Group coding using method and system in compatible DAB mobile multimedia broadcasting

A mobile multimedia and packet coding technology, applied in the field of information transmission, can solve the partial influence of the DAB system except for coding, and the problem that the receiving end cannot correctly identify the packet coding block, etc.

Active Publication Date: 2007-08-22
BEIJING NUFRONT MOBILE MULTIMEDIA TECH
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of coding technology, there have been coding methods with better performance than convolutional codes, such as Turbo codes, LDPC codes, etc., but if a new block coding method (such as LDPC, etc.) is directly used to replace the convolutional codes in the DAB system, It will affect the part of the DAB system other than the encoding, and there is also the problem that the block encoding block cannot be correctly identified at the receiving end

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Group coding using method and system in compatible DAB mobile multimedia broadcasting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] A specific embodiment of the present invention is shown in FIG. 1 .

[0026] The task of the DAB transmitter is to receive the ETI (signal group interface) signal transmitted from the group multiplexing unit, and perform corresponding encoding, interleaving, and modulation on the data of each sub-channel according to the instructions in the ETI to form a transmission frame. Since the coding of each sub-channel is independent and can be separated in time, it is possible to use block coding with better performance in some of these sub-channels, so that new services can be transmitted without affecting other parts of the DAB system, as follows A specific example of the present invention is given.

[0027] In this example, the rate of the new service is 64k bps, the DAB system works in transmission mode 1, the subchannel mapping method of the new service is 8DPSK, and the subchannel of the new service uses (9216, 4608) block coding, that is, the input is 4608 bits The grou...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A method for carrying out packet coding in compatible DAB mobile multimedia broadcast includes utilizing buffer units in front or at back of coder to regulate speed rate of input and output information and to indicate position information of coding block in transmission frame, obtaining packet code block and carrying out decoding by decoder according to said position information. The system applying said method is also disclosed.

Description

technical field [0001] The present invention relates to information transmission, especially information communication in Internet, multimedia broadcasting, data broadcasting and other applications. Background technique [0002] The core of the communication system is how to improve transmission efficiency and reliability within a limited bandwidth, and in order to improve reliability, error correction codes are usually used in the system. The digital audio broadcasting (DAB) system uses a convolutional code as an error correction code, while the DAB-compatible T-DMB system uses a convolutional code plus an RS code as an error correction code. With the development of coding technology, there have been coding methods with better performance than convolutional codes, such as Turbo codes, LDPC codes, etc., but if a new block coding method (such as LDPC, etc.) is directly used to replace the convolutional codes in the DAB system, It will affect the parts of the DAB system excep...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04H1/00H03M13/00H04H20/00
Inventor 鲍东山于晓燕王凯
Owner BEIJING NUFRONT MOBILE MULTIMEDIA TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap