CN201418118Y - Digital television radiofrequency signal converter - Google Patents

Abstract

A digital television radiofrequency signal converter relates to a converter for changing various digital television radiofrequency signals of different standard to digital television radiofrequency signal of single standard. The converter includes a housing, a signal input end, a signal output end, a power input end, a command input end, a demodulating and encoding unit arranged in the converter and communicated with the signal input end, said unit inputs TS signals after processing to an encoding and modulating unit, and the signals are inputted to the signal output end after processing of the encoding and modulating unit; a command signal demodulating and power supply unit demodulates command signals inputted from the command input end and transmits to a control unit, and the control unit controls the work command signal demodulation and power supply unit of the demodulation and encoding unit to be linked with the power input end by a bus. The converter is capable of solving a compatibility problem of DVB-S set-up boxes effectively, and a subscriber may receive different radio frequency digit signals by using only one DVB-S set-up box.

Description

A kind of Digital Television radio-frequency signal transformer

Technical field

The utility model relates to a kind of signal converter, particularly relates to a kind of transducer that the Digital Television radiofrequency signal of multiple various criterion is converted to single standard Digital Television radiofrequency signal.

Background technology

From simulated television to the high definition digital television transition, be the transition of a great-leap-forward, be difficult to direct realization, because change digital signal in case stop to transmit analog signal, all simulated televisions all can not use so now, be unpractical so settle at one go.Currently used solution is to convert digital radio signal to analog signal that common TV can receive by a set-top box.The benefit of doing like this is both to have reduced decay and the interference of signal in transmission course, thereby has improved the quality of TV receiving signal effectively, has successfully solved the problem of simulated television and digital signal compatibility again.

DVB-S is the digital television standard that the whole world is used the earliest and popularized, and the DVB-S set-top box worldwide has the manufacturer and the customer group of quantity maximum.But along with the development of technology, new signal transmission standard constantly appears again in recent years, such as: DVB-S2, DVB-T, ATSC, ISDB-T and GB 20600-2006 or the like.Because the disunity of digital television signal standard, cause the user when receiving different signals, must use different signal converters, must use the DVB-S set-top box during such as reception DVB-S signal, must use corresponding D VB-S2 set-top box and receive up-to-date satellite digital TV, so both suitable is loaded down with trivial details, very uneconomical is unfavorable for the popularization of Digital Television again.

Summary of the invention

The purpose of this utility model is to provide a kind of Digital Television radio-frequency signal transformer that the digital television signal of various criterion can be converted to the digital radio signal of single standard.

The utility model adopts following technical scheme:

A kind of Digital Television radio-frequency signal transformer comprises housing, signal input part, signal output part, power input, command input end comprises in the device: electronic tuning unit, demodulation and decoding unit, DiSEqC command signal are separated mediation power supply unit, coding and modulating unit, control unit.

Described electronic tuning unit with link with signal input part (2), described electronic tuning unit imports outer signals into corresponding demodulation and decoding unit, TS signal input coding and modulating unit after described demodulation and decoding unit will be handled, signal is encoded handles back input signal output (3) with modulating unit, described control unit and coding and modulating unit, electronic tuning unit, demodulation and decoding unit, the demodulation of DiSEqC command signal links to each other with power supply unit, demodulation of described DiSEqC command signal and power supply unit will import control unit into after the command signal demodulation of command input end (5) input, demodulation of described DiSEqC command signal and power supply unit and power input (4) link and be each functional unit power supply.

The beneficial effects of the utility model:

By various rf digital signal being converted into the standard digital radiofrequency signal that standard DVB-S set-top box can receive, solved the compatibility issue of DVB-S set-top box effectively, made the user only just can receive different TV RF digital signals with a DVB-S set-top box.And simple in structure, easy to connect, with low cost, stability is strong.

Description of drawings

Fig. 1 is a product schematic diagram of the present utility model;

Wherein: 1-housing, 2-signal input part, 3-signal output part, 4-power input, 5-command input end.

Fig. 2 is a cut-away view of the present utility model.

Embodiment

As shown in Figure 1, signalization input 2 on the housing 1, signal output part 3, power input 4, command input end 5.Wherein signal output part 3, power input 4, and command input end 5 links with the RF end of set-top box, and power input 4 links with the antenna feed end of set-top box.

Described signal output part 3 is connected on the RF end of set-top box, and described power input 4 is by the power supply of set-top box antenna feed, and demodulation of DiSEqC command signal and power supply unit are connected on the RF end of set-top box.

As shown in Figure 2, demodulation code element output TS (Transponder Stream) data are given coding and modulating unit, control unit links to each other by control bus with decoding unit with channel demodulation, the DiSEqC command signal is separated the mediation power supply unit and is linked to each other with control unit, gives each circuit unit power supply simultaneously.

Demodulation of DiSEqC command signal and power supply unit will import control unit into after the DiSEqC command signal demodulation of command input end 5 inputs, this control unit is provided with the reception parameter, promptly controls electronic tuning unit and carries out frequency-selecting and the demodulation code parameters is set; Correspondingly, after input signal enters the electronic tuning unit frequency-selecting by signal input part 2, intermediate frequency or baseband signal are sent into demodulation and decoding unit, after demodulation and decoding unit processing, enter coding and signal is modulated to the DVB-S signal of the manageable fixedly frequency of set-top box, pass to the RF end of set-top box by signal output part 3 with modulating unit.

Demodulation of described DiSEqC command signal and power supply unit, demodulation is superimposed upon the DiSEqC order from the expansion of DVB-S set-top box on the RF signal, and it is sent into control unit, control unit can be provided with the channel parameter of demodulation and decoding unit, coding and modulating unit.Simultaneously, demodulation of described DiSEqC command signal and power supply unit are obtained from feed and the required various voltages of conversion the utility model, reach figure signal chnnel coding and modulation system and export to the purpose of DVB-S set-top box program receiving.

Claims (1)

1. a Digital Television radio-frequency signal transformer comprises housing (1), signal input part (2), and signal output part (3), power input (4), command input end (5) is characterized in that:

Comprise in the device: electronic tuning unit, demodulation and decoding unit, DiSEqC command signal are separated mediation power supply unit, coding and modulating unit, control unit;

Described electronic tuning unit with link with signal input part (2), described electronic tuning unit imports outer signals into corresponding demodulation and decoding unit, TS signal input coding and modulating unit after described demodulation and decoding unit will be handled, signal is encoded handles back input signal output (3) with modulating unit, described control unit and coding and modulating unit, electronic tuning unit, demodulation and decoding unit, the demodulation of DiSEqC command signal links to each other with power supply unit, demodulation of described DiSEqC command signal and power supply unit will import control unit into after the command signal demodulation of command input end (5) input, demodulation of described DiSEqC command signal and power supply unit and power input (4) link and be each functional unit power supply.

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