CN101795368A - Realization method for digital and analogue integration of liquid crystal TV based on DTMB (Digital Television Terrestrial Multimedia Broadcasting) - Google Patents
Realization method for digital and analogue integration of liquid crystal TV based on DTMB (Digital Television Terrestrial Multimedia Broadcasting) Download PDFInfo
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- CN101795368A CN101795368A CN201010300004A CN201010300004A CN101795368A CN 101795368 A CN101795368 A CN 101795368A CN 201010300004 A CN201010300004 A CN 201010300004A CN 201010300004 A CN201010300004 A CN 201010300004A CN 101795368 A CN101795368 A CN 101795368A
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Abstract
The invention discloses a realization method for digital and analogue integration of a liquid crystal TV based on DTMB (Digital Television Terrestrial Multimedia Broadcasting). In the realization method, a multifunctional decoding chip MST6M68FQ and a digital terrestrial wave channel decoding chip LGS8G52 are used as the core; the liquid crystal TV is only connected with an analogue wired TV antenna and a digital ground TV antenna without externally connecting with a ground wave set top box and can receive the analogue and DTMB digital terrestrial TV signals at the same time. On the basis, the complete TV is provided with a 100/120 hertz image multi-frame frequency module having environment-friendly and ultra-low power consumption standby function and having functions of motion compensation and image quality improvement.
Description
Technical field
The present invention relates to the digital television techniques field, especially a kind of based on the digital analog integrated implementation method of the LCD TV of DTMB.
Background technology
The issue of China digital terrestrial television DTMB transmission standard and testing standard, national a plurality of cities started broadcasting in succession high definition and SD digital terrestrial television business, the programme variety and the quality that provide improve day by day; The consumer only needs at home the small and exquisite antenna of circumscribed volume just can watch the digital signal program of high-quality.
Approaching prior art comprises 200720118930.2 1 kinds of analogue digital integrated televisions, comprise audio frequency and video output module, digital processing chip, digital analog integrated tuner, channel demodulator, digital video decoder and audio signal processor, digital analog integrated tuner can receiving digital signals and analog signal, and the analog rgb signal of output and corresponding audio signal are delivered to the audio frequency and video output module.
Summary of the invention
The purpose of this invention is to provide a kind of external ground ground roll set-top box that do not need, only need insert analog catv antenna and digital terrestrial television antenna respectively, just can receive the digital analog integrated implementation method of the LCD TV based on DTMB of simulation and DTMB digital terrestrial television signals simultaneously.
Based on the digital analog integrated implementation method of the LCD TV of DTMB, comprise multi-functional decoding chip MST6M68FQ and digital terrestrial channel decoding chip LGS8G52, insert analog catv antenna and digital terrestrial television antenna respectively, television set receives anolog TV signals through after the digital-analog integrated tuner demodulation process, directly exports CVBS video and SIF second accompanying sound intermediate frequency signal; The AV and the y/c signal of this CVBS vision signal and other external inputs directly enter multi-functional decoding chip MST6M68FQ, handle (AFEC) through AFE (analog front end), 3 D comb filterings, after picture decoding is handled, signal together with YPbPr and VGA passage, be transformed to digital signal through ADC, again with HDMI, digital ground signal TS streaming digital signal after USB multimedia code stream and the demodulation, pass through picture decoding, intelligence is colored to be strengthened, dynamic brightness control, acutance strengthens and digital noise suppresses, after numeral SCALER handles, form the LVDS signal and deliver to 100/120HZ image times frame frequency module, the TCON plate of delivering to liquid crystal display screen through process of frequency multiplication again carries out last image scanning, finishes the reproduction of video image; On the other hand, the second accompanying sound intermediate frequency signal SIF of tuner output also is sent to multi-functional decoding chip MST6M68FQ, it is single-audio MONO or beautiful sound NICAM that system judges signal through demodulation process, and then to the audio signal of the audio signal that demodulates and other external inputs through pre-amplification, pitch curve and five sections balanced adjustment, deliver to audio power amplifier at last and amplify, finish the reproduction of sound.
