CN201813462U - Information source conversion control device of demonstration terminal - Google Patents
Information source conversion control device of demonstration terminal Download PDFInfo
- Publication number
- CN201813462U CN201813462U CN2010202440836U CN201020244083U CN201813462U CN 201813462 U CN201813462 U CN 201813462U CN 2010202440836 U CN2010202440836 U CN 2010202440836U CN 201020244083 U CN201020244083 U CN 201020244083U CN 201813462 U CN201813462 U CN 201813462U
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- control device
- modulator
- conversion control
- information source
- video decoding
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Abstract
The utility model discloses an information source conversion control device of a demonstration terminal, which comprises a plurality of independent video decoding chips that are connected with the corresponding modulators and output ports through data lines. Each video decoding chip is connected with a memory card and a miniUSB interface. The video decoding chip reads the AV (audio/video) file in the memory card or the AV file in a mobile memory connected with the miniUSB interface, and the AV file taken as input signal source signals is processed by the corresponding modulator and output after being converted into analog cable television broadcasting signals of a plurality of channels. The information source conversion control device greatly facilitates the use of products with television signal receiving function without the need of being connected with real cable television signal wires.
Description
Technical field
The utility model relates to a kind of electronic digital display unit, especially about a kind of information source conversion control device of presentation terminal.
Background technology
Existing electronics shows that product is a lot, but electronics shows that product has different interfaces and decoding circuit, unlike signal to input can not be compatible, so need the information source conversion control device of a presentation terminal, the analog catv broadcast singal that can convert the audio frequency and video or the picture file of different-format to different channel, convenient results of broadcast of showing different demonstration products simultaneously.
The utility model content
The utility model provides the information source conversion control device of presentation terminal, the audio frequency and video or the picture file of input can be handled respectively, converts the analog catv broadcast singal of different channel to, and the product that conveniently has the TV signal receiving function uses.
The utility model provides a kind of information source conversion control device of presentation terminal, comprise a plurality of independently video decoding chips, connect corresponding modulators and output port by data wire respectively, a plurality of described video decoding chips all also are connected with RAM (random access memory) card and miniUSB interface; A plurality of described video decoding chips by read in the RAM (random access memory) card separately or mobile memory that the miniUSB interface connects in audio-video document (comprising picture file), described audio-video document is handled through corresponding described modulator as the source signal of input, converted to the analog catv broadcast singal output of a plurality of different channels.
That is to say, audio-video document in the mobile memory that described RAM (random access memory) card or miniUSB interface connect is as the source signal of input, by described video decoding chip and modulator alignment processing, described source signal is converted to the analog catv broadcast singal output of different channel.
Further, three described video decoding chips are respectively three DPF chip A, B, C, and wherein said DPF chip A, B also are provided with the SD deck interface of the SD card of can pegging graft.
Further, corresponding respectively three DPF chip A, B, the C of connecting of three modulator A, B, C, the output of three described modulator A, B, C also all is connected with the female stand of IEC.
Further, the road output of described modulator A connects described modulator B by frequency mixer, the road output of described modulator B connects described modulator C by frequency mixer, described modulator C is divided into the analog catv signal of three channels by two one-to-two signal distributors with three road analog catv signals, and passes through three IEC female stands outputs.
Concrete, the audio-video signal that described each modulator is all come in input, export the analog catv signal of not going the same way respectively by the control of external control chip, and three road cable TV signals are handled by mixing and two one-to-two signal distributors, tell the analog catv signal output of three channels.
Employing has following advantage with the information source conversion control device of the presentation terminal that the utility model provides:
Can in the RAM (random access memory) card N_flash that a plurality of independently video decoding chips respectively carry, read video file or read audio-video document the mobile memory by the miniUSB interface, wherein the video decoding chip of two band SD deck interfaces can also read the content of SD card the inside by SD deck interface, by a plurality of demodulator processes independently, the analog catv broadcast singal that converts the audio frequency and video or the picture file of different-format to different channel, convenient results of broadcast of showing different demonstration products simultaneously, and needn't connect real cable TV signal line.
