CN1492676A - Digital acoustic TV set - Google Patents
Digital acoustic TV set Download PDFInfo
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- CN1492676A CN1492676A CNA031404979A CN03140497A CN1492676A CN 1492676 A CN1492676 A CN 1492676A CN A031404979 A CNA031404979 A CN A031404979A CN 03140497 A CN03140497 A CN 03140497A CN 1492676 A CN1492676 A CN 1492676A
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Abstract
A digital sound TV set relates to digital TV, sound and CD technical field composed of receiving satellite digital receiving circuit, AV amplifying circuit for switching audio-visual signals and processing round stereo code signals, a CD playing circuit for playing CD signals a display and a loudspeaker. One can watch digital TV with this programs technology having the function of CD play, stereo, Dolby/DTS round and five sound channels sound effect.
Description
Technical field
The present invention relates to television set, sound equipment and video disc player, in particular can watch Digital Television, have again stereo, 5 sound channels, Doby/DTS around, acoustics and video disc playing function in the digital sound television set of one.
Background technology
Digital Television is " the video picture revolution " again after from the black-and-white TV to the color TV, is the main flow of following TV market development.The most employing of but present Digital Television acquired the mode of set-top box, purchases set-top box device as long as that is to say the CRT television set of spreading, and needn't change television set and just can watch Digital Television; Other one few part is exactly the digital television with European DVB-3 standard production.No matter be to acquire the set-top box television machine, or the digital television of DVB-3 standard is by display, TV signal receives and sound accompaniment effect treatment system three big major parts compositions.In this three big major part, display and TV signal reception processing can be described as the new elaboration of science and technology allows the people acclaim as the acme of perfection, but other function is the audio power amplifier treatment system particularly, though these television sets are after more present information technologies are handled and mixed to technology such as having used beautiful sound, SRS, audio model selection, improvement to tonequality and function increases, but still do not reach basically and have true go back stereo, Doby/DTS around, the acoustics of 5 sound channel tonequality and video disc are played in the function of one.Main cause is that the audio power amplifier treatment system of television set and loud speaker are provided with unreasonable and do not increase the video disc player reason and agree with.
Summary of the invention
The purpose of this invention is to provide a kind of can watch Digital Television have again stereo, 5 sound channels, Doby/DTS around, acoustics and video disc playing function in the digital sound television set of one.
The object of the invention can be achieved through the following technical solutions:
A kind of digital sound television set, described digital sound television set comprises the digital received circuit that is used for receiving digital signals; Be used to switch audio visual signal, and the AV amplifying circuit that the surround sound code signal is handled; The video disc playing circuit and display and the set of speakers composition that are used for play signal.The VT of digital received circuit connects the video signal input terminal of display; The audio signal output end of digital received circuit connects the audio signal input end of AV amplifying circuit; The audio signal output end of AV amplifying circuit connects the audio signal input end of set of speakers; The VT of video disc playing circuit and audio signal output end connect the video signal input terminal of display and the audio signal input end of AV amplifying circuit respectively.The video disc playing circuit that is used for play signal described in the digital sound television set can be DVD player or VCD or HDVD or video request program circuit.Set of speakers in the digital sound television set is by 2 preposition loud speakers, 2 circulating loudspeakers, and 1 subwoofer and 1 place the center loudspeaker of television set inner top or bottom to form.
Technological progress of the present invention is, can watch digital television program, have again stereo, Doby/DTS around, 5 sound channels sound effect and video disc playing function in one.
Description of drawings
Fig. 1 is a functional-block diagram of the present invention;
Fig. 2 is a digital received circuit block diagram of the present invention;
Fig. 3 is a video disc playing circuit block diagram of the present invention;
Fig. 4 is an AV amplifying circuit block diagram of the present invention;
Fig. 5 is a set of speakers block diagram of the present invention.
Specific implementation method
A kind of digital sound television set, described digital sound television set comprises the digital received circuit 1 that is used for receiving digital signals; Be used to switch audio visual signal, and the AV amplifying circuit 2 that the surround sound code signal is handled; The video disc playing circuit 3 that is used for play signal; Display 4 and set of speakers 5 are formed.The VT of digital received circuit 1 connects the video signal input terminal of display 4.The audio signal output end of digital received circuit 1 connects the audio signal input end of AV amplifying circuit 2.The audio signal output end of AV amplifying circuit 2 connects the audio signal input end of set of speakers 5.The VT of video disc playing circuit and audio signal output end connect the video signal input terminal of display 4 and the audio signal input end of AV amplifying circuit 2 respectively.
Concrete digital received circuit as shown in Figure 2, its operation principle is: tuner (T301) receives from 950～2150MHz TV signal of exterior aerial and tuner (LNB) output, carries out the filtering mixing and for the second time after the frequency-conversion processing, becomes baseband I, Q signal.The double A/D transducer converts these two analog signals to 6 bit parallel digital signals respectively again and enters the IC301ODM8511 chip, carries out channel-decoding.The MPEG-2 compressed bit stream that comes out from ODM8511 enters the MPEG-2 demultiplexing, decompression chip IC 105 ODM8211, and the video data stream of ODM8211 output is delivered to video encoder IC118 BT864.BT864 supports NTSC and PAL colour TV standard, receives the luminance and chrominance information digital video frequency flow of 16bit, produces synthetic analog video signal.The audio frequency of output ODM8211 output is delivered to audio D/A converter IC108 PCM1717 according to stream.PCM1717 receives the serial voiceband data signal of 16bit or 18bit and converts stereo simulated audio signal output to.
Concrete video disc playing circuit as shown in Figure 3, its operation principle is: this video disc player has two laser camera lenses, changes when playback of DVD and VCD CD.Laser head is delivered to servo pre-arcing road IC502 with the optical disc information that reads during work, and the laser diode supply current of IC502 output is added on the laser diode of laser head.The audio/video information of reading from the DVD CD is called the RF signal.Because DVD is more much higher than the information density of VCD CD, so the circuit of playback of DVD CD is different with the circuit of playback VCD (or CD) CD.
RF signal after IC502 will amplify is delivered to digital signal processing circuit IC201, carry out processing such as data-signal amplitude limit, EFM (8-14 modulation) demodulation, synchronization signal detection and error correction, the digital signal of output is delivered to data separation circuit IC207, isolate the output of video data and voiceband data signal, deliver to IC304 and carry out the MPEG2 decoding processing.
Video data signal is delivered to the video decode circuit.This circuit carries out decoding processing according to the technical standard of MPEG2.The MPEG1 that the cataloged procedure of MPEG2 and VCD optical disc encoding are used is basic identical, but the handled pixel count of the every two field picture of MPEG2 is much higher, is about 2 times of MPEG1, and therefore, the image definition that the DVD video disc player is reset also is about 2 times of VCD video disc player.
Video data signal reverts to the video signal before the coding after decoding and digital processing, deliver in the digital encoder and encode, and converts analog video signal to through D/A converter then.This analog video signal output has various ways, can be composite video signal (being composite video signal), also can be the S vision signal of brightness, chrominance separation, can also be the component form of YUV.
Voiceband data signal also carries out decoding processing in the MPEG2 decoding circuit, deliver to then among audio frequency PS processor IC902 and the dolby digital decoder IC901 and carry out the AC-3 decoding processing.The sound accompaniment of DVD video disc player is that the multichannel surround sound is recorded on the CD after encoded, and this surround sound coded system is called AC-3 dolby digital surround sound coded system.For the signal that makes the output of DVD video disc player matches with the AV power amplifier, IC901 can directly export the AC-3 digital audio and video signals.AC-3 decoding circuit and the 6 channel power amplifiers of this signal in the AV power amplifier are decomposed into 5.1 sound channels with the sound accompaniment of DVD CD.These 5.1 sound channels are actually 6 loud speakers (2 preposition, 1 mid-, 2 circulating loudspeakers and 1 mega bass loud speaker), because mega bass has only bass component, are not the full range bands, can only calculate 0.1 sound channel, therefore claim 5.1 sound channels.
The DVD video disc player can also link to each other with the dual track sound system.The digital audio and video signals of IC901 output is delivered among the numeral Karaoke treatment circuit IC913 again, handles with the signal of two microphones after the A/D conversion.Here can the signal of microphone be modified tone, stunt such as echo reverberation handles, after the D/A converter converts the stereophony audio signal output to.
Digital servo circuit IC503 is used to handle the error signal of parts such as focusing, tracking, feeding and spindle motor.Go to drive parts such as focusing, tracking coil, feeding motor, spindle motor through drive circuit respectively after treatment.
The control of whole DVD video disc player is undertaken by system's control microprocessor (CPU) IC601.Operation/demonstration microprocessor is used to receive the manual command from operation keys and remote controller, and this instruction transformation is become inner serial code information, delivers to IC601 through data transmission channel, and IC601 controls movement, servo and signal processing circuit respectively again.
Concrete AV amplifying circuit as shown in Figure 4, its operation principle is: behind certain audio visual signal source input A/V commutation circuit IC1 (M52471), select through circuit, main audio channel signal L1, R1 are delivered to dolby pro logic decoding circuit IC5 (M62460), after the Doby decoding, output left and right sound channels signal L3, R3 give volume and tone control circuit IC8 (M62434), output L5, R5 after volume and tone adjusting.IC8 also has SRS (virtual ring around) in dimension sound field processing capacity except that volume, tone control function, can carry out SRS to the two-way main audio channel signal and handle.
Two paths of signals after IC8 handles is respectively after A1, A2 buffering is amplified, sending into BBE handles, this is a kind of acoustic processing technology by the exploitation of Britain BBE audio supplies company, be mainly used to the middle and high tone signal in the audio signal is carried out phase compensation, to improve the result of broadcast of sound, improve the definition of acoustical reproduction.Signal after BBE handles after A3, A4 buffering is amplified, is delivered to left and right main sound channel power amplifier respectively, promotes two preposition loud speakers (LSP, RSP) after power amplification
Under the dolby pro logic pattern, center channels signal C3 through IC5 decoding output delivers to volume control circuit IC10 (M62429), after regulating, give A9 and do the buffering amplification, deliver to the center channels power amplification circuit again, after power amplification, promote center loudspeaker (CSP) sound reproduction.In addition, center channels signal C3 and main audio channel signal L3, R3 also deliver to low pass filter simultaneously, isolate ultralow half signal SB2, after IC10 regulates volume, amplify the output super low sound signal, offer unique upright subwoofer power amplifier or active low color (SBOUT) by the A10 buffering.
The surround sound signal S3 of Doby decoder IC5 output is respectively after A5, A6 buffering is amplified, deliver to volume control circuit IC9 (M62429), making buffering by A7, A8 after regulating amplifies, give power amplifier level LM1876 then, the signal after power amplification promotes left and right circulating loudspeaker (SL, SR) sound reproduction.
When selecting karaoke mode, MIC1, MIC2 two-way microphone signal are earlier respectively after A11, A12 amplify, deliver to volume, tone control circuit IC4 (M62420), after regulating, mixing, amplified by the A13 buffering, the microphone signal MIC1,2 of mixing delivers to IC5 again, output signal D after the time-delay reverberation is handled, and mix with music signal L5, the R5 of main sound channel
Control of construction system such as microcomputer IC3 (PIC16C73A) and fluorescence display driver μ PD16311 and display circuit among the figure.IC3 contains the matrix input of remote control decoding circuit and panel control knob.Circuit by the control program output Serial Control sign indicating number of design in advance, is given each functional circuit after receiving control signal, carry out various functions and mode switch or volume, tone control.IC3 also exports shows signal, delivers to display driver circuit μ PD16311, drives VFD (fluorescence display) by display driver circuit and shows various patterns and operating state.
Set of speakers is by 2 preposition loud speakers as shown in Figure 5, and 2 place the center loudspeaker of television set inner top or bottom to combine around, 1 subwoofer of loud speaker and 1.
Claims (3)
1, a kind of digital sound television set is characterized in that: described digital sound television set comprises the digital received circuit that is used for receiving digital signals; Be used to switch audio visual signal, and the AV amplifying circuit that the surround sound code signal is handled; The video disc playing circuit that is used for play signal, display and set of speakers are formed.The VT of digital received circuit connects the video signal input terminal of display, and the audio signal output end of digital received circuit connects the audio signal input end of AV amplifying circuit; The audio signal output end of AV amplifying circuit connects the audio signal input end of set of speakers; The VT of video disc playing circuit and audio signal output end connect the video signal input terminal of display and the audio signal input end of AV amplifying circuit respectively.
2, digital sound television set according to claim 1 is characterized in that: the described video disc playing circuit that is used for play signal can be DVD player or VCD or HDVD or video request program circuit.
3, digital sound television set according to claim 1 and 2 is characterized in that: set of speakers is by 2 preposition loud speakers, 2 circulating loudspeakers, 1 subwoofer and 1 center loudspeaker that places television set inner top or bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031404979A CN1492676A (en) | 2003-09-15 | 2003-09-15 | Digital acoustic TV set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031404979A CN1492676A (en) | 2003-09-15 | 2003-09-15 | Digital acoustic TV set |
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| Publication Number | Publication Date |
|---|---|
| CN1492676A true CN1492676A (en) | 2004-04-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031404979A Pending CN1492676A (en) | 2003-09-15 | 2003-09-15 | Digital acoustic TV set |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101378602B (en) * | 2007-08-28 | 2013-03-20 | 鸿富锦精密工业（深圳）有限公司 | Display acoustics circuit |
| CN102984575A (en) * | 2012-12-10 | 2013-03-20 | 潍坊海数新媒体技术有限公司 | Integrated digital television and sound machine and control realizing method thereof |
-
2003
- 2003-09-15 CN CNA031404979A patent/CN1492676A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101378602B (en) * | 2007-08-28 | 2013-03-20 | 鸿富锦精密工业（深圳）有限公司 | Display acoustics circuit |
| CN102984575A (en) * | 2012-12-10 | 2013-03-20 | 潍坊海数新媒体技术有限公司 | Integrated digital television and sound machine and control realizing method thereof |
| CN102984575B (en) * | 2012-12-10 | 2015-08-05 | 潍坊海数新媒体技术有限公司 | A kind of Digital Television sound integral machine and control method thereof |
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