Mobile phone TV terminal and implementation method thereof

A mobile phone TV and terminal technology, applied in the field of mobile TV terminals and its realization, can solve the problems of broadband mobile phone TV filter passband interference, etc., and achieve the effect of improving viewing effect, improving receiving signal-to-noise ratio, and improving receiving performance

Inactive Publication Date: 2010-12-15
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the main purpose of the present invention is to provide a mobile phone TV terminal and its implementation method, which can solve technical problems such as introducing interference in the passband of the broadband mobile phone TV filter

Method used

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  • Mobile phone TV terminal and implementation method thereof
  • Mobile phone TV terminal and implementation method thereof
  • Mobile phone TV terminal and implementation method thereof

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Embodiment Construction

[0029] Since the TV programs of the TV station are transmitted in the bandwidth of about 8MHZ through COFDM, the bandwidth is much smaller than the 470MHz to 800MHz mobile phone TV band width given by the standard. figure 1 For the ordinary band-pass filter shown, considering that the mobile phone TV roams between different regions and there is no device that can be adjusted in the filter, the pass-band width of the band-pass filter must meet the standard given by the mobile phone of 470MHz to 800MHz. The width of the TV band, at this time, although the mobile phone communication signal and low-frequency noise signals can be filtered out, useless noise signals in the passband will still be introduced. if used figure 2 As shown in the filter with adjustable center frequency, because the filter has a device with adjustable physical characteristics inside, when the mobile phone TV terminal receives a TV program signal from a certain TV station, the corresponding control signal i...

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Abstract

The invention discloses a mobile phone TV terminal and an implementation method thereof, which are used for solving the technical problems of introducing disturbance to the filter transmission bands of a wide band mobile phone TV and the like. In the mobile phone TV terminal, physical parameters of an adjustable device in the adjustable bandpass filter can be changed by using an adjustable bandpass filter and by outputting a control signal corresponding to an effective TV program frequency band by a control unit, so that the centre frequency and the passband bandwidth of the adjustable bandpass filter can be changed to make the centre frequency and the passband bandwidth of the adjustable bandpass filter consistent with the centre frequency and the bandwidth of the TV program frequency band and make the adjustable bandpass filter only output narrowband TV signals corresponding to the TV program frequency band. The mobile phone TV terminal and the implementation method improve receiving SNR of a mobile phone TV, enhance the quality of receiving signals and improve the receiving performance of the mobile phone TV.

Description

technical field [0001] The present invention relates to the field of mobile TV technology, in particular to a mobile TV terminal and an implementation method thereof. Background technique [0002] Mobile TV refers to devices that use mobile phones as terminals and can receive and play digital TV. At present, there are four major mobile phone TV standards in the world: DVB-T (digital video broadcasting for terrestrial digital terrestrial video broadcasting), DVB-H (Digital Video Broadcasting Handheld digital video broadcasting), ISDB-T (integrated service digital broadcast-terrestrial terrestrial Comprehensive service digital broadcasting), CMMB (China Mobile Multimedia Broadcasting), etc., these major standards can work in the frequency band of about 470MHz to 800MHz in UHF (Ultrahigh Frequency, ultra high frequency), all adopt COFDM (coded orthogonal frequency Division multiplexing, coded orthogonal frequency division multiplexing) modulation method, transmits TV programs ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/44H04N5/50H04M1/725H04M1/72403
CPCH04N5/455H04N21/4383H04N5/50H04B1/18H04N21/6131
Inventor 杜天波孙井群马凯
Owner ZTE CORP
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