CN2669525Y - Analogue and digital signal compatible receiving television receiver circuit - Google Patents
Analogue and digital signal compatible receiving television receiver circuit Download PDFInfo
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- CN2669525Y CN2669525Y CNU2003201212067U CN200320121206U CN2669525Y CN 2669525 Y CN2669525 Y CN 2669525Y CN U2003201212067 U CNU2003201212067 U CN U2003201212067U CN 200320121206 U CN200320121206 U CN 200320121206U CN 2669525 Y CN2669525 Y CN 2669525Y
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Abstract
An analog and digital signal compatible receiving television circuit belongs to the television circuit technique. It comprises a television signal receiving circuit, a previewing playing and peripheral circuit, a broad-band video amplifying circuit, a kinescope and a microprocessor. The television signal receiving circuit comprises an analog signal receiving and processing circuit and a digital signal receiving circuit, both of which output YPBPR signal. The analog signal receiving and processing circuit comprises a radio-frequency head demodulating circuit, a DPTV-3D video decoding circuit, a picture format converting circuit, a motion compensating circuit, a brightness and chromaticity edge enhancing circuit and a digit analog converting circuit. The digital signal receiving circuit comprises a digit radio-frequency head circuit, a digital TV chip set, an MPEG2 decoding circuit, an audio decoding circuit and a digit analog converting circuit. The type of the previewing playing circuit is TA1316AN, and the type of the broad-band video amplifying circuit is TDA6120. The analog and digital signal compatible receiving television circuit realizes the simultaneously reception of the digital television signal and the analog television signal, which is convenient for the users receiving and watching the digital and analog television programs.
Description
Technical field
The utility model belongs to the TV set circuit technical field, more particularly relates to the improvement of the compatible TV set circuit that receives of analog and digital signal.
Background technology
Digital television is the main flow of following TV development, but simulated television also can not eliminated in short-term fully.Therefore, this just needs a kind of circuit of design, makes same television set can accept Digital Television and analog television program simultaneously, to satisfy user's demand.
The purpose of this utility model, receive when just being to realization Digital Television and anolog TV signals, design a kind of circuit form, digital TV receiver module and simulated television receiving circuit are integrated in the same movement, and adopt unified software control, finish the combination that Digital Television and analog television program receive, make things convenient for user's watching Digital Television and analog television program.
Summary of the invention
In order to achieve the above object, the utility model comprises TV signal receiving circuit, the previewing that is connected with receiving circuit is put and peripheral circuit, put with previewing and the wideband video amplifying circuit that peripheral circuit is connected, the picture tube that is connected with the wideband video amplifying circuit and microprocessor that foregoing circuit is controlled.TV signal receiving circuit comprises analog signal reception and treatment circuit and digital signal receiving circuit, and two circuit are all exported the YPBPR signal and imported preheating amplification circuit then.
Analog signal receives and treatment circuit comprises that at least the antenna, the demodulation of tuner video/audio, DPTV-3D video decode, image format conversion, motion compensation, brightness and the chroma edge that connect successively strengthen, all circuit of digital-to-analogue conversion, and the output line frequency is 33.75kHz, field frequency are the YPBPR signal of 60Hz, 1920 * 1080I format compatible of output signal and high definition digital television.Digital signal receiving circuit comprises antenna, digital tuner demodulation, Sti7000 and Sti4600 digital television chip group, MPEG2 decoding, audio decoder, all circuit of digital-to-analogue conversion that connects successively at least, and the output line frequency is 33.75kHz, field frequency are that 60Hz, form are the Standard Digital Television YPBPR signal of 1920 * 1080I.
Preheating amplification circuit is the TA1316AN type, and the wideband video amplifying circuit is the TDA6120 type.
Because digital television program is different with the simulated television receiving system,, must adopt two cover reception systems therefore for realizing Digital Television and simulated television compatibility.First cover is the TV receiving system that present simulated television adopts.It can realize the reception of analog television program, then the vision signal that receives is handled, and the output line frequency is 33.75kHz, field frequency are the YPBPR signal of 60Hz.Second cover is digital TV receiving system.The Digital Television radiofrequency signal is carried out demodulation, demultiplexing by receiving system, carries out the MPEG2 decoding then, forms digital audio-video signal, and by the D/A conversion, the output line frequency is 33.75kHz, field frequency are the YPBPR signal of 60Hz.The analog-and digital-TV YPBPR signal of output by preheating amplification circuit TA1316AN, carries out switch switching and signal clamper, amplification, processing such as brightness, contrast control, by wideband video amplifying circuit TDA6120, drive tube cathode then, realize the demonstration of content of TV program.
Task of the present utility model comes to this and finishes.
The compatible TV set circuit that receives of the utility model digital and analog signaling has realized the reception of high definition digital television program, the development need that had both met Digital Television, having satisfied the needs that current analog television program is watched again, is the inexorable trend of recent television set development.It can television image viewing effect that provide convenience to consumers in general, high definition, high-quality, can be widely used in television set design, produce.
