CN2377779Y - TV set with digital video broadcasting receiving function - Google Patents
TV set with digital video broadcasting receiving function Download PDFInfo
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- CN2377779Y CN2377779Y CN99215192U CN99215192U CN2377779Y CN 2377779 Y CN2377779 Y CN 2377779Y CN 99215192 U CN99215192 U CN 99215192U CN 99215192 U CN99215192 U CN 99215192U CN 2377779 Y CN2377779 Y CN 2377779Y
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Abstract
The utility model relates to a TV with a digital video broadcasting receiving function, which comprises a DVB controller composed of a DVB radio frequency head, an MPEG decoding device, a video and audio encoding device, a CPU device, an I/O port expanding device and a DVB memory. A program source button is pushed, programs can be mutually switched among the TV, an audio / video external interface and digital television broadcast. As a DVB set top box and an ordinary color TV receiver are effectively integrated into one unit, production cost is saved, and the reliability of the complete machine is added.
Description
The utility model relates to a kind of television equipment, particularly a kind of television set of energy receiving digital video broadcasting (DVB) program.
Existing television set is used to finish different functions with the DVB set-top box, and the former is with receiving the common simulation TV signal; The latter is used for the receiving digital video broadcast singal, behind the MPEG-2 digital decoding, after it is encoded into three primary colors R.G.B signal, Y/C or full TV CVBS signal, imports the corresponding interface of television set again.The user owing to need television set to work with DVB set-top box two cover systems, uses two different remote controllers to carry out function control respectively when watching the DVB program, brings user's inconvenience especially.
The purpose of this utility model is to provide a kind of general color television receiver and DVB set-top box two cover systems is integrated, and only remote controller of need carries out the television set of the band digital video broadcasting receiving function of function control, to overcome above-mentioned defective.
The television set of the band digital video broadcasting receiving function that the utility model proposes, comprise: a television high frequency head unit, be used for the RF high-frequency signal of tuning reception, obtain tv-if signal by mixing, filtering and give and put device in the TV and handle from the common simulation TV; Put device in the TV, be used to receive the tv-if signal of processing, send to video, chrominance processing arrangement after forming full television image signal from the output of television high frequency head unit; Video, chrominance processing arrangement, processing is from the full television image signal of putting device in the TV, or handle picture signal from television set Y/C, A/V interface arrangement, produce tristimulus image R.G.B signal and row, an oscillator signal is sent to the television video display drive apparatus; A television video display drive apparatus, tristimulus image R.G.B that video, chrominance processing arrangement are sent here and row, an oscillator signal amplify, handle, and provide the television video display unit required various signals; A television video display unit is used to show the tristimulus image R.G.B signal from the television video display drive apparatus; Y/C, A/V interface arrangement are used to receive the coherent signal of external equipment, give video, the chrominance processing arrangement of television set; A DVB tuner device, be used for the radio frequency DVB signal of tuning reception from satellite or cable TV, by the T/S after mixing demodulation stream, give mpeg decode, video encoding, CPU device, its DVB high frequency handle required control signal by mpeg decode, video encoding, CPU device through I
2The C bus is set; Mpeg decode, video encoding, CPU device, be used to receive T/S stream from the output of DVB tuner device, through mpeg decode, produce tristimulus image R.G.B signal through video coding again, send video, chrominance processing arrangement, be used to receive the control signal of this switch dish device generation of sending into via I/O mouth expanding unit, or receive the remote signal of sending into from remote control, or reception is from the signal of TV partial circuit, after judgment processing, produce control signal corresponding, through I/O mouth expanding unit or I
2The C bus removes to control relevant circuit operation; An I/O mouth expanding unit, the running of the whole TV part of control under the instruction of mpeg decode, video encoding, CPU device; An electric supply installation provides the television set each several part required power supply; This machine key device, the control signal of generation button correspondence; A remote control produces remote signal; A DVB memory device is used to store application program and DVB and common simulation television channel information.
Because the television set of the band digital video broadcasting receiving function that the utility model proposes, DVB set-top box, general color television receiver are combined together effectively, be a shared cover electric power system, shared machine button, remote control only overlap E with a cover cpu controller,
2The PROM memory just can constitute complete color TV set.Therefore for manufacturer, can save great amount of cost.For the user, use a remote controller, the cover interface that operation is unified, easily.With regard to engineering, product is formed an organic whole, has eliminated redundancy, has improved reliability of products.
Below in conjunction with drawings and Examples the utility model is further described.
