mimo type dvb-t set top box with subtitle processing function

Abstract

The invention relates to an MIMO (multiple-input multiple-output)-type DVB-T(Digital Video Broadcasting-Terrestrial) set top box with a caption processing function, which comprises a plurality of receiving antennae, an audio playing module and a video playing module, wherein the receiving antennae are used for receiving an MIMO-type DVB-T signal so as to play an audio signal in the MIMO-type DVB-T signal on the audio playing module and to play a video signal and caption display data in the MIMO-type DVB-T signal on the video playing module. By adopting the MIMO-type DVB-T set top box with the caption processing function, playing of digital audio, video and captions can be realized on an MIMO-type DVB-T set top box with a plurality of antennae.

Description

technical field [0001] The invention relates to the field of digital television, in particular to a MIMO type DVB-T set-top box with subtitle processing function. Background technique [0002] MIMO (Multiple-Input Multiple-Out-put) system is a core technology applied to 802.11n. 802.11n is IEEE's new wireless LAN technology following 802.11b\a\g, with a speed of up to 600Mbps. At the same time, proprietary MIMO technology can improve the performance of existing 802.11a / b / g networks. This technology was first proposed by Marconi in 1908, who used multiple antennas to suppress channel fading. According to the number of antennas at both ends of the transceiver, compared to the ordinary SISO (Single-InputSingle-Output) system, MIMO can also include SIMO (Single-InputMulti-ple-Output) system and MISO (Multiple-InputSingle-Output) system. MIMO stands for Multiple Input Multiple Output, and is widely adopted in the fourth-generation mobile communication technology standards, suc...

AI Technical Summary

Problems solved by technology

[0003] The terrestrial digital television broadcasting DVB-T receiver of existing single-antenna reception is owing to often being used on the mobile vehicle that comprises taxi, bus, for the people who take the vehicle to pass the boring idle time, obtain the goods that oneself need simultaneously However, due to the characteristics of fast moving speed and unstable location of mobile vehicles including taxis and buses, they may move to places far away from the transmission center. Due to the fading of the signal, the received signal will be very weak, The problem of poor TV quality has affected the normal broadcasting of information. Therefore, it is a development trend of current terrestrial TV reception technology to use MIMO technology for vehicle-mounted DVB-T receivers. In addition, since DVB broadcast signals use subtitles as independent audio , The specific content of the video is disseminated, and its reception has certain professionalism and complexity. There are few digital TV receivers with subtitle processing on the market.

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