Household multimedia gateway system based on DTV-VLC key technology

Abstract

The invention provides a household multimedia gateway system based on the DTV-VLC key technology, and the system comprises a terrestrial digital information standard receiver which is used for receiving a DTMB (Digital Terrestrial Multimedia Broadcasting) signal emitted by an outdoor radio broadcasting base station or a DVB-C (digital video broadcasting) signal connected through a wired cable. The terrestrial digital information standard receiver is integrated with a DTMB / DVB-C demodulation unit and a PLC adaptive unit, and is used for receiving an home-entry DVB-C signal, carrying out the demodulation and decoding of the home-entry DVB-C signal, restoring a digital television video code stream, and modulating the digital television video code stream into a TDS-OFDM signal. The terrestrial digital information standard receiver comprises a tuner, a local oscillator drive analog-digital converter, an automatic gain control unit for the statistics of energy of received signals, an interpolation filtering unit, a channel equalizer, and a Hibert filter. The system effectively reduces the actual engineering implementation software and hardware complexity of a DTV-VLC integration broadcast system, improves the transmission efficiency, reduces the processing time delay, simplifies the production process of multimedia gateway equipment, and reduces the production cost.

Description

[0001] [technical field] [0002] The invention relates to the technical field of home multimedia gateways, in particular to a home multimedia gateway system based on DTV-VLC key technology, which has good stability, simple structure, high transmission efficiency and can effectively reduce costs. [0003] [Background technique] [0004] At present, most of the products on the market are integrated products of multiple modules and multiple systems, the customer experience is relatively poor, and the system hardware is highly complex, and the product stability is poor, and the research and development of key technologies for digital TV network and visible light communication fusion transmission is currently domestic There are no similar products out there. [0005] Based on the above problems, how to make full use of the effective transmission bandwidth of power line and visible light communication, improve the efficiency of spectrum utilization, and effectively overcome the bott...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the products on the market are integrated products of multiple modules and multiple systems, the customer experience is relatively poor, and the system hardware is highly complex, and the product stability is poor, and the key technology research and development of digital TV network and visible light communication fusion transmission is currently domestic There are no similar products out there

Images