CN2938639Y - TV receiver with DVB-T digital signal receiving function - Google Patents
TV receiver with DVB-T digital signal receiving function Download PDFInfo
- Publication number
- CN2938639Y CN2938639Y CNU2006200884200U CN200620088420U CN2938639Y CN 2938639 Y CN2938639 Y CN 2938639Y CN U2006200884200 U CNU2006200884200 U CN U2006200884200U CN 200620088420 U CN200620088420 U CN 200620088420U CN 2938639 Y CN2938639 Y CN 2938639Y
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Abstract
The utility model discloses a television receiver with the function of receiving DVB-T digital signals. A digital decoding board and an analog signal processing main board are arranged into the television receiver, a digital high-frequency head is arranged on the digital decoding board to receive digital television signals from a television station; a demodulator receives digital signals from the digital high-frequency head, demodulates the signals and exports the TS stream signals; a digital decoder decodes the TS stream signals from the demodulator, generates analog audio signals and analog video signals and exports them to the analog signal processing main board. The television receiver of the utility model enables a user to watch DVB-T digital television programs via the television set directly without a set top box by building the DVB-T receiving processing circuit into the television set, reducing cost and saving space. Only with a remote controller, the user can complete all operations to the television set, increasing the using convenience of the television set.
Description
Technical field
The utility model relates to a kind of improvement of TV set circuit, specifically, relates to a kind of TV set circuit that has built-in DVB-T digital received function.
Background technology
DVB-T is the received terrestrial digital broadcasting standard that formulate in Europe, and the area of having opened the DVB-T received terrestrial digital broadcasting at present is more and more, and except that Europe, all start broadcasting in succession in areas such as Australia, Taiwan, Vietnam, and China also starts broadcasting in the part city successively.But, all be to receive for this DVB-T received terrestrial digital broadcasting at present by adding the DVB-T set-top box, re-use a television set as display terminal, carry out the broadcast of digital program.This design that adds set-top box needs to use two cover remote controllers that television set and set-top box are controlled respectively, and it is extremely inconvenient not only to operate, and takies the interior space, and cost is higher.
Summary of the invention
The utility model for solve in the prior art by the mode that adds set-top box in the television set outside realize the DVB-T terrestrial digital broadcasting signal the operation inconvenience that reception and broadcast brought, take the big problem of the interior space, a kind of novel television receiver with DVB-T digital signal receiving function is provided, by built-in DVB-T digital television signal receiving circuit in existing TV set circuit, need not to add under the prerequisite of external set top box, realizing that effectively the output of DVB-T digital television signal on television set shows.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of television receiver with DVB-T digital signal receiving function, in described television receiver, be built-in with digital decoding plate and analog mainboard, described digital decoding plate is provided with digital tuner, receives the digital television signal that TV station sends; Demodulator receives the digital signal of digital tuner output, it carry out channel demodulation system after, output TS stream signal; Digital decoder after the TS stream signal of demodulator output decoded, generates simulated audio signal and analog video signal and outputs in the described analog mainboard.
Described analog mainboard is provided with sound, video processing circuit, generates rgb signal after the analog video signal of described digital decoder output is decoded, and shows through the output of video amplifier circuit driving display; The simulated audio signal of described digital decoder output is admitted to the audio frequency diverter switch, after switching with other audio signals, is input to described sound, video processing circuit is handled, and then carries out the output of processing and amplifying rear drive loud speaker through power amplifier.
In order to guarantee the stability of digital signal required voltage in the digital decoding plate, in described television receiver, be provided with the power panel of powering for the digital decoding plate separately.The remote signal receiving circuit links to each other with sound, video processing circuit with described digital decoder respectively.
For the application program to digital decoder is stored, and the intermediate data that generates in the digital decoder running is reliably preserved, on described digital decoder, be connected with FLASH and SDRAM memory respectively.Wherein, the FLASH memory is stored the application program of digital decoder, and the SDRAM memory is preserved service data.