Description of drawings
Fig. 1 is the information source conversion control device block diagram of the presentation terminal that provides of the utility model embodiment one.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, the utility model is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, the utility model embodiment one provides a kind of information source conversion control device of presentation terminal, comprise three independently video decoding chip A, B, C, by means of power, connect three modulator A, B, C and output ports by data wire respectively, three described video decoding chips all also are connected with RAM (random access memory) card N_flash and miniUSB interface; Three described video decoding chips by read in the RAM (random access memory) card separately or mobile memory that the miniUSB interface connects in audio-video document, handle through corresponding described modulator, convert the analog catv broadcast singal output of three different channels to.Need to prove that the number of described video decoding chip can be 2 or 4 etc., they can connect the modulator of respective amount, and are identical in its operation principle and circuit connecting relation and the present embodiment one, no longer repeat here.
Concrete, described information source conversion control device can be a PCB circuit board, is example with 3 described video decoding chips.There are three video decoding chip A, B, C that work alone described PCB circuit board the inside, and each all has miniUSB interface and RAM (random access memory) card N_flash, and two chips are wherein arranged, and promptly described DPF chip A, B also are provided with the SD deck interface of the SD card of can pegging graft.Each video decoding chip can read the video file that it has in it controls oneself the RAM (random access memory) card N_flash that has like this, or by miniUSB interface connection mobile memory, read wherein audio-video document and picture file, the video decoding chips of two band SD deck interfaces wherein, promptly described DPF chip A, B can also read the content of SD card the inside by SD deck interface.
Three video decoding chip A for example, B, C by read in the RAM (random access memory) card separately or mobile memory that the miniUSB interface connects in audio-video document, or be inserted in audio frequency and video or the picture file that stores in the SD card of SD deck, output audio-video signal separately, looking signal because of this three road sound is by three video decoding chip A, B, file in C and the storage medium separately gets, so produce three tunnel different signal sources, this three road audio-video signal is sent corresponding three modulators that connect respectively to, each modulator all is modulated into the analog catv signal to the audio-video signal of coming in, control by external control chip to modulator, three analog catv signals that come out by modulator are modulated into three different channel analog catv signals, such three analog catv signals are blended in same channel transfer by mixing, and three different channel signals are just arranged on same passage this moment.
The road output of described modulator A connects described modulator B by frequency mixer, the road output of described modulator B connects described modulator C by frequency mixer, described modulator C is divided into the analog catv signal of three channels by two one-to-two signal distributors with three road analog catv signals, and passes through three IEC female stands outputs.
Output at described DPF chip C, wired anolog TV signals of three channels are told three tunnel analog catv signals that all have three channels by two one-to-two signal distributors, each road connects an IEC female stand respectively, and such three IEC females all have the analog catv signal sacrificial vessel of three channels to have the product of anolog TV signals receiving function to use.
Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle, can also make some improvement and change, these improvement and change also are considered as protection range of the present utility model.
Claims (4)
1. the information source conversion control device of a presentation terminal, it is characterized in that, comprise a plurality of independently video decoding chips, connect corresponding modulators and output port by data wire respectively, a plurality of described video decoding chips all also are connected with RAM (random access memory) card and miniUSB interface; A plurality of described video decoding chips by read in the RAM (random access memory) card separately or mobile memory that the miniUSB interface connects in audio-video document, described audio-video document is handled through corresponding described modulator as the source signal of input, converted to the analog catv broadcast singal output of a plurality of different channels.
2. according to the information source conversion control device of the described presentation terminal of claim 1, it is characterized in that, three described video decoding chips are respectively three DPF chip A, B, C, and wherein said DPF chip A, B also are provided with the SD deck interface of the SD card of can pegging graft.
3. according to the information source conversion control device of the described presentation terminal of claim 2, it is characterized in that, corresponding respectively three DPF chip A, B, the C of connecting of three modulator A, B, C, the output of three described modulator A, B, C also all is connected with IEC female stand.
4. according to the information source conversion control device of the described presentation terminal of claim 3, it is characterized in that, the road output of described modulator A connects described modulator B by frequency mixer, the road output of described modulator B connects described modulator C by frequency mixer, described modulator C is divided into the analog catv signal of three different channels by two one-to-two signal distributors with three road analog catv signals, and passes through three IEC female stands outputs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202440836U CN201813462U (en) | 2010-06-30 | 2010-06-30 | Information source conversion control device of demonstration terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202440836U CN201813462U (en) | 2010-06-30 | 2010-06-30 | Information source conversion control device of demonstration terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201813462U true CN201813462U (en) | 2011-04-27 |
Family
ID=43896397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202440836U Expired - Fee Related CN201813462U (en) | 2010-06-30 | 2010-06-30 | Information source conversion control device of demonstration terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201813462U (en) |
-
2010
- 2010-06-30 CN CN2010202440836U patent/CN201813462U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20170630 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |