method is: multi-description parity separation or multi-description dual transformation, and the second multi-description method is: multi-description scalar quantization.

[0046] After the signal S is encoded by a multi-description encoder, the encoder firstly performs 2-description parity separation or dual transformation on the signal S, outputs descriptions MI and MII, and then performs scalar quantization of 2 descriptions on the descriptions MI and MII respectively, and outputs descriptions respectively M1, describe M2, describe M3, describe M4, and then use an entropy encoder to perform entropy encoding on description M1, description M2, description M3, and description M4, for example, use huffman coding to output description M1 bit stream, description M2 bit stream, description M3 bit stream, describing M4 bit stream.

[0047] The calculation process of parity separation, dual transformation and scalar quantization is desc...

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Abstract

The invention belongs to the technical field of communication and provides a method for multiple descriptions coding and decoding, a device and a system. The technical proposal of the invention is as follows: an encoding end receives a signal and processes the signal by a first multiple descriptions method, thus generating at least two first descriptions; at least one of the first descriptions is processed by a second multiple descriptions method, thus generating at least two second descriptions which are then encoded; a multiple descriptions bit stream is output; an decoding end carries out reverse transform process of the encoding end and outputs a reconstructed signal. By adopting the invention, complexity of the multiple descriptions decoding can be reduced and acoustic injuries can be distributed in different aspects, thus enhancing auditory feeling of users.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method, device and system for multiple description encoding and multiple description decoding. Background technique [0002] Multiple Description Coding (MDC, Multiple Description Coding) is a source coding technology for transmitting information in unreliable networks. It can generate at least one transmission bit stream and introduce The redundancy method provides a source coding algorithm that is resistant to packet loss. Multiple description coding uses multiple descriptions to represent source information, each description provides an approximation to the original source information, multiple descriptions can be extracted mutually to produce an optimal approximation to the original source information. [0003] There are many methods of multi-description coding, such as parity selection, dual transformation, scalar quantization, etc. The multi-description p...

Claims

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Application Information

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IPC IPC(8): H04L1/00
CPCH04N7/26079H04N19/0046H03M7/30H04N7/26345H03M13/373H03M13/6312H04N19/0009H04N19/124H04N19/39
Inventor 詹五洲
Owner HUAWEI TECH CO LTD
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