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Embedded multi-service transmitting method based on DTMB standard and device thereof

A sending method and multi-service technology, applied in the field of digital information transmission, can solve problems such as waste of system resources, failure to realize transmission, poor reception effect, etc., and achieve the effect of rational use of frequency spectrum and saving system resources

Active Publication Date: 2010-12-08
TSINGHUA UNIV +1
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Problems solved by technology

Currently existing DTMB systems can only meet the transmission requirements of existing TV services. For other multi-services, due to reasons such as receiving power and transmission rate, the receiving effect is not good or even cannot be transmitted at all. Due to the widespread existence and use of DTMB systems , redesigning the new system will waste a lot of valuable system resources, which seems very unnecessary

Method used

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  • Embedded multi-service transmitting method based on DTMB standard and device thereof
  • Embedded multi-service transmitting method based on DTMB standard and device thereof
  • Embedded multi-service transmitting method based on DTMB standard and device thereof

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Embodiment Construction

[0045] In order to make the purpose, content, and advantages of the present invention clearer, the implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0046] Such as image 3 Shown is a flow chart of embedding mobile multimedia services into the DTMB system of an embodiment of a method for sending embedded multi-services based on the Chinese digital TV terrestrial broadcasting standard proposed by the present invention. In this embodiment, the DTMB system terrestrial digital television service (hereinafter referred to as the TV service) is set to adopt packet coding LDPC0.8 (7488, 6096) in the DTMB system, and the modulation method is 16-QAM; the embedded mobile multimedia service (hereinafter referred to as the mobile service) ) is set to adopt the packet code LDPC0.4 (7488, 3048) in the DTMB system, and the modulation method is 4-QAM. Described method specifically comprises the following ...

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Abstract

The invention relates to the technical field of digital information transmission. The invention provides an embedded multi-service transmitting method based on China Digital Terrestrial Multimedia Broadcast (DTMB) standard and a device for realizing the method. On the premise of not changing the receiving end in the traditional China DTMB standard at all, the method designs a new transmitting end structure and transmits multiple services in an embedded mode. The device comprises a randomizing module, an embedded multi-service coding module, an embedded multi-service fixed expansion mapping module, an embedded multi-service data format matching module, an embedded multi-service randomizing module, a multiplexing module, a China DTMB standard system randomizing rear transmitting end module and a control module. The invention expands the existing system of the China DTMB standard to transmit multiple services in an embedded mode, and adds the functions of power saving and the like, thereby widening the application range of China DTMB standard. The invention is especially suitable for single-transmitter operation and wide-range single-frequency network.

Description

technical field [0001] The present invention relates to the technical field of digital information transmission, and in particular to a sending method and implementing device of an embedded multi-service (Multiple Service Embedded in Chinese Digital Television Terrestrial Multimedia Broadcast, MSEDTMB) based on the Chinese digital television terrestrial broadcast standard in a wireless broadcast communication system . Background technique [0002] In the past two decades, with the rapid development of modern communication technology and the increasing demand for wireless communication services, it is of great significance to provide users with the services they need. The proprietary communication system for transmitting various services has also become the most basic communication system for existing single services because of its strong pertinence, and has been widely used in communications such as wireless local area network, fixed wireless access, wireless digital audio a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/167
Inventor 王军王晓晴宋健王劲涛李彦刚唐世刚
Owner TSINGHUA UNIV
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