Information sending method and device by multiple-description successive refinement coding

A technology for layered coding and information transmission, which is applied in the field of information transmission to reduce communication uncertainty and signal transmission distortion and improve reliability.

Active Publication Date: 2012-08-08
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: how to reduce communication uncertainty and signal transmission distortion, and improve communication reliability

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  • Information sending method and device by multiple-description successive refinement coding
  • Information sending method and device by multiple-description successive refinement coding
  • Information sending method and device by multiple-description successive refinement coding

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Embodiment Construction

[0039] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0040] figure 1 It is a flow chart of the information sending method of multi-description layered coding in this embodiment. Such as figure 1 As shown, the method includes the following steps.

[0041] Step 101: According to the channel state of more than one multipath fading channel, map the information source into at least two descriptors, and each descriptor corresponds to a fading channel.

[0042] Step 102: Perform hierarchical encoding on each descriptor.

[0043] In this step, when performing hierarchical coding on each descriptor, each descriptor is divided into at least two layers.

[0044] Step 103: Express the operation of minimizing the expected distortion...

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Abstract

The invention discloses an information sending method by multiple-description successive refinement coding. The information sending method is characterized by comprising the following steps: S1, mapping an information source into at least two descriptors according to the channel conditions of at least two multipath fading channels, wherein each descriptor is in one-one correspondence with a fading channel; S2, performing successive refinement coding on each descriptor to divide each descriptor into at least two layers; S3, expressing the operation of minimizing expectation distortion to be the operation of maximizing the sum of diversity gain and multiplexing gain, and solving the operation of maximizing the sum of diversity gain and multiplexing gain to obtain the channel coding rate and channel allocation parameters of each layer of each descriptor; and S4, sending at least two descriptors by respectively adopting the channel coding rate and channel allocation parameters of each layer of each descriptor through the corresponding fading channel of the descriptor. According to the invention, the channel allocation and the channel transmission rate on the subchannel after allocation are considered, so that the communication uncertainty and signal transmission distortion are reduced and the communication reliability is improved.

Description

technical field [0001] The present invention relates to the technical field of information transmission, in particular to an information sending method and device of multi-description layered coding. Background technique [0002] In the field of information transmission technology, layered coding (Successive Refinement Coding, referred to as SRC) and multiple description coding (Multiple Description Coding, referred to as MDC) are two commonly used anti-error technologies. SRC and MDC have their own advantages in different transmission conditions and application environments. The video stream generated by SRC can be adaptively adjusted within a wide bit rate range, and can adapt to transmission problems caused by channel bandwidth fluctuations and receiving device heterogeneity. MDC uses multiple coders to encode, and each coder will generate an independent source description, which can be regarded as a source of distortion, and the degree of distortion will decrease as the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04N7/24H04N7/26H04N19/147H04N19/39
Inventor 陆建华杜冰
Owner TSINGHUA UNIV
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