CN201118728Y - STB for simultaneous control of two TV sets - Google Patents

Abstract

The utility model relates to a set-top box controlling two televisions simultaneously, which comprises: a principal tone video decoder, a main program memory, a principal tone video amplification output, a main tuner and a COFDM demodulator and a power supply; and the set-top box also includes: a subordinate tone video decoder, a subordinate program memory, a subordinate tuner and a COFDM demodulator; the principal tone video decoder is in two-way connection with the subordinate tone video decoder, and the subordinate tone video decoder is connected with the principal tone video amplification output; and the set-top box has the functional effect that: one set-top box can satisfy the demand of customers for watching two TV programs simultaneously and independently.

Description

Can control the set-top box of 2 television sets simultaneously

Technical field

The utility model relates to a kind of set-top box, relates in particular to a kind of set-top box that can control 2 television sets simultaneously.

Background technology

Set-top box is used for receiving digital television signal, and change into the analog signal that the simulated television function receives, one of general set-top box only is used to watch Digital Television to connect a simulated television, when needs are watched two platform TV programme (independent fully) simultaneously, need two set-top box and two television sets.

As seen from Figure 1: general set-top box is by audio/video decoder, and memory under program (FLASH, SDRAM), audio frequency and video are amplified delivery, tuner and COFDM demodulator, major parts such as power supply are formed.Digital television signal is imported by tuner, through the demodulation of COFDM demodulator, by the MPEG2 decoder decode, converts anolog TV signals to again, exports to television set after the amplification.Memory under program is mainly used to store the program of set-top box, and SDRAM mainly is the buffer memory of MPEG2 view data simultaneously.This set-top box has only No. one decoding circuit, if the user need see two TV programme simultaneously, then must be used for seeing two programs respectively with two set-top box and two set-top box.

Summary of the invention

The utility model technical issues that need to address have provided a kind of set-top box that can control 2 television sets simultaneously, are intended to solve the above problems.

In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:

The utility model comprises: and keynote Video Decoder, main program memory (FLASH, SDRAM), the keynote video amplifies output, main tuner and COFDM demodulator, power supply; Also comprise: from audio/video decoder, from memory under program, from tuner and COFDM demodulator; Described keynote Video Decoder be connected from audio/video decoder is two-way, amplify output from audio/video decoder and keynote video and join.

Compared with prior art, the beneficial effects of the utility model are: with a set-top box, can satisfy the demand that the client independently sees two TV programme simultaneously.

Description of drawings

Fig. 1 is a set-top box module map in the prior art;

Fig. 2 is the utility model module map;

Fig. 3 the utility model wiring schematic diagram;

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

As seen from Figure 2: the utility model comprises: and keynote Video Decoder, main program memory (FLASH, SDRAM), the keynote video amplifies output, main tuner and COFDM demodulator, power supply; Also comprise: from audio/video decoder, from memory under program, from tuner and COFDM demodulator; Described keynote Video Decoder be connected from audio/video decoder is two-way, amplify output from audio/video decoder and keynote video and join.

The utility model has two-way independently to separate mediation accent decoding circuit respectively.The single channel function is the same with the common machine set top box functions, crux partly is that two-way can pass to slave with the parameter of main frame by communicating circuit, main frame shows the actions menu of two television sets respectively, main frame receives the remote controller signal, remote controller can be controlled principal and subordinate's machine simultaneously, and main frame is responsible for and will be passed to slave from machine control signal.

The utility model has mainly used following integrated circuit and Tuner

1, STI5518 supports MPEG2, the audio/video decoder of MP3;

2, STV0360 COFDM demodulator;

3，HY57V641620HG 64M?SDRAM；

4，M28W160-ECT-70?8M?Flash；

5, the stereo D/A converter of CS4334;

6, the LM833 audio frequency amplifier;

7, the M74HC4053 analog signal is switched;

8, DTT7590 Tuner high-frequency tuner;

9, LDlll7 power source conversion (LDO);

The utility model set-top box realizes that by a better simply mode connecing two television sets with same set-top box realizes seeing simultaneously two TV programme, TV signal is as long as insert main road, mainly obtain from the road TV signal from main road bypass output, as shown in Figure 3, among the figure: antenna 1, set-top box 2, power line 3.

Claims (1)

1. the set-top box that can control 2 television sets simultaneously comprises: keynote Video Decoder, main program memory, keynote video amplification output, main tuner and COFDM demodulator, power supply; It is characterized in that also comprising: from audio/video decoder, from memory under program, from tuner and COFDM demodulator; Described keynote Video Decoder be connected from audio/video decoder is two-way, amplify output from audio/video decoder and keynote video and join.

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