CN201210710Y - Front-end plate interface of set-top box - Google Patents
Front-end plate interface of set-top box Download PDFInfo
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- CN201210710Y CN201210710Y CNU2008200245812U CN200820024581U CN201210710Y CN 201210710 Y CN201210710 Y CN 201210710Y CN U2008200245812 U CNU2008200245812 U CN U2008200245812U CN 200820024581 U CN200820024581 U CN 200820024581U CN 201210710 Y CN201210710 Y CN 201210710Y
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- top box
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Abstract
The utility model discloses a set-top box front end plate interface; the front end plate communicates with the main plate in the set-top box through the interface; the front end plate interface comprises a transmission data signal, a bus signal, a control signal and a functional pin of a power, further comprising a transmission reset signal and a functional pin of a clock signal; the pins are respectively connected with corresponding functional circuits in the front end plate and the main plate. By the front end plate interface, the utility model is capable of realizing the convenient combination of various modulating and decoding proposals, ensuring the reliable communication between the modulating and decoding, ensuring the reliability of the set-top box work, and greatly shortening the time of developing the set-top box proposal design.
Description
Technical field
The utility model relates to a kind of communication interface, specifically, relates to the front end-plate interface of the set-top box mainboard of the adaptive various designs of a kind of energy.
Background technology
Set-top box is made up of tuner, channel demodulator, information source demodulation multiplexer, MPEG-2 decoder, video encoder, audio frequency D/A, embedded type CPU system and peripheral interface, Conditional Access Module etc.Tuner receives the high-frequency signal from wired network, finishes channel-decoding by demodulator, isolates the transmission stream that comprises sound, video and other data message from carrier wave.Transmit in the stream and generally comprise a plurality of sounds, video flowing and some data messages.Demodulation multiplexer then is used for distinguishing different programs, extracts corresponding sound, video flowing and data flow, sends into MPEG-2 decoder and the corresponding software of resolving, and finishes the reduction of digital information.The MPEG-2 decoder is finished the decompression of sound, vision signal, through video encoder and audio frequency D/A conversion, restores simulation sound, vision signal, shows high quality graphic on conventional color television set, and the multichannel sterego program is provided.
In the prior art, demodulator in the set-top box and decoder design are usually realized on a circuit main board.The defective that this integrated design brings is, change any part in demodulator or the decoder if desired, the monoblock circuit main board all will be changed design again, not only expend time in and various human resources, improve the cost of set-top box complete machine, and do not met the development trend of integrated circuit versatility.
For solving the problems of the technologies described above, based on minute plate thought, the design of demodulator and decoder branch can being come be about to the design of set-top box demodulation part and tuner on the set-top box front end-plate, and decoded portion designs on mainboard still.Utilize plate design in this minute, when needs change decoding scheme, demodulation does not partly need change, can significantly shorten the cycle of designing and developing, and reduces and designs and develops cost.With demodulator and decoder separately after the design, and when decoding scheme changes, for being in harmonious proportion, the proper solution that realizes digital television signal decodes, must guarantee the proper communication between demodulator and the decoder, also promptly will guarantee the proper communication between set-top box front end-plate and the mainboard, this also is a technical problem underlying to be solved in the utility model.
The utility model content
The utility model is in order to solve in the prior art set-top box demodulator and decoder design on a circuit main board, cause set-top box Renewal Design complexity, the relatively poor defective of versatility, a kind of set-top box front end-plate interface is provided, demodulator on the front end-plate and the decoder on the mainboard can carry out proper communication by described interface, after decoding scheme or demodulation scheme change, do not need to change the design of demodulation or decoding, improved the versatility of set-top box scenario design.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of set-top box front end-plate interface, described front end-plate communicates by the mainboard in described interface and the set-top box; Described front end-plate interface includes the function pin of transmission of data signals, bus signals, control signal and power supply, also includes the function pin of transmission reset signal and clock signal; Described pin respectively with the corresponding connection of corresponding function circuit in front end-plate and the mainboard.
Further, the function pin of described transmission of data signals comprises data input pin and data output pin.Wherein, described data input pin is the pin of a reception from set-top box tuner digital television signal; And described data output function pin is 8 parallel-by-bit transfer of data pins of 8 pins.
Again further, the function pin of described transfer bus signal comprises bus clock pin and bus data pin.
Preferably, described bus is I
2The C bus.
For realizing the reliable communication between front end-plate and the mainboard, the function pin that also comprises several transmission of control signals in the described interface, these function pins comprise a data invalid signals pin, a synchronizing signal pin, a data rub-out signal pin, a polarization mode is selected signal pin and an Opportunity awaiting control for linear signal pin.
Further, the function pin of described transmission power supply is at least two, and one is the pin of transmission 3.3V power supply, and another is the pin of transmission 5V power supply.
For satisfying the power supply requirement of part tuner, the function pin of described transmission power supply also comprises the pin of a transmission 22V power supply.
Again further, described front end-plate interface also comprises several ground pin, to reduce the phase mutual interference between the signal.
Compared with prior art, advantage of the present utility model and good effect are: with the set-top box demodulator design on front end-plate, decoder design is on mainboard, the set-top box front end-plate interface that utilizes the utility model to provide, can realize the convenient combination of various demodulation, decoding scheme, guarantee the reliable communication between the demodulation sign indicating number, guarantee the reliability of set-top box work, simultaneously, shortened the time that set-top box scenario is designed and developed significantly.
Description of drawings
Fig. 1 is the design layout of the utility model set-top box front end-plate interface on front end-plate;
Fig. 2 is the pin layout of interface shown in Figure 1.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
Figure 1 shows that the set-top box front end-plate design layout that has the front end-plate interface.In order to improve the versatility of set-top box circuit design, shorten the construction cycle of demodulation and decoding scheme design, demodulator and tuner are together designed on the set-top box front end-plate, and decoder still designs on the set-top box mainboard.For demodulation and the convenient of decoding of realizing the different designs scheme makes up, on front end-plate, designed a front end-plate interface, as shown in fig. 1.The pin layout of this interface as shown in Figure 2, interface adopts the layout designs of double 40 pins, can adopt socket or contact pin arranged in form on front end-plate.Its each function pin respectively with the corresponding connection of corresponding function circuit in front end-plate and the mainboard.Each pin is defined as follows shown in the table 1:
Table 1
Can clearly be seen that from above-mentioned table 1, described front end-plate interface definition the function pin of transmission of data signals, bus signals, control signal and power supply, and the function pin of transmission reset signal and clock signal.Details are as follows for the definition of each pin and function:
The function pin of transmission of data signals comprises the data input pin of a reception from the digital television signal of set-top box tuner, i.e. the LNB_S pin of P40.The high-frequency signal that tuner will be received from wired network is input to the demodulation of carrying out signal in the demodulator of front end-plate by P40.Described interface has also defined the data output pin of output stream, promptly goes up the D0～D7 in the table.Mpeg data stream after the demodulator demodulation carries out signal decoding with transfer of data by this parallel data output pin of 8 to the mainboard decoder.
In order to guarantee the reliable communication between front end-plate and the mainboard, realize the reliable transmission of data-signal between demodulator and decoder, described interface has also defined the function pin of several transmission of control signals, is respectively the VALID pin of P25 transmission mpeg data wireless signal, the SYNC pin of P27 transmission MPEG synchronizing signal, the ERROR pin of P29 transmission mpeg data rub-out signal, the SLEEP pin of P31 transmission Opportunity awaiting control for linear signal and the C_H/V pin that P39 transmission LNB polarization mode is selected signal.Function pin by above-mentioned each transmission of control signals, not only can monitor the state of mpeg data transmission automatically, can also realize the selection of tuner LNB polarization mode and the control of set-top box standby operating state, guarantee normal, the steady operation of each functional module of set-top box.In addition, above-mentioned front end-plate interface has also defined the reseting pin of a MPEG clock output pin and demodulation chip, i.e. the RESET pin of the CLK pin of P23 and P37.
