Transmission method for raio multimedic broadcast system and its system

A technology of multimedia broadcasting and transmission methods, applied in the field of digital television systems, can solve problems such as limitations, and achieve the effect of ensuring performance and implementation efficiency

Inactive Publication Date: 2005-06-08
TIMI TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This has brought great restrictions to mobile terminal equipment, which

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  • Transmission method for raio multimedic broadcast system and its system
  • Transmission method for raio multimedic broadcast system and its system
  • Transmission method for raio multimedic broadcast system and its system

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail as follows:

[0024] Referring to FIG. 2, a transmission method for a wireless multimedia broadcasting system, which determines the logical channel, modulation scheme, and control signal required to transmit each data channel according to the characteristics of the data to be transmitted; according to the determined logical channel, The modulation scheme and the control signal are used to allocate logical channels for the various channels of data, and perform respective coding and interleaving on the respective logical channels; map the coded and interleaved signals; perform framing operations on the mapped signals; The operation of adding scrambling code to the signal; modulating the above-mentioned signal added with scrambling code; transmitting the modulated signal. Referring to Figure 1, four logical channels LC1, LC2, LC3, and LC4 are used first. The confi...

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Abstract

The invention provides a transmitting method and system for wireless multimedia broadcasting system, where the method includes the following steps: according to the property of each channel data that needs transmitting, determining logic channel and modulating solution needed to transmit each channel data; allocating the logic channel to each channel data and making coding interlace on the logic channel; making mapping and frame-forming operation on the signal through the coding interlace; scrambling operation; modulating the signal; able to combine many logic channels according to the transmitted data property, or dividing them each into many subchannels, where the modulating types and coding modes for these logic channels are mutually independent. Thus it realizes flexible data channel configuration according to different application requirements, provides coding protection at different grades, and provides multiple services largely beyond the range of one-way broadcast. It assures the performance and implementing efficiency of data transmission in different packet lengths and provides an open platform for wideband wireless communication.

Description

technical field [0001] The present invention relates to a digital television system, in particular to a data transmission method for terrestrial multimedia interactive broadcasting, in particular to a transmission method and system for a wireless multimedia broadcasting system. Background technique [0002] Existing terrestrial digital TV systems (such as DVB-T) mainly provide one-way TV services. The data structure is limited to a specific video format, namely MPEG-2, so it lacks the flexibility to develop multimedia services. For example, the input signal in the DVB-T system is encoded into a larger code block, and the entire block must be decoded in order to extract short information separately. This places great constraints on mobile terminal equipment, which are usually characterized by portability / mobileness and low power consumption. [0003] Increasing user demands require that the future terrestrial TV network can simultaneously transmit high-definition television...

Claims

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Application Information

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IPC IPC(8): H04N7/16H04N7/173
Inventor 刘辉王联邢观斌沈漫源杨庆华申红兵李群
Owner TIMI TECH
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