CN201134859Y - Television receiver capable of receiving terrestrial digital broadcast - Google Patents
Television receiver capable of receiving terrestrial digital broadcast Download PDFInfo
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- CN201134859Y CN201134859Y CNU2007201597265U CN200720159726U CN201134859Y CN 201134859 Y CN201134859 Y CN 201134859Y CN U2007201597265 U CNU2007201597265 U CN U2007201597265U CN 200720159726 U CN200720159726 U CN 200720159726U CN 201134859 Y CN201134859 Y CN 201134859Y
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- television receiver
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Abstract
The utility model discloses a radiotelevisor which can receive ground digital broadcasts, and comprises a television main board and a ground digital broadcast signal receiving circuit which is connected with the main board, wherein a digital radio-frequency head used for receiving cable digital radiofrequency signals sent by the television broadcast station is contained in the ground digital broadcast signal receiving circuit, a channel demodulator used for receiving digital intermediate frequency signals outputted by the digital radio-frequency head and used for generating TS code current and outputting the TS code current after carrying out the channel demodulating to the signals through adopting the a ground digital broadcast signal demodulating proposal which is corresponding with the national standard, a digital decoder, which is used for generating original audio and video frequency signals and outputting the signals to the main board of a television after carrying out the de-multiplexing to the TS code current which is outputted by the channel and is used for decoding the audio and video frequency signals. The radiotelevisor internally arranges the ground digital broadcast signal receiving circuit in a television, receives and decodes the ground digital broadcast signals, thereby, the direct receiving and displaying of ground digital broadcast signals by televisions is realized under the precondition of externally arranging non set-top box.
Description
Technical field
The utility model belongs to the television receiver technical field, specifically, relates to a kind of TV receiver circuit that receives the terrestrial digital broadcasting signal function that has.
Background technology
Received terrestrial digital broadcasting is the standard that formulate in Europe, comprise DVB-T (Digital VideoBroadcasting-Terrestrial, Digital Television Terrestrial Broadcasting) technology and DMB-TH (DigitalMultimedia TV Broadcasting-Terrestrial Handle, the digital multimedia television terrestrial broadcasting is handled) technology.The area of having opened 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 terrestrial digital broadcasting signal at present by the mode that adds 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.
The utility model content
The utility model for solve in the prior art by the mode that adds set-top box in the television set outside realize to 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 terrestrial digital broadcasting signal receiving function is provided, by built-in terrestrial digital broadcasting 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 terrestrial digital broadcasting signal on television receiver 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 that receives received terrestrial digital broadcasting comprises TV SKD and connected terrestrial digital broadcasting signal receiving circuit; Include in described terrestrial digital broadcasting signal receiving circuit: digital tuner receives the cable digital TV radiofrequency signal that TV station sends; Channel demodulator receives the digital medium-frequency signal of digital tuner output, adopt the ground digital television signal demodulation scheme that meets GB that it is carried out channel demodulation after, generate TS code stream and output; Digital decoder, the TS code stream of channel demodulator output carried out demultiplexing and audio/video decoding after, generate original audio-video signal and export TV SKD to.
Wherein, in described digital tuner, comprise tuner and analog to digital converter, described tuner receives the cable digital TV radiofrequency signal that TV station sends, be demodulated into analog if signal and transfer to analog to digital converter and carry out the conversion of analog signal to digital signal, and then by analog to digital converter output digital medium-frequency signal.
Further, described digital decoder is by the master chip on bus connecting channel demodulator and the TV SKD, with transfer instruction information.Described bus can be I
2C bus etc.
For make described television receiver can normal play the charge program, in described television receiver, also include Conditional Access Module, connect described digital decoder, after enciphered message in the TS code stream that digital decoder is received is decrypted processing, feed back to that digital demodulator carries out demultiplexing and audio/video decoding is handled.
Further again, described digital decoder connects the remote-control receiving circuit and the key circuit of television receiver inside, and the button triggering signal of remote control command that the reception remote-control receiving circuit sends and key circuit output is with response user operation.
In order to realize storage, in described terrestrial digital broadcasting signal receiving circuit, also include flash memory and dynamic random access memory, be connected the intermediate data that produces in the working procedure of storage digital decoder and the processing procedure respectively with described digital decoder.
In the utility model, described digital decoder preferably adopts high definition and SD digital television signal decoding chip to realize that output left and right acoustic channels digital audio and video signals and YCbCr color difference signal are to TV SKD.
Further again, described terrestrial digital broadcasting signal receiving circuit independently is arranged on the circuit board, forms the digital decoding plate; On described digital decoding plate and TV SKD, the general-purpose interface that can peg graft mutually is installed.
For under the situation of not changing the TV SKD circuit, realize that TV SKD is connected with the compatibility of conventional television signal dash receiver with above-mentioned digital decoding plate, in described general-purpose interface, not only include signal transmission pin according to the needs definition of communicating by letter of described digital decoding plate and TV SKD, also define the signal transmission pin that communicating by letter of with good grounds conventional television signal dash receiver and described TV SKD need define, to improve the versatility of TV SKD.