Fig. 1 is the circuit structure block diagram of the utility model embodiment.
Fig. 2 is the layout block diagram of the circuit board of the utility model embodiment.
Fig. 3 is the circuit diagram of the utility model embodiment.
Fig. 4 is the I/O expansion circuit diagram of the utility model embodiment.
Fig. 5 is the LC electromagnetic immunity lattice network figure of the utility model embodiment.
Fig. 6 is that the TV programme of the employing TV control plug-in card of the utility model embodiment is switched schematic diagram.
Fig. 7 is that the TV programme of the employing DVB control plug-in card of the utility model embodiment is switched schematic diagram.
With reference to Fig. 1, Fig. 2, the television set that can receive the DVB program that the utility model embodiment proposes comprises: television high frequency head unit 1, put device 2 in the TV, video, chrominance processing arrangement 3, television video display drive apparatus 4, television video display unit 5, DVB tuner device 6, mpeg decode, video encoding, CPU device 7, I/O mouth expanding unit 8, DVB memory device 9, electric supply installation 12, this machine key device 13, remote control 14, Y/C, A/V interface arrangement 15.
Promptly require to receive the DVB program and require again to receive ordinary tv programme in order to satisfy some client, and some client only requires and can receive ordinary tv programme.Therefore on same circuit board, mix " DVB controls plug-in card " and " TV control plug-in card " two kinds of control plug-in card, to make the television set of difference in functionality.When selecting " DVB controls plug-in card " for use, can receive DVB program and ordinary tv programme, when selecting " TV control plug-in card " for use, can only receive ordinary tv programme.
" DVB controls plug-in card " by DVB tuner device 6 and mpeg decode, video encoding, CPU device 7, I/O mouth expanding unit 8, and DVB memory 9 constitutes; Correspondingly on circuit board, be provided with " DVB controls card insertion base "; When inserting " DVB controls plug-in card ", control the safe and orderly operation of whole system by the CPU of mpeg decode, video encoding, CPU device 7." TV control plug-in card " is made of TV CPU device 9 and TV memory device 10, corresponding be provided with on circuit board " TV control card insertion base "; When inserting " TV control plug-in card ", the CPU of TV CPU device 9 control whole system is moved safe and orderlyly.
With reference to Fig. 3, present embodiment circuit diagram and operation principle are as follows: " TV control plug-in card " and " DVB controls plug-in card " is mutual exclusion, i.e. synchronization, and television set is only plugged a kind of plug-in card.The I of plug-in card and mainboard
2The C bus links to each other, and " TV control plug-in card " reach the control line that " DVB controls plug-in card " control the television set function and be electrically connected on mainboard.For the convenience of describing, with the description that combines of two plug-in cards.
Signal input (RF) termination of " television high frequency head " is received the high-frequency carrier signal from OCTV antenna or cable TV.It carries out the selection of television reception frequency range by microprocessor ST9291 in " TV control plug-in card " or by waveband selection signal VHF1, VHF2 from " DVB controls plug-in card " middle I/O mouth expansion 8255A, and according to its " tuning voltage " (VTURE) tuning voltage of control end input input carry out the tuning of television channel, the TV RF signals of tuning locking produces tv-if signal (IF) behind mixing and filtering, intermediate-freuqncy signal is put integrated STV8223B in the filtering of sound table enters.In put integrated STV8223B automatic gain thresholding by automatic gain (AGC) control pin control from I/O mouth expansion 8255A in the microprocessor ST9291 in " TV control plug-in card " or " DVB controls plug-in card ", (Audio std1, Audiostd2) input is selected by " control of sound accompaniment standard " for the television field frame standard.The vision signal that external " audio/video " (AV) imported with from the audio/video signal after the demodulation of high frequency carrier TV, in put among the integrated STV8223B and switch, diverter switch by its " TV/outer signal " (TV/AV) control pin controlled.Through in after putting integrated STV8223B demodulation vision signal or by the vision signal of external AV mouth input through in put integrated STV8223B the 11st pin be sent to the integrated STV2118B of video/colourity and be decoded into TV tristimulus image signal.The integrated STV2118B of video/colourity has two picture signal inputs, signal can be imported or import with three primary colors R.G.B signal form from its 12nd, 13,14 pin with Y/C or full TV DVBS signal form from its 20th pin, and this depends on the setting of the integrated STB2118B internal switch of video/colourity register.The setting of switch register is by its I
