Digital television multimedia broadcast transmission system exciter

A technology of TV broadcasting and exciter, applied in the field of exciter, can solve the problem of no calibration exciter and so on

Inactive Publication Date: 2008-04-16
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The exciter equipment that has been published so far can only achieve correction in a single-carrier or multi-carrier mode, and there is no exciter that can correct both signal processing modes of single-carrier modulation and multi-carrier modulation

Method used

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  • Digital television multimedia broadcast transmission system exciter
  • Digital television multimedia broadcast transmission system exciter
  • Digital television multimedia broadcast transmission system exciter

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Embodiment Construction

[0023] First introduce the composition and function of each part of the present invention in detail:

[0024] As shown in FIG. 1 , the input image code stream M first enters the code stream processing module 1 . The input interface of the code stream processing module 1 is compatible with EN50083-9 (Part 9 in "Television Signals, Sound Signals and Interactive Service Cable Networks": CATV / SMATV starting point interface and DVB / MPEG-2 transport stream are specifically described in special equipment ). One function of this code stream processing module 1 is to convert the format of the input code stream. The interface of the input code stream includes two modes of serial and parallel. The conversion is performed in this code stream processing module 1, and the parallel code stream generated after conversion is transported Give baseband digital modulation module 2; Another function of this code stream processing module 1 is to carry out single frequency network delay control, the ...

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Abstract

Based on a new processing structure, the invention discloses a transfer system stimulator of digital television multimedia broadcasting which can implement signal process under per carrier modulation and multi carrier modes. The stimulator consists of a nonlinear pre-correction process module and a modulator, wherein, the modulator comprises a code current process module, a baseband digital modulation module, a digital-analogy switch module, a local oscillation generator, a phase shifter, a mixer, a combiner, a filter, a controller, and a controlling interface. The invention realizes the single frequency network combination of digital multimedia broadcasting transfer system, and accords with the requirements of CNS GB20600-2006 ground digital multimedia broadcasting (DTMB). Besides, the invention can be used to a plurality of other digital television multimedia broadcasting transfer system, with important applications in military and civil use such as deep sky detection, multimedia communication, radio navigation, etc.

Description

technical field [0001] The invention relates to an exciter for a multimedia television broadcasting system, in particular to an exciter for a digital television multimedia broadcasting transmission system (hereinafter referred to as "the exciter"). Background technique [0002] The terrestrial digital television multimedia broadcasting (Digital Television Multimedia Broadcasting, referred to as DTMB) system is an important part of my country's comprehensive radio and television coverage network. It cooperates with satellite digital television broadcasting systems, cable digital television broadcasting systems and other auxiliary systems to provide comprehensive Audience coverage. In 2006, my country promulgated the "Digital TV Terrestrial Broadcasting Transmission System Frame Structure, Channel Coding and Modulation" standard, numbered GB20600-2006, marking that the development of my country's TV broadcasting industry has entered a new era. This standard describes the frame...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N5/44
Inventor 张晓林路程张展李铀张彦仲
Owner BEIHANG UNIV
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