CN1753470A - Composite digital set top box - Google Patents
Composite digital set top box Download PDFInfo
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- CN1753470A CN1753470A CNA2005100304489A CN200510030448A CN1753470A CN 1753470 A CN1753470 A CN 1753470A CN A2005100304489 A CNA2005100304489 A CN A2005100304489A CN 200510030448 A CN200510030448 A CN 200510030448A CN 1753470 A CN1753470 A CN 1753470A
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Abstract
A complex digital set-top box includes: a modem part of satellite digital TV signals, a modem part of wire digital TV signals, a signal switch part, a de-multiplexer/decoder, video signal encoding and filer output part, an audio DA converter and an output and amplifying component, an inserted control circuit, an operation key and a display panel, an intelligent card interface and a switch regulated supply, among which, being a master control unit, the inserted control circuit is connected with and controls the modem of satellite digital TV signals, the modem of wire digital TV signals, the signal switch, the de-multiplexer/decoder, the video signal encoding and filter output parts, audio DA converter and output-amplifying components by a bus and connected with the operating keys, display panel and intelligent card interface by the GPIO interface.
Description
Technical field
What the present invention relates to is the device in a kind of digital television techniques field, relates in particular to a kind of combined digital set top boxes.
Technical background
Top box of digital machine is a kind ofly can provide analogue audio frequency and video interface, make existing simulated television can normally receive and watch the device of digital television program.Top box of digital machine is analog television broadcast gives full play to and keep the use value of simulated television a capital equipment from transition period to digital television broadcasting.Therefore, in the test and exploration process of digital television broadcasting, top box of digital machine will play an important role, and have very huge market prospects at analog television broadcast.At present, the main mode of digital television program broadcasting can be divided into cable digital TV broadcasting and digital video broadcast-satellite.In general, cable digital TV broadcasting mainly concentrates on the zone that population such as cities and towns is comparatively concentrated, and digital video broadcast-satellite mainly is distributed in the zone that population such as fringe region comparatively disperses.But along with the raising of digital broadcasting technology with popularize, the function of cable digital TV broadcasting and digital video broadcast-satellite will progressively trend towards complementation, and the regional boundary of its function will more and more trend towards compound.For example, in some cities, citizen not only wish to receive cable digital TV broadcasting, but also wish to receive digital video broadcast-satellite.Yet, the top box of digital machine of set-top box technique that existing patent documentation is disclosed and develops and production and sales at present is that function is too single mostly, and the development and the people that are difficult to adapt to present digital television broadcasting receive the demand that various digital television programs are broadcasted.
Find through literature search prior art, Chinese patent CN03806632.7, be entitled as " Modular set top box " (Chinese patent application day: 2003.03.17, patent announcement day: 2005.07.20, patent applicant: disclosed the low-down basic set-top box of a kind of cost Koninklijke Philips Electronics N.V).Although disclosed set-top box can have very cheap cost, its receiving function is also relatively very single.
Summary of the invention
At the defective that exists in the above-mentioned prior art, the invention provides a kind of combined digital set top boxes.Make it not only can effectively receive the cable digital TV programming, but also effective receiving satellite word television program broadcasting, thereby avoided present user when receiving cable digital TV broadcasting and digital video broadcast-satellite, need use two kinds of difference in functionality set-top box.
