CN2852558Y - Digital television set-top box based on cable television network - Google Patents
Digital television set-top box based on cable television network Download PDFInfo
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- CN2852558Y CN2852558Y CNU2005200797392U CN200520079739U CN2852558Y CN 2852558 Y CN2852558 Y CN 2852558Y CN U2005200797392 U CNU2005200797392 U CN U2005200797392U CN 200520079739 U CN200520079739 U CN 200520079739U CN 2852558 Y CN2852558 Y CN 2852558Y
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Abstract
The utility model discloses a digital television set-top box based on a cable television network. The utility model comprises a digital high frequency head and a main control board, wherein the master control board is connected with the digital high frequency head through a digital interface; the master control board comprises a main chip and a memory, wherein the memory is connected with the main chip through a control bus and a data bus, the main chip is embedded with an MIPS de-multiplexing processor, an MPEG-2 audio-video decoding processor, a video encoder, a graphic processor and an audio D/A converter, wherein the output end of the video encoder is connected with a video frequency output port, and the output end of the audio D/A converter is connected with an audio output port; besides, the main control board is connected with an SMART clamping board through the data interface. The utility model greatly enhances carrier frequency deviation indexes and effectively lowers the minimum receiving electric level; besides, the utility model not only enhances watching effect and completes the function of a high-quality watching interface but also adds the functions of hard disk recording and playing and high-speed USB interface data transmission, and the program optimization and the upgrade of a user set-top box are facilitated.
Description
Technical field
The utility model relates to the digital TV set-top box field, particularly a kind of digital TV set-top box based on cable TV network.
Background technology
China is television set production and consumption big country, and the recoverable amount of domestic television machine surpasses 400,000,000 at present, and the supporting industry that colour TV is relevant with it is the important force of our national information industry fast development of pulling.And the cause analogue technique does not promote the upgrading of technology to digital technology transition stably by Digital Television, is to have very important significance to the whole world or to the popularizing all of Digital Television of our country.According to " the radio, film and television science and technology the Tenth Five-Year Plan (2001-2005) and the long-range objectives to the year 2010 ", to the end of the year 2005, China cable digital TV user will reach 3,000 ten thousand families, but in fact, present domestic digital cable customers is more than 100 ten thousand families only, under this background, SARFT(The State Administration of Radio and Television) desires to quicken to popularize with market-oriented means, thereby makes the paces of domestic Digital Television overall development suddenly quicken.For solving the problem that existing simulated television user can't watch Digital Television, the development of the Digital Television industry of China should be a cutting point with the cabled digital product, and digital TV set-top box is arisen at the historic moment.According to scholarly forecast, the industry size of domestic set-top box crosses hundred billion, and present set-top box mostly is satellite greatly or ground is the set-top box of transmitting carrier, even the function of the set-top box of cable TV network and pattern are all only finished basic receiving digital television function.
The utility model content
The purpose of this utility model is at above-mentioned the deficiencies in the prior art, and a kind of multi-functional digital TV set-top box based on cable TV network is provided.It has not only improved view reception effect, finish the high-quality interface function of watching, hard disk recording playback and hi-speed USB interface data-transformation facility have been increased especially, it is finished the user by the built-in hard disk of hard-disk interface driving and likes recording of interface and access, the RS232 serial ports of its configuration is finished the data communication of set-top box and computer, conveniently the subscriber computer top box is carried out program optimization and upgrading.
For achieving the above object, the technical scheme that the utility model adopted is: a kind of digital TV set-top box based on cable TV network, comprise the digital tuner and the master control borad that by digital interface with digital tuner be connected of reception by CATV wire cable carry high frequency digital signal, it is characterized in that: described master control borad comprises master chip and passes through control bus, FLASH memory that data/address bus is connected with master chip and SDRAM memory, the embedded MIPS demultiplexing of master chip processor, MPEG-II audio/video decoding processor, video encoder, graphic process unit and audio digital to analog converter, the video encoder output is connected with video output, the audio digital to analog converter output is connected with audio output port, and master control borad links to each other with the SMART clamp by data-interface.
The utility model compared with prior art has the following advantages: 1, increased substantially the carrier wave frequency deviation index, effectively reduced minimum incoming level; 2, set top box interface further expands, and prolongs the serviceable bife as consumer electronics; 3, the long-range LOAD upgrade interface of set-top box allows program updates, for CHINA RFTCOM Co Ltd unified management various brands set-top box has been created condition, reduced the complexity of safeguarding of Digital Television total system; 4, this set-top box fully takes into account the importance as product for civilian use cost in design, and utilance by improving CPU in many ways in design work and the utilance of SDRAM, FLASH ensure that use value reduces cost simultaneously.
Description of drawings
Fig. 1 is the utility model digital TV set-top box composition frame chart.
Embodiment
Below in conjunction with accompanying drawing the utility model is elaborated.