Description of drawings
Fig. 1 is a block diagram of the present utility model.
Fig. 2 is its circuit theory diagrams.
Embodiment
Embodiment 1.The compatible TV set circuit that receives of a kind of analog and digital signal.As shown in Figure 1, it comprises TV signal receiving circuit, the previewing that is connected with receiving circuit is put and peripheral circuit (1), put with previewing and the wideband video amplifying circuit (2) that peripheral circuit (1) is connected, the picture tube (3) that is connected with wideband video amplifying circuit (2) and microprocessor (4) that foregoing circuit is controlled.TV signal receiving circuit comprises that analog signal receives and treatment circuit (5) and digital signal receiving circuit (6), and two circuit are all exported the YPBPR signal and imported preheating amplification circuit then.Preheating amplification circuit (1) is the TA1316AN type, and wideband video amplifying circuit (2) is the TDA6120 type.
Analog signal receives and treatment circuit (5) comprises that at least the antenna, the demodulation of tuner video/audio, DPTV-3D video decode, image format conversion, motion compensation, brightness and the chroma edge that connect successively strengthen, all circuit of digital-to-analogue conversion, and the output line frequency is 33.75kHz, field frequency are the YPBPR signal of 60Hz, 1920 * 1080I format compatible of output signal and high definition digital television.
Digital signal receiving circuit (6) comprises antenna, digital tuner demodulation, Sti7000 and Sti4600 digital television chip group, MPEG2 decoding, audio decoder, all circuit of digital-to-analogue conversion that connects successively at least, and the output line frequency is 33.75kHz, field frequency are that 60Hz, form are the Standard Digital Television YPBPR signal of 1920 * 1080I.
The simulated television circuit is to carrying out video decode from the vision signal of cable TV and external video equipment (as DVD, video tape recorder etc.), and decoding chip adopts the DPTV-3D chip of Shanghai TRIDENT company.This chip has 3 road video interfaces, comprises signals such as S terminal signals, YCBCR, and has one road video decode circuit, has realized direct digital decoding to vision signal.This chip carries out Digital Image Processing with decoded digital video signal, realizes functions such as image format conversion, motion compensation, brightness, chroma edge enhancing, carries out digital-to-analogue conversion then, the YPBPR signal of output simulation.This signal output line frequency is 33.75kHz, field frequency are the YPBPR signal of 60Hz, with 1920 * 1080I format compatible of high definition digital television, are convenient to the switching with the signal of digital TV receiver module output.
The Digital Television receiving circuit is according to the signal difference (as wireless digital signal, cabled digital signal and satellite digital TV signal) that receives, the function that circuit is realized is also different, what we adopted at present is the Digital Television receiving circuit of ground ATSC standard, and tuner adopts the integrated digital television high frequency head of ALPS company.This tuner receives the radiofrequency signal of ATSC standard, carry out demodulation output digital TV TS stream signal, carry out digital signal demultiplexing, MPEG2 decoding, audio decoder etc. by STi7000, Sti4600 digital television chip group again, carry out digital-to-analogue conversion then, the standard digital television signals YPBPR of output 1920 * 1080I, 60Hz.
Two-way YPBPR signal enters the TA1316AN chip and carries out the video selection, and carry out brightness clamper, contrast, brightness, colourity control etc., convert rgb signal then to and amplify, output to wideband video amplifying circuit TDA6120, amplify rear drive tube cathode display image.
Shown in Figure 2, analog radio-frequency signal is sent into integral high frequency head through antenna end and is demodulated television video and audio signal.Audio signal is sent into the loud speaker pronunciation through acoustic processing with after amplifying; Television video frequency signal and outside incoming video signal are sent into the DPTV-3D chip of TRIDENT company and are decoded after selecting, the output line frequency is 33.75kHz, and field frequency is the YPBPR signal of 60Hz.The YPBPR signal is coupled to P8, P9, the P10 pin of TA1316AN respectively by capacitor C 878, C845, C846; Frequency is 33.75 line synchronizing signal is sent into TA1316AN through resistance R 843 a P12 pin; Frequency is the field sync signal of 60HZ is sent into TA1316AN through resistance R 844 a P13 pin.
Digital signal demodulates the digital TV TS stream signal through the integrated digital television high frequency head of ALPS company, carry out digital signal demultiplexing, MPEG2 decoding, audio decoder by STi7000, Sti4600 digital television chip group then, carry out digital-to-analogue conversion again, output format is the standard digital television signals YPBPR of 1920 * 1080I, 60Hz.The YPBPR signal is coupled to P3, P4, the P5 pin of TA1316AN respectively by capacitor C 841, C842, C843; Frequency is 33.75 line synchronizing signal is sent into TA1316AN through resistance R A17 a P16 pin; Frequency is the field sync signal of 60HZ is sent into TA1316AN through resistance R A16 a P15 pin.
