CN201557184U - Digital TV set - Google Patents

Abstract

The utility model relates to a digital TV set. The digital TV set comprises a radio frequency signal processing circuit, a main circuit and a display unit which are electrically connected in sequence; the radio frequency signal processing circuit comprises a tuner and a channel decoding module, wherein the tuner is connected between the radio frequency signal input end and the main circuit of the digital TV set, and the channel decoding module is used for switching analog signals into transport stream and arranged between the other end of the tuner and the main circuit, the tuner and the channel decoding module can be components separated from each other and also can be integrated into a whole and used as an integrated tuner, and the both the tuner and the channel decoding module have the same functions. The digital TV set adopts the integrated product and a single-chip processing scheme, the channel decoding module is added, the transport stream is directly output, de-multiplex and MPEG decoding are adopted and accomplished further so that the TS data stream is broken down into video, audio-frequency and data information which is led to a passage respectively for treatment, the use is simpler, the functions are more powerful, and the utility model is advantageous in cost.

Description

A kind of digital television

Technical field

The utility model relates to electronic circuit, is specifically related to a kind of digital television.

Background technology

Digital Television just is meant that all being to use digital television signal or all signals of this system are propagated to all links of emission, transmission, reception from the studio all is the television genre of propagating by the digital stream that is made of 0,1 numeric string.In the market, be included in Brazil, the many solutions of the user terminal of digital television system with " top box of digital machine+analog machine ", the user uses very inconvenient, for meeting the needs of, change the present situation of present set-top box+simulated television, need the all-in-one of exploitation DA compatibility, this case is exactly to produce in the case.And Brazilian domestic teaching machine standard SBTVD is new standard at the early-stage, still is in the process of improving, and the technology of " top box of digital machine+analog machine " solution is grasped mostly in Japanese manufacturer at present, monopolization relatively.The exploitation of this case further can also break through the blockade of foreign vendors such as Japan.

The utility model content

The utility model technical issues that need to address are, how a kind of digital television is provided, and can not use the direct receiving digital television signal of top box of digital machine, simultaneously compatible simulated television.

Technical problem of the present utility model solves like this: make up a kind of digital television, comprise the radio frequency signal processing circuit, main circuit and the display unit that are electrically connected successively, described radio frequency signal processing circuit comprises that being used between the tuner that is connected between digital television radio-frequency (RF) signal input end and the described main circuit and another output of described tuner and the described main circuit transfers analog signal to and transmits the channel decoding module that flows (TS stream), because digital television signal is generally through encryption, so channel decoding module has also comprised deciphering.

The digital television that provides according to the utility model, being used for the chip that TS stream is handled and Digital Television is controlled in the described main circuit is chip piece, promptly adopt single chip solution, save cost, this chip connects the nonvolatile memory (NVM memory) of internal memory, flash memory and built-in handling procedure.

According to the digital television that the utility model provides, described tuner and channel decoding module are separating component or integral type integrated device.

According to the digital television that the utility model provides, described Digital Television also comprises power amplification unit and the loudspeaker that are connected successively with described main circuit.

According to the digital television that the utility model provides, described Digital Television also comprises the signal output part that is connected with described main circuit.

According to the digital television that the utility model provides, described signal output part is sound, video (AV) output.

According to the digital television that the utility model provides, described Digital Television also comprises other signal inputs except that described radio-frequency (RF) signal input end that are connected with described main circuit

Described other signal input parts are AV/ high definition video (SVIDEO)/Europe socket (SCART) inputs.

Described other signal input parts are computer (PC)/hard disk (HD) inputs.

Described other signal input parts are high-resolution digital multimedia interface (HDMI) inputs.

The digital television that the utility model provides, the integration product that adopts, on the basis of tuner simulation output, increase channel decoding module output TS stream in addition, further adopt the single-chip processing scheme to finish demultiplexing, mpeg decode, thereby the TS data flow is resolved into video, audio frequency, data message, and introduction channel is handled respectively, makes system more simple, with better function, cost more has superiority.