As shown in Figure 1, the utility model comprises the digital tuner and the master control borad that by digital interface with digital tuner be connected of reception by CATV wire cable carry high frequency digital signal, described master control borad comprises the LSI2005F master chip and passes through control bus, FLASH memory that data/address bus is connected with the LSI2005F master chip and SDRAM memory, the embedded MIPS demultiplexing of LSI2005F master chip processor, MPEG-II audio/video decoding processor, video encoder, graphic process unit and audio digital to analog converter, the video encoder output is connected with video output, the audio digital to analog converter output is connected with audio output port, and master control borad links to each other with the SMART clamp by data-interface.
The detailed annexation of LSI2005F master chip and each several part is as follows:
The connection of LSI2005F master chip and digital tuner: by control bus SCL, SDA, TFRAME, TVALID and digital tuner is corresponding links to each other, digital tuner work at present state can correspondingly be controlled and read to master chip easily by control bus to digital tuner.By reset line RESETN digital tuner is resetted, provide clock signal to digital tuner, receive the digital signal of digital tuner by 8 single data bus TD0～TD8 by clock line TCLK.
The LSI2005F master chip is connected with the FLASH memory: master chip is sent chip selection signal by CS0 for the FLASH memory; Link to each other with the FLASH memory chip is corresponding by demultiplexing address bus ADDR0～ADDR8, by link to each other corresponding of control bus WRN, RDN finishing read-write control with FLASH; Link to each other with the address date line of FLASH memory respectively by address date multiplex bus AD0～AD31.Link to each other with the FLASH memory reset signal by reset line RESETN.Master chip and the control and the signal processing that have realized being connected of FLASH memory whole system.
The LSI2005F master chip is connected with the SDRAM memory: the embedded MPEG-II audio/video decoding of LSI2005F master chip processor, external SDRAM memory just can be realized the MPEG-II of system audio/video decoding processing capacity.Master chip links to each other with the control line of SDRAMA, SDRAMB respectively by control bus SABA, SADQM, SARD, SAWE and SBBA, SBDQM, SBRD, SBWE, SBBA0, SBBA1; Master chip links to each other with the address wire of SDRAMA, SDRAMB respectively by address bus SAA0～SAA11, SBA0～SBA11; Master chip links to each other with the data wire of SDRAMA, SDRAMB respectively by data/address bus SAD0～SAD15, SBD0～SBD15; Provide clock signal to SDRAMA, SDRAMB respectively by clock line SACLK, SBCLK.
The LSI2005F master chip is connected with audio output port: master chip is handled audio signal AUDLE1, AUDLE2, AUDRIG1, the AUDRIG2 of output left and right acoustic channels by inner audio frequency DAC, through after the peripheral discrete component processing and amplifying, by audio output port output simulated audio signal.
The LSI2005F master chip is connected with video output: the video encoder of master chip inside and graphic process unit are finished the coding of stack of 2D figure and vision signal, after CVBS, Y, the peripheral discrete component processing of C video line process, by video output output analog video signal.
The LSI2005F master chip is connected with the IDE hard-disk interface: master chip is sent chip selection signal by ATACSN0 for the IDE hard-disk interface; By control bus ATA_DMARQ, ATA_DIOWN, ATA_DIORN, ATA_IORDY, ATA_IORDY, ATA_INTRQ, ATA_DA0, ATA_DA1, the corresponding continuous control of finishing the IDE hard disk of ATA_DASPN with the IDE hard-disk interface; Link to each other with the address date line of IDE hard-disk interface by address date multiplex bus ATADD0～ATADD15.Link to each other with IDE hard-disk interface reset signal by reset line ATA_RESETN.
The LSI2005F master chip is connected with the SMART clamp: master chip provides clock signal by the SCOCLK clock line for the SMART clamp; By control line SCOENN, SCOC4, SCOC8, SCOIO, SCODETECT and link to each other with the SMART clamp is corresponding respectively; Link to each other master chip and the control that has realized being connected of SMART clamp condition is received with SMART clamp reset signal by reset line SCORST.
The LSI2005F master chip is connected with the RS232 serial ports: master chip links to each other with the RS232 serial ports by TXD0, RXD0, can link to each other with computer by the RS232 serial ports, and program is upgraded.
The LSI2005F master chip is connected with the USB control chip: master chip is by exporting with the signal of having realized USB interface being connected of USB control chip.Master chip is sent chip selection signal by CSN2 for the USB control chip; Link to each other with the USB control chip by demultiplexing address bus ADDR0, by link to each other corresponding of control bus WRN, RDN finishing read-write control with the USB control chip; Link to each other with the data wire of USB control chip respectively by data/address bus AD0～AD7, link to each other with USB control chip reset signal by reset line RESETN.The USB control chip links to each other with USB interface by data wire DATA+, DATA-.
The numeral tuner receives the high-frequency digital signal by the transmission of CATV wire cable, finishes chnnel coding and QAM demodulation by inner function module, gives master control borad with the digital signal after the demodulation by digital interface.The numeral tuner has been simplified design greatly because embedded QAM demodulation chip is directly exported digital TS stream signal, has improved the Performance And Reliability of product.