Beneficial effect of the present invention:
The present invention is a core with multi-functional decoding chip MST6M68FQ and digital terrestrial channel decoding chip LGS8G52, do not need external ground ground roll set-top box, only need insert analog catv antenna and digital terrestrial television antenna respectively, just can receive simulation and DTMB digital terrestrial television signals simultaneously, complete machine has also added the super low-power consumption idle function and the 100/120HZ image times frame frequency module with motion compensation and image quality improving function of environmental protection on this basis.
Description of drawings
The present invention will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is an overall flow schematic diagram of the present invention;
Fig. 2 is super low-power consumption standby modular structure figure;
Fig. 3 is 100/120HZ image times frame frequency modular structure figure;
Fig. 4 is a DTMB passage demodulation module structure chart.
Embodiment
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
The implementation method module frame chart that the LCD TV based on DTMB of present embodiment as shown in Figure 1 is digital analog integrated, its groundwork flow process is: television set receives anolog TV signals through after the digital-analog integrated tuner demodulation process, directly exports CVBS video and SIF second accompanying sound intermediate frequency signal; The AV and the y/c signal of this CVBS vision signal and other external inputs directly enter multi-functional decoding chip MST6M68FQ, handle (AFEC) through AFE (analog front end), the 3-D comb filtering, after picture decoding is handled, signal together with YPbPr and VGA passage, be transformed to digital signal through ADC, again with HDMI, digital ground signal TS streaming digital signal after USB multimedia code stream and the demodulation, pass through picture decoding, intelligence is colored to be strengthened, dynamic brightness control, acutance strengthens and digital noise suppresses, after numeral SCALER handles, form the LVDS signal and deliver to 100/120HZ image times frame frequency module, the TCON plate of delivering to liquid crystal display screen through process of frequency multiplication again carries out last image scanning, finishes the reproduction of video image; On the other hand, the second accompanying sound intermediate frequency signal SIF of tuner output also is sent to multi-functional decoding chip MST6M68FQ, it is single-audio MONO or beautiful sound NICAM that system judges signal through demodulation process, and then to the audio signal of the audio signal that demodulates and other external inputs through pre-amplification, pitch curve and five sections balanced adjustment, deliver to audio power amplifier at last and amplify, finish the reproduction of sound.
Super low-power consumption standby modular structure figure as shown in Figure 2 by adopting brand-new low loss power supply integrated chip STR-A6059H and standby MCU-P89LPC915FDH framework, thereby has reached below the 0.1W standby power.Behind the standby module incoming transport electricity, arrive STR-A6059H and trigger its starting of oscillation after one tunnel process EMI filter network, the full-bridge rectification, thereby produce 3.3V, and offer standby MCU by switch transformer and voltage stabilizing feedback network; Another road then is connected to main power source module by relay.Behind the MCU electrification reset, but by remote control or the start of button secondary, this moment, MCU sent the POWER_ON signal, wherein No. one control relay switch is the main power source module power supply, other one the tunnel controls two groups of metal-oxide-semiconductor Q1, Q2 makes standby module remote signal IR_DATA and button Opportunity awaiting control for linear signal POWER_OFF interconnected with remote signal IR_DATA_MCU and the button Opportunity awaiting control for linear signal POWER_OFF_MCU of MST6M68 respectively, reaches the seamless switching to main power source module and standby module for power supply.
This digital analog integrated implementation method is used the super low-power consumption standby, power button high level, remote control receive head start pwm signal and wake standby MCU process T1 up after the time under the holding state, POWER ON puts height, open main power source power supply and buffer circuit and finish the release of each control signal, main MCU obtains power supply T2 after the time, start other parts of movement, enter start, other invalidating signal in this process; Power button high level under the open state, remote control receive a head shutdown pwm signal, POWER OFF signal and enter reason such as protection owing to system and put high T3 after the time; standby MCU puts POWER ON signal low; close main power source and cut off all and the communication of movement; finish above operation T4 after the time; standby MCU enters park mode automatically, other invalidating signal in this process.
