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Method and device for sending and receiving service description information in digital audio broadcasting system

A technology for digital audio broadcasting and service description, applied in the direction of digital transmission system, multi-frequency code system, transmission path separation device, etc., can solve the problem that the reliability of service description information symbols is not high, and the time and frequency diversity cannot be effectively used and other issues to achieve the effect of improving credibility and reducing complexity

Active Publication Date: 2017-07-25
ACADEMY OF BROADCASTING SCI STATE ADMINISTATION OF PRESS PUBLICATION RADIO FILM & TELEVISION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in these current systems, the service description information symbols are placed in a centralized manner, which cannot effectively utilize time and frequency diversity, and the reliability of the service description information symbols is not high

Method used

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  • Method and device for sending and receiving service description information in digital audio broadcasting system
  • Method and device for sending and receiving service description information in digital audio broadcasting system
  • Method and device for sending and receiving service description information in digital audio broadcasting system

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] The digital audio broadcasting system described in the embodiment of the present invention is an OFDM system.

[0031] figure 1 It is a schematic diagram of a device for sending service description information in the digital audio broadcasting system of the present invention. see figure 1 , the sending device includes:

[0032] The scrambler, in one embodiment, is a pseudo-random sequence scrambler, which is used to scramble the service description information (SDIS) to be sent to generate an information bit stream with binary random sequence characteristics, and output the information bit stream to the encoder;

[0033] The encoder, in one embodiment, is a forward error correction encoder, which is used to encode the input information bit stream, search out the corresponding code word in the code word set, obtain the coded...

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Abstract

The invention discloses a method and device for sending and receiving service description information in a digital audio broadcasting system. When sending, the service description information is sequentially subjected to scrambling, forward error correction coding, bit interleaving and constellation mapping to obtain modulation symbols; according to The system frame structure places modulation symbols on predetermined symbols and their carriers in the residual capacity of the system in a distributed manner, and multiplexes them with other signal elements to form frequency domain signals, and converts frequency domain signals into time domain signals for transmission. When receiving, convert the time-domain signal into a frequency-domain signal and demultiplex the effective carrier; extract the distributed service description information symbols from the effective carrier according to the system frame structure, and then perform demapping, deinterleaving, forward Error correction decoding and descrambling to obtain service description information. The invention can improve the reliability of transmitting service description information symbols in the remaining capacity, and provide a powerful guarantee for the digital audio broadcasting system to support rich program content and flexible business models.

Description

technical field [0001] The present invention relates to the technical field of digital audio broadcasting, in particular to a method for sending and receiving service description information in a digital audio broadcasting system and a sending and receiving device. Background technique [0002] The digital audio broadcasting system has the characteristics of high spectrum utilization, wide coverage and rich program content. In order to provide better service quality and user experience, digital audio broadcasting usually supports multiple business modes including data services and audio services. Therefore, only an efficient and reliable service description information symbol transmission mechanism can meet the needs of multi-channel audio data multiplexing broadcasting. Different from the main service data, the error-free probability of the service description information symbol is higher, and the service description information symbol will occupy part of the transmission ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L1/06H04L1/00
CPCH04L1/0071H04L1/0004H04L1/0072H04L5/0007H04L5/0053H04L2001/0093
Inventor 邹峰李锦文申红兵杨明邢观斌高鹏雷文冯昂
Owner ACADEMY OF BROADCASTING SCI STATE ADMINISTATION OF PRESS PUBLICATION RADIO FILM & TELEVISION
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