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Front end high definition audio and video interface device for interactive digital television and access method

A technology for digital TV and video interface, applied in the direction of digital video signal modification, TV, pulse modulation TV signal transmission, etc., can solve problems such as insufficiency, achieve the effect of small convergence error, reduce user cost, and improve system integration

Inactive Publication Date: 2009-04-01
DONGGUAN NISTAR TRANSMITTING TECH CO
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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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  • Front end high definition audio and video interface device for interactive digital television and access method
  • Front end high definition audio and video interface device for interactive digital television and access method
  • Front end high definition audio and video interface device for interactive digital television and access method

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Embodiment Construction

[0033] Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements.

[0034] refer to image 3 , an interactive digital TV front-end high-definition audio and video interface device in this embodiment includes a wireless receiving module 110 , a signal processing module 120 and a signal interface module 130 . The wireless receiving module 110 receives radio frequency signals carrying audio and video services. The wireless receiving module 110 includes an antenna. The signal processing module 120 performs TDS-OFDM demodulation, decoding and synchronization processing on the radio frequency signal received by the wireless receiving module 110 to obtain audio and video signals, and outputs the audio and video signals. The signal interface module 130 receives the audio and video signals output by the signal processing module 120 .

[0035] In detail, refer to Figure 4 , the signal processi...

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Abstract

The invention discloses a front end high definition audio and video frequency interface apparatus for interactive type digital TV. The front end high definition audio and video frequency interface apparatus for interactive type digital TV comprises a wireless receiving module, signal processing module and signal interface module. The wireless receiving module receives radio frequency signal carrying audio and video frequency service. The signal processing module TDS-OFDM demodulates, decodes and synchronously processes the radio frequency signal received by radio receiving module, and acquires audio and video frequency signal and outputs the audio and video frequency signal. The signal receiving module receives audio and video frequency signal outputted by the signal processing module. The inventive high definition audio and video frequency interface apparatus for interactive type digital TV can receives and processes radio frequency signal in high reliability and acquires high quality audio and video frequency signal. The inventive device has high integration level, small convergence error and short convergence time. The invention simultaneously discloses an interactive type digital TV high definition audio and video frequency access method for front end system.

Description

technical field [0001] The present invention relates to the technical field of digital television, and more specifically relates to an interactive digital television front-end high-definition audio and video interface device and a method for accessing the high-definition audio and video. 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 Synch...

Claims

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Application Information

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IPC IPC(8): H04N7/24H04N7/62H04N7/64H04J11/00H04L27/32H04N19/89
Inventor 李明斌
Owner DONGGUAN NISTAR TRANSMITTING TECH CO
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