CN101212583A - Decoding circuit in integrated analog/digital TV receiver - Google Patents
Decoding circuit in integrated analog/digital TV receiver Download PDFInfo
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- CN101212583A CN101212583A CNA200610063614XA CN200610063614A CN101212583A CN 101212583 A CN101212583 A CN 101212583A CN A200610063614X A CNA200610063614X A CN A200610063614XA CN 200610063614 A CN200610063614 A CN 200610063614A CN 101212583 A CN101212583 A CN 101212583A
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Abstract
The invention discloses a decoding circuit in a digital-analog integration television terminal, which comprises an analog video signal decoding circuit leads a switching between the analog television signal modulated through an intermediate frequency and every inputted analog signal in circuits, A/D conversion processing, a decoding processing of brightness and chromaticity separation, a De-interlace processing, Scaler processing and signal format conversion processing. At last the signal is transformed into an LVDS signal; the digital video signal decoding circuit transforms the inputted digital video signal into the LVDS signal through decoding, Scaler processing and a signal format conversion; an audio signal decoding circuit is connected with the digital video signal decoding circuit and carries out a decoding processing to the analog audio signal and the digital audio signal so that the processed audio signal is synchronously output with the outputting video signal of the digital video signal decoding circuit or the analog video signal decode circuit. The decoding circuit in the invention can provide a digital television signal with high quality and has the advantages of simple design and low cost.
Description
Technical field
The present invention relates to integrated analog/digital TV receiver, especially relate in a kind of integrated analog/digital TV receiver, is the decoding circuit of digital TV in high resolution signal with digital signal and the analog signal decoding processing of importing.
Background technology
Integrated analog/digital TV receiver is meant can compatible anolog TV signals and the television terminal of digital television signal.At integrated analog/digital TV receiver, need specific decoding circuit, anolog TV signals or the digital television signal of importing carried out decoding processing, the digital television signal of output consolidation form.But, existing decoding circuit, because design is different, the quality of its decoded output signal also exists than big-difference, especially existing decoding circuit exists design complicated, the shortcoming that cost is high.Therefore, how to design a kind of new decoding circuit, when it can provide high-quality digital television signal for integrated analog/digital TV receiver, also have simplicity of design, advantage that cost is low, become the current very urgent new problem that solves of needing.
Summary of the invention
The objective of the invention is to propose the decoding circuit in a kind of integrated analog/digital TV receiver, think that integrated analog/digital TV receiver provides high-quality digital television signal, and simplify design existing decoding circuit.
For addressing the above problem, the present invention discloses the decoding circuit in a kind of integrated analog/digital TV receiver, and numeral and two kinds of signals of simulation are decoded, and comprising:
The analog video signal decoding circuit, with anolog TV signals behind intermediate frequency demodulation and the decoding processing of each road analog signal switchings, A/D conversion process, brightness and the chrominance separation of input, go that interlacing (De-interlace) is handled, convergent-divergent (Scaler) processing and signal format conversion processing be low-voltage differential (LVDS) signal;
The decoded digital video signal circuit, comprise: the digital television signal that will import television terminal is made the transformat change-over circuit of transformat conversion, and be connected with this transformat change-over circuit, be used for that the output signal of this transformat change-over circuit made the decoded digital video signal module, convergent-divergent (Scaler) processing module of decoding processing and be the LVDS modular converter of low-voltage differential (LVDS) signal the signal format conversion processing;
The audio signal decoding circuit, be connected with described decoded digital video signal circuit, simulated audio signal and digital audio and video signals are carried out decoding processing, make audio signal after the processing and described decoded digital video signal circuit or export synchronously with the outputting video signal of described analog video signal decoding circuit.
More preferably, the integrated integrated circuit (IC) chip that is arranged at of described analog video signal decoding circuit, described decoded digital video signal module and described audio signal decoding circuit.
More preferably, described integrated circuit (IC) chip is a mixed-signal formula integrated circuit (IC) chip (MSD).
More preferably, described analog video signal decoding circuit specifically comprises:
The A/D modular converter, the analog video signal that is used for importing carries out analog-digital conversion and is treated to digital video signal;
The analog video signal decoder module is used for the digital video signal after A/D modular converter conversion is carried out the decoding processing of brightness and chrominance separation;
Go interlacing (De-interlace) processing module, be used for and go interlacing to handle through the decoded signal of analog video signal decoder module, to eliminate interline flicker, to strengthen picture quality;
Convergent-divergent (Scaler) processing module is used for that the signal through going the output of interlacing processing module is carried out image zoom and handles, and makes different input signal formats be converted to same format output and is convenient to the display screen demonstration;
The LVDS modular converter will be converted to low-voltage differential (LVDS) signal through the vision signal that convergent-divergent is handled.
More preferably, the present invention also comprises:
The analog intermediate frequency demodulation module, be electrically connected with described analog video signal decoding circuit and described audio signal decoding circuit respectively, be used for the anolog TV signals of input are carried out demodulation process, the output analog video signal is to described A/D modular converter, and the output simulated audio signal is to described audio signal decoding circuit.
More preferably, described analog intermediate frequency demodulation module is a tuner.
More preferably, described transformat change-over circuit comprises:
The digital medium-frequency signal demodulation module is used for digital medium-frequency signal is made channel demodulation, the output transport stream vision signal;
HDMI signal format modular converter is the vision signal of High Speed I TU-656 form with high-resolution multimedia video (HDMI) conversion of signals.
More preferably, described audio signal decoding circuit comprises:
The analogue audio frequency demodulation module is connected with described analog intermediate frequency demodulation module, to the simulated audio signal demodulation process, makes through the audio signal of demodulation process and the outputting video signal of described analog video signal decoding circuit and exports synchronously;
The digital audio demodulation module, be connected with described decoded digital video signal circuit, digital audio and video signals in the digital television signal of input television terminal is carried out demodulation process, the audio signal after the demodulation and the outputting video signal of described decoded digital video signal circuit are exported synchronously.
More preferably, the present invention also comprises:
The output audio amplifying circuit is connected with described audio signal decoding circuit, and the audio signal of its output is made processing and amplifying.
More preferably, described output audio amplifying circuit comprises:
Pre-amplifying circuit is made processing and amplifying to the amplitude of the audio signal of described audio signal decoding circuit output;
Power amplification circuit is with the output signal rate of doing work processing and amplifying of pre-amplifying circuit.
Compared with prior art, the present invention has following beneficial effect:
1, decoding circuit provided by the invention, compatible anolog TV signals of energy and digital television signal, and, provide high-quality LVDS digital television signal by format conversion and optimization process to the back signal of decoding, be particularly useful for dull and stereotyped liquid crystal type analogue digital integrated television;
2, the present invention adopts the MSD integrated chip to realize most of function of decoding circuit, has simplified the design of decoding circuit, has reduced the cost of decoding circuit.
Description of drawings
Fig. 1 is the structural representation of the decoding circuit in the integrated analog/digital TV receiver of the present invention;
Fig. 2 is a preferred embodiment schematic diagram of the decoding circuit in the integrated analog/digital TV receiver of the present invention.
Embodiment
Please refer to shown in Figure 1ly, be the structural representation of the decoding circuit in the integrated analog/digital TV receiver that the present invention discloses.Decoding circuit of the present invention, can be with existing anolog TV signals and the digital television signal that exists of compatibility, with its decoding processing is especially to be fit to low-voltage differential (LowVoltage Differential Signal, the LVDS) digital television signal that plate digital analog integrated TV shows.
Decoding circuit of the present invention specifically comprises: analog video signal decoding circuit 110, decoded digital video signal circuit 120, audio signal decoding circuit 130, output audio amplifying circuit 140 and analog intermediate frequency demodulation module 150.
Described audio signal decoding circuit 130 is electrically connected described analog intermediate frequency demodulation module 150 and described decoded digital video signal circuit 120 simultaneously; And the audio signal of the output of described audio signal decoding circuit 130 after described output audio amplifying circuit 140 processing and amplifying, with described analog video signal decoding circuit 110 or/and the vision signal synchronous driving of the output of described decoded digital video signal circuit 120 to television terminal voice output element and image-displaying member.
Main is described analog video signal decoding circuit 110, described decoded digital video signal module 122 and described audio signal decoding circuit 130 integrated being arranged among the integrated circuit (IC) chip.More excellent, be integrated in a mixed-signal formula integrated circuit (IC) chip (Mixed-Signal Design, MSD).
Below in conjunction with Fig. 1 each functional circuit of decoding circuit is described in further detail.
Import the analog video signal of described analog video signal decoding circuit 110, be meant existing anolog TV signals, process is the analog video signal after the tuner conversion processing, or is the analog video signal from the input of input interfaces such as AV1-AV3, S terminal.
Described analog video signal decoding circuit 110 specifically comprises:
A/D modular converter 111 is used for the analog video signal of input is carried out the analog-digital conversion processing;
Analog video signal decoder module 112 is used for the digital video signal after A/D modular converter 111 conversion is carried out the decoding processing of brightness and chrominance separation, is reduced into RGB tristimulus signals or YCbCr color difference signal;
Go interlacing (De-interlace) processing module 113, be used for and go interlacing to handle through analog video signal decoder module 112 decoded signals, to eliminate interline flicker, to strengthen picture quality;
Convergent-divergent (Scaler) processing module 114 is used for that the signal through going 113 outputs of interlacing processing module is carried out image zoom and handles, and makes different input signal formats be converted to same format output and is convenient to the display screen demonstration;
LVDS modular converter 115, will be converted to low-voltage differential (LVDS) signal through the vision signal that convergent-divergent is handled is the LVDS signal, with strengthen antijamming capability, reduce to other circuit disturb and and the display screen coupling; Simultaneously, this LVDS signal has the advantage of strong anti-interference performance, is convenient to the transmission of longer distance.
Wherein, through AV1-AV3, and the analog video signal of input terminal such as S terminal input can be directly inputted into described A/D modular converter 111 and handle.
The present invention also comprises analog intermediate frequency demodulation module 150, be electrically connected with described analog video signal decoding circuit 110, the anolog TV signals of input are carried out demodulation process, the output analog video signal is handled output LVDS signal by described analog video signal decoder module 112, described De-interlace processing module 113, described Scaler processing module 114 and described LVDS modular converter 115 again to described A/D modular converter 111.
More preferably, described analog intermediate frequency demodulation module 150 is a tuner, and the anolog TV signals of importing are decomposed into analog video signal and simulated audio signal, and this simulated audio signal is simulation second accompanying sound intermediate frequency signal.
Described decoded digital video signal circuit 120 comprises:
The digital television signal of input television terminal is made the transformat change-over circuit 121 of transformat conversion; Wherein, described transformat change-over circuit 121 specifically comprises:
Digital medium-frequency signal demodulation module 1211 is used for the digital medium-frequency signal that digital radio signal is exported through tuner is carried out channel-decoding, output transport stream (Transport Stream, TS) vision signal;
HDMI signal format modular converter 1212, (High DefinitionMultimedia Interface, HDMI) conversion of signals is the vision signal of High Speed I TU-656 form with the high-resolution multimedia video.
Decoded digital video signal module 122 is connected with described transformat change-over circuit 121, and the stream vision signal of the output of described transformat change-over circuit 121 or the vision signal of High Speed I TU-656 form are made decoding processing;
Convergent-divergent (Scaler) processing module 123 is used for that the signal through 122 outputs of decoded digital video signal module is carried out image zoom and handles, and makes different input signal formats be converted to same format output and is convenient to the display screen demonstration;
LVDS modular converter 124 will be converted to low-voltage differential (LVDS) signal through the vision signal that convergent-divergent is handled.
The output signal of described analog video signal decoding circuit 110 and decoded digital video signal circuit 120 can directly send dull and stereotyped liquid crystal display terminal to.
Moreover described audio signal decoding circuit 130 comprises:
Digital audio demodulation module 131, be connected with described decoded digital video signal circuit 120, digital audio and video signals in the digital television signal of input television terminal is carried out decoding processing, the audio signal after the processing and the outputting video signal of described decoded digital video signal circuit are exported synchronously in same channels;
Analogue audio frequency demodulation module 132, be connected with described analog intermediate frequency demodulation module 150, to make through the audio signal of demodulation process and the outputting video signal of described analog video signal decoding circuit 110 and export synchronously transform isolated simulated audio signal demodulation process by anolog TV signals;
Specifically, when the passage of the digital video signal of the described decoded digital video signal circuit 120 of input or the analog signal channel of importing described analog video signal decoding circuit 110 are changed between TV, AV1-AV3, YCbCr/YpbPr, RGB, HDMI, described one of them sound channel of audio signal decoding circuit control gating is exported audio signal and vision signal synchronously.
Described output audio amplifying circuit 140 is connected with described audio signal decoding circuit 130, comprising:
Pre-amplifying circuit 141 is made processing and amplifying to the amplitude of the audio signal of described audio signal decoding circuit 130 outputs;
Power amplification circuit 142, with the output signal rate of doing work processing and amplifying of pre-amplifying circuit 141, the outputting digital audio signal of this power amplification circuit 142 is by outputs such as earphone, audio amplifiers.
Simultaneously, please refer to shown in Figure 2ly, be a preferable specific embodiment of the present invention.
Wherein, decoding chip 210 adopts the chip of MSD 116L models, it the is integrated functional circuit of described analog video signal decoding circuit 110 shown in Figure 1, described decoded digital video signal module 122 and described audio signal decoding circuit 130.
Decoding chip 210 is according to the channel video signal of input, input audio signal to AV1/S terminal input interface 241, AV3 input interface 242, YCbCr/YpbPr/AV2 input interface 243 and RGB input interface 244 is made hand-off process, and the vision signal of output and audio signal cochannel are exported synchronously.
Wherein, decoding chip 210 output LVDS vision signals can directly send the display module display video signal to; The audio signal process model of its output is that the input model was that the power amplifier 252 of TDA1517 is made the power output processing and amplifying, can directly export earphone, audio amplifier etc. to after the prime amplifier 251 of KA4558 was done the signal amplitude amplification.
To sum up, owing to adopted as above technical scheme, the decoding circuit in the digital-to-analogue one television terminal of the present invention has following beneficial effect:
1, decoding circuit provided by the invention, the compatible anolog TV signals of energy and digital television signal, and pass through To format conversion and the optimization process of the rear signal of decoding, provide high-quality LVDS digital television signal, especially Be applicable to dull and stereotyped liquid crystal type digital-to-analogue one television set;
2, the present invention adopts the MSD integrated chip to realize most of function of decoding circuit, has simplified the decoding electricity The design on road has reduced the cost of decoding circuit.
Claims (10)
1. the decoding circuit in the integrated analog/digital TV receiver is decoded numeral and two kinds of signals of simulation, it is characterized in that, comprising:
The analog video signal decoding circuit, with the input analog signal do A/D conversion process, brightness and chrominance separation decoding processing, go that interlacing (De-interlace) is handled, convergent-divergent (Scaler) is handled and the signal format conversion processing is low-voltage differential (LVDS) signal;
The decoded digital video signal circuit, comprise: the digital television signal that will import television terminal is made the transformat change-over circuit of transformat conversion, and be connected with this transformat change-over circuit, be used for that the output signal of this transformat change-over circuit made the decoded digital video signal module, convergent-divergent (Scaler) processing module of decoding processing and be the LVDS modular converter of low-voltage differential (LVDS) signal the signal format conversion processing;
The audio signal decoding circuit, be connected with the decoded digital video signal circuit, to carry out decoding processing to simulated audio signal and digital audio and video signals, and make audio signal after the processing and described decoded digital video signal circuit or export synchronously with the outputting video signal of described analog video signal decoding circuit.
2. the decoding circuit in the integrated analog/digital TV receiver according to claim 1, it is characterized in that the integrated integrated circuit (IC) chip that is arranged at of described analog video signal decoding circuit, described decoded digital video signal module and described audio signal decoding circuit.
3. the decoding circuit in the integrated analog/digital TV receiver according to claim 2 is characterized in that, described integrated circuit (IC) chip is a mixed-signal formula integrated circuit (IC) chip (MSD).
4. the decoding circuit in the integrated analog/digital TV receiver according to claim 1 is characterized in that, described analog video signal decoding circuit specifically comprises:
The A/D modular converter, the analog video signal that is used for importing carries out analog-digital conversion and is treated to digital video signal;
The analog video signal decoder module is used for the digital video signal after A/D modular converter conversion is carried out the decoding processing of brightness and chrominance separation;
Go interlacing (De-interlace) processing module, be used for and go interlacing to handle through the decoded signal of analog video signal decoder module, to eliminate interline flicker, to strengthen picture quality;
Convergent-divergent (Scaler) processing module is used for that the signal through going the output of interlacing processing module is carried out image zoom and handles, and makes different input signal formats be converted to same format output and is convenient to the display screen demonstration;
The LVDS modular converter will be converted to low-voltage differential (LVDS) signal through the vision signal that convergent-divergent is handled.
5. the decoding circuit in the integrated analog/digital TV receiver according to claim 1 is characterized in that, also comprises:
The analog intermediate frequency demodulation module, be electrically connected with described analog video signal decoding circuit and described audio signal decoding circuit respectively, be used for the anolog TV signals of input are carried out demodulation process, the output analog video signal is to described A/D modular converter, and the output simulated audio signal is to described audio signal decoding circuit.
6. the decoding circuit in the integrated analog/digital TV receiver according to claim 5 is characterized in that, described analog intermediate frequency demodulation module is a tuner.
7. the decoding circuit in the integrated analog/digital TV receiver according to claim 1 is characterized in that, described transformat change-over circuit comprises:
The digital medium-frequency signal demodulation module is used for digital medium-frequency signal is made channel demodulation, the output transport stream vision signal;
HDMI signal format modular converter is the vision signal of High Speed I TU-656 form with high-resolution multimedia video (HDMI) conversion of signals.
8. the decoding circuit in the integrated analog/digital TV receiver according to claim 1 is characterized in that, described audio signal decoding circuit comprises:
The analogue audio frequency demodulation module is connected with described analog intermediate frequency demodulation module, to the simulated audio signal demodulation process, makes through the audio signal of demodulation process and the outputting video signal of described analog video signal decoding circuit and exports synchronously;
The digital audio demodulation module, be connected with described decoded digital video signal circuit, digital audio and video signals in the digital television signal of input television terminal is carried out demodulation process, the audio signal after the demodulation and the outputting video signal of described decoded digital video signal circuit are exported synchronously.
9. according to the decoding circuit in any described integrated analog/digital TV receiver of claim 1-8, it is characterized in that, also comprise:
The output audio amplifying circuit is connected with described audio signal decoding circuit, and the audio signal of its output is made processing and amplifying.
10. the decoding circuit in the integrated analog/digital TV receiver according to claim 9 is characterized in that, described output audio amplifying circuit comprises:
Pre-amplifying circuit is made processing and amplifying to the amplitude of the audio signal of described audio signal decoding circuit output;
Power amplification circuit is with the output signal rate of doing work processing and amplifying of pre-amplifying circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200610063614XA CN101212583B (en) | 2006-12-31 | 2006-12-31 | Decoding circuit in integrated analog/digital TV receiver |
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| CN200610063614XA CN101212583B (en) | 2006-12-31 | 2006-12-31 | Decoding circuit in integrated analog/digital TV receiver |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101547362B (en) * | 2009-05-06 | 2010-11-24 | 天津大学 | Compatible transmission method for wide-gamut digital TV signals |
| CN104486576A (en) * | 2014-12-30 | 2015-04-01 | 南京巨鲨显示科技有限公司 | Conversion system converting full-interface input signals to SDI output signals |
| CN104768048A (en) * | 2014-11-08 | 2015-07-08 | 晶晨半导体(上海)有限公司 | Audio/video conversion device |
| CN105898178A (en) * | 2015-12-08 | 2016-08-24 | 乐视致新电子科技（天津）有限公司 | Signal processing method and signal processor |
| CN109495703A (en) * | 2018-11-09 | 2019-03-19 | 广州长嘉电子有限公司 | A kind of the simulated television playback method and system of plug-in coaxial audio-frequency module |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100265236B1 (en) * | 1997-08-22 | 2000-09-15 | 윤종용 | A tv-set having a tuner combinig use for analog/digital |
| US6091458A (en) * | 1998-01-22 | 2000-07-18 | Samsung Electronics Co., Ltd. | Receiver having analog and digital video modes and receiving method thereof |
| KR100263896B1 (en) * | 1998-06-26 | 2000-08-16 | 윤종용 | Digital/analog broadcasting signal processing unit |
| CN2377779Y (en) * | 1999-06-23 | 2000-05-10 | 厦门华侨电子企业有限公司 | TV set with digital video broadcasting receiving function |
| CN2619443Y (en) * | 2003-06-09 | 2004-06-02 | 深圳市佳创视讯技术有限公司 | Wired multimedia data receiver |
-
2006
- 2006-12-31 CN CN200610063614XA patent/CN101212583B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101547362B (en) * | 2009-05-06 | 2010-11-24 | 天津大学 | Compatible transmission method for wide-gamut digital TV signals |
| CN104768048A (en) * | 2014-11-08 | 2015-07-08 | 晶晨半导体(上海)有限公司 | Audio/video conversion device |
| WO2016070733A1 (en) * | 2014-11-08 | 2016-05-12 | 晶晨半导体(上海)有限公司 | Audio and video conversion device |
| US10009576B2 (en) | 2014-11-08 | 2018-06-26 | Amlogie (Shanghai) Co., Ltd. | Audio and video conversion device |
| CN104486576A (en) * | 2014-12-30 | 2015-04-01 | 南京巨鲨显示科技有限公司 | Conversion system converting full-interface input signals to SDI output signals |
| CN105898178A (en) * | 2015-12-08 | 2016-08-24 | 乐视致新电子科技（天津）有限公司 | Signal processing method and signal processor |
| CN109495703A (en) * | 2018-11-09 | 2019-03-19 | 广州长嘉电子有限公司 | A kind of the simulated television playback method and system of plug-in coaxial audio-frequency module |
| CN109495703B (en) * | 2018-11-09 | 2021-03-23 | 广州长嘉电子有限公司 | Analog television playing method and system of plug-in coaxial audio module |
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