The YPBPR signal of the YPBPR signal of analog gained, synchronizing signal and Digital Signal Processing gained, synchronizing signal are selected one road signal by CPU by I2C control and are carried out brightness, colourity processing in TA1316AN, change into R, G, B signal through matrixer again.Previewing is exported by P43, P42, the P41 pin of TA1316AN respectively after putting processing, the rgb signal of output is penetrated subsequently through V811, V812, V813 respectively, look and put integrated circuit TDA6120 and carry out processing and amplifying through giving the broadband behind resistance R A87, RA88, the RA89 again, the signal after the processing is given the picture tube display image.
The line synchronizing signal of handling is exported to TC4538BP by the P26 pin of TA1316AN and is carried out horizontal synchronizing pulse expansion, stable.The line synchronizing signal of the P26 pin output of TA1316AN is sent P5, the P11 pin of TC4538BP after the anti-phase amplification of V820, the synchronizing signal of handling well is from P6, the output of P9 pin of TC4538BP, and the P6 pin outputs signal to the row-field scanning chip and uses for row-field scanning.The signal of P9 pin output is given V821 anti-phase amplification through RA97, and the P24 pin of sending into TA1316AN through R850 uses for TA1316AN as row synchronous feedback signal again.
The field sync signal of handling is exported to the row-field scanning process chip by the P27 pin of TA1316AN and is used for row-field scanning.
The osd signal of CPU output is handled through P37, P38, P39 pin that capacitor C 862, C863, C864 send into TA1316AN, to demonstrate custom menu on screen.
The data pin P31 of TA1316AN links to each other by data wire, the clock line of resistance R 857, R856 and CPU with clock pin P30, so that CPU is to initialization and the control of TA1316AN.
The base stage that the ABL signal that the row-field scanning treatment circuit feeds back is given V809 through VD814, VD813, R854, R829 again through sending into the P53 pin of TA1316AN behind VD808, C882, the R833, is carried out brilliance control by TA1316AN inside after the V809 output.
Claims (5)
1. the compatible TV set circuit that receives of an analog and digital signal, it comprises TV signal receiving circuit, the previewing that is connected with receiving circuit is put and peripheral circuit, put with previewing and the wideband video amplifying circuit that peripheral circuit is connected, the picture tube that is connected with the wideband video amplifying circuit and microprocessor that foregoing circuit is controlled, it is characterized in that said TV signal receiving circuit comprises analog signal reception and treatment circuit and digital signal receiving circuit, two circuit are all exported the YPBPR signal and are imported preheating amplification circuit then.
2. according to the compatible TV set circuit that receives of the described analog and digital signal of claim 1, it is characterized in that said analog signal receives and treatment circuit comprises that at least the antenna, the demodulation of tuner video/audio, DPTV-3D video decode, image format conversion, motion compensation, brightness and the chroma edge that connect successively strengthen, all circuit of digital-to-analogue conversion, the output line frequency is 33.75kHz, field frequency are the YPBPR signal of 60Hz, 1920 * 1080I format compatible of output signal and high definition digital television.
3. according to claim 1 or the compatible TV set circuit that receives of 2 described analog and digital signals, it is characterized in that said digital signal receiving circuit comprises antenna, digital tuner demodulation, Sti7000 and Sti4600 digital television chip group, MPEG2 decoding, audio decoder, all circuit of digital-to-analogue conversion that connects successively at least, the output line frequency is 33.75kHz, field frequency are that 60Hz, form are the Standard Digital Television YPBPR signal of 1920 * 1080I.
4. according to claim 1 or the compatible TV set circuit that receives of 2 described analog and digital signals, it is characterized in that said preheating amplification circuit is the TA1316AN type, the wideband video amplifying circuit is the TDA6120 type.
5. according to the compatible TV set circuit that receives of the described analog and digital signal of claim 3, it is characterized in that said preheating amplification circuit is the TA1316AN type, the wideband video amplifying circuit is the TDA6120 type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201212067U CN2669525Y (en) | 2003-12-23 | 2003-12-23 | Analogue and digital signal compatible receiving television receiver circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201212067U CN2669525Y (en) | 2003-12-23 | 2003-12-23 | Analogue and digital signal compatible receiving television receiver circuit |
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| Publication Number | Publication Date |
|---|---|
| CN2669525Y true CN2669525Y (en) | 2005-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2003201212067U Expired - Fee Related CN2669525Y (en) | 2003-12-23 | 2003-12-23 | Analogue and digital signal compatible receiving television receiver circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006081732A1 (en) * | 2005-02-04 | 2006-08-10 | Tao Dong | Integrative video signal switching device and method thereof |
-
2003
- 2003-12-23 CN CNU2003201212067U patent/CN2669525Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006081732A1 (en) * | 2005-02-04 | 2006-08-10 | Tao Dong | Integrative video signal switching device and method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |