CN201550188U - High definition digital set top box with HDMI interface - Google Patents
High definition digital set top box with HDMI interface Download PDFInfo
- Publication number
- CN201550188U CN201550188U CN2009201831384U CN200920183138U CN201550188U CN 201550188 U CN201550188 U CN 201550188U CN 2009201831384 U CN2009201831384 U CN 2009201831384U CN 200920183138 U CN200920183138 U CN 200920183138U CN 201550188 U CN201550188 U CN 201550188U
- Authority
- CN
- China
- Prior art keywords
- interface
- resistance
- hdmi interface
- top box
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to a high definition digital set top box with HDMI interface, which comprises a set top box body, a circuit board arranged in the box body and an interface arranged at the outer side of the box body; output interfaces at the display part of the interface comprise an RCA interface, an S terminal, a VGA interface, and an HDMI interface; the interface circuit of the HDMI interface comprises an anti-static protective chip CM 2020 and an HDMI interface connector, the anti-static protective chip CM 2020 is connected between the CPU on the circuit board and the HDMI interface connector. The high definition digital set top box has the advantages of providing good high definition and ensuring an image signal to be output in a high-fidelity way; one cable connection can realize synchronous transmission of digital audio and a video signal, so as to effectively reduce the using cost and complex degree; hot plug is supported, so as to be widely applied to large screen projection display, computer liquid crystal display, multi-media meeting rooms and wine shops and other occasions.
Description
[technical field]
The utility model relates to digital television devices, particularly is provided with the high-definition digital set-top box of HDMI interface.
[background technology]
In recent years,, make vast TV user produce keen interest, and the video that will reach some definition just need to be equipped with corresponding interface and could bring into play its image quality fully to HD video along with the continuous lifting of video definition.Digital interface as latest generation, HDMI is extensively applied on the various digital products, no matter be panel TV, DVD disc player, high definition player, or projecting apparatus, Digital Video, LCD, and blue-ray DVD and HD DVD, all can't do without the figure of HDMI digital signal interface.The English full name of HDMI is High Definition Multimedia Interface, and Chinese is the abbreviation of HDMI (High Definition Multimedia Interface), can transmit the HD video and the multichannel audio data of uncompressed high-qualityly, and the maximum data transmission speed is 5Gbps.Need not simultaneously to transmit advance capable D/A or mould/number conversion, can guarantee that the video-audio signal of first water transmits at signal.HDMI not only can satisfy the resolution of at present high image quality 1080P, can also support state-of-the-art digital audio formats such as DVD Audio, support Eight-channel 96kHz or stereo 192kHz digital audio to transmit, and only connect, exempt the digital audio wiring with a HDMI line.The interface of HDMI specification can transmit the high-resolution video of uncompressed and the data of multichannel audio with the form of number under the high-quality situation of maintenance.Its excellent performance has surmounted all in the past products.
Universal use at present top box of digital machine, for adapting to this digitized trend, the totally digitilized interface that meets this high transmission speed, now connect high definition set-top box and HDTV with HDMI, just can high-qualityly watch the HDTV (High-Definition Television) program, realize the perfect dual impression of the vision and the sense of hearing! Can also be by this high definition set-top box that is provided with the HDMI interface in the computer LCD, projecting apparatus is watched the digital TV in high resolution program of country on the equipment such as multimedia.
Existing plain edition set-top box has only been considered S-Video, RCA, and general-purpose interfaces such as aberration terminal and VGA can't satisfy the demand of present consumer to the pursuing high quality life.Vast TV user is being furnished with the television set of a HDMI input port originally, and when be connected with set-top box owing to there not being corresponding output interface device, cause the user can't enjoy many advantages that HDMI brings.
[utility model content]
Technical problem to be solved in the utility model is to provide the high-definition digital that has a kind of HDMI of being provided with interface set-top box, thereby the demand that adapts to present TV industry development trend, in conjunction with television set, make the user can enjoy the picture of high definition more and the sound effect of high-fidelity more with HDMI input port.
The utility model solves the problems of the technologies described above by the following technical programs: a kind of high-definition digital set-top box that is provided with the HDMI interface, comprise set-top box box body, device circuit board and the interface of device outside box body in box body, the display part output interface of described interface comprises RCA interface, S terminal, VGA interface, it is characterized in that: the display part output interface of described set top box interface also comprises the HDMI interface.
The interface circuit of described HDMI interface comprises antistatic protection chip CM2020 and HDMI interface connector, and the input of described antistatic protection chip CM2020 is connected to the CPU on the circuit board, and output is connected to the HDMI interface connector.
The interface circuit of described HDMI interface also comprises resistance R D5, RD8, RD10, RD11; resistance R D5 is the resistance between the pin 16 of CPU and antistatic protection chip CM2020; resistance R D8 is the resistance between the pin 19 of CPU and antistatic protection chip CM2020; resistance R D10 is the resistance between the pin 17 of CPU and antistatic protection chip CM2020, and resistance R D11 is the resistance between the pin 18 of CPU and antistatic protection chip CM2020.
The interface circuit of described HDMI interface also comprises resistance R D2, RD1; the pin 22 of described antistatic protection chip CM2020 passes through the pin 15 that the pull-up resistor RD2 that receives the 5V power supply is connected to the HDMI interface connector, and the pin 21 of described antistatic protection chip CM2020 is connected to HDMI interface connector pin 16 through the pull-up resistor RD1 that receives the 5V power supply.
The interface circuit of described HDMI interface also comprises resistance R D2, diode DD1, resistance R D3; and capacitor C D3; the pin 37 of antistatic protection chip CM2020 is connected to the pin 23 of antistatic protection chip CM2020 successively through resistance R D2, diode DD1, resistance R D3; the pin 37 of antistatic protection chip CM2020 is by a capacitor C D3 ground connection; wherein resistance R D2 receives the anode of diode DD1, and resistance R D3 receives the negative electrode of diode DD1.
The advantage that the utility model is provided with the high-definition digital set-top box of HDMI interface is:
1, it is minimum under the signal mode of this equipment output signal attenuation to be reduced to, and provides good high definition and has guaranteed that picture signal can with high fidelity export.
2, this equipment can compatiblely be supported 480p, 720p, 1080i, 1080p and 1920x1200 resolution.
3, because this interface volume is little, the single line cable connects just can realize digital audio, and the vision signal synchronous transmission effectively reduces use cost and numerous and diverse degree.
4, support hot plug; Can extensively apply to occasions such as large screen projection demonstration, computer liquid crystal display, multimedia conferencing chamber, hotel.
[description of drawings]
The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the circuit diagram of the HDMI interface of the utility model high-definition digital set-top box of being provided with the HDMI interface.
[embodiment]
The high-definition digital set-top box that the utility model is provided with the HDMI interface comprises set-top box box body, device circuit board and the interface of device outside box body in box body, and the display part output interface of described interface comprises RCA interface, S terminal, VGA interface.Its characteristics that are different from existing set-top box are: the display part output interface of described set top box interface also comprises the HDMI interface.
See also Fig. 1; the interface circuit of described HDMI interface comprises antistatic protection chip CM2020 and HDMI interface connector; it is ESD (the Electro-Static discharge between CPU on the circuit board and HDMI interface connector that described antistatic protection chip CM2020 is one; static discharge) device; the input of antistatic protection chip CM2020 is connected to CPU; output is connected to the HDMI interface connector; antistatic protection chip CM2020 also plays level conversion in circuit; overcurrent output protection and back flow protection effect, the integrality of transmission data during protection HDMI interface connector is communicated by letter with CPU.
Audio-video signal via CPU output is divided into TX2P, TX2N, TX1P, TX1N, TX0P, TX0N and TXCKP, four groups of data of TXCKN are exported corresponding loss-free complete audio-video signal to interface connector via the esd protection function of CM2020.
Resistance R D5 is the resistance between the pin 16 of CPU and antistatic protection chip CM2020; resistance R D8 is the resistance between the pin 19 of CPU and antistatic protection chip CM2020; resistance R D10 is the resistance between the pin 17 of CPU and antistatic protection chip CM2020; resistance R D11 is the resistance between the pin 18 of CPU and antistatic protection chip CM2020, and resistance R D5, resistance R D8, resistance R D17, resistance R D18 provide the pull-up resistor of 3.3V for the I2C signal between CPU and the antistatic protection chip CM2020.
After the level conversion through antistatic protection chip CM2020; the pin 22 of antistatic protection chip CM2020 and the I2C signal of pin 21 provide the I2C that is complementary voltage for the HDMI interface connector through pull-up resistor RD2, the RD1 that receives the 5V power supply respectively again, and the pin 22 of antistatic protection chip CM2020 and pin 21 are connected respectively to the pin 15 and the pin 16 of HDMI interface connector.
The pin 37 of antistatic protection chip CM2020 is connected to the pin 23 of antistatic protection chip CM2020 successively through resistance R D2, diode DD1, resistance R D3; simultaneously; the pin 37 of antistatic protection chip CM2020 is by a capacitor C D3 ground connection; resistance R D2, diode DD1, resistance R D3; and the network formed of capacitor C D3 plays overcurrent output protection and the back flow protection of 55mA, makes the HDMI interface also can realize plug-and-play feature on set-top box.
Claims (5)
1. high-definition digital set-top box that is provided with the HDMI interface, comprise set-top box box body, device circuit board and the interface of device outside box body in box body, the display part output interface of described interface comprises RCA interface, S terminal, VGA interface, it is characterized in that: the display part output interface of described set top box interface also comprises the HDMI interface.
2. the high-definition digital set-top box that is provided with the HDMI interface as claimed in claim 1; it is characterized in that: the interface circuit of described HDMI interface comprises antistatic protection chip CM2020 and HDMI interface connector; the input of described antistatic protection chip CM2020 is connected to the CPU on the circuit board, and output is connected to the HDMI interface connector.
3. the high-definition digital set-top box that is provided with the HDMI interface as claimed in claim 2; it is characterized in that: the interface circuit of described HDMI interface also comprises resistance R D5, RD8, RD10, RD11; resistance R D5 is the resistance between the pin 16 of CPU and antistatic protection chip CM2020; resistance R D8 is the resistance between the pin 19 of CPU and antistatic protection chip CM2020; resistance R D10 is the resistance between the pin 17 of CPU and antistatic protection chip CM2020, and resistance R D11 is the resistance between the pin 18 of CPU and antistatic protection chip CM2020.
4. the high-definition digital set-top box that is provided with the HDMI interface as claimed in claim 2; it is characterized in that: the interface circuit of described HDMI interface also comprises resistance R D2, RD1; the pin 22 of described antistatic protection chip CM2020 passes through the pin 15 that the pull-up resistor RD2 that receives the 5V power supply is connected to the HDMI interface connector, and the pin 21 of described antistatic protection chip CM2020 is connected to HDMI interface connector pin 16 through the pull-up resistor RD1 that receives the 5V power supply.
5. the high-definition digital set-top box that is provided with the HDMI interface as claimed in claim 2; it is characterized in that: the interface circuit of described HDMI interface also comprises resistance R D2, diode DD1, resistance R D3; and capacitor C D3; the pin 37 of antistatic protection chip CM2020 is connected to the pin 23 of antistatic protection chip CM2020 successively through resistance R D2, diode DD1, resistance R D3; the pin 37 of antistatic protection chip CM2020 is by a capacitor C D3 ground connection; wherein resistance R D2 receives the anode of diode DD1, and resistance R D3 receives the negative electrode of diode DD1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201831384U CN201550188U (en) | 2009-09-29 | 2009-09-29 | High definition digital set top box with HDMI interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201831384U CN201550188U (en) | 2009-09-29 | 2009-09-29 | High definition digital set top box with HDMI interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201550188U true CN201550188U (en) | 2010-08-11 |
Family
ID=42605371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201831384U Expired - Fee Related CN201550188U (en) | 2009-09-29 | 2009-09-29 | High definition digital set top box with HDMI interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201550188U (en) |
-
2009
- 2009-09-29 CN CN2009201831384U patent/CN201550188U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2439924B1 (en) | Extension module and television having the extension module | |
| CA2748888C (en) | Tv function expansion component using gold finger connector | |
| WO2010075686A1 (en) | Television capable of implementing function extension | |
| CN101727873A (en) | Signal conversion apparatuses and display system | |
| US20110321116A1 (en) | Tv signal switching box and controlling method thereof | |
| TWM465740U (en) | Split television and host thereof | |
| US20080018653A1 (en) | Graphic card | |
| CN102497515A (en) | SIMO (single-input multiple-output) type HDMI (high-definition multimedia interface) distributor device | |
| CN101686359B (en) | HDMI distributor | |
| TWI403089B (en) | Dongle | |
| CN201550188U (en) | High definition digital set top box with HDMI interface | |
| CN101282413A (en) | HDMI serial port communication circuit | |
| CN205693773U (en) | Four enter two goes out HDMI signal picture-in-picture switching allotter | |
| CN202231794U (en) | HDMI converter | |
| CN2924968Y (en) | High definition media player | |
| CN202424900U (en) | Universal high-definition-to-standard-definition converter | |
| CN207573452U (en) | A kind of integrated terminal equipment made for internet audiovisual with activity live streaming | |
| CN204681491U (en) | Multi-format video and audio converter | |
| CN201557195U (en) | High-definition player | |
| CN201608797U (en) | Television set | |
| CN205005168U (en) | HDMI connecting wire with operating condition shows | |
| CN205847319U (en) | Multi-media transmission system | |
| CN202395842U (en) | Wireless fixed telephone with HDMI interface function | |
| CN201328160Y (en) | Data channel circuit of HDMI display | |
| CN103220487A (en) | Universal converter capable of converting high definition into standard definition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Mawei Development Zone, Fujian province Fuzhou Ru Jiang Road 350000, No. 70 (Scud Industrial Park) 6 floor and 5 floor two to four Patentee after: Fujian Newland Communication Science Technology Co., Ltd. Address before: 350000 Fuzhou Province, Mawei District, west of the Confucian Road, No. 1 Patentee before: Fujian Newland Communication Science & Technology Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100811 Termination date: 20130929 |