CN201585053U - Television - Google Patents

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Publication number
CN201585053U
CN201585053U CN2009202057136U CN200920205713U CN201585053U CN 201585053 U CN201585053 U CN 201585053U CN 2009202057136 U CN2009202057136 U CN 2009202057136U CN 200920205713 U CN200920205713 U CN 200920205713U CN 201585053 U CN201585053 U CN 201585053U
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China
Prior art keywords
signal
demodulator
master chip
output
analog
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Expired - Fee Related
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CN2009202057136U
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Chinese (zh)
Inventor
杨杨
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Shenzhen TCL New Technology Co Ltd
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Shenzhen TCL New Technology Co Ltd
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Priority to CN2009202057136U priority Critical patent/CN201585053U/en
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Abstract

The utility model provides a television comprising a tuner, a demodulator and a master chip, wherein the tuner is connected with the demodulator to acquire high-frequency signals for amplification and frequency conversion processing output, and outputs analog intermediate-frequency signals or digital intermediate-frequency signals; the demodulator receives the analog intermediate-frequency signals or the digital intermediate-frequency signals output by the tuner, demodulates and outputs CVBS video signals and analog audio signals to the analog intermediate-frequency signals, demodulates and outputs TS flow to the digital intermediate-frequency signals, and sends the CVBS video signals and the analog audio signals or the TS flow to the master chip; and the master chip receives the CVBS video signals and the analog audio signals or the TS flow sent by the demodulator, and performs analog/digital (A/D) conversion to the CVBS video signals and the analog audio signals or de-multiplex and signal source decoding to the TS flow, so as to obtain video signals. By adding the demodulator, the utility model can not only receive various television signals, but also demodulate the television signals directly through the demodulator into video signals, thereby eliminating external set-top boxes, saving the space, and facilitating the operation.

Description

TV
Technical field
The utility model relates to the digital broadcasting communications field, is specifically related to a kind of TV.
Background technology
Along with the continuous progress of society and the continuous development of science and technology, more and more higher in digital broadcasting communications field user's requirement, traditional TV program transmitting form has not more and more satisfied user's demand yet; Therefore Digital Television occurs, Digital Television is meant from the TV programme collection, records, broadcasts emission, receives the TV of new generation that all adopts digital coding, be on the digital technology basis, TV programme to be converted into digital information (0,1), with the TV form that the code stream form is propagated, combine multiple advanced technologies such as digital compression, multiplexed, error correction coding, modulation.
The terminal pattern of China's employing at present adds the pattern of television set based on set-top box, promptly convert digital television signal to CVBS (Composite Video BroadcastSignal that TV can show by set-top box, the composite video broadcast singal), audio frequency/YC, audio frequency/YPbPr, audio frequency/HDMI (HighDefinition Multimedia Interface, HDMI (High Definition Multimedia Interface)) etc. signal format shows on television set again.
In implementation process, the present inventor finds, according to different digital television transfer standards and concrete programme information, the kind of set-top box relates to wired high definition/SD set-top box, ground high definition/SD set-top box, satellite high definition/SD set-top box, watch the program of high-definition effect need have high definition set-top box and HDTV simultaneously; The client need operate two remote controller in addition, uses trouble; Need ornaments two electronic product, resource takes up room.
Summary of the invention
One of the purpose of this utility model for provide a kind of need not external set-top box, can watch the TV of analog signal TV programme and digital signal TV programme.
Described TV comprises:
Tuner, analog demodulator, ground digital signal demodulation module, cabled digital demodulator of PM signal PM and master chip;
Tuner connects demodulator, is used to select channel, obtains high-frequency signal and amplifies and frequency-conversion processing output, and output analog if signal or digital medium-frequency signal are to demodulator;
Demodulator connects described tuner and master chip, receives the analog if signal or the digital medium-frequency signal of tuner output, to analog if signal demodulation output CVBS vision signal and simulated audio signal; To digital medium-frequency signal demodulation output TS (Transport Stream, transport stream) stream; Send described CVBS vision signal and simulated audio signal or TS and flow to master chip;
Master chip, connect demodulator, be used for CVBS vision signal and simulated audio signal or TS stream that the receiving demodulation device sends, described CVBS vision signal and simulated audio signal carried out mould/number (A/D) is changed or TS stream carries out demultiplexing and source coding obtains vision signal.
The utility model embodiment can receive multiple TV signal by increasing demodulator, and TV signal is directly play by generating vision signal after the demodulator demodulation, need not external set-top box, and it is simultaneously easy to operate to have saved the space.
Description of drawings
Fig. 1 is the structure chart of the utility model one embodiment;
Fig. 2 is the structure chart of another embodiment of the utility model.
The realization of the utility model purpose, functional characteristics and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
The purpose of this utility model is to provide a kind of TV, can directly handle digital television signal, compatible multiple digital television transfer standard, and compatible traditional analog television.
With reference to Fig. 1, the structure chart of the utility model one embodiment is proposed;
The utility model embodiment can receive analog signal, wired high definition/SD signal, and ground high definition/SD signal is totally five kinds of signal modes, so be called for short five pattern one TVs.Now its operation principle is described in conjunction with Fig. 1.
The TV that the utility model embodiment provides comprises: tuner 11, demodulator 12 and master chip 13, and display 14 that is used to show and the voice output 15 that is used for sounding.
Tuner 11 connects demodulator 12, is used to select channel, obtains high-frequency signal and amplifies and frequency-conversion processing output, and output analog if signal or digital medium-frequency signal are to demodulator;
The tuner 11 that present embodiment provides is digital-analog integrated tuner, and its inside comprises analog signal, digital signal passage, is used for channel selection, high-frequency signal amplification and frequency-conversion processing, output analog if signal or digital medium-frequency signal.During Analog signals, the analog signal conducting; When handling ground digital signal or cabled digital signal, the conducting of digital signal passage.
Demodulator 12 connects described tuner 11 and master chip 13, receives the analog if signal or the digital medium-frequency signal of tuner 11 outputs, to analog if signal demodulation output CVBS vision signal and simulated audio signal; To digital medium-frequency signal demodulation output TS stream; Send described CVBS vision signal and simulated audio signal or TS and flow to master chip 13;
Master chip 13, connect demodulator 12, be used for CVBS vision signal and simulated audio signal or TS stream that receiving demodulation device 12 sends, described CVBS vision signal and simulated audio signal carried out mould/number (A/D) is changed or TS stream carries out demultiplexing and source coding obtains vision signal.
Concrete, master chip 13 groundworks comprise the response external work order; By total each the module operating state of line traffic control of IIC (interintegrated circiut bus, internal integrate circuit bus); The A/D conversion of analog signal; The demultiplexing and the source coding of TS stream; The Deinterlace of surface sweeping line by line of vision signal and convergent-divergent Scale etc.A plurality of TV programme may be transmitted by a shared frequency, so need a plurality of programs in the frequency be decomposed out by demultiplexing.Because signal source may be interlacing, and the LCD TV demonstration is line by line, can well convert interlace signal to progressive signal by Deinterlace.The effect of Scale is the display mode (for example 1920 * 1080 of high definition) that the signal source of different resolution is converted to given resolution.
Display 14 connects master chip 13, and the vision signal that receives master chip 13 transmissions shows.
Described display 14 can be that CRT (Crystal Ray Tube, cathode ray tube) display also can be a LCD.
Voice output 15 connects master chip, receives the audio signal sounding that master chip sends.
The utility model embodiment can receive multiple TV signal by increasing demodulator, and TV signal is directly play by generating vision signal after the demodulator demodulation, need not external set-top box, and it is simultaneously easy to operate to have saved the space.
With reference to Fig. 2, the structure chart of another embodiment of the utility model is proposed;
The TV that the utility model embodiment provides comprises: tuner 21, demodulator 22 and master chip 23, and display 24 that is used to show and the voice output 26 that is used for sounding; Described demodulator 22 also comprises: analog demodulator 221, ground digital signal demodulation module 222 and cabled digital demodulator of PM signal PM 223.
Tuner 21 connects demodulator 22, is used to select channel, obtains high-frequency signal and amplifies and frequency-conversion processing output, and output analog if signal or digital medium-frequency signal are to demodulator;
The tuner 21 that present embodiment provides is digital-analog integrated tuner, and its inside comprises analog signal, digital signal passage, is used for channel selection, high-frequency signal amplification and frequency-conversion processing, output analog if signal or digital medium-frequency signal.During Analog signals, the analog signal conducting; When handling ground digital signal or cabled digital signal, the conducting of digital signal passage.
Demodulator 22 connects described tuner 21 and master chip 23, receives the analog if signal or the digital medium-frequency signal of tuner 21 outputs, to analog if signal demodulation output CVBS vision signal and simulated audio signal; To digital medium-frequency signal demodulation output TS stream; Send described CVBS vision signal and simulated audio signal or TS and flow to master chip 23;
Described demodulator 22 inside can also comprise:
Analog demodulator 221, analog if signal is carried out demodulation, output PAL/NTSC (PhaseAlternating Line/National Television System Committee, the line-by-line inversion/American National television system committee) system CVBS vision signal and simulated audio signal;
The analog demodulator 221 that present embodiment provides is supported the analog signal of PAL/NTSC system; When the television channel of described tuner 21 receptions is analog signal, by conversion output analog if signal, after described demodulator 22 receives described analog if signal, 221 pairs of analog if signals of described analog demodulator carry out demodulation, generate PAL/NTSC system CVBS vision signal and simulated audio signal output.
Ground digital signal demodulation module 222 is separated the mediation channel-decoding to the terrestrial DTV intermediate-freuqncy signal and is obtained TS stream and output;
Originally the ground digital signal demodulation module 222 that provides is supported terrestrial DTV national standard DTMB technology, same, when the television channel of described tuner 21 receptions is ground digital television signal, the terrestrial DTV intermediate-freuqncy signal is separated the mediation channel-decoding, output MPEG-2, MPEG-4, H.264, coded format TS such as AVS stream, because the deal with data amount is bigger, carries out metadata cache so need add SDRAM.
More excellent, because described ground digital signal demodulation module 222 deal with data amounts are bigger, so the described ground digital signal demodulation module 222 that present embodiment also provides also comprises:
Processing module 222a is used for that the terrestrial DTV intermediate-freuqncy signal is separated the mediation channel-decoding and obtains TS stream and output;
Cache module 222b connects described processing module 222a, the data that generate when being used for the described processing module demodulating and decoding of buffer memory.Described cache module 222b can be SDRAM (Synchronous DynamicRandom Access Memory, a synchronous DRAM).
Cabled digital demodulator of PM signal PM 223 is separated the mediation channel-decoding to the cable digital TV intermediate-freuqncy signal, obtains TS stream and output.
