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Multimedia data unequal error protection method based on Raptor code

A technology of multimedia data and multimedia data packets, applied in the direction of error prevention, digital transmission system, electrical components, etc., can solve the problems of increasing difficulty and achieve the effect of easy use

Active Publication Date: 2013-11-13
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This tends to increase the difficulty for practical applications compared to standard Raptor codes

Method used

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  • Multimedia data unequal error protection method based on Raptor code
  • Multimedia data unequal error protection method based on Raptor code
  • Multimedia data unequal error protection method based on Raptor code

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0024] Here, the present invention is applied to the unequal error protection of an H.264 / AVC video packet of a Group Of Pictures (GOP), and the Raptor code adopted is the standard system Raptor code in the 3GPP standard. Refer to the specific implementation figure 1 The flow shown is processed, figure 2 and image 3 They are schematic diagrams of basic unequal error protection and enhanced unequal error protection respectively. The details of the embodiments are further described below.

[0...

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Abstract

The invention provides a multimedia data unequal error protection method based on a Raptor code. The method includes two application modes of basic unequal error protection and reinforced unequal error protection, and unequal error protection of multimedia data packages is achieved through the steps of distortion impact evaluation, sequencing and classification, Raptor coding and transmitting and the like. The method completely utilizes the good characteristics of the Raptor code under large block length. In addition, the method is easy to use due to the fact that the standard Raptor code is used.

Description

technical field [0001] The invention relates to a multimedia data error protection method in the field of communication technology, in particular to a Raptor code-based multimedia data unequal error protection (Uequal Error Protection, UEP) method. Background technique [0002] With the development of information technology, various multimedia applications have become ubiquitous in modern life. Many multimedia services depend on the transmission of multimedia data such as audio and video. Since existing channels such as wireless networks are often inevitably affected by transmission errors. Therefore, how to protect multimedia data in transmission has become a problem that must be faced in practical applications. [0003] One type of method for protecting data transmission is a forward error correction (Forward Error Correction, FEC) method based on a channel code. At present, traditional channel codes such as RS codes are often used to provide protection. Recently, Shok...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
Inventor 宋利骆政屹
Owner SHANGHAI JIAO TONG UNIV
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