Compared with prior art, advantage of the present utility model and good effect are: the utility model is by built-in terrestrial digital broadcasting signal receiving circuit in television receiver, the ground digital broadcasting-television signal is received the decode processing, and then generation has the receivable audio signal of TV SKD now and vision signal is handled broadcast for TV SKD, thereby under the prerequisite that need not the peripheral hardware set-top box, realized the direct reception broadcast of television set to the ground digital broadcasting-television signal, reduce cost, saved the space.Simultaneously, the user is when watching the received terrestrial digital broadcasting TV programme, and only remote controller of need use can be finished the whole operations to television receiver, has greatly improved the convenience that television set uses.
After reading the detailed description of the utility model execution mode in conjunction with the accompanying drawings, other characteristics of the present utility model and advantage will become clearer.
Description of drawings
Fig. 1 is the internal circuit configuration schematic diagram of the television receiver of the received received terrestrial digital broadcasting that proposes of the utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
Television receiver of the present utility model is by increasing the terrestrial digital broadcasting signal receiving circuit on the cassette mechanism platform of existing television set, under the prerequisite of soft, hardware development cost minimum, reception, demodulation and decoding function have been realized to the ground digital broadcasting-television signal, thereby original audio signal before the generation coding and color difference signal are exported to cassette mechanism platform and are handled, and then have realized reception and the playing function of television receiver to terrestrial digital broadcasting signal.
Embodiment one, and referring to shown in Figure 1, present embodiment has specifically been enumerated a kind of basic comprising of described terrestrial digital broadcasting signal receiving circuit, comprises major parts such as digital tuner, channel demodulator and digital decoder.Wherein, in described digital tuner, include tuner and AD analog to digital converter two parts, receive the cable digital TV radiofrequency signal RF that TV station sends by tuner, after being demodulated into analog if signal (Simulation with I F), transfer to the AD analog to digital converter and carry out the conversion of analog signal, and then generation digital medium-frequency signal (digital IF) exports channel demodulator to digital signal.Channel demodulator adopts the ground digital television channels demodulation scheme that meets GB, realizes reception and demodulation to the received terrestrial digital broadcasting TV signal of GB C=1 and C=3780 various modes, and output TS code stream is to digital decoder.After described digital decoder carries out processing such as demultiplexing, audio-video signal decoding and audio-visual synchronization to the TS code stream, export original audio-video signal (being specifically as follows left and right acoustic channels digital audio and video signals and YCbCr aberration vision signal) to existing TV SKD, further handle for it and play.Wherein, described digital decoder can select the high definition of present main flow and SD digital television signal decoding chip to realize, finishing decoding, realize the differentiation of functions of modules and the product alienation of machine product according to the difference of decoded signal to high definition HD and SD SD signal.
Described digital decoder passes through I
2C bus connecting channel demodulator with to its transfer instruction information, is realized functions such as channel search, switching, zero clearing.Certainly, also can adopt other buses to realize being connected between digital decoders and the channel demodulator according to the concrete needs of chip chamber, the utility model is not limited thereto.
In order to realize storage, in described terrestrial digital broadcasting signal receiving circuit, also include FLASH flash memory and dynamic random access memory SDRAM, be connected the intermediate data that produces in the working procedure of storage digital decoder and the message source process process etc. respectively with described digital decoder.
In addition, handle in order to realize the remote control command that described terrestrial digital broadcasting signal receiving circuit sends the user and the reception of key command, described digital decoder also is connected with key circuit with the remote-control receiving circuit of television receiver inside respectively, the button triggering signal of remote control command that the reception remote-control receiving circuit sends and key circuit output is with accurate response user operation.
Simultaneously, have the function of broadcast numeral charge program, need to adopt Conditional Access Module C/A be decrypted processing, to reduce enciphered message to the TV signal that digital tuner receives in order to make television receiver.In the present embodiment, the Conditional Access Module C/A that connects television receiver inside by described digital decoder, its TS code stream that receives at first is transferred to after Conditional Access Module C/A is decrypted processing, and then its data message that feeds back carried out processing such as demultiplexing and audio/video decoding, and then generate original audio-video signal and export TV SKD to, to realize television receiver the reduction of ciphered program is play.
In addition, in order to keep the independence and the continuity of existing TV SKD, present embodiment preferably is arranged on above-mentioned terrestrial digital broadcasting signal receiving circuit on the independent circuit board, to form the digital decoding plate, by the interface module (such as socket and plug etc.) that complements one another is installed respectively, realize the communication that is connected of digital decoding plate and TV SKD on digital decoding plate and TV SKD.
For versatility and the compatibility that improves TV SKD, make it select to connect communication according to the concrete type of television set with different TV signal dash receivers or digital decoding plate, present embodiment is by consider various types of TV signal dash receivers or digital decoding plate comprehensively, thereby carried out specifically defined to each function pin in the described interface module, make it not only include signal transmission pin according to the needs definition of communicating by letter of described digital decoding plate and TV SKD, also define the signal transmission pin that communicating by letter of with good grounds conventional television signal dash receiver and described TV SKD need define, thereby form the general-purpose interface form, make different TV signal dash receivers or digital decoding plate can mate identical TV SKD, with construction cycle and the design risk that reduces tv product.