Compared with prior art, advantage of the present utility model and good effect are: the utility model is by the built-in circuit of digital decoding cheaply in common CRT television set, the DVB-T digital television signal is received the decode processing, generate the audio signal and the vision signal of simulation, and then utilize after original analog mainboard is handled sound, vision signal in the television set, realize the broadcast output of DVB-T digital television program by CRT monitor and loud speaker.Television receiver of the present utility model can directly be watched the DVB-T digital television program by television set without set-top box by the DVB-T receiving processing circuit is built in the television set, has reduced cost, has saved the space.The user is when watching the DVB-T TV programme, and only remote controller of need use can be finished the whole operations to television set, has greatly improved the convenience that television set uses.
Description of drawings
Fig. 1 is the schematic block circuit diagram with DVB-T digital signal receiving function television receiver.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.
TV receiver circuit of the present utility model is built-in with digital decoding plate and analog mainboard two parts, wherein, the digital decoding plate is mainly finished the demodulation sign indicating number of digital signal, comprises parts such as digital tuner, demodulator and digital decoder, referring to shown in Figure 1.The DVB-T digital television signal that sends from TV station receives by digital tuner, after process COFDM demodulator PN2020AT carry out channel demodulation system, generation TS stream signal is sent into digital decoder AVIA-9700 and is carried out demultiplexing and MPEG-2 source coding, final output CVBS vision signal and simulated audio signal, replace vision signal and audio signal that original analog radio frequency circuit solves respectively, send into the analog mainboard and handle, and the broadcast output of driving display and loud speaker realization TV programme.
Described digital decoder AVIA-9700 is except carrying out the decoding processing the still CPU of digital processing part, responsible generation operation system interface OSD and response human-computer dialogue simultaneously to the digital signal of input.The output of described digital decoder AVIA-9700 connects described analog mainboard through one group of bar connector, and the simulation sound of output, vision signal are sent into the analog mainboard and carried out back level processing.Described analog mainboard is provided with sound, video signal preprocessor OM8370, audio/video diverter switch HEF4052, video amplifier circuit and audio frequency power amplifier chip AN7522.Wherein, the vision signal of digital decoder AVIA-9700 output is input to 40 pin of sound, video signal preprocessor OM8370, carry out video decode after, generate rgb signal from 51,52,53 pin output, after video amplifier circuit amplifies, drive the work of CRT picture tube, output video image.The audio signal of digital decoder AVIA-9700 output is sent into the input of audio frequency diverter switch HEF4052, after selecting to switch with the audio signal of other AV sources, YUV terminal, the input of S-VIDEO terminal, be input to sound, video signal preprocessor OM8370 handles, and then after power amplifier chip AN7522 carries out power amplification, drive loud speaker output audio signal.
Remote-control receiving circuit N101 receives the infrared signal that remote controller sends, send into digital decoder AVIA-9700 and sound, video signal preprocessor OM8370 respectively, because there is not the branch of master/slave CPU, for avoiding taking place the remote control conflict, button on the remote controller is divided, a part is specialized in digital decoder AVIA-9700 and is used, and remaining part is specialized in sound, video signal preprocessor OM8370 uses, and both all do not do response for the opposing party's straighforward operation.During division, consider that most operation all finishes in digital decoder AVIA-9700, therefore, the button of distributing to digital decoder AVIA-9700 is more, and the button of distributing to sound, video signal preprocessor OM8370 only is a direct election key of adjusting image, volume etc.So both made things convenient for user's operation, exempted the trouble that to use two remote controllers simultaneously, the problem of also effectively having avoided two cover style menus to show simultaneously.
In order to guarantee the stability of digital signal required voltage in the digital decoding plate, being provided with in described television receiver is separately the power panel that the digital decoding plate is powered, and output 3.3V, 5V, 12V direct voltage provide working power for each chip in the digital decoding plate.
For the application program of digital decoder AVIA-9700 is stored, and the intermediate data that generates in the digital decoder AVIA-9700 running is reliably preserved, described digital decoder AVIA-9700 links to each other with the SDRAM memory with FLASH respectively.Wherein, the FLASH memory is stored the application program of digital decoder AVIA-9700, and the SDRAM memory is preserved the mass data that produces in the running.
The utility model is by the built-in receiving circuit of DVB-T cheaply in common CRT TV, can directly use television set to watch the DVB-T digital television signal without set-top box, have significant advantages such as circuit structure is simple, cost is low, effectively expanded the additional function of tv product.Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection range of the present utility model.
Claims (6)
1. the television receiver with DVB-T digital signal receiving function comprises the analog mainboard, it is characterized in that: be built-in with the digital decoding plate in described television receiver, described digital decoding plate is provided with
The numeral tuner receives the digital television signal that TV station sends;
Demodulator receives the digital signal of digital tuner output, it carry out channel demodulation system after, output TS stream signal;
Digital decoder after the TS stream signal of demodulator output decoded, generates simulated audio signal and analog video signal and outputs in the described analog mainboard.
2. the television receiver with DVB-T digital signal receiving function according to claim 1, it is characterized in that: described analog mainboard is provided with sound, video processing circuit, receive the simulated audio signal and the analog video signal of described digital decoder output, the analog video signal back of decoding is generated rgb signal, show through the output of video amplifier circuit driving display; Simulated audio signal is handled after power amplifier amplifies, driven loud speaker output.
3. the television receiver with DVB-T digital signal receiving function according to claim 2, it is characterized in that: the simulated audio signal of described digital decoder output is sent into the audio frequency diverter switch, be input to described sound, video processing circuit after switching with other audio signals, and then export through power amplifier processing and amplifying rear drive loud speaker.
4. the television receiver with DVB-T digital signal receiving function according to claim 1 and 2 is characterized in that: be provided with the power panel of powering for the digital decoding plate separately in described television receiver.
5. the television receiver with DVB-T digital signal receiving function according to claim 2 is characterized in that: the remote signal receiving circuit links to each other with sound, video processing circuit with described digital decoder respectively.
6. the television receiver with DVB-T digital signal receiving function according to claim 5 is characterized in that: described digital decoder links to each other with the SDRAM memory with FLASH respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200884200U CN2938639Y (en) | 2006-08-23 | 2006-08-23 | TV receiver with DVB-T digital signal receiving function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200884200U CN2938639Y (en) | 2006-08-23 | 2006-08-23 | TV receiver with DVB-T digital signal receiving function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2938639Y true CN2938639Y (en) | 2007-08-22 |
Family
ID=38362668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200884200U Expired - Fee Related CN2938639Y (en) | 2006-08-23 | 2006-08-23 | TV receiver with DVB-T digital signal receiving function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2938639Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951473A (en) * | 2010-09-08 | 2011-01-19 | 深圳金亚太科技有限公司 | Computer receiving device for digital television |
| CN101990071A (en) * | 2009-07-29 | 2011-03-23 | 晨星软件研发(深圳)有限公司 | Demodulator and method capable of automatically calibrating output and television receiver thereof |
| CN102244753A (en) * | 2011-06-30 | 2011-11-16 | 广州视源电子科技有限公司 | Television-based hybrid television program operation realization method and television |
| CN103002333A (en) * | 2012-12-07 | 2013-03-27 | 四川长虹电器股份有限公司 | Method for controlling set top box (STB) through smart TV |
| CN104967890A (en) * | 2015-08-05 | 2015-10-07 | 张峰 | Intelligent flat digital mobile television |
-
2006
- 2006-08-23 CN CNU2006200884200U patent/CN2938639Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101990071A (en) * | 2009-07-29 | 2011-03-23 | 晨星软件研发(深圳)有限公司 | Demodulator and method capable of automatically calibrating output and television receiver thereof |
| CN101951473A (en) * | 2010-09-08 | 2011-01-19 | 深圳金亚太科技有限公司 | Computer receiving device for digital television |
| CN102244753A (en) * | 2011-06-30 | 2011-11-16 | 广州视源电子科技有限公司 | Television-based hybrid television program operation realization method and television |
| CN103002333A (en) * | 2012-12-07 | 2013-03-27 | 四川长虹电器股份有限公司 | Method for controlling set top box (STB) through smart TV |
| CN104967890A (en) * | 2015-08-05 | 2015-10-07 | 张峰 | Intelligent flat digital mobile television |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070822 Termination date: 20100823 |