CN102625072A - TV and audio signal transmission device and method - Google Patents
TV and audio signal transmission device and method Download PDFInfo
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- CN102625072A CN102625072A CN2012100879240A CN201210087924A CN102625072A CN 102625072 A CN102625072 A CN 102625072A CN 2012100879240 A CN2012100879240 A CN 2012100879240A CN 201210087924 A CN201210087924 A CN 201210087924A CN 102625072 A CN102625072 A CN 102625072A
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- 230000005236 sound signal Effects 0.000 title claims abstract description 179
- 230000005540 biological transmission Effects 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000003139 buffering effect Effects 0.000 claims abstract description 42
- 230000008878 coupling Effects 0.000 claims abstract description 42
- 238000010168 coupling process Methods 0.000 claims abstract description 42
- 238000005859 coupling reaction Methods 0.000 claims abstract description 42
- 230000000694 effects Effects 0.000 abstract description 7
- 239000003990 capacitor Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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Abstract
The invention provides a TV and audio signal transmission device and a method. The audio signal transmission device comprises an audio signal output circuit used for outputting audio signal, an S/PDI F interface, an HDMI (High-Definition Multimedia Interface) and an audio coupling buffer circuit, wherein the S/PDIF interface is connected with the audio signal output circuit used for transmitting the audio signal output by the audio signal output circuit to a loudspeaker; the audio coupling buffer circuit is connected between the audio signal output circuit and the HDMI, and is used for coupling and buffering the audio signal output by the audio signal output circuit; and the HDMI is used for transmitting the audio signal processed by the audio coupling buffer circuit to the loudspeaker. The invention has the advantages that distortion during the transmission process of the audio signal is avoided, and the quality and the effect of the audio signal transmitted to the loudspeaker are ensured.
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 (High Definition Multimedia Interface; HDMI) generation of 1.4 standards and extensively utilization; Audio frequency return path in the HDMI1.4 standard can let television set use single cable; Be connected to voice data the processing that amplifies in the household audio and video systems such as A/V receiver or surround sound controller very simple and conveniently; No longer need dispose other S/PDIF (Sony/Philips Digital Interface Format, Sony/Philip digital audio interface agreement) audio frequency connects.
But the television set of using the HDMI1.4 standard can't compatible not contain the loudspeaker of HDMI1.4 standard.For this reason, people pass through on the television set of using the HDMI1.4 standard, to increase independent S/PDIF interface, and with S/PDIF interface and the directly parallel connection of HDMI1.4 interface, and make the television set of HDMI1.4 standard can compatible not contain the loudspeaker of HDMI1.4 standard.But it also brings some problems, and for example audio signal maybe be because of the audio signal output amplitude reduces or the impedance distortion that do not match in transmission course, and then the audio signal transmission mistake maybe can't be discerned the phenomenon of audio signal when causing being connected with many loudspeakers.
Summary of the invention
Main purpose of the present invention provides a kind of audio signal transmission device, is intended to avoid the distortion of audio signal, to guarantee the quality and the effect of audio signal.
A kind of audio signal transmission device that the embodiment of the invention provides comprises the audio signal output circuit, is used for output audio signal, also comprises S/PDIF interface, HDMI interface and audio frequency coupling buffer circuit;
The S/PDIF interface is connected with said audio signal output circuit, is used for audio signal transmission to the loudspeaker that the audio signal output circuit is exported;
Audio frequency coupling buffer circuit is connected between said audio signal output circuit and the said HDMI interface, is used for the audio signal that the audio signal output circuit is exported is coupled and buffered;
The HDMI interface is used for the audio signal transmission of handling through audio frequency coupling buffer circuit to loudspeaker.
Preferably; Said audio frequency coupling buffer circuit comprises operating voltage input, electric capacity, first resistance, second resistance and data buffering processing unit; One end of said electric capacity is connected with said audio signal output circuit; The other end is connected with the buffered data input of said data buffering processing unit; The buffered data input of said data buffering processing unit is connected with said operating voltage input through said first resistance and through said second grounding through resistance, the power end of said data buffering processing unit is connected with said operating voltage input, and the buffered data output of said data buffering processing unit is connected with said HDMI interface.