2C bus port (SDA, control data decision SCL), I
2The control data of C bus is provided by the microprocessor ST9291 in " TV control plug-in card ", or provided by microprocessor STi5500 in " DVB controls plug-in card ", thereby the I/O of the integrated ST2118B of video/colourity directly is controlled by the application program in the microprocessor.The 36th pin output row oscillator signal of the integrated STV2118B of video/colourity is sent to row energization to line output, produces and drives the required filament supply of (CRT) cathode ray tube, the grid curtain utmost point, assembles the utmost point, anode high voltage and CRT line circle deflection current.The 35th pin output field oscillator signal of the integrated STV2118B of video/colourity is sent to the field excitation output of showing up, and produces to drive the required electric current of CRT field deflection coil.The power supply of the integrated STV2118B of video/colourity is exported through integrated TDA8138A the 6th pin of voltage stabilizing by the one group+15V power supply in the television set Switching Power Supply, get through the three terminal regulator voltage stabilizing again, whether integrated TDA8138A the 6th pin of voltage stabilizing export+and 12V voltage is that mains switch (POWER ON/OFF) control pin by I/O expansion 8255A in microprocessor ST9291 or " DVB the control plug-in card " in " TV control plug-in card " determines, have only after microprocessor STi5500 receives user's start-up command in microprocessor ST9291 in " TV control plug-in card " or " DVB controls plug-in card ", mains switch (POWER ON/OFF) control pin places the ON state, the integrated STV2118A of video/colourity is powered on, produce row, the field oscillator signal, promptly TV is in open state.This machine button receives two road keyboard scanning signals (KS4, KS5) from the middle I/O expansion of microprocessor ST9291 or " DVB controls plug-in card " in " TV control plug-in card " 8255A, sends microprocessor ST9291 or " DVB controls plug-in card " middle I/O expansion 8255A in the key scan output (KS1, KS2, KS) to " TV control plug-in card " with keyboard state information.Microprocessor STi5500 in microprocessor ST9291 in " TV control plug-in card " or " DVB controls plug-in card " receives the signal from the TV partial circuit, after judgment processing, produce control signal corresponding, after electromagnetic immunity is isolated, remove to control relevant circuit operation.It can pass through the I/O mouth control signal, also can pass through I
2(SDA SCL) transmits the C bus.Receiver of remote-control sytem receives the coding control from infrared remote-control emitter, middle fracture by microprocessor STi5500 in microprocessor ST9291 or " DVB controls plug-in card " in " TV control plug-in card " starts the remote control command that remote control reception program in time receives the handling interrupt mouth, the DVB tuner receives from the descending high-frequency carrier signal of the LNB of satellite earth antenna, after tuning mixing, four phase frequency shift keying (QPSK) demodulation, recover dynamic image expert group (MPEG2) the transport stream that defines (TS).It is through I by microprocessor STi5500 in " DVB controls plug-in card " that the DVB high frequency is handled required control signal
2(SDA SCL) sets the C bus.LNB+22V power supply provides by the TV Switching Power Supply.Random memory KM416V1000C is the SDRAM of 1M * 16bit, is used for " DVB controls plug-in card " microprocessor STi5500 demodulation MPEG2 image usefulness, and read-only memory DD28F032SA is the FLASHROM of 2M * 16bit, is used to store application program.Memory 24C256 is that electricity can be wiped and can write (E
2PROM) memory is used to store DVB and television channel information.Memory 24C256 is by I
2C bus (SDA, SCL) control.I/O expansion 8255A in " DVB controls plug-in card " directly links to each other on mainboard with the pin of " TV control plug-in card " middle microprocessor ST9291 identical function, make microprocessor STi5500 in " DVB controls plug-in card " after the expansion of I/O expansion 8255A, whole television circuit is controlled.Therefore when producing the television set that has reception DVB function, can save the microprocessor ST9291 and the memory 24C08 that are exclusively used in the control television set.
Microprocessor STi5500 in " DVB controls plug-in card " is ultra-large integrated circuit, and it comprises the RISC high speed processor ST20 of a 32bit, a mpeg decoder, a video encoder.Wherein high speed processor ST20 is used to control the operation of the whole system that comprises I/O expansion 8255A, mpeg decoder is used to receive the TS stream of processing from the DVB tuner, and decoded vedio data becomes tristimulus image R.G.B signal, is sent to the integrated STV2118B of video/colourity through video encoder encodes.