The LSI2005F master chip is finished demultiplexing, MPEG-II audio/video decoding and 2D graphics process video coding and audio frequency digital-to-analogue conversion function, and be connected video output, audio output port output audio-video signal respectively through video encoder and audio digital to analog converter, drive the IDE hard disk simultaneously.The LSI2005F master chip is controlled by serial ports control pair RS232 interface.Memory has two kinds of FLASH and SDRAM, and SDRAM is made up of two of SDRAMA, SDRAMB.FLASH memory storage system program wherein, the SDRAM memory is deposited and is looked audio digital signals.USB interface is controlled and is driven by the USB control chip.
Master control borad links to each other with the SMART clamp by data-interface, and the SMART clamp is finished the condition receiving function, and user's TV reception is carried out descrambling and deciphering, finishes rating rights management and expenses management to the user.Described master chip is connected with the IR receiver by data-interface.
Claims (6)
1, a kind of digital TV set-top box based on cable TV network, comprise reception by the digital tuner of CATV wire cable carry high frequency digital signal with by digital interface and the master control borad that digital tuner is connected, it is characterized in that: described master control borad comprises master chip and FLASH memory that is connected with master chip by control bus, data/address bus and SDRAM memory; The embedded MIPS demultiplexing of master chip processor, MPEG-II audio/video decoding processor, video encoder, graphic process unit and audio digital to analog converter; The video encoder output is connected with video output, and the audio digital to analog converter output is connected with audio output port, and master control borad links to each other with the SMART clamp by data-interface.
2, the digital TV set-top box based on cable TV network according to claim 1 is characterized in that: described master chip is sent chip selection signal by ATACSN0 for the IDE hard-disk interface; By the corresponding continuous control of finishing the IDE hard disk of control bus with the IDE hard-disk interface; Link to each other with the address date line of IDE hard-disk interface by the address date multiplex bus, link to each other with IDE hard-disk interface reset signal by reset line.
3, the digital TV set-top box based on cable TV network according to claim 1 is characterized in that: described master chip provides clock signal by the SCOCLK clock line for the SMART clamp; Link to each other by control line is corresponding with the SMART clamp respectively, link to each other with SMART clamp reset signal, master chip and the control that has realized being connected of SMART clamp condition is received by reset line.
4, the digital TV set-top box based on cable TV network according to claim 1 is characterized in that: described master chip links to each other with the RS232 serial ports by TXD0, RXD0, can link to each other with computer by the RS232 serial ports, and program is upgraded.
5, the digital TV set-top box based on cable TV network according to claim 1, it is characterized in that: described master chip is by exporting with the signal of having realized USB interface being connected of USB control chip, and master chip is sent chip selection signal by CSN2 for the USB control chip; Master chip links to each other with the USB control chip by the demultiplexing address bus, by link to each other corresponding of control bus finishing read-write control with the USB control chip, link to each other with the data wire of USB control chip respectively by data/address bus, link to each other with USB control chip reset signal by reset line; The USB control chip links to each other with USB interface by data wire.
6, the digital TV set-top box based on cable TV network according to claim 1 is characterized in that: described master chip is connected with the IR receiver by data-interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200797392U CN2852558Y (en) | 2005-11-21 | 2005-11-21 | Digital television set-top box based on cable television network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200797392U CN2852558Y (en) | 2005-11-21 | 2005-11-21 | Digital television set-top box based on cable television network |
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| Publication Number | Publication Date |
|---|---|
| CN2852558Y true CN2852558Y (en) | 2006-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200797392U Expired - Lifetime CN2852558Y (en) | 2005-11-21 | 2005-11-21 | Digital television set-top box based on cable television network |
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| Country | Link |
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| CN (1) | CN2852558Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100533380C (en) * | 2007-11-30 | 2009-08-26 | 上海广电（集团）有限公司中央研究院 | Upgrade system and upgrade method based on DSP |
| CN102480640A (en) * | 2010-11-29 | 2012-05-30 | 康佳集团股份有限公司 | Digital set top box device and program prompting method thereof |
-
2005
- 2005-11-21 CN CNU2005200797392U patent/CN2852558Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100533380C (en) * | 2007-11-30 | 2009-08-26 | 上海广电（集团）有限公司中央研究院 | Upgrade system and upgrade method based on DSP |
| CN102480640A (en) * | 2010-11-29 | 2012-05-30 | 康佳集团股份有限公司 | Digital set top box device and program prompting method thereof |
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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 |
Owner name: XI AN YINGDONG SCIENCE CO., LTD. Free format text: FORMER NAME OR ADDRESS: XI AN ANMACO XINMA TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 710075 No. 66, No. two, hi tech Development Zone, Shaanxi, Xi'an Patentee after: Xi'an Ying Ying Polytron Technologies Inc Address before: 710075 No. 66, No. two, hi tech Development Zone, Shaanxi, Xi'an Patentee before: Xi'an Anmaco Xinma Technology Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20061227 |
|
| EXPY | Termination of patent right or utility model |