Compatiable DAB ground mobile multimedia broadcast receiving and transmitting method and system

A mobile multimedia and multimedia broadcasting technology, applied in the field of digital information transmission, can solve the problems of incompatibility, non-universality, T-DMB does not provide sufficient information throughput and high-quality services, etc.

Inactive Publication Date: 2007-08-22
NUFRONT MOBILE COMM TECH
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  • Abstract
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Problems solved by technology

[0010] The three standards of T-DMB, DVB-H and MediaFLO all have different levels of deficiencies: T-DMB spectrum utilization is low, T-DMB does not provide enough information throughput to meet high-quality services such as mobile TV, T-DMB DMB does not provide enough power-saving measures for receivers; since DVB-H is inherited from DVB-T (fixed receiving system), there is very limited room for optimization for mobile environments on this basis, and DVB-H fails to provide enough power for receivers. Power-saving mechanism, and some other performance indicators are sacrificed, such as the switching time increased to 5 seconds, in addition, there are fewer operating frequencies available; MediaFLO is an independent system, not compatible, mainly designed for 700MHz frequency, not universal sex

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  • Compatiable DAB ground mobile multimedia broadcast receiving and transmitting method and system
  • Compatiable DAB ground mobile multimedia broadcast receiving and transmitting method and system
  • Compatiable DAB ground mobile multimedia broadcast receiving and transmitting method and system

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Embodiment

[0133] FIG. 5 is a specific flowchart of a DAB-compatible T-MMB transmission method in an embodiment of the present invention. In this embodiment, source coding, conditional access scrambling, energy dispersal, channel coding, and time interleaving are sequentially performed before service data is multiplexed to the MSC main channel, which is consistent with the processing procedure of the DAB system. As shown in Figure 5, the method specifically includes:

[0134] Step 501, preset the service type of multimedia broadcasting, the service type includes terrestrial mobile multimedia broadcasting T-MMB service.

[0135] In this step, the service types set to be transmitted include four types of service data: DAB, DAB-IP, T-DMB and T-MMB.

[0136] Step 502, receiving multimedia broadcasting service data, and performing source coding, conditional access scrambling and energy dispersal on the received service data according to the service type.

[0137] Source coding is the aforem...

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Abstract

A method for receiving -transmitting ground mobile multimedia broadcast of compatible DAB includes receiving service data of multimedia broadcast, carrying out source and channel coding on service data, embedding coded data in main service channel MSC, identifying sub-channel information and carrying out channel coding on data in FIC channel, carrying out channel modulation and OFDM modulation as well as radio frequency modulation on data in FIC and MSC channels then sending modulated data out.

Description

technical field [0001] The invention relates to the technical field of digital information transmission, in particular to a terrestrial mobile multimedia broadcast (T-MMB) transceiver method and system compatible with Digital Audio Broadcasting (DAB, Digital Audio Broadcasting). Background technique [0002] Digital multimedia broadcasting refers to the multimedia broadcasting method used for handheld terminals. At present, the digital multimedia broadcasting standards that attract more attention in the industry are the European standard DVB-H, the American MediaFLO and the Korean standard T-DMB. [0003] T-DMB, the full name of Digital Multimedia Broadcasting (Digital Multimedia Broadcasting), is developed on the basis of DAB. DAB digital broadcasting was developed by a 12-member association - the famous EUREKA-147. The original name of the system was Digital Audio Broadcasting (DAB), and it has been used to distinguish true DAB broadcasting from other digital audio broadca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L1/00H04H1/00H04H20/46H04H20/57H04H20/72H04H20/86H04H40/27
CPCH04H20/46H04H20/57H04H20/72H04H20/86H04H40/27
Inventor 鲍东山刘飞王加庆王斌司宏伟
Owner NUFRONT MOBILE COMM TECH
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