STi5500 in " DVB controls plug-in card " adopts the 40MHz clock, the television analog signals therewith partial circuit is produced very strong electromagnetic, and the control bus that the microprocessor STi5500 in " DVB controls plug-in card " links to each other with peripheral read-only memory DD28F032SA, random memory KM416V1000C, data/address bus, address bus also are subjected to the electromagnetic interference from television set easily when exchange high speed data.Adopting the television set of resistance extreme ray pipe (CRT) itself is exactly a very strong electromagnetic interference source.Its Switching Power Supply adopts switching pulse to drive, and horizontal output stage also adopts switching pulse signal to drive, and the pulse voltage peak-to-peak value that is produced can reach 1000V (14kHz).These switching pulse signals have very wide frequency band on frequency domain.The switching signal of high pressure high bandwidth has constituted serious threat to " DVB controls plug-in card " like this.Such situation once appearred in the practice of present embodiment, if do not adopt an effective measure, and register DRAM, the E of the microprocessor ST9291 inside in the microprocessor STi5500 in " DVB controls plug-in card ", " the TV control plug-in card "
2Data among the PROM can be upset, and cause program running undesired, cause the deadlock phenomenon.Moreover also there is spark phenomenon in the negative electrode of television set CRT sometimes, produces very strong electromagnetic interference during sparking, can destroy the operation of system program equally.Take 2 quarantine measures, one is the inductance capacitance isolation filter on increasing between plug-in card and the mainboard for this reason, isolates the conducted interference of electricity; It two adopts metal-back packing with plug-in card, with the interference of shield electromagnetic.
In order to save cost, the power supply of " DVB controls plug-in card " is provided by the television set Switching Power Supply, one group of coil 7V power rectifier is after the integrated PQ3RD3 voltage stabilizing of voltage stabilizing becomes 3.3V voltage to use for the microprocessor STi5500 in " DVB controls plug-in card ", the LNB power supply is by independent one group+22V power supply power supply, power supply is connected to the interface of " DVB controls plug-in card ", isolates with inductance capacitance.
With reference to Fig. 4, the realization principle of the I/O port expansion circuit of present embodiment is as follows.Dynamic memor (DRAM) KM416V1000C, flicker memory (PLASH ROM) DD28F032SA and I/O expansion 8225A common data bus (data 0～data 7), address bus (address A0, A1) and some control buss.Dynamic memor (DRAM) KM416 V1000C selects port and column selection 0 and column selection 1 port selected by row, flicker memory (FLASH ROM) DD28F032SA selects port CE3 selected by flicker memory sheet, I/O expansion 8255A selects port CE1 selected by sheet, therefore mix corresponding chip selection signal according to different addresses and just can accurately carry out addressing the peripheral above-mentioned device of STi5500, because the microprocessor STi5500 inside in " DVB controls plug-in card " does not contain the required pin of I/O expansion 8255A write operation, alternative at this OE pin with the microprocessor STi5500 in " DVB control plug-in card ", so just can carry out write operation to the I/O mouth that I/O expands 8255A.With reference to Fig. 5, electromagnetic immunity (EMC) interface is made up of inductance capacitance (LC), and inductance (L) has buffer action to high-frequency signal, prevents High-frequency Interference, and electric capacity (C) has high-frequency signal bypass effect over the ground, works to do the absorbing high-frequency interference signal.Adopt of the EMC measure of LC network as this plug-in card.
With reference to Fig. 6, present embodiment is when adopting " TV control plug-in card ", and people press " program source " button, and program will be by switching between TV 20 and " audio/video " external interface 21 as shown in the figure.
With reference to Fig. 7, present embodiment is when adopting " DVB controls plug-in card ", and people press " program source " button, and program will switch mutually between TV 30, " audio/video " external interface 31 and digital television broadcasting 32 threes.Reach the money of only spending a covering device, use a remote controller, watch all programs.
Claims (3)
1. television set with the digital video broadcasting receiving function, it comprises: the television high frequency head unit, put device in the TV, chroma video processing unit, television video display drive apparatus, the television video display unit, Y/C, A/V interface arrangement, electric supply installation, this machine key device, remote control is characterized in that: also comprise:
A DVB tuner device, be used for the radio frequency DVB signal of tuning reception from satellite or cable TV, by the T/S after mixing demodulation stream, give mpeg decode, video encoding, CPU device, its DVB high frequency handle required control signal by mpeg decode, video encoding, CPU device through I
2The C bus is set;
Mpeg decode, video encoding, CPU device, be used for receiving T/S stream from DVB tuner device [6] output, through mpeg decode, produce tristimulus image R.G.B signal through video coding again, send video, chrominance processing arrangement, be used to receive the control signal of this switch dish device generation of sending into via I/O mouth expanding unit, or receive the remote signal of sending into from remote control, or reception is from the signal of TV partial circuit, after judgment processing, produce control signal corresponding, through I/O mouth expanding unit or I
2The C bus removes to control relevant circuit operation;
An I/O mouth expanding unit is used for the running of the whole TV part of control under the instruction of mpeg decode, video encoding, CPU device;
A DVB memory device is used for reading or writing application program, DVB and common simulation television channel information under the control of mpeg decode, video encoding, CPU device.
