CN101958956A - Vehicle-mounted electronic equipment and reproduction method thereof - Google Patents
Vehicle-mounted electronic equipment and reproduction method thereof Download PDFInfo
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- CN101958956A CN101958956A CN200910152101XA CN200910152101A CN101958956A CN 101958956 A CN101958956 A CN 101958956A CN 200910152101X A CN200910152101X A CN 200910152101XA CN 200910152101 A CN200910152101 A CN 200910152101A CN 101958956 A CN101958956 A CN 101958956A
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Abstract
The invention relates to vehicle-mounted electronic equipment and a reproduction method thereof. The vehicle-mounted electronic equipment comprises a broadcast receiving unit, a recording medium and a loudspeaker, wherein in the mode of broadcast reception, audio signals from the broadcast receiving unit are outputted by the sound of the loudspeaker; in the mode of recording medium reproduction, audio signals from a medium reproducing unit are outputted by the sound of the loudspeaker, and the loudspeaker can be connected with a portable telephone so that when the portable telephone calls in, the loudspeaker outputs the calling number of the portable telephone. The vehicle-mounted electronic equipment also comprises a mixing unit and a control part, wherein the calling signals and the audio signals from the broadcast receiving unit and the medium reproducing unit are input into the mixing unit to mix the calling signals with the audio signals from the broadcast receiving unit or the medium reproducing unit and output to the loudspeaker; and when the calling signals are inputted to the mixing unit, the control part controls the mixing amount of the calling signals to be variable relative to the mixing amount of the audio signals from the broadcast receiving unit or the medium reproducing unit according to the current mode.
Description
Technical field
The present invention relates to a kind of vehicle-mounted electronic device and reproducting method thereof.
Background technology
In recent years, development along with vehicle-mounted electronic device (vehicle-mounted machine) technology, the vehicle-mounted electronic device of (Blue Tooth) function that occurred having bluetooth, thereby pass through Bluetooth communication, vehicle-mounted machine is connected with pocket telephone, and when this pocket telephone has incoming call, can export its incoming call by the loud speaker of vehicle-mounted electronic device (vehicle-mounted machine) side.Such vehicle-mounted electronic device, when detecting the incoming telephone signal of expression the other side incoming call in the process of the music data of user in broadcast listening or broadcast recording medium, content (music data etc.) in can irrespectively interrupting listening to the signal source in listening to, and automatically switch to power supply, output incoming sound (incoming telephone signal).Therefore, causing the content in listening to is under the situation of important informations such as transport information, weather information and earthquake information, and the sound that unconditionally interrupts broadcasting during because of incoming call makes the user miss the problem of these important informations.More convenient, the more high performance vehicle-mounted electronic device that this situation is impelled people to develop can to address this is that.
For example, portable set in TOHKEMY 2006-067381 and control method thereof, the content in determining whether interrupting playing according to current state (whether being recording state).
Though this technology can have been alleviated the problems referred to above to a certain extent,, cause the time point of the above-mentioned important information of user's uppick to lag behind because of can only select to export a side sound at synchronization; And, cause the user to leak and listen an above-mentioned ringtone or an important information because of not carrying out the adjustment of size that ringtone or each are listened to the output volume of content according to each relative importance of listening to content and ringtone.
Summary of the invention
The present invention makes in view of the above problems, and its purpose is to provide a kind of variable vehicle-mounted electronic device and reproducting method thereof of volume that ringtone is mixed with sound in listening to and can make ringtone according to listen mode and the importance of listening to content.
To achieve these goals, vehicle-mounted electronic device of the present invention, comprise the media reproducing unit that receive the broadcast reception unit of broadcasting, recording medium is reproduced and will be from the loud speaker of the audio signal output of above-mentioned broadcast reception unit or above-mentioned media reproducing unit; When the broadcast reception pattern, by the audio signal of above-mentioned loud speaker output from above-mentioned broadcast reception unit, when the recording medium reproducing pattern, by the audio signal of above-mentioned loud speaker output from above-mentioned media reproducing unit, and can connect pocket telephone, when this pocket telephone has incoming call, export its incoming telephone signal by above-mentioned loud speaker, above-mentioned vehicle-mounted electronic device is characterised in that, also comprise: synthesis unit, audio signal and above-mentioned incoming telephone signal from above-mentioned broadcast reception unit or above-mentioned media reproducing unit are transfused to, with above-mentioned incoming telephone signal with synthesize from the audio signal of above-mentioned broadcast reception unit or above-mentioned media reproducing unit, and export to above-mentioned loud speaker; And control part, when above-mentioned incoming telephone signal is input in the above-mentioned