Described 100/120HZ image times frame frequency module as shown in Figure 3, employing is the image times frame frequency module of core with MST6M10L frame-rate conversion processing IC, two-channel digital LVDS code stream after MST6M68FQ handles, deliver to MST6M10L by build-out resistor network Ra and shielded signal wire, pass through processing such as motion blur and jitter elimination, motion frame-rate conversion, independent RGB gamma corrected again, deliver to liquid crystal display screen TCON plate at last by build-out resistor network Rc and the last screen of four-way LVDS line and carry out the image scanning reproduction; MST6M10L and MST6M68FQ adopt iic bus to carry out interconnected control in the system.
DTMB passage demodulator circuit method of work as shown in Figure 4, the radiofrequency signal that external antenna receives TV station's emission enters tuner through the digital input port of digital analog integrated tuner, after carrying out mixing, frequency reducing and sound table Filtering Processing with local oscillator, output IF differential signal; Again through being input to channel decoder LGS8G52 behind capacitor C 1, C2 coupling and the direct current biasing; In IC, handle → go that time shift interweaves and decoding FEC (LDPC+BCH) then → go to be reduced to TS stream after the data perturbation processing and output to MST6M68FQ through ADC conversion → TDS-OFDM demodulation → digital AGC feedback compensation → carrier wave recovery/channel estimating/recover synchronously → go frequency-domain-interleaving and FFT frame.
Numerical portion demodulation and coding/decoding method:
Digital signal receives and is decoded as the main process of ES stream from tuner:
1. channel demodulation part;
2. demultiplexing part: finished by the Demux module, its effect is that data are extracted from code stream, realizes the reception of data by the filter of software setting.Here adopted more advanced code stream property sort to handle, be placed among the corresponding BUFFER after resolving by hardware, received data mode according to BUFFER and resolve respective table by SIGNAL triggering respective application layer.This Module Design method:
(1) the Demux module is that a interface to bottom PTI module converges, be that work that a series of settings, request for data PTI are filtered pools an interface layer and outwards provides, it is stable and function is correct that the stability of Demux and correctness depend on the interface of PTI module;
(2) the PTI module is divided into two-stage on hardware, filter the satisfactory data of PID (SE) earlier, refilter the satisfactory data of table_id (SF), utilize Buffer Pool to carry out asynchronous filtration, such multistage filtering can be accelerated processing speed of data, the data that need in a large number to handle are placed on an exclusive data processing module, roughly selecting data is later carrying out selected to next stage, otherwise when handling the identical data of a large amount of pid values, can occupy the resource of hardware for a long time, cause the filtration of the table_id of back just can not effectively carry out, the efficient of Filter is reduced; Can obtain designing a model thus as Fig. 6:
IIF (Input Interface Function): input interface processing module, carry the code stream of coming to carry out one synchronously from demodulation chip, play the interface chip effect, carry out synchronously according to wherein sync byte, wherein also has data smoothing, adjust, and separate the function of synchronised clock to the chip use of next stage reception data, this module can be as follows for the software parameter that is provided with:
The condition of sync byte detecting, genlocing/losing lock;
The setting that bag is long is defaulted as 188 bytes;
Data Control, it is medium to allow what bytes to pass through to TC;
◆ SE (Search Engine): mainly be to search the table which table in the code stream meets the PID needs of setting, SE also has the DSRAM of self to be used for keeping in the pid value that the table data are used for searching table, generally speaking SE is exactly the table data that find out the PID requirement that meets setting, give SF, filter the section data that need among the table of this specific PID by SF again.
◆ SF (section filter): the effect of this module is exactly the filtration that continues the data that SE filters are more goed deep into one-level, and this is exactly the data processing to the mpeg level.