Preferably, the audio signal transmission device also comprises the buffer control circuit that is used to control said data buffering processing unit operating state, and the control signal output ends of said buffer control circuit is connected with the signal input end of said data buffering processing unit.
Preferably, when said buffer control circuit was exported high level, the audio signal that said data buffering processing unit is exported the audio signal output circuit was carried out buffered.
Preferably, the voltage of said operating voltage input is 3.3V.
The embodiment of the invention also provides a kind of television set, comprises the audio signal transmission device, and said audio signal transmission device comprises the audio signal output circuit, is used for output audio signal, also comprises S/PDIF interface, HDMI interface and audio frequency coupling buffer circuit;
The S/PDIF interface is connected with said audio signal output circuit, is used for audio signal transmission to the loudspeaker that the audio signal output circuit is exported;
Audio frequency coupling buffer circuit is connected between said audio signal output circuit and the said HDMI interface, is used for the audio signal that the audio signal output circuit is exported is coupled and buffered;
The HDMI interface is used for the audio signal transmission of handling through audio frequency coupling buffer circuit to loudspeaker.
The embodiment of the invention also provides a kind of audio signal transmission method, may further comprise the steps:
Judge that loudspeaker is connected with the S/PDIF interface or is connected with the HDMI interface;
When the S/PDIF interface was connected with loudspeaker through cable, audio signal was exported to loudspeaker by the S/PDIF interface; When the HDMI interface was connected with loudspeaker through cable, audio signal was exported to loudspeaker by the HDMI interface after coupling and buffered.
Preferably, said when the HDMI interface is connected with loudspeaker through cable, audio signal is exported to micropkonic concrete steps by the HDMI interface and is after coupling and buffered:
Receive the control signal that buffer control circuit produces;
When said control signal is high level, through the data buffering processing unit audio signal is carried out buffered through the audio signal that coupling is handled, and said audio signal through coupling and buffered is transferred to loudspeaker through said HDMI interface.
Sound intermediate frequency signal transmitting apparatus of the present invention comprises S/PDIF interface and HDMI interface, makes that audio signal transmission device of the present invention both can be to the loudspeaker transmitting audio signal that contains the S/PDIF interface, also can be to the loudspeaker transmitting audio signal that contains the HDMI interface; Through audio frequency coupling buffer circuit is set between audio signal output circuit and HDMI interface; The audio signal of audio signal output circuit output is through the coupling and the buffered of audio frequency coupling buffer circuit; Can be so that output to the stable and impedance matching of micropkonic audio frequency signal amplitude from S/PDIF interface and/or HDMI interface; Distortion when avoiding audio signal transmission to loudspeaker; The phenomenon that the audio signal transmission mistake maybe can't be discerned audio signal appears in the quality of audio signal and effect when assurance transfers to loudspeaker when further avoiding sound intermediate frequency signal transmitting apparatus of the present invention to be connected simultaneously with many loudspeakers.
Description of drawings
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 coupling buffer circuit of the present invention;
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 of audio signal transmission method sound intermediate frequency signal of the present invention by the output of HDMI interface.
The realization of the object of the invention, functional characteristics and advantage will combine embodiment, further specify with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
With reference to Fig. 1, be 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 frequency coupling buffer circuit 3 and HDMI interface 4.Audio signal output circuit 1 is used for output audio signal.S/PDIF interface 2 is connected with audio signal output circuit 1, and the audio signal transmission that is used for audio signal output circuit 1 is exported is to loudspeaker.Audio frequency coupling buffer circuit 3 is connected between audio signal output circuit 1 and the HDMI interface 4, is used for the audio signal that audio signal output circuit 1 is exported is coupled and buffered.HDMI interface 4 is used for the audio signal transmission of handling through audio frequency coupling buffer circuit 3 to loudspeaker.Loudspeaker among the present invention refers to home theaters such as A/V receiver or surround sound controller.