Description of drawings

Fig. 1 is the circuit theory diagrams of a kind of specific embodiment of the utility model.

Embodiment

The utility model digital television adopts the single-chip processing scheme, the scheme that is different from set-top box+analog machine, its radio-frequency input signals processing section is made up of tuner TUNER, channel decoding module two parts, mainly finishes the reception of Digital Television (DTV) signal, demodulation.Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described in detail, thereby protection range of the present utility model is made more explicit defining so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that.

As shown in Figure 1, the digital television target market of this specific embodiment is Brazil, is made up of 3 parts:

1, radio-frequency input signals processing section:

2, master chip control system:

3, display part.

Wherein: the master chip control system selects for use the MSD209 chip of Mstar manufacturer to realize, is connected with program storage with internal memory; The display part adopts LCD to show.

The radio-frequency input signals processing section, corresponding Brazilian SBTVD standard is made up of tuner (TUNER), channel decoding module two parts, mainly finishes the reception of Digital Television (DTV) signal, demodulation.

Radio frequency (RF) signal is received by tuner (TUNER), because the integration product that this case is adopted, channel decoding module is integrated in the tuner (TUNER), can directly export serial TS stream, carries out next step decoding for the MSD209 chip and uses.

The MSD209 chip uses the decoding software of supporting Brazilian SBTVD standard simultaneously.By demodulation multiplexer, mpeg decoder, say that the TS data flow resolves into video, audio frequency, data message, introduction channel is handled respectively.This MSD209 chip and internal software are supported following function:

● TV (TV) control

● signal source is selected

● the color decoding

● 3D rendering

● DVB-T (H.264/MEPG-2) standard signal

● the PAL/SECAM standard

● electric program menu (EPG)

● DOBLY﹠amp; H.264 standard decoding

● digital audio is handled

● computer (PC)/digital signal input

● the DVI/HDMI/HDCP input

● the ME/MC input

● Dual LVDS output

In addition, this digital television also comprises and above-mentioned various inputs, corresponding jack or the socket of output.

The above; it only is embodiment of the present utility model; but protection range of the present utility model is not limited thereto; any those of ordinary skill in the art are in the disclosed technical scope of the utility model; variation or the replacement that can expect without creative work all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range that claims were limited.

Claims (10)

1. digital television, comprise the radio frequency signal processing circuit, main circuit and the display unit that are electrically connected successively, it is characterized in that described radio frequency signal processing circuit comprises that being used between the tuner that is connected between digital television radio-frequency (RF) signal input end and the described main circuit and another output of described tuner and the described main circuit transfers analog signal to channel decoding module that TS flows.

2. according to claims 1 described digital television, it is characterized in that being used for the chip that TS stream is handled and Digital Television is controlled in the described main circuit is chip piece, this chip connects the nonvolatile memory of internal memory, flash memory and built-in handling procedure.

3. according to claims 1 described digital television, it is characterized in that described tuner and channel decoding module are separating component or integral type integrated device.

4. according to claims 1 described digital television, it is characterized in that described digital television also comprises power amplification unit and the loudspeaker that are connected successively with described main circuit.

5. according to claims 1 described digital television, it is characterized in that described digital television also comprises the signal output part that is connected with described main circuit.

6. according to claims 5 described digital televisions, it is characterized in that described signal output part is the AV output.

7. according to claims 1 described digital television, it is characterized in that described digital television also comprises other signal input parts except that described radio-frequency (RF) signal input end that are connected with described main circuit.

8. according to claims 7 described digital televisions, it is characterized in that described other signal input parts are AV/SVIDEO/SCART inputs.

9. according to claims 7 described digital televisions, it is characterized in that described other signal input parts are PC/HD inputs.

10. according to claims 7 described digital televisions, it is characterized in that described other signal input parts are HDMI inputs.

Images