(3) for making full use of system resource, logical partitioning is a plurality of logic PTI (4 PTI0 ~ PTI3) to hardware PTI, adopt time-sharing multiplex, each logic PTI is defined as handling the equipment of 4 class different data streams again, and the PTI of every kind of inhomogeneous data flow is divided into 4 kinds of different pieces of informations of processing again;
(4) adopt Buffer, Slot, Filter, Signal object come management data to receive and resolve.◆ the Buffer object: be an amount of physical memory, what deposit is the data that filter out from PTI;
◆ the Slot object: the physical location that a PID in the PTI module collects, can regard slot as a hardware corridor, carry out the data route, the corresponding PID of each slot;
◆ Filter object: be a foundation of filtering the PTI of TS stream;
◆ in fact Signal object: signal is exactly a signal whether corresponding buffer of sign has data to pack into.Just can know by its user whether corresponding buffer has data to pack into;
3.PSI/SI tabulation is analysed: the parsing of PSI/SI table is carried out in searching the platform process, and the information such as the PCRPID, the VIDEO PID that obtain respective program, AUDIO PID, code stream type, private data, program names that its objective is program stream decoding when changing platform is used.Analyse in the process in the SI tabulation, this system is to divide two asynchronous process to handle filtering and showing to the parsing of EIT table and the main thought of demonstration:
◆ filter and storage
(1) storage is exactly the foundation of event information database in fact, and this database is with the form tissue of chained list, and the node on this chained list is with data organizational structure's form foundation of front end;
(2) data structure of each node obtains according to the EIT list data structure;
(3) entire database is exactly that form with a chained list exists
◆ resolve and demonstration
(1) resolves this program EPG information and find the site position of this program in the EIT database by the SERVICE_ID and the TS_ID of this program exactly in fact, take out the EPG data of this program, travel through all table and the section of this program, according to the definition of EIT table, parse corresponding event information;
(2) a large amount of event data to parsing, for the event number of controlling demonstration, time etc., so also defined an event chained list, it mainly acts on is in the process of resolving the event data necessarily to be filtered, such as the event number, the filtration of conditions such as time, and the data memory format of this event that standardizes, offer OSD and show to use, only just can be to the correct demonstration of event information with the event data link table that is retrieved as its preparation at the OSD display end.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (4)
1. based on the digital analog integrated implementation method of the LCD TV of DTMB, it is characterized in that: comprise multi-functional decoding chip MST6M68FQ and digital terrestrial channel decoding chip LGS8G52, insert analog catv antenna and digital terrestrial television antenna respectively, television set receives anolog TV signals through after the digital-analog integrated tuner demodulation process, directly exports CVBS video and SIF second accompanying sound intermediate frequency signal; The AV and the y/c signal of this CVBS vision signal and other external inputs directly enter multi-functional decoding chip MST6M68FQ, handle (AFEC) through AFE (analog front end), the 3-D comb filtering, after picture decoding is handled, signal together with YPbPr and VGA passage, be transformed to digital signal through ADC, again with HDMI, digital ground signal TS streaming digital signal after USB multimedia code stream and the demodulation, pass through picture decoding, intelligence is colored to be strengthened, dynamic brightness control, acutance strengthens and digital noise suppresses, after numeral SCALER handles, form the LVDS signal and deliver to 100/120HZ image times frame frequency module, the TCON plate of delivering to liquid crystal display screen through process of frequency multiplication again carries out last image scanning, finishes the reproduction of video image; On the other hand, the second accompanying sound intermediate frequency signal SIF of tuner output also is sent to multi-functional decoding chip MST6M68FQ, it is single-audio MONO or beautiful sound NICAM that system judges signal through demodulation process, and then to the audio signal of the audio signal that demodulates and other external inputs through pre-amplification, pitch curve and five sections balanced adjustment, deliver to audio power amplifier at last and amplify, finish the reproduction of sound.
2. described based on the digital analog integrated implementation method of the LCD TV of DTMB according to claim 1, it is characterized in that: this digital analog integrated implementation method is used the super low-power consumption standby, power button high level, remote control receive head start pwm signal and wake standby MCU process T1 up after the time under the holding state, POWER ON puts height, open main power source power supply and buffer circuit and finish the release of each control signal, main MCU obtains power supply T2 after the time, start other parts of movement, enter start, other invalidating signal in this process; Power button high level under the open state, remote control receive a head shutdown pwm signal, POWER OFF signal and enter reason such as protection owing to system and put high T3 after the time; standby MCU puts POWER ON signal low; close main power source and cut off all and the communication of movement; finish above operation T4 after the time; standby MCU enters park mode automatically, other invalidating signal in this process.