Above-mentioned interface has also defined between front end-plate and the mainboard and has passed through I
2The C bus is carried out the bus pin of transfer of data, comprises the bus clock pin SCL of P33 and the bus data pin SDA of P35.
For satisfying the power supply requirement of each functional module of front end-plate, and consider the different needs of different tuner LNB to power supply, above-mentioned front end-plate interface definition three power pin, be respectively the 5V power pin of P1, the 3.3V power pin of P2 and the 22V power pin of P3.Simultaneously, in order to reduce the phase mutual interference between the signal, above-mentioned interface 19 ground pin of having arranged promptly go up the GND pin in the table.
Front end-plate interface described in the utility model can satisfy the demand of satellite, wired and ground digital set-top box, makes various demodulation in the set-top box, decoding scheme to make up easily, has shortened the conceptual design construction cycle.The front end-plate interface has constituted the general workbench of set-top box by matching with the decoding mainboard, has improved the versatility of set-top box integrated circuit (IC) design, has improved the complete machine performance of set-top box.
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 set-top box front end-plate interface, described front end-plate communicates by the mainboard in described interface and the set-top box, it is characterized in that, described front end-plate interface includes the function pin of transmission of data signals, bus signals, control signal and power supply, also includes the function pin of transmission reset signal and clock signal; Described pin respectively with the corresponding connection of corresponding function circuit in front end-plate and the mainboard.
2, set-top box front end-plate interface according to claim 1 is characterized in that, the function pin of described transmission of data signals comprises data input function pin and data output function pin.
3, set-top box front end-plate interface according to claim 2 is characterized in that, described data input function pin is the pin of a reception from set-top box tuner digital television signal.
4, set-top box front end-plate interface according to claim 2 is characterized in that, described data output function pin is 8 parallel-by-bit transfer of data pins of 8 pins.
5, set-top box front end-plate interface according to claim 1 is characterized in that, the function pin of described transfer bus signal comprises bus clock pin and bus data pin.
6, set-top box front end-plate interface according to claim 5 is characterized in that, described bus is I
2The C bus.
7, set-top box front end-plate interface according to claim 1, it is characterized in that, the function pin of described transmission of control signals comprises a data invalid signals pin, a synchronizing signal pin, a data rub-out signal pin, a polarization mode is selected signal pin and an Opportunity awaiting control for linear signal pin.
8, set-top box front end-plate interface according to claim 1 is characterized in that, the function pin of described transmission power supply is at least two, and one is the pin of transmission 3.3V power supply, and another is the pin of transmission 5V power supply.
9, set-top box front end-plate interface according to claim 8 is characterized in that, the function pin of described transmission power supply also comprises the pin of a transmission 22V power supply.
10, according to each described set-top box front end-plate interface in the claim 1 to 9, it is characterized in that described front end-plate interface also comprises several ground pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200245812U CN201210710Y (en) | 2008-06-23 | 2008-06-23 | Front-end plate interface of set-top box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200245812U CN201210710Y (en) | 2008-06-23 | 2008-06-23 | Front-end plate interface of set-top box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201210710Y true CN201210710Y (en) | 2009-03-18 |
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ID=40481445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200245812U Expired - Lifetime CN201210710Y (en) | 2008-06-23 | 2008-06-23 | Front-end plate interface of set-top box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201210710Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109531569A (en) * | 2018-12-05 | 2019-03-29 | 张洋 | Support the interface of different soft copy interconnection and the robot based on the interface |
-
2008
- 2008-06-23 CN CNU2008200245812U patent/CN201210710Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109531569A (en) * | 2018-12-05 | 2019-03-29 | 张洋 | Support the interface of different soft copy interconnection and the robot based on the interface |
| CN109531569B (en) * | 2018-12-05 | 2021-08-31 | 北京爱其科技有限公司 | Robot based on interface supporting interconnection of different electronic parts |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090318 |