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Interactive digital television front end high unvoiced sound video interface system

A digital TV and video interface technology, which is applied in TV system components, digital video signal modification, multi-frequency code system, etc., can solve problems such as deficiencies, achieve small convergence errors, reduce user costs, and improve system integration Effect

Inactive Publication Date: 2011-06-01
DONGGUAN NISTAR TRANSMITTING TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the above reasons, the current high-definition digital TV also has deficiencies in the processing of audio and video signals by RF carriers.

Method used

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  • Interactive digital television front end high unvoiced sound video interface system
  • Interactive digital television front end high unvoiced sound video interface system
  • Interactive digital television front end high unvoiced sound video interface system

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Embodiment Construction

[0027] Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements.

[0028] As shown in FIGS. 3-4 , the interactive digital TV front-end high-definition audio and video interface system of this embodiment includes a service station 500 , a digital TV front-end 100 , a cable 200 , an interface conversion module 300 and a digital TV terminal 400 . The service station 500 sends radio frequency signals carrying audio and video services. The digital TV front end 100 includes a wireless receiving module 110 , a signal processing module 120 and a signal interface module 130 . The wireless receiving module 110 of the digital TV front end receives radio frequency signals carrying audio and video services. In this embodiment, the wireless receiving module 110 includes an antenna. The signal processing module 120 of the digital TV front end 100 performs TDS-OFDM demodulation, decoding and synchroni...

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Abstract

The invention discloses an interactive type digital television front end high-definition audio-video interface system, which comprises a service station, a wireless receiving module, a signal processing module, a signal interface module, an interface converting module and a digital television terminal. The signal processing module comprises a carrier wave recovery unit, a Time Domain Synchronous Orthogonal Frequency Division Multiplex (TDS-OFDM) demodulation unit, a channel estimation unit, a synchronous recovery unit, a decoding unit and a synchronous recovery module. The wireless receiving module receives radio frequency signals carrying audio-video service transmitted by the service station. The signal processing module performs TDS-OFDM demodulation, decoding, and synchronous processing to the radio frequency signals, so as to obtain and output audio-video signals. The signal interface module receives and transmits the audio-video signals. The interface converting module converts the audio-video signals. The digital television terminal receives the audio-video signals converted by the interface converting module. The audio-video interface system of the invention can receive and process the radio frequency signals with high reliability to obtain high quality audio-video signals, the system integration degree is high, the network construction cost is low, the convergence error is small, and the convergence time is short.

Description

technical field [0001] The present invention relates to the technical field of digital television, and more particularly relates to an interactive digital television front-end high-definition audio and video interface system. Background technique [0002] At present, digital television terrestrial broadcasting (Digital Television Terrestrial Broadcasting, DTTB) has reached the stage of realization, and there are mainly three kinds of DTTB transmission standards announced in the world: the ATSC standard formulated by the Advanced Television System Committee (ATSC) in the United States , Digital Video Terrestrial Broadcasting-Terrestrial (DVB-T) in Europe, and Integrated Service Digital Broadcasting-Terrestrial (ISDB-T) in Japan. Based on the in-depth research on these three terrestrial digital TV systems, Tsinghua University proposed a terrestrial digital TV broadcast transmission system based on Time Domain Synchronous Orthogonal Frequency Division Multiplex (TDS-OFDM) modul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/236H04N5/44H04N7/64H04L27/26H04N19/89
Inventor 李明斌
Owner DONGGUAN NISTAR TRANSMITTING TECH CO