The present invention is achieved by the following technical solutions, the present invention includes: satellite digital TV signal tuning demodulation parts, the tuning demodulation parts of digital catv signal, signal switching part, demodulation multiplexer/decoder component, video signal coding and filtering output block, audio frequency DA transducer and output amplifier unit, embedded Control circuit, operation push-button and display floater, intelligent card interface and switching power supply.The interconnected relationship of each parts is: the input of satellite digital TV signal tuning demodulation parts is connecting the tuner that feedback connects satellite antenna, the input of the tuning demodulation parts of digital catv signal is connecting the open end of cable TV network, and the output of two parts is then connecting two inputs of signal switching part respectively; The output of signal switching part is directly connecting the input of demodulation multiplexer/decoder component, and two outputs of demodulation multiplexer/decoder component are then connecting video signal coding and filtering output block and audio frequency DA transducer and output amplifier unit respectively; Video signal coding and filtering output block are used for providing vision signal to simulated television, and audio frequency DA transducer and output amplifier unit then are used for providing audio signal to simulated television or other stereo set; Wherein, the embedded Control circuit block can be used as the main control unit of complete machine, passes through I
2The C bus connects respectively and is controlling satellite digital TV signal tuning demodulation parts, the tuning demodulation parts of digital catv signal, signal switching part, demodulation multiplexer/decoder component, video signal coding and filtering output block and audio frequency DA transducer and exporting amplifier unit, also connecting operation push-button and display floater parts and intelligent card interface parts, be used to control and coordinate inter-working and work schedule between each parts.In addition, switching power supply provides the dc supply of each parts of complete machine.
Satellite digital TV signal tuning demodulation parts comprise satellite-signal tuner and qpsk demodulator.Wherein, the satellite-signal tuner can amplify the received satellite-signal from the satellite antenna tuner (RF signal), filtering and double conversion, and converts thereof into two-way intermediate-freuqncy signal I and Q and import qpsk demodulator; Qpsk demodulator then will convert two ways of digital signals to by the I and the Q signal of tuner input, and the demodulation of qpsk demodulator, decode, deinterleave and descrambling after the transmission code stream of outputting standard.
The tuning demodulation parts of digital catv signal comprise cable signal tuner and qam demodulator.Wherein, the cable signal tuner is used to receive the RF signal from the cable television digital front end, through amplify and mixing after convert two-way intermediate-freuqncy signal I to and Q inputs to qam demodulator; Qam demodulator carries out digitized processing to form required digital data to I and the Q signal of being imported, and carries out QAM demodulation etc. subsequently and handles to form transmission code stream.
The signal switching part is made up of the two-way analog switching circuit, the operational order that it can be imported by remote controller or panel operation button according to the user under the control of embedded Control circuit realizes that the effective selection between satellite digital signal and the cabled digital signal is switched.
Demodulation multiplexer/decoder component comprises transmission flow demultiplexing device and MPEG2 decoder, wherein, demodulation multiplexer is used for transmission code stream is carried out demultiplexing, so that from the Voice ﹠ Video data of transmission extracting data selected program, and program specific information, information on services and enciphered data etc.; The MPEG2 decoder also comprises decoder, audio, video data buffer, a plurality of channel interface and the video display interface and the audio output interface of Voice ﹠ Video; Video Decoder and video data buffer are used for forming rebuilding module according to the coded format of MPEG2, promptly be reduced into encoding compression raw image data before, and output meets the video data that ITU-R601 advises, audio decoder and data buffer are analyzed the voice data of being imported and decoded and outputting audio data.
Video signal coding and filtering output block comprise video encoder and output filter, video encoder realize video data digital-to-analogue conversion, and can export the anolog TV signals of various standards according to the requirement of ITU-R601 suggestion; Output filter then is used to remove the noise in the band, promotes overall dynamic range.
Audio frequency DA transducer and output amplifier unit are realized the digital-to-analogue conversion of voice data, but the voice data that audio decoder is exported converts the audio analog signals of monophony, dual track or multichannel sterego as required to.
The embedded Control circuit comprises microcontroller, program storage (EPROM or FLASH), data storage (DRAM or SDRAM), bus driver and various interface circuit, constitute the control centre of complete machine, it mainly acts on is the work that is used to control and coordinate each component circuitry of complete machine, initialization and test, the security information of finishing machine system handled, communication interface standard is handled, the selection of input program is handled and tasks such as control and program, and can realize guidance panel interface and operation of IR remote controller interface and use according to user's needs.
Operation push-button and display floater comprise the LCD display floater that some can provide the operation push-button of user's direct control and be used to show the complete machine operating state, and the user can utilize these operation push-buttons and display floater to realize human-computer dialogue.
The system that intelligent card interface can provide realization condition to receive receives so that realize the condition of multiple different cipher modes.
Switching power supply provides the DC power supply of work for each parts of complete machine.
In addition, also can provide the IR remote controller, so that the user realizes remote operation.
In case when combined digital set top boxes of the present invention worked on power, the embedded Control circuit at first carried out the test of initialization operation and complete machine operating state to complete machine.In operating process, microcontroller can be directly fetch program instruction from the FLASH memory, and the step of fixing according to program carries out respective phases of operation, and microcontroller also reads the data that realize that operation is required from the SDRAM memory, to finish every function setting of complete machine.Because microcontroller can pass through I
2The C bus is connected with memory, video encoder and tuning demodulator, so microcontroller can pass through I
2The C bus reads the channel parameter that is stored in the memory, and passes through I
2The C bus is fed to the tuning demodulator parts with channel parameter, selects corresponding channel to control these parts according to parameter.Microcontroller also can pass through I
2The C bus is provided with video signal coding and filtering output block, makes it to realize the format conversion of vision signal and the output of anolog TV signals according to set working method.Microcontroller can be connected with display floater with signal switching part, intelligent card interface circuit, panel operation button (or receiver of remote-control sytem) respectively by the GPIO interface.Make that microcontroller can be by the decruption key of GPIO interface reading encrypted program from the intelligent card interface circuit; Also can be by the human-computer dialogue of GPIO interface realization with the user, so that read the selection mode signal of user, and the demonstration of the switching state of control signal switching part and realization complete machine operating state to satellite digital TV programme signal or cable digital TV decoded signal.Wherein, the demonstration of operating state comprises: the demonstration that the signal selection mode of satellite digital TV program or cable digital TV program, channel selection parameter, various time are provided with and the erroneous words demonstration of error status etc.
The satellite digital TV signal tuning demodulation parts of combined digital set top boxes of the present invention are accepted the RF signal of the tuner institute feed-in of satellite antenna, the RF signal of being imported carries out low noise amplification, filtering and double conversion by tuner, and convert thereof into second intermediate frequency, I that can export tuner and the Q signal numeral that converts two-way to subsequently, and by qpsk demodulator realize the signal demodulation, a series of processing such as decode and deinterleave, make it to form basic transmission code stream.The basic operation of the tuning demodulation parts of digital catv signal is similar to satellite digital signal tuning demodulation parts, different is, the tuning demodulation parts of digital catv signal are accepted the RF signal from cable TV network, after the input of RF signal, carry out relevant operations such as low noise amplification, filtering and frequency conversion earlier by the cable signal modulator, subsequently by qam demodulator carry out demodulation, deinterleave, a series of processing such as decoding, thereby make it to form basic transmission code stream.The signal switching part can realized switching between above-mentioned satellite TV signal or the cable TV signal according to user's selection under the control of microcontroller.Behind the signal switching part, perhaps export satellite digital TV signal or output digital catv signal.If the signal that the signal switching part is exported is a ciphered program, then microcontroller just reads the authorized user message in this machine of being arranged on smart card, and itself and the program authorization message that extracted from transmission code stream compared, in case both are consistent at condition, then can from qualified information, solve or obtain control word wherein, and can realize the descrambling of transmission code stream with this control word, thereby form the transmission code stream that meets Moving Picture Experts Group-2, otherwise, then need not to be decrypted and the operation of descrambling.In case import after the suitable data code flow, demodulation multiplexer/decoder component resolves into program stream with transmission code stream earlier, and then program stream is resolved into the elementary stream of audio frequency, video and exclusive data, the Voice ﹠ Video elementary stream is reduced into original Voice ﹠ Video data through the Voice ﹠ Video decoding, and the voice data and the video data of decode reduction is fed to audio frequency DA transducer and output amplifier unit and video signal coding and filtering output block respectively.Thereby can amplify output audible sound and compound vision signal or the S vision signal of video signal output part output by audio frequency amplifier.
Compare with the set-top box of traditional single receiving function, can realize effective switching between satellite digital TV signal and the digital catv signal easily according to user's selection under the control of embedded Control circuit according to combined digital set top boxes of the present invention, thereby make combined digital set top boxes not only can receive and export the satellite digital TV signal effectively, can also receive and export digital catv signal effectively.Combined digital set top boxes not only goes for the town dweller's use preferably of digital television signal reception environment, the resident that can also be applicable to the border district that the digital television signal reception environment is relatively poor uses, thereby helps further accelerating the digitized process of TV programme.
Description of drawings
Fig. 1 is the electric functional-block diagram of combined digital set top boxes of the present invention.
Embodiment
Fig. 1 has shown the electric functional-block diagram according to combined digital set top boxes of the present invention.As shown in Figure 1, combined digital set top boxes comprises: satellite digital TV signal tuning demodulation parts 1, the tuning demodulation parts 2 of digital catv signal, signal switching part 3, demodulation multiplexer/decoder component 4, video signal coding and filtering output block 5, audio frequency DA transducer and output amplifier unit 6, embedded Control circuit 7, operation push-button and display floater 8, intelligent card interface 9, and switching power supply 10.The interconnected relationship of each parts of combined digital set top boxes is: the input of satellite digital TV signal tuning demodulation parts 1 is connecting the tuner that feedback connects satellite antenna, the input of the tuning demodulation parts 2 of digital catv signal is connecting the open end of cable TV network, the output of satellite digital TV signal tuning demodulation parts 1 and the tuning demodulation parts 2 of digital catv signal then is being connected two inputs of signal switching part 3 respectively, signal switching part 3 outputs are directly connecting the input of demodulation multiplexer/decoder component 4, and the VT of demodulation multiplexer/decoder component 4 is being connected video signal coding and filtering output block 5 and audio frequency DA transducer and output amplifier unit 6 respectively with audio signal output end, video signal coding and filtering output block 5 are used for providing vision signal to simulated television, and audio frequency DA transducer and output amplifier unit 6 are used for providing audio signal to simulated television or stereo set, and embedded Control circuit block 7 passes through I
2The C bus connects respectively and is controlling satellite digital TV signal tuning demodulation parts 1, the tuning demodulation parts 2 of digital catv signal, signal switching part 3, demodulation multiplexer/decoder component 4, video signal coding and filtering output block 5 and audio frequency DA transducer and exporting amplifier unit 6, also connecting operation push-button and display floater parts 8 and intelligent card interface parts 9 by the GPIO interface, in addition, switching power supply 10 provides the dc supply of each parts of complete machine.
Satellite digital TV signal tuning demodulation parts 1 are used for the reception of satellite digital TV programme signal, tuning and demodulation, comprise satellite-signal tuner and qpsk demodulator (not shown).Wherein, the satellite-signal tuner can amplify the received satellite-signal from the satellite antenna tuner (RF signal), filtering and double conversion, and converts thereof into two-way intermediate-freuqncy signal I and Q and import qpsk demodulator; Qpsk demodulator then will convert two ways of digital signals to by I and the Q signal that tuner is imported, and in the demodulation of qpsk demodulator, decode, deinterleave and descrambling backward signal switching part 3 outputting standard transmission code streams.Certainly, satellite digital TV signal tuning demodulation parts 1 also can adopt incorporate tuning demodulator, for example, and Tuner TDQB-S001F.
The tuning demodulation parts 2 of digital catv signal are used for the reception of cable digital TV programme signal, tuning and demodulation, comprise cable signal tuner and qam demodulator (not shown).Wherein, the cable signal tuner is used to receive the RF signal from the cable television digital open end, through amplify and mixing after convert two-way intermediate-freuqncy signal I to and Q inputs to qam demodulator; Qam demodulator carries out digitized processing to form required digital data to I and the Q signal of being imported, and carry out QAM demodulation etc. subsequently and handle forming transmission code stream, and to the formed transmission code stream of signal switching part 3 outputs.The tuning demodulation parts 2 of digital catv signal also can use incorporate tuning demodulator.
Demodulation multiplexer/decoder component 4 comprises transmission flow demultiplexing device and MPEG2 decoder (not shown), wherein, demodulation multiplexer is used for the transmission code stream that has signal switching part 3 to be exported is carried out demultiplexing, so that from the Voice ﹠ Video data of transmission extracting data selected program, and program specific information, information on services and enciphered data etc.; The MPEG2 decoder comprises decoder, audio, video data buffer, a plurality of channel interface and the video display interface and the audio output interface of Voice ﹠ Video, Video Decoder and video data buffer are used for forming rebuilding module according to the coded format of MPEG2, promptly be reduced into encoding compression raw image data before, and output meets the video data that ITU-R601 advises.Audio decoder and data buffer are analyzed the voice data of being imported and are decoded and outputting audio data.
Video signal coding and filtering output block 5 are used for encoding video signal of being imported and signal filtering amplification are exported to simulated television, comprise video encoder and output filter (not shown).Wherein, video encoder can be realized the digital-to-analogue conversion of video data and export the anolog TV signals of various standards according to the requirement of ITU-R601 suggestion; Output filter then is used to remove the noise in the band, to promote overall dynamic range.
The audio signal that audio frequency DA transducer and output amplifier unit 6 are used for being imported realizes the DA conversion and amplifies simulated television or the analog audio equipment of exporting to, can realize the digital-to-analogue conversion of voice data, and the voice data that audio decoder is exported be converted as required to the audio analog signals of monophony, dual track or multichannel sterego.
Embedded Control circuit 7 comprises microcontroller, program storage (EPROM or FLASH), data storage (DRAM or SDRAM), bus driver and various interface circuit (not shown), constituted the main control unit of combined digital set top boxes complete machine, being used to control and coordinating inter-working and work schedule between each parts of complete machine, specifically is to pass through I
2The work of each component circuitry of complete machine is controlled and coordinated to the C bus, initialization and test, the security information of finishing the set-top box machine system handled, communication interface standard is handled, the selection of input program is handled and tasks such as control and program, and can realize operation push-button and display floater interface and operation of IR remote controller interface and use according to user's needs.
Operation push-button and display floater 8 comprise the LCD display floater that some can provide the operation push-button of user's direct control and be used to show the complete machine operating state, and the user can utilize these operation push-buttons and display floater to realize human-computer dialogue easily.
Intelligent card interface 9 is used to realize that the condition of set-top box receives, and the system that can provide realization condition to receive receives so that realize the condition of multiple different cipher modes.
Switching power supply 10 provides the working dc power of each workpiece of complete machine.
Particularly, when the user uses a teleswitch (not shown) or use panel button realization satellite digital TV signal and digital catv signal switching, just can use the simple and direct reception that realizes satellite digital TV program or cable digital TV program like a cork of separate unit set-top box easily.
Claims (10)
1. combined digital set top boxes, comprise: satellite digital TV signal tuning demodulation parts (1), the tuning demodulation parts of digital catv signal (2), signal switching part (3), demodulation multiplexer/decoder component (4), video signal coding and filtering output block (5), audio frequency DA transducer and output amplifier unit (6), embedded Control circuit (7), operation push-button and display floater (8), intelligent card interface (9) and switching power supply (10), it is characterized in that, the input of satellite digital TV signal tuning demodulation parts (1) is connecting the tuner that feedback connects satellite antenna, the input of the tuning demodulation parts of digital catv signal (2) is connecting the open end of cable TV network, the output of satellite digital TV signal tuning demodulation parts (1) and the tuning demodulation parts of digital catv signal (2) then is being connected two inputs of signal switching part (3) respectively, signal switching part (3) output is directly connecting the input of demodulation multiplexer/decoder component (4), and the VT of demodulation multiplexer/decoder component (4) is being connected video signal coding and filtering output block (5) and audio frequency DA transducer and output amplifier unit (6) respectively with audio signal output end, video signal coding and filtering output block (5) are used for providing vision signal to simulated television, and audio frequency DA transducer and output amplifier unit (6) are used for providing audio signal to simulated television or stereo set, embedded Control circuit block (7) connects respectively by the I2C bus and is controlling satellite digital TV signal tuning demodulation parts (1), the tuning demodulation parts of digital catv signal (2), signal switching part (3), demodulation multiplexer/decoder component (4), video signal coding and filtering output block (5) and audio frequency DA transducer and output amplifier unit (6), also connecting operation push-button and display floater parts (8) and intelligent card interface parts (9) by the GPIO interface, in addition, switching power supply (10) provides the dc supply of each parts of complete machine.
