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Ground mobile multimedia broadcast receiving and transmitting method and systme based on free DAB

A technology for mobile multimedia and multimedia services, applied in the field of digital information transmission, can solve problems such as the inability to meet the error-free reception of video and the low utilization rate of spectrum

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

Because DAB uses convolutional coding and DQPSK modulation, the spectrum utilization rate of the system is not high, and the convolutional code cannot meet the quasi-error-free reception of video

Method used

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  • Ground mobile multimedia broadcast receiving and transmitting method and systme based on free DAB
  • Ground mobile multimedia broadcast receiving and transmitting method and systme based on free DAB
  • Ground mobile multimedia broadcast receiving and transmitting method and systme based on free DAB

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Embodiment Construction

[0084] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0085] Fig. 1 is the general flow chart of sending and receiving of the free DAB-based T-MMB sending and receiving method of the present invention. as the picture shows,

[0086] According to the preset multimedia service configuration parameters, perform source coding and channel coding on the service data in sequence, and embed the coded service data into the main service channel MSC of the T-MMB system in a time-division multiplexed manner;

[0087] Based on the fast information group FIG in the DAB fast information channel FIC, the sub-channel information corresponding to the service data is identified in the FIC of the T-MMB and channel coded;

[0088] Channel modulation is performed on the coded symbols of MSC and FIC to form a T-MMB...

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Abstract

A method for receiving-transmitting ground mobile multimedia broadcast based on free charge DAB includes configuring parameter according multimedia service to carry out source and channel coding and embedding coded service data in master service channel MSC as well as carrying out channel coding to form T-MMB transmission frame being sent out at sending end, synchronizing and decoding received signal and picking up configured parameter as well as carrying out decoding on source and channel at receiving end.

Description

technical field [0001] The invention relates to the technical field of digital information transmission, in particular to a free DAB-based ground mobile multimedia broadcasting transceiver system and method. Background technique [0002] DAB (Digital Audio Broadcasting) digital broadcasting was developed by the famous EUREKA-147, an association of 12 members. The original name of the system was Digital Audio Broadcasting (DAB), and it has been used to distinguish real DAB broadcasting from Other standards for digital audio broadcasting. In 1994, Eureka-147 was selected by the International Organization for Standardization (ISO) as the international standard for digital audio broadcasting. Compared with the traditional AM / FM broadcast system, DAB has the advantages of saving spectrum resources, low transmission power, large amount of information, anti-noise, anti-interference, anti-wave propagation fading, suitable for high-speed mobile reception, etc. It provides CD-level s...

Claims

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Application Information

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IPC IPC(8): H04L27/00H04L1/00
Inventor 张健王凯鲍东山
Owner NUFRONT MOBILE COMM TECH
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