The cabled digital signal demodulation module 223 that present embodiment provides is supported wire transmission DVB-C standard; When the television channel that receives when described tuner 21 is digital catv signal, the cable digital TV intermediate-freuqncy signal is separated the mediation channel-decoding, output MPEG-2, MPEG-4, H.264, coded format TS stream such as AVS.
Master chip 23, connect demodulator 22, be used for CVBS vision signal and simulated audio signal or TS stream that receiving demodulation device 22 sends, described CVBS vision signal and simulated audio signal carried out mould/number (A/D) is changed or TS stream carries out demultiplexing and source coding obtains vision signal.
Further, described master chip 23 can also comprise:
Surface sweeping module 231 is used for the vision signal generation progressive video signal of lining by line scan;
Zoom module 232 is used for the vision signal of different resolution is converted to the display mode of specified format.
Concrete, master chip 23 groundworks comprise the response external work order; Control each module operating state by iic bus; The A/D conversion of analog signal; The demultiplexing and the source coding of TS stream; The Deinterlace of vision signal and Scale etc.A plurality of TV programme may be transmitted by a shared frequency, so need a plurality of programs in the frequency be decomposed out by demultiplexing.Because signal source may be interlacing, and the LCD TV demonstration is line by line, and carrying out Deinterlace by surface sweeping module 231 can well convert interlace signal to progressive signal.Surface sweeping module 231 converts the signal source of different resolution to by Scale the display mode (for example 1920 * 1080 of high definition) of given resolution.
More excellent, present embodiment also provides CAM card 25, and is connected demodulator 22 and master chip 23, be used for when the TS stream of demodulator 22 outputs when adding flow-disturbing, described TS stream is carried out sending to master chip 23 behind the descrambling.
Display 24 connects master chip 23, and the vision signal that receives master chip 23 transmissions shows.
Described display 24 can be that CRT monitor also can be a LCD.
Voice output 26 connects master chip 23, receives the audio signal sounding that master chip sends.
Function during below by concrete the use explains the further instruction present embodiment.：
The operating state of the TV that present embodiment provides can be selected by the client is subjective, the client can make television system work in the treatment of simulated TV signal, handle states such as ground digital television signal and digital catv signal by remote controller generation control command notice master chip 23.
Divide the explanation that makes an explanation of work state below:
During the treatment of simulated TV signal, master chip 23 sends control signals to tuner 21, makes tuner 21 analog signal channel conductings, closes 3 TS stream service aisles of master chip 23 self simultaneously.The work of the analog demodulator 221 in the demodulator 22 is effective at this moment, after master chip 23 receives CVBS and simulated audio signal, the CVBS signal is carried out exporting 1920 * 1080 LVDS (Low Voltage Differential Signal after A/D conversion, light tone separation, the processing such as Deinterlace, Scale, Low Voltage Differential Signal) signal is given display 24, simultaneously simulated audio signal is carried out digitized processing such as A/D after output IIS signal give audio output device 26 (for example loudspeaker or power amplifier).
When handling ground digital television signal, master chip 23 provides control signal and makes tuner 21 digital signal passage conductings, opens " the TS stream 1 " passage of oneself simultaneously, closes passages such as " CVBS+AUDIO ", " TS stream 2 ", " TS stream 3 ".Ground digital signal demodulation module 222 work this moment effectively, master chip carries out demultiplexing and source coding after receiving TS stream, decoded vision signal is carried out export after the processing such as Deinterlace, Scale and LVDS coding 1920 * 1080 LVDS signal and give display screen, simultaneously audio signal is converted to the IIS signal and be defeated by audio output device 26.
When handling digital catv signal, master chip 23 provides control signal and makes tuner 21 digital signal passage conductings.This moment, whether the service aisle switch situation of master chip 23 decide on the insertion of CAM card 25, if having CAM card 25 to insert then open " TS stream 3 " passage, closed passages such as " CVBS+AUDIO ", " TS stream 1 ", " TS flows 2 "; If do not have CAM card 25 to insert then open " TS stream 2 " passage, close passages such as " CVBS+AUDIO ", " TS stream 1 ", " TS stream 3 ".Master chip can flow whether scrambling is judged to TS, if for adding flow-disturbing, but the client does not insert CAM card 25, and master chip can give the client with corresponding prompt information.If TS stream is free flow, can not occur unusual even then insert CAM card 25 yet.Master chip 23 obtains after the TS stream behind TS free flow or the descrambling, carry out demultiplexing and source coding, decoded vision signal is carried out export after the processing such as Deinterlace, Scale and LVDS coding 1920 * 1080 LVDS signal and give display screen, simultaneously audio signal is converted to the IIS signal and be defeated by audio output device 26.
The utility model embodiment can receive multiple TV signal by increasing demodulator, and TV signal is directly play by generating vision signal after the demodulator demodulation, need not external set-top box, and it is simultaneously easy to operate to have saved the space.
The above only is a preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.