2. combined digital set top boxes as claimed in claim 1 is characterized in that, described satellite digital TV signal tuning demodulation parts (1) are used for the reception of satellite digital TV programme signal, tuning and demodulation, comprise satellite-signal tuner and qpsk demodulator; Wherein, the satellite-signal tuner to received satellite-signal from the satellite antenna tuner amplify, filtering and double conversion, and convert thereof into two-way intermediate-freuqncy signal I and Q and import qpsk demodulator; Qpsk demodulator then will convert two ways of digital signals to by I and the Q signal that tuner is imported, and in the demodulation of qpsk demodulator, decode, deinterleave and descrambling backward signal switching part (3) outputting standard transmission code stream.
3. combined digital set top boxes as claimed in claim 1 is characterized in that, the tuning demodulation parts of described digital catv signal (2) are used for the reception of cable digital TV programme signal, tuning and demodulation, comprise cable signal tuner and qam demodulator; Wherein, the cable signal tuner is used to receive the RF signal from the cable television digital open end, through amplify and mixing after convert two-way intermediate-freuqncy signal I to and Q inputs to qam demodulator; Qam demodulator carries out digitized processing to form required digital data to I and the Q signal of being imported, and carries out the QAM demodulation process subsequently with the formation transmission code stream, and exports formed transmission code stream to signal switching part (3).
4. combined digital set top boxes as claimed in claim 1, it is characterized in that, described signal switching part (3) is made up of the two-way analog switching circuit, under the control of embedded Control circuit (7),, realize that the effective selection between satellite digital signal and the cabled digital signal is switched according to the operational order of user by remote controller or panel button (8) input.
5. combined digital set top boxes as claimed in claim 1, it is characterized in that, described demodulation multiplexer/decoder component (4) comprises transmission flow demultiplexing device and MPEG2 decoder, wherein, demodulation multiplexer is used for the transmission code stream that has signal switching part (3) to be exported is carried out demultiplexing, so that from the Voice ﹠ Video data of transmission extracting data selected program, and program specific information, information on services and enciphered data; The MPEG2 decoder comprises decoder and audio, video data buffer, a plurality of channel interface and the video display interface and the audio output interface of Voice ﹠ Video, Video Decoder and video data buffer are used for forming rebuilding module according to the coded format of MPEG2, promptly be reduced into encoding compression raw image data before, and output meets the video data that ITU-R601 advises, audio decoder and data buffer are analyzed the voice data of being imported and decoded and outputting audio data.
6. combined digital set top boxes as claimed in claim 1, it is characterized in that, described video signal coding and filtering output block (5) are used for encoding video signal of being imported and signal filtering amplification are exported to simulated television, comprise video encoder and output filter; Wherein, video encoder is realized the digital-to-analogue conversion of video data and is exported the anolog TV signals of various standards according to the requirement of ITU-R601 suggestion; Output filter then is used to remove the noise in the band, promotes overall dynamic range.
7. combined digital set top boxes as claimed in claim 1, it is characterized in that, the audio signal that described audio frequency DA transducer and output amplifier unit (6) are used for being imported realizes the DA conversion and amplifies exporting simulated television or analog audio equipment to, comprises that the analog to digital converter that can realize the voice data digital-to-analogue conversion and the voice data that is used for that audio decoder is exported convert the output amplifier of the audio analog signals of monophony, dual track or multichannel sterego as required to.
8. combined digital set top boxes as claimed in claim 1, it is characterized in that, described embedded Control circuit (7) comprises microcontroller, program storage, data storage, bus driver and various interface circuit, constituted the main control unit of set-top box complete machine, be used to control and coordinate inter-working and work schedule between each parts of complete machine, specifically be the work of controlling and coordinate each component circuitry of complete machine by the I2C bus, finish the initialization and the test of set-top box machine system, security information is handled, communication interface standard is handled, the input program is selected to handle and control, and task such as program, and realize guidance panel interface and the operation of IR remote controller interface and use according to user's needs.
9. combined digital set top boxes as claimed in claim 1, it is characterized in that, described operation push-button and display floater (8) comprise the LCD display floater that some provide the operation push-button of user's direct control and are used to show the complete machine operating state, and the user utilizes these operation push-buttons and display floater to realize human-computer dialogue easily.
10. combined digital set top boxes as claimed in claim 1 is characterized in that, described intelligent card interface (9) is used to realize that the condition of set-top box receives, and the system that can provide realization condition to receive receives so that realize the condition of multiple cipher mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100304489A CN1753470A (en) | 2005-10-13 | 2005-10-13 | Composite digital set top box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100304489A CN1753470A (en) | 2005-10-13 | 2005-10-13 | Composite digital set top box |
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| Publication Number | Publication Date |
|---|---|
| CN1753470A true CN1753470A (en) | 2006-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100304489A Pending CN1753470A (en) | 2005-10-13 | 2005-10-13 | Composite digital set top box |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102026031A (en) * | 2010-12-28 | 2011-04-20 | 张朝晖 | Set top box |
| CN102572587A (en) * | 2012-02-22 | 2012-07-11 | 广东九联科技股份有限公司 | Set-top box and method for quickly switching channel |
| CN102769797A (en) * | 2012-06-29 | 2012-11-07 | 中山大学 | Set-top box image engine system |
| CN104363497A (en) * | 2014-10-30 | 2015-02-18 | 成都康特电子高新科技有限责任公司 | Highly-jamproof interactive high-definition set-top box based on broadcasting gateway system |
| CN104363498A (en) * | 2014-10-30 | 2015-02-18 | 成都康特电子高新科技有限责任公司 | High-sensitivity interactive high-definition set-top box based on broadcasting gateway system |
| TWI563854B (en) * | 2013-12-17 | 2016-12-21 | Wistron Neweb Corp | Signal switch device and satellite signal receiver |
| CN111083542A (en) * | 2019-12-30 | 2020-04-28 | 深圳市九洲电器有限公司 | Vehicle-mounted satellite television system and set top box |
-
2005
- 2005-10-13 CN CNA2005100304489A patent/CN1753470A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102026031A (en) * | 2010-12-28 | 2011-04-20 | 张朝晖 | Set top box |
| CN102026031B (en) * | 2010-12-28 | 2013-09-04 | 张朝晖 | Set top box |
| CN102572587A (en) * | 2012-02-22 | 2012-07-11 | 广东九联科技股份有限公司 | Set-top box and method for quickly switching channel |
| CN102572587B (en) * | 2012-02-22 | 2014-02-19 | 广东九联科技股份有限公司 | Set-top box and method for quickly switching channel |
| CN102769797A (en) * | 2012-06-29 | 2012-11-07 | 中山大学 | Set-top box image engine system |
| TWI563854B (en) * | 2013-12-17 | 2016-12-21 | Wistron Neweb Corp | Signal switch device and satellite signal receiver |
| CN104363497A (en) * | 2014-10-30 | 2015-02-18 | 成都康特电子高新科技有限责任公司 | Highly-jamproof interactive high-definition set-top box based on broadcasting gateway system |
| CN104363498A (en) * | 2014-10-30 | 2015-02-18 | 成都康特电子高新科技有限责任公司 | High-sensitivity interactive high-definition set-top box based on broadcasting gateway system |
| CN111083542A (en) * | 2019-12-30 | 2020-04-28 | 深圳市九洲电器有限公司 | Vehicle-mounted satellite television system and set top box |
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