2. the television set of band digital video broadcasting receiving function according to claim 1, it is characterized in that: DVB tuner device and mpeg decode, video encoding, CPU device, I/O mouth expanding unit and DVB memory constitute " DVB controls plug-in card ", correspondingly are provided with " DVB controls card insertion base " on circuit board.
3, the television set of band digital video broadcasting receiving function according to claim 2 is characterized in that: also be provided with " TV control card insertion base " on circuit board, " DVB controls card insertion base " and TV control card insertion base " with the I of circuit board
2The C bus links to each other, and " TV control card insertion base " reach the control line that " DVB controls card insertion base " control the television set function and be electrically connected on circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99215192U CN2377779Y (en) | 1999-06-23 | 1999-06-23 | TV set with digital video broadcasting receiving function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99215192U CN2377779Y (en) | 1999-06-23 | 1999-06-23 | TV set with digital video broadcasting receiving function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2377779Y true CN2377779Y (en) | 2000-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99215192U Expired - Lifetime CN2377779Y (en) | 1999-06-23 | 1999-06-23 | TV set with digital video broadcasting receiving function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2377779Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1305288C (en) * | 2003-11-04 | 2007-03-14 | 圆刚科技股份有限公司 | Digital type set-top box |
| CN1333579C (en) * | 2005-06-09 | 2007-08-22 | 海信集团有限公司 | Circuit for implementing compatibility of multiple display modules using MAP network |
| CN100367778C (en) * | 2003-11-26 | 2008-02-06 | 厦门华侨电子股份有限公司 | A control device for set-top box and host computer |
| CN100399316C (en) * | 2000-05-31 | 2008-07-02 | 派威公司 | Universal STB architectures and control method |
| CN100576888C (en) * | 2004-12-10 | 2009-12-30 | 康佳集团股份有限公司 | A kind of general signal processing platform that is applied to little demonstration back projection TV |
| CN101212583B (en) * | 2006-12-31 | 2011-01-05 | 康佳集团股份有限公司 | Decoding circuit in integrated analog/digital TV receiver |
| CN108632655A (en) * | 2017-03-25 | 2018-10-09 | 张祖豪 | A kind of anti-visual fatigue TV |
-
1999
- 1999-06-23 CN CN99215192U patent/CN2377779Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100399316C (en) * | 2000-05-31 | 2008-07-02 | 派威公司 | Universal STB architectures and control method |
| CN1305288C (en) * | 2003-11-04 | 2007-03-14 | 圆刚科技股份有限公司 | Digital type set-top box |
| CN100367778C (en) * | 2003-11-26 | 2008-02-06 | 厦门华侨电子股份有限公司 | A control device for set-top box and host computer |
| CN100576888C (en) * | 2004-12-10 | 2009-12-30 | 康佳集团股份有限公司 | A kind of general signal processing platform that is applied to little demonstration back projection TV |
| CN1333579C (en) * | 2005-06-09 | 2007-08-22 | 海信集团有限公司 | Circuit for implementing compatibility of multiple display modules using MAP network |
| CN101212583B (en) * | 2006-12-31 | 2011-01-05 | 康佳集团股份有限公司 | Decoding circuit in integrated analog/digital TV receiver |
| CN108632655A (en) * | 2017-03-25 | 2018-10-09 | 张祖豪 | A kind of anti-visual fatigue TV |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: XIAMEN OVERSEAS CHINESE ELECTRONIC ENTERPRISE CO. Free format text: FORMER OWNER: HUAQIAO ELECTRONIC ENTERPRISE CO., LTD., XIAMEN Effective date: 20070119 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070119 Address after: 361006 Huang Hongtao, 22 Huli Avenue, Xiamen, Fujian Patentee after: Xiamen Overseas Chinese Electronic Co., Ltd. Address before: 361006 Huang Hongtao, 22 Huli Avenue, Xiamen, Fujian Patentee before: Xiamen Huaqiao Electronic Enterprise Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |