CN102625072B - Television set, audio signal transmission device and method - Google Patents
Television set, audio signal transmission device and method Download PDFInfo
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- CN102625072B CN102625072B CN201210087924.0A CN201210087924A CN102625072B CN 102625072 B CN102625072 B CN 102625072B CN 201210087924 A CN201210087924 A CN 201210087924A CN 102625072 B CN102625072 B CN 102625072B
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- 230000005236 sound signal Effects 0.000 title claims abstract description 182
- 230000005540 biological transmission Effects 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000008878 coupling Effects 0.000 claims abstract description 43
- 238000010168 coupling process Methods 0.000 claims abstract description 43
- 238000005859 coupling reaction Methods 0.000 claims abstract description 43
- 230000003139 buffering effect Effects 0.000 claims description 46
- 230000000694 effects Effects 0.000 abstract description 7
- 238000012546 transfer Methods 0.000 description 12
- 238000013404 process transfer Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The invention provides a kind of television set, audio signal transmission device and method, wherein audio signal transmission device comprises audio signal output circuit, for output audio signal, also comprises S/PDIF interface, HDMI and audio coupling buffer circuit; S/PDIF interface, is connected with described audio signal output circuit, for the audio signal transmission that exported by audio signal output circuit to loudspeaker; Audio coupling buffer circuit, be connected between described audio signal output circuit and described HDMI, the audio signal for exporting audio signal output circuit is coupled and buffered; HDMI, for by the audio signal transmission through the process of audio coupling buffer circuit to loudspeaker.Present invention, avoiding the distortion of audio signal in transmitting procedure, ensure that quality and the effect of the audio signal transferred in loudspeaker.
Description
Technical field
The present invention relates to technical field of electronic products, particularly television set, audio signal transmission device and method.
Background technology
Along with HDMI (HighDefinitionMultimediaInterface, HDMI (High Definition Multimedia Interface)) 1.4 standards generation and extensively use, audio return passage in HDMI1.4 standard can allow television set use single cable, voice data is connected in the household audio and video system such as A/V receiver or surround sound controller very simple and conveniently and carries out amplifying process, no longer need to configure other S/PDIF (Sony/PhilipsDigitalInterfaceFormat, Sony/Philip Digital audio interface agreement) audio frequency to connect.
But the television set of application HDMI1.4 standard cannot be compatible not containing the loudspeaker of HDMI1.4 standard.For this reason, people by increasing independent S/PDIF interface on the television set of application HDMI1.4 standard, and by S/PDIF interface and HDMI1.4 interface directly in parallel, and make the television set of HDMI1.4 standard can be compatible containing the loudspeaker of HDMI1.4 standard.But it is also with the problem of serving, such as audio signal may reduce or impedance mismatch and distortion because of audio signal output amplitude in transmitting procedure, and then the phenomenon of audio signal transmission mistake or None-identified audio signal when causing being connected with multiple stage loudspeaker.
Summary of the invention
Main purpose of the present invention is to provide a kind of audio signal transmission device, is intended to the distortion avoiding audio signal, to ensure quality and the effect of audio signal.
A kind of audio signal transmission device that the embodiment of the present invention provides, comprises audio signal output circuit, for output audio signal, also comprises S/PDIF interface, HDMI and audio coupling buffer circuit;
S/PDIF interface, is connected with described audio signal output circuit, for the audio signal transmission that exported by audio signal output circuit to loudspeaker;
Audio coupling buffer circuit, be connected between described audio signal output circuit and described HDMI, the audio signal for exporting audio signal output circuit is coupled and buffered;
HDMI, for by the audio signal transmission through the process of audio coupling buffer circuit to loudspeaker.
Preferably, described audio coupling buffer circuit comprises operating voltage input, electric capacity, first resistance, second resistance and data buffering processing unit, one end of described electric capacity is connected with described audio signal output circuit, the other end is connected with the buffered data input of described data buffering processing unit, the buffered data input of described data buffering processing unit to be connected with described operating voltage input by described first resistance and to pass through described second grounding through resistance, the power end of described data buffering processing unit is connected with described operating voltage input, the buffered data output of described data buffering processing unit is connected with described HDMI.
Preferably, audio signal transmission device also comprises the buffer control circuit for controlling described data buffering processing unit operating state, and the control signal output of described buffer control circuit is connected with the control signal input of described data buffering processing unit.
Preferably, when described buffer control circuit exports high level, described data buffering processing unit carries out buffered to the audio signal that audio signal output circuit exports.
Preferably, the voltage of described operating voltage input is 3.3V.
The embodiment of the present invention additionally provides a kind of television set, comprises audio signal transmission device, and described audio signal transmission device comprises audio signal output circuit, for output audio signal, also comprises S/PDIF interface, HDMI and audio coupling buffer circuit;
S/PDIF interface, is connected with described audio signal output circuit, for the audio signal transmission that exported by audio signal output circuit to loudspeaker;
Audio coupling buffer circuit, be connected between described audio signal output circuit and described HDMI, the audio signal for exporting audio signal output circuit is coupled and buffered;
HDMI, for by the audio signal transmission through the process of audio coupling buffer circuit to loudspeaker.
The embodiment of the present invention additionally provides a kind of audio signal transmission method, comprises the following steps:
Judge that loudspeaker is connected with S/PDIF interface or is connected with HDMI;
When S/PDIF interface is connected with loudspeaker by cable, audio signal exports to loudspeaker by S/PDIF interface; When HDMI is connected with loudspeaker by cable, audio signal exports to loudspeaker by HDMI after coupling and buffered.
Preferably, described when HDMI is connected with loudspeaker by cable, audio signal is exported to micropkonic concrete steps by HDMI and is after coupling and buffered:
Receive the control signal that buffer control circuit produces;
When described control signal is high level, the audio signal through coupling processing carries out buffered by data buffering processing unit to audio signal, and the described audio signal through coupling and buffered is transferred to loudspeaker by described HDMI.
Sound intermediate frequency signal transmitting apparatus of the present invention comprises S/PDIF interface and HDMI, makes audio signal transmission device of the present invention both can to containing the loudspeaker transmission of audio signal of S/PDIF interface, also can to the loudspeaker transmission of audio signal containing HDMI, by arranging audio coupling buffer circuit between audio signal output circuit and HDMI, the audio signal that audio signal output circuit exports is through the coupling of audio coupling buffer circuit and buffered, can make to output to micropkonic audio frequency signal amplitude from S/PDIF interface and/or HDMI to stablize and impedance matching, avoid audio signal transmission to distortion during loudspeaker, the quality of audio signal and effect when ensureing to transfer to loudspeaker, there is the phenomenon of audio signal transmission mistake or None-identified audio signal when avoiding sound intermediate frequency signal transmitting apparatus of the present invention to be connected with multiple stage loudspeaker further simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of audio signal transmission device first embodiment of the present invention;
Fig. 2 is the structural representation of audio signal transmission device sound intermediate frequency of the present invention coupling buffer circuit;
Fig. 3 is the structural representation of audio signal transmission device second embodiment of the present invention;
Fig. 4 is the schematic flow sheet of audio signal transmission method of the present invention;
Fig. 5 is the schematic flow sheet that audio signal transmission method sound intermediate frequency signal of the present invention is exported by HDMI.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
With reference to Fig. 1, it is the structural representation of audio signal transmission device first embodiment of the present invention.This audio signal transmission device comprises audio signal output circuit 1, S/PDIF interface 2, audio coupling buffer circuit 3 and HDMI 4.Audio signal output circuit 1 is for output audio signal.S/PDIF interface 2 is connected with audio signal output circuit 1, for the audio signal transmission that exported by audio signal output circuit 1 to loudspeaker.Audio coupling buffer circuit 3 is connected between audio signal output circuit 1 and HDMI 4, and the audio signal for exporting audio signal output circuit 1 is coupled and buffered.HDMI 4 for the audio signal transmission that will process through audio coupling buffer circuit 3 to loudspeaker.Loudspeaker in the present invention refers to the home theater such as A/V receiver or surround sound controller.
In one embodiment of the present invention, player sound intermediate frequency signal after audio signal output circuit 1 exports, a road be directly transferred to not containing HDMI1.4 standard and there is the loudspeaker of S/PDIF interface 2; Another road is coupled through audio coupling buffer circuit 3 pairs of audio signals and is transferred to after buffered containing HDMI1.4 standard again, namely has the loudspeaker of HDMI 4.So make the audio signal in player both can transfer to loudspeaker containing S/PDIF interface, the loudspeaker containing HDMI can be transferred to again; In addition, can make to output to micropkonic audio frequency signal amplitude from S/PDIF interface 2 and/or HDMI 4 to stablize and impedance matching, audio signal is avoided to transfer to the distortion micropkonic process from player, when ensureing to transfer to loudspeaker, there is the phenomenon of audio signal transmission mistake or None-identified audio signal in the quality of audio signal and effect simultaneously when also avoiding audio signal transmission device of the present invention to be connected with multiple stage loudspeaker.
In another embodiment of the present invention, player sound intermediate frequency signal is after audio signal output circuit 1 exports, also to not only there is S/PDIF interface 2, but also there is the loudspeaker transmission of audio signal of HDMI 4, and the identical effect of above-mentioned execution mode can be reached.
The concrete structure of audio coupling buffer circuit 3 please refer to Fig. 2, and Fig. 2 is the structural representation of audio signal transmission device sound intermediate frequency of the present invention coupling buffer circuit.Audio coupling buffer circuit 3 comprises operating voltage input Vcc, electric capacity C, first resistance R1, second resistance R2 and data buffering processing unit 31, one end of electric capacity C is connected with audio signal output circuit 1, the other end of electric capacity C is connected with the buffered data input of data buffering processing unit 31, the buffered data input of data buffering processing unit 31 is connected with operating voltage input Vcc by the first resistance R1, the buffered data input of data buffering processing unit 31 is by the second resistance R2 ground connection, the power end of data buffering processing unit 31 is connected with operating voltage input Vcc, the buffered data output of data buffering processing unit 31 is connected with HDMI 4.
The audio signal that audio signal output circuit 1 exports is by the buffered data input transferring to data buffering processing unit 31 after straight coupling of electric capacity C, the buffered data input of data buffering processing unit 31 is connected with operating voltage input Vcc by the first resistance R1, ensures sufficiently high level and is supplied to data buffering processing unit 31; The buffered data input of data buffering processing unit 31, by the second resistance R2 ground connection, makes the impedance matching of audio coupling buffer circuit 3 in the process of transmission of audio signal, ensures that audio signal is transferred in data buffering processing unit 31 smoothly.
In a particular embodiment, the voltage of operating voltage input Vcc is 3.3V.The audio signal that audio signal output circuit 1 exports by electric capacity C after straight coupling, 3.3V is pulled to by the first resistance R1, then by the second resistance R2, impedance matching is carried out to audio signal, both ensure that sufficiently high level was supplied to data buffering processing unit 31 thus, can ensure again that audio signal was transferred in data buffering processing unit 31 smoothly.
In conjunction with the structural representation with reference to Fig. 2 and Fig. 3, Fig. 3 being audio signal transmission device second embodiment of the present invention.Audio signal transmission device of the present invention also comprises buffer control circuit 5 on the basis of above-described embodiment, the control signal output of buffer control circuit 5 is connected with the control signal input of data buffering processing unit 31, for the operating state of control data buffered unit 31.Such as when buffer control circuit 5 exports high level, the audio signal that data buffering processing unit 31 pairs of audio signal output circuits 1 export carries out buffered, and the audio signal after process will transfer to loudspeaker by HDMI; When buffer control circuit 5 output low level, data buffering processing unit 31 does not carry out buffered to the audio signal that audio signal output circuit 1 exports, then HDMI 4 is not to loudspeaker transmission of audio signal.Certainly in other embodiments, also can be arranged to when buffer control circuit 5 output low level, the audio signal that data buffering processing unit 31 pairs of audio signal output circuits 1 export carries out buffered, and the audio signal after process will transfer to loudspeaker by HDMI 4; When buffer control circuit 5 exports high level, data buffering processing unit 31 does not carry out buffered to the audio signal that audio signal output circuit 1 exports, then HDMI 4 is not to loudspeaker transmission of audio signal.
Audio signal transmission device of the present invention can be used in any player, such as, in the electronic equipments such as computer, MP3 and television set.Present invention also offers a kind of television set, this television set comprises the audio signal transmission device in above-described embodiment, specifically can refer to Fig. 1, Fig. 2 and Fig. 3, does not repeat them here.The audio signal transmission device in above-described embodiment is comprised due to this television set, so it has all advantages of above-described embodiment sound intermediate frequency signal transmitting apparatus, audio signal as television set in the present invention both can transfer in the loudspeaker containing S/PDIF interface carries out the process that amplifies, and also can transfer in the loudspeaker containing HDMI and carry out the process that amplifies.Can make to output to the stable and impedance matching of micropkonic audio frequency signal amplitude from the S/PDIF interface of television set and/or HDMI simultaneously, avoid the distortion in the transmitting procedure of audio signal between television set and loudspeaker, when ensureing to transfer to loudspeaker, the quality of audio signal and effect, avoid the phenomenon occurring audio signal transmission mistake or None-identified audio signal when television set is connected with multiple stage loudspeaker simultaneously in the present invention further.
The embodiment of the present invention additionally provides a kind of audio signal transmission method, is the schematic flow sheet of audio signal transmission method of the present invention with reference to Fig. 4, Fig. 4.The method comprises the following steps,
Step S01, judges that loudspeaker is connected with S/PDIF interface or is connected with HDMI;
How to judge that loudspeaker is connected with S/PDIF interface or is connected the technological means as those skilled in the art commonly use with HDMI, be no longer described in detail at this.
Step S02, when S/PDIF interface is connected with loudspeaker by cable, audio signal exports to loudspeaker by S/PDIF interface; When HDMI is connected with loudspeaker by cable, audio signal exports to loudspeaker by HDMI after coupling and buffered.
When S/PDIF interface is connected with loudspeaker by cable, audio signal is directly transferred to the loudspeaker with S/PDIF interface by S/PDIF interface.
When HDMI is connected with loudspeaker by cable, composition graphs 5, Fig. 5 is the schematic flow sheet that audio signal transmission method sound intermediate frequency signal of the present invention is exported by HDMI.In above-mentioned steps S02 when HDMI is connected with loudspeaker by cable, audio signal is exported to micropkonic step by HDMI and is specifically comprised after coupling and buffered:
Step S021, receives the control signal that buffer control circuit produces;
Such as when buffer control circuit exports high level, data buffering processing unit carries out buffered to the audio signal that audio signal output circuit exports, and the audio signal after process transfers to loudspeaker by HDMI; When buffer control circuit output low level, data buffering processing unit does not carry out buffered to the audio signal that audio signal output circuit exports, then HDMI is not to loudspeaker transmission of audio signal.Certainly in other embodiments, also can be arranged to when buffer control circuit output low level, the audio signal that data buffering processing unit team audio signal output circuit exports carries out buffered, and the audio signal after process transfers to loudspeaker by HDMI; When buffer control circuit exports high level, data buffering processing unit does not carry out buffered to the audio signal that audio signal output circuit exports, then HDMI is not to loudspeaker transmission of audio signal.
Step S022, when described control signal is high level, audio signal through coupling processing carries out buffered by data buffering processing unit to audio signal, and the described audio signal through coupling and buffered is transferred to loudspeaker by described HDMI.
Sound intermediate frequency method for transmitting signals of the present invention, by detecting the interface type be connected with loudspeaker, determines the passage of audio signal transmission.When S/PDIF interface is connected with loudspeaker by cable, audio signal exports to loudspeaker by S/PDIF interface; When HDMI is connected with loudspeaker by cable, audio signal exports to loudspeaker by HDMI after coupling and buffered.Namely audio signal both can transfer to the loudspeaker containing S/PDIF interface, can transfer to again the loudspeaker containing HDMI; Can make to output to micropkonic audio frequency signal amplitude from S/PDIF interface and/or HDMI not reduce and impedance matching simultaneously, audio signal is avoided to transfer to the distortion in micropkonic process, ensure that quality and the effect of audio signal when transferring to loudspeaker, avoid further at the same time to the phenomenon not occurring error of transmission or None-identified during the loudspeaker transmission of audio signal of multiple stage different parameters.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (7)
1. an audio signal transmission device, comprises audio signal output circuit, for output audio signal, it is characterized in that, also comprises S/PDIF interface, HDMI and audio coupling buffer circuit;
S/PDIF interface, is connected with described audio signal output circuit, for the audio signal transmission that exported by audio signal output circuit to loudspeaker;
Audio coupling buffer circuit, be connected between described audio signal output circuit and described HDMI, the audio signal for exporting audio signal output circuit is coupled and buffered;
HDMI, for by the audio signal transmission through the process of audio coupling buffer circuit to loudspeaker;
Described audio coupling buffer circuit comprises operating voltage input, electric capacity, first resistance, second resistance and data buffering processing unit, one end of described electric capacity is connected with described audio signal output circuit, the other end is connected with the buffered data input of described data buffering processing unit, the buffered data input of described data buffering processing unit to be connected with described operating voltage input by described first resistance and to pass through described second grounding through resistance, the power end of described data buffering processing unit is connected with described operating voltage input, the buffered data output of described data buffering processing unit is connected with described HDMI.
2. audio signal transmission device according to claim 1, it is characterized in that, also comprise the buffer control circuit for controlling described data buffering processing unit operating state, the control signal output of described buffer control circuit is connected with the control signal input of described data buffering processing unit.
3. audio signal transmission device according to claim 2, is characterized in that, when described buffer control circuit exports high level, described data buffering processing unit carries out buffered to the audio signal that audio signal output circuit exports.
4. audio signal transmission device according to any one of claim 1 to 3, is characterized in that, the voltage of described operating voltage input is 3.3V.
5. a television set, is characterized in that, comprises the audio signal transmission device according to any one of Claims 1-4.
6. an audio signal transmission method, is characterized in that, comprises the following steps:
Judge that loudspeaker is connected with S/PDIF interface or is connected with HDMI;
When S/PDIF interface is connected with loudspeaker by cable, the audio signal that audio signal output circuit exports exports to loudspeaker by S/PDIF interface; When HDMI is connected with loudspeaker by cable, the audio signal that audio signal output circuit exports carries out being coupled and exporting to loudspeaker by HDMI after buffered through audio coupling buffer circuit;
Wherein, described audio coupling buffer circuit comprises operating voltage input, electric capacity, first resistance, second resistance and data buffering processing unit, one end of described electric capacity is connected with described audio signal output circuit, the other end is connected with the buffered data input of described data buffering processing unit, the buffered data input of described data buffering processing unit to be connected with described operating voltage input by described first resistance and to pass through described second grounding through resistance, the power end of described data buffering processing unit is connected with described operating voltage input, the buffered data output of described data buffering processing unit is connected with described HDMI.
7. audio signal transmission method according to claim 6, it is characterized in that, described when HDMI is connected with loudspeaker by cable, the audio signal that audio signal output circuit exports is carried out being coupled and exporting to micropkonic concrete steps by HDMI after buffered through audio coupling buffer circuit and is:
Receive the control signal that buffer control circuit produces;
When described control signal is high level, the audio signal of carrying out coupling processing through audio coupling buffer circuit carries out buffered by data buffering processing unit to audio signal, and the described audio signal through coupling and buffered is transferred to loudspeaker by described HDMI.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210087924.0A CN102625072B (en) | 2012-03-29 | 2012-03-29 | Television set, audio signal transmission device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210087924.0A CN102625072B (en) | 2012-03-29 | 2012-03-29 | Television set, audio signal transmission device and method |
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| CN102625072A CN102625072A (en) | 2012-08-01 |
| CN102625072B true CN102625072B (en) | 2016-04-06 |
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| US20060089735A1 (en) * | 2004-10-21 | 2006-04-27 | Atkinson Lee W | Method and apparatus for configuring the audio outputs of an electronic device |
| WO2006082850A1 (en) * | 2005-02-01 | 2006-08-10 | Matsushita Electric Industrial Co., Ltd. | Replay device, program, and replay method |
| JP5003389B2 (en) * | 2007-09-28 | 2012-08-15 | ソニー株式会社 | Electronic device and control method in electronic device |
| EP2540032B1 (en) * | 2010-02-23 | 2020-08-26 | LG Electronics Inc. | A method and an apparatus for transmitting messages in home network system |
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