In one embodiment of the present invention, player sound intermediate frequency signal is after audio signal output circuit 1 output, and one the tunnel directly is transferred to and does not contain the HDMI1.4 standard and loudspeaker that have S/PDIF interface 2; Another road be coupled through 3 pairs of audio signals of audio frequency coupling buffer circuit and buffered after be transferred to again and contain the HDMI1.4 standard, promptly have the loudspeaker of HDMI interface 4.So make the audio signal in the player both can transfer to the loudspeaker that contains the S/PDIF interface, can transfer to the loudspeaker that contains the HDMI interface again; In addition; Can be so that output to the stable and impedance matching of micropkonic audio frequency signal amplitude from S/PDIF interface 2 and/or HDMI interface 4; Avoid audio signal to transfer to the distortion the micropkonic process from player; The phenomenon that the audio signal transmission mistake maybe can't be discerned audio signal appears in the quality of audio signal and effect when assurance transfers to loudspeaker when also avoiding audio signal transmission device of the present invention to be connected simultaneously with many loudspeakers.
In another embodiment of the present invention; Player sound intermediate frequency signal is after 1 output of audio signal output circuit; Also can be to not only having S/PDIF interface 2, but also have the loudspeaker transmitting audio signal of HDMI interface 4, and can reach the identical effect of above-mentioned execution mode.
The concrete structure of audio frequency coupling buffer circuit 3 is please with reference to Fig. 2, and Fig. 2 is the structural representation of audio signal transmission device sound intermediate frequency coupling buffer circuit of the present invention.Audio frequency coupling buffer circuit 3 comprises operating voltage input Vcc, capacitor C, first resistance R 1, second resistance R 2 and data buffering processing unit 31; One end of capacitor C is connected with audio signal output circuit 1; The other end of capacitor 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 through first resistance R 1; The buffered data input of data buffering processing unit 31 is through second resistance R, 2 ground connection; The power end of data buffering processing unit 31 is connected with operating voltage input Vcc, and the buffered data output of data buffering processing unit 31 is connected with HDMI interface 4.
The audio signal of audio signal output circuit 1 output is through the buffered data input that after straight coupling, transfers to data buffering processing unit 31 of capacitor C; The buffered data input of data buffering processing unit 31 is connected with operating voltage input Vcc through first resistance R 1, and guaranteeing has sufficiently high level to offer data buffering processing unit 31; The buffered data input of data buffering processing unit 31 makes the impedance matching of audio frequency coupling buffer circuit 3 in the process of transmitting audio signal through second resistance R, 2 ground connection, guarantees that audio signal is transferred in the data buffering processing unit 31 smoothly.
In specific embodiment, the voltage of operating voltage input Vcc is 3.3V.After the separated straight coupling of the audio signal of audio signal output circuit 1 output through capacitor C; Be pulled to 3.3V by first resistance R 1; Carry out impedance matching through 2 pairs of audio signals of second resistance R then; Both guaranteed thus that sufficiently high level offered data buffering processing unit 31, can guarantee again that audio signal was transferred in the data buffering processing unit 31 smoothly.
In conjunction with reference to Fig. 2 and Fig. 3, Fig. 3 is the structural representation of 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 the foregoing description; The control signal output ends of buffer control circuit 5 is connected with the signal input end of data buffering processing unit 31, is used for the operating state of control data buffered unit 31.For example when buffer control circuit 5 output high level, the audio signal that 31 pairs of audio signal output circuit 1 of data buffering processing unit are exported is carried out buffered, and the audio signal after the processing will transfer to loudspeaker through the HDMI interface; When buffer control circuit 5 output low levels, data buffering processing unit 31 does not carry out buffered to the audio signal that audio signal output circuit 1 is exported, and then HDMI interface 4 is not to the loudspeaker transmitting audio signal.Certainly in other embodiments; Also can be arranged to when buffer control circuit 5 output low levels; The audio signal that 31 pairs of audio signal output circuit 1 of data buffering processing unit are exported is carried out buffered, and the audio signal after the processing will transfer to loudspeaker through HDMI interface 4; When buffer control circuit 5 output high level, data buffering processing unit 31 does not carry out buffered to the audio signal that audio signal output circuit 1 is exported, and then HDMI interface 4 is not to the loudspeaker transmitting audio signal.
Audio signal transmission device of the present invention can be used in any player, for example in the electronic equipments such as computer, MP3 and television set.The present invention also provides a kind of television set, and this television set comprises the audio signal transmission device in the foregoing description, specifically can repeat no more at this with reference to Fig. 1, Fig. 2 and Fig. 3.Because this television set comprises the audio signal transmission device in the foregoing description; So it has all advantages of the foregoing description sound intermediate frequency signal transmitting apparatus; Audio signal like television set among the present invention both can transfer to the processing that amplifies in the loudspeaker that contains the S/PDIF interface, also can transfer to the processing that amplifies in the loudspeaker that contains the HDMI interface.Simultaneously can be so that output to the stable and impedance matching of micropkonic audio frequency signal amplitude from the S/PDIF of television set interface and/or HDMI interface; Avoid the distortion in the transmission course of audio signal between television set and loudspeaker; The quality of audio signal and effect when assurance transfers to loudspeaker further avoid occurring when television set is connected with many loudspeakers simultaneously among the present invention the phenomenon that the audio signal transmission mistake maybe can't be discerned audio signal.
The embodiment of the invention also provides a kind of audio signal transmission method, and with reference to Fig. 4, Fig. 4 is the schematic flow sheet of audio signal transmission method of the present invention.This method may further comprise the steps,
Step S01 judges that loudspeaker is connected with the S/PDIF interface or is connected with the HDMI interface;
How to judge that it still is to be connected to the technological means that those skilled in the art use always with the HDMI interface that loudspeaker is connected with the S/PDIF interface, no longer does in detail at this and gives unnecessary details.
Step S02, when the S/PDIF interface was connected with loudspeaker through cable, audio signal was exported to loudspeaker by the S/PDIF interface; When the HDMI interface was connected with loudspeaker through cable, audio signal was exported to loudspeaker by the HDMI interface after coupling and buffered.
When the S/PDIF interface was connected with loudspeaker through cable, audio signal directly was transferred to the loudspeaker with S/PDIF interface through the S/PDIF interface.
When the HDMI interface was connected with loudspeaker through cable, in conjunction with Fig. 5, Fig. 5 was the schematic flow sheet of audio signal transmission method sound intermediate frequency signal of the present invention by the output of HDMI interface.When the HDMI interface was connected with loudspeaker through cable, audio signal was exported to micropkonic step by the HDMI interface and is specifically comprised after coupling and buffered among the above-mentioned steps S02:
Step S021 receives the control signal that buffer control circuit produces;
For example when buffer control circuit output high level, the data buffering processing unit carries out buffered to the audio signal that the audio signal output circuit is exported, and the audio signal after the processing transfers to loudspeaker through the HDMI interface; When the buffer control circuit output low level, the data buffering processing unit does not carry out buffered to the audio signal that the audio signal output circuit is exported, and then the HDMI interface is not to the loudspeaker transmitting audio signal.Certainly in other embodiments; Also can be arranged to when the buffer control circuit output low level; The audio signal that data buffering processing unit team audio signal output circuit is exported is carried out buffered, and the audio signal after the processing transfers to loudspeaker through the HDMI interface; When buffer control circuit output high level, the data buffering processing unit does not carry out buffered to the audio signal that the audio signal output circuit is exported, and then the HDMI interface is not to the loudspeaker transmitting audio signal.
Step S022; When said control signal is high level; Audio signal through coupling is handled is carried out buffered through the data buffering processing unit to audio signal, and said audio signal through coupling and buffered is transferred to loudspeaker through said HDMI interface.
Sound intermediate frequency method for transmitting signals of the present invention is confirmed the passage of audio signal transmission through detecting the interface type that is connected with loudspeaker.When the S/PDIF interface was connected with loudspeaker through cable, audio signal was exported to loudspeaker by the S/PDIF interface; When the HDMI interface was connected with loudspeaker through cable, audio signal was exported to loudspeaker by the HDMI interface after coupling and buffered.Be that audio signal both can transfer to the loudspeaker that contains the S/PDIF interface, can transfer to the loudspeaker that contains the HDMI interface again; Can not reduce and impedance matching simultaneously so that output to micropkonic audio frequency signal amplitude from S/PDIF interface and/or HDMI interface; Avoid the distortion of audio signal in transferring to micropkonic process; The phenomenon that error of transmission maybe can't be discerned does not appear in the quality of audio signal and effect when having guaranteed to transfer to loudspeaker when further avoiding at the same time the loudspeaker transmitting audio signal to many different parameters.
The above is merely the preferred embodiments of the present invention; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (8)
1. an audio signal transmission device comprises the audio signal output circuit, is used for output audio signal, it is characterized in that, also comprises S/PDIF interface, HDMI interface and audio frequency coupling buffer circuit;
The S/PDIF interface is connected with said audio signal output circuit, is used for audio signal transmission to the loudspeaker that the audio signal output circuit is exported;
Audio frequency coupling buffer circuit is connected between said audio signal output circuit and the said HDMI interface, is used for the audio signal that the audio signal output circuit is exported is coupled and buffered;
The HDMI interface is used for the audio signal transmission of handling through audio frequency coupling buffer circuit to loudspeaker.
2. audio signal transmission device according to claim 1; It is characterized in that; Said audio frequency coupling buffer circuit comprises operating voltage input, electric capacity, first resistance, second resistance and data buffering processing unit; One end of said electric capacity is connected with said audio signal output circuit; The other end is connected with the buffered data input of said data buffering processing unit; The buffered data input of said data buffering processing unit is connected with said operating voltage input through said first resistance and through said second grounding through resistance, the power end of said data buffering processing unit is connected with said operating voltage input, and the buffered data output of said data buffering processing unit is connected with said HDMI interface.
3. audio signal transmission device according to claim 2; It is characterized in that; Also comprise the buffer control circuit that is used to control said data buffering processing unit operating state, the control signal output ends of said buffer control circuit is connected with the signal input end of said data buffering processing unit.
4. audio signal transmission device according to claim 3 is characterized in that, when said buffer control circuit was exported high level, the audio signal that said data buffering processing unit is exported the audio signal output circuit was carried out buffered.
5. according to each described audio signal transmission device in the claim 2 to 4, it is characterized in that the voltage of said operating voltage input is 3.3V.
6. a television set is characterized in that, comprises each described audio signal transmission device in the claim 1 to 5.
7. an audio signal transmission method is characterized in that, may further comprise the steps:
Judge that loudspeaker is connected with the S/PDIF interface or is connected with the HDMI interface;
When the S/PDIF interface was connected with loudspeaker through cable, audio signal was exported to loudspeaker by the S/PDIF interface; When the HDMI interface was connected with loudspeaker through cable, audio signal was exported to loudspeaker by the HDMI interface after coupling and buffered.
8. audio signal transmission method according to claim 7 is characterized in that, said when the HDMI interface is connected with loudspeaker through cable, audio signal is exported to micropkonic concrete steps by the HDMI interface and is after coupling and buffered:
Receive the control signal that buffer control circuit produces;
When said control signal is high level, through the data buffering processing unit audio signal is carried out buffered through the audio signal that coupling is handled, and said audio signal through coupling and buffered is transferred to loudspeaker through said HDMI interface.
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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 |
Applications Claiming Priority (1)
| 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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| CN102625072A true CN102625072A (en) | 2012-08-01 |
| CN102625072B CN102625072B (en) | 2016-04-06 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1780493A (en) * | 2004-10-21 | 2006-05-31 | 惠普开发有限公司 | Method and apparatus for configuring the audio outputs of an electronic device |
| CN1989563A (en) * | 2005-02-01 | 2007-06-27 | 松下电器产业株式会社 | Reproduction apparatus, program, and reproduction method |
| CN101399947A (en) * | 2007-09-28 | 2009-04-01 | 索尼株式会社 | Electronic device and control method therein |
| WO2011105770A2 (en) * | 2010-02-23 | 2011-09-01 | Lg Electronics Inc. | A method and an apparatus for transmitting messages in home network system |
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- 2012-03-29 CN CN201210087924.0A patent/CN102625072B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1780493A (en) * | 2004-10-21 | 2006-05-31 | 惠普开发有限公司 | Method and apparatus for configuring the audio outputs of an electronic device |
| CN1989563A (en) * | 2005-02-01 | 2007-06-27 | 松下电器产业株式会社 | Reproduction apparatus, program, and reproduction method |
| CN101399947A (en) * | 2007-09-28 | 2009-04-01 | 索尼株式会社 | Electronic device and control method therein |
| WO2011105770A2 (en) * | 2010-02-23 | 2011-09-01 | Lg Electronics Inc. | A method and an apparatus for transmitting messages in home network system |
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