3. described based on the digital analog integrated implementation method of the LCD TV of DTMB according to claim 1, it is characterized in that: it is the image times frame frequency module of core that described 100/120HZ image times frame frequency module adopts with MST6M10L frame-rate conversion processing IC, two-channel digital LVDS code stream after MST6M68FQ handles, deliver to MST6M10L by build-out resistor network Ra and shielded signal wire, pass through motion blur and jitter elimination again, the motion frame-rate conversion, processing such as independent RGB gamma corrected are delivered to liquid crystal display screen TCON plate at last by build-out resistor network Rc and the last screen of four-way LVDS line and are carried out the image scanning reproduction; MST6M10L and MST6M68FQ adopt iic bus to carry out interconnected control in the system.
4. described based on the digital analog integrated implementation method of the LCD TV of DTMB according to claim 1, it is characterized in that: DTMB passage demodulator circuit method of work is that the radiofrequency signal that external antenna receives TV station emission enters tuner through the digital input port of digital analog integrated tuner, after carrying out mixing, frequency reducing and sound table Filtering Processing with local oscillator, output IF differential signal; Again through being input to channel decoder LGS8G52 behind capacitor C 1, C2 coupling and the direct current biasing; In IC, handle → go that time shift interweaves and decoding FEC (LDPC+BCH) then → go to be reduced to TS stream after the data perturbation processing and output to MST6M68FQ through ADC conversion → TDS-OFDM demodulation → digital AGC feedback compensation → carrier wave recovery/channel estimating/recover synchronously → go frequency-domain-interleaving and FFT frame.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102469289A (en) * | 2010-11-02 | 2012-05-23 | 奇景光电股份有限公司 | Method and apparatus of controlling operational status of electronic device |
| CN102957645A (en) * | 2011-08-31 | 2013-03-06 | 北京中电华大电子设计有限责任公司 | Reduced interframe space (RIFS) implementation method and device for 802.11 baseband receiver |
| CN103313003A (en) * | 2013-05-09 | 2013-09-18 | 深圳创维－Rgb电子有限公司 | Standby control circuit and television set |
| CN103702196A (en) * | 2013-12-27 | 2014-04-02 | 乐视致新电子科技（天津）有限公司 | Control method and device for work mode |
| CN104967799A (en) * | 2015-06-30 | 2015-10-07 | 四川长虹电器股份有限公司 | Modular combination television |
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- 2010-01-04 CN CN201010300004A patent/CN101795368A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102469289A (en) * | 2010-11-02 | 2012-05-23 | 奇景光电股份有限公司 | Method and apparatus of controlling operational status of electronic device |
| CN102469289B (en) * | 2010-11-02 | 2014-07-09 | 奇景光电股份有限公司 | Method and apparatus of controlling operational status of electronic device |
| CN102957645A (en) * | 2011-08-31 | 2013-03-06 | 北京中电华大电子设计有限责任公司 | Reduced interframe space (RIFS) implementation method and device for 802.11 baseband receiver |
| CN102957645B (en) * | 2011-08-31 | 2015-04-22 | 北京中电华大电子设计有限责任公司 | Reduced interframe space (RIFS) implementation method and device for 802.11 baseband receiver |
| CN103313003A (en) * | 2013-05-09 | 2013-09-18 | 深圳创维－Rgb电子有限公司 | Standby control circuit and television set |
| CN103313003B (en) * | 2013-05-09 | 2016-10-12 | 深圳创维－Rgb电子有限公司 | Readiness control circuit and television set |
| CN103702196A (en) * | 2013-12-27 | 2014-04-02 | 乐视致新电子科技（天津）有限公司 | Control method and device for work mode |
| CN104967799A (en) * | 2015-06-30 | 2015-10-07 | 四川长虹电器股份有限公司 | Modular combination television |
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Open date: 20100804 |