Shown in the pin definitions of described general-purpose interface sees table.
Wherein, the digital decoding plate is introduced working power by power pin VCC.Pass through I
2C bus pin SCL2, SDA2 realize that the bus between the master chip on described digital decoding plate and the TV SKD is connected, with transfer instruction information.Introduce digital decoding deck by remote signal input pin IR and I/0 pin respectively from the remote control command of remote-control receiving circuit and the button triggering signal of key circuit.Audio-video signal for digital decoder output then exports TV SKD to by left and right sound channels audio signal output pin L-AF out, R-AF out and color difference signal output pin Y out, CB out, CR out, and then utilizes and realize displaying the play of received terrestrial digital broadcasting TV signal after functional circuits such as existing video scaling, audio frequency power amplifier are for further processing on the TV SKD.Can when connecting other TV signal dash receivers or digital decoding plate, TV SKD specifically select as required to use for all the other pins in the general-purpose interface.
Certainly; the above only is a kind of preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (10)
1, a kind of television receiver that receives received terrestrial digital broadcasting is characterized in that: comprise TV SKD and connected terrestrial digital broadcasting signal receiving circuit; In described terrestrial digital broadcasting signal receiving circuit, include
The numeral tuner receives the cable digital TV radiofrequency signal that TV station sends;
Channel demodulator receives the digital medium-frequency signal of digital tuner output, adopt the ground digital television signal demodulation scheme that meets GB that it is carried out channel demodulation after, generate TS code stream and output;
Digital decoder, the TS code stream of channel demodulator output carried out demultiplexing and audio/video decoding after, generate original audio-video signal and export TV SKD to.
2, television receiver according to claim 1, it is characterized in that: in described digital tuner, comprise tuner and analog to digital converter, described tuner receives the cable digital TV radiofrequency signal that TV station sends, be demodulated into analog if signal and transfer to analog to digital converter and carry out the conversion of analog signal to digital signal, and then by analog to digital converter output digital medium-frequency signal.
3, television receiver according to claim 1 is characterized in that: described digital decoder is by bus connecting channel demodulator, with transfer instruction information.
4, television receiver according to claim 3, it is characterized in that: in described television receiver, include Conditional Access Module, connect described digital decoder, after enciphered message in the TS code stream that digital decoder is received is decrypted processing, feed back to that digital demodulator carries out demultiplexing and audio/video decoding is handled.
5, according to each described television receiver in the claim 1 to 4, it is characterized in that: described digital decoder connects the remote-control receiving circuit and the key circuit of television receiver inside, the button triggering signal of remote control command that the reception remote-control receiving circuit sends and key circuit output.
6, television receiver according to claim 5 is characterized in that: described digital decoder is by the master chip on the bus connection TV SKD, transfer instruction information.
7, television receiver according to claim 6 is characterized in that: also include flash memory and dynamic random access memory in described terrestrial digital broadcasting signal receiving circuit, be connected with described digital decoder respectively.
8, television receiver according to claim 7 is characterized in that: described digital decoder is high definition and SD digital television signal decoding chip, and output left and right acoustic channels digital audio and video signals and YCbCr color difference signal are to TV SKD.
9, television receiver according to claim 8 is characterized in that: described terrestrial digital broadcasting signal receiving circuit independently is arranged on the circuit board, forms the digital decoding plate; On described digital decoding plate and TV SKD, the general-purpose interface that can peg graft mutually is installed.
10, television receiver according to claim 9 is characterized in that: include in described general-purpose interface according to the signal transmission pin of the needs definition of communicating by letter of described digital decoding plate and TV SKD and according to the signal transmission pin of the needs definition of communicating by letter of conventional television signal dash receiver and described TV SKD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201597265U CN201134859Y (en) | 2007-12-25 | 2007-12-25 | Television receiver capable of receiving terrestrial digital broadcast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201597265U CN201134859Y (en) | 2007-12-25 | 2007-12-25 | Television receiver capable of receiving terrestrial digital broadcast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201134859Y true CN201134859Y (en) | 2008-10-15 |
Family
ID=40063130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201597265U Expired - Fee Related CN201134859Y (en) | 2007-12-25 | 2007-12-25 | Television receiver capable of receiving terrestrial digital broadcast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201134859Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108401181A (en) * | 2018-01-31 | 2018-08-14 | 深圳市华曦达科技股份有限公司 | A kind of set-top-box system and its data processing method based on USB network card technology |
-
2007
- 2007-12-25 CN CNU2007201597265U patent/CN201134859Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108401181A (en) * | 2018-01-31 | 2018-08-14 | 深圳市华曦达科技股份有限公司 | A kind of set-top-box system and its data processing method based on USB network card technology |
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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: 20081015 Termination date: 20111225 |