Claims (7)

1. a TV is characterized in that, comprises tuner, demodulator and master chip;
Tuner connects demodulator, is used to select channel, obtains high-frequency signal and amplifies and frequency-conversion processing output, and output analog if signal or digital medium-frequency signal are to demodulator;
Demodulator connects described tuner and master chip, receives the analog if signal or the digital medium-frequency signal of tuner output, to analog if signal demodulation output composite video broadcast singal CVBS vision signal and simulated audio signal; To digital medium-frequency signal demodulation output transmission TS stream; Send described CVBS vision signal and simulated audio signal or transmit TS and flow to master chip;
Master chip connects demodulator, is used for CVBS vision signal and simulated audio signal or TS stream that the receiving demodulation device sends, with described CVBS vision signal with simulated audio signal carries out mould/number conversion or TS stream carries out demultiplexing and source coding obtains vision signal.
2. TV according to claim 1 is characterized in that, described demodulator comprises:
Analog demodulator carries out demodulation to analog if signal, and output line-by-line inversion/American National television system committee formulates PAL/NTSC system CVBS vision signal and simulated audio signal;
Ground digital signal demodulation module is separated the mediation channel-decoding to the terrestrial DTV intermediate-freuqncy signal and is obtained TS stream and output;
The cabled digital demodulator of PM signal PM is separated the mediation channel-decoding to the cable digital TV intermediate-freuqncy signal, obtains TS stream and output.
3. TV according to claim 2 is characterized in that, described ground digital signal demodulation module also comprises:
Processing module is used for that the terrestrial DTV intermediate-freuqncy signal is separated the mediation channel-decoding and obtains TS stream and output;
Cache module connects described processing module, the data that generate when being used for the described processing module demodulating and decoding of buffer memory.
4. TV according to claim 1 is characterized in that, described TV also comprises:
The CAM card connects demodulator and master chip, is used for flowing when adding flow-disturbing as the TS of demodulator output, and described TS stream is carried out sending to master chip behind the descrambling.
5. TV according to claim 1 is characterized in that, described master chip comprises:
The surface sweeping module is used for the vision signal generation progressive video signal of lining by line scan;
Zoom module is used for the vision signal of different resolution is converted to the display mode of specified format.
6. TV according to claim 1 is characterized in that, described TV also comprises:
Display connects master chip, and the vision signal that receives the master chip transmission shows.
7. TV according to claim 1 is characterized in that, described TV also comprises:
Voice output connects master chip, receives the audio signal sounding that master chip sends.
CN2009202057136U 2009-09-28 2009-09-28 Television Expired - Fee Related CN201585053U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102316289A (en) * 2010-07-09 2012-01-11 深圳Tcl新技术有限公司 Menu processing method for dual-chip television scheme
CN105898162A (en) * 2015-11-20 2016-08-24 乐视致新电子科技（天津）有限公司 Analog television signal processing device and multimedia playback device
WO2017101358A1 (en) * 2015-12-13 2017-06-22 乐视控股（北京）有限公司 Signal demodulation capable module and device
CN108174263A (en) * 2017-12-29 2018-06-15 广州长嘉电子有限公司 The method and system of anolog TV signals processing are realized based on COAX modules

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102316289A (en) * 2010-07-09 2012-01-11 深圳Tcl新技术有限公司 Menu processing method for dual-chip television scheme
CN105898162A (en) * 2015-11-20 2016-08-24 乐视致新电子科技（天津）有限公司 Analog television signal processing device and multimedia playback device
WO2017101358A1 (en) * 2015-12-13 2017-06-22 乐视控股（北京）有限公司 Signal demodulation capable module and device
CN108174263A (en) * 2017-12-29 2018-06-15 广州长嘉电子有限公司 The method and system of anolog TV signals processing are realized based on COAX modules
CN108174263B (en) * 2017-12-29 2020-10-20 广州长嘉电子有限公司 Method and system for realizing analog television signal processing based on COAX technology

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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: 20100915

Termination date: 20170928

CF01 Termination of patent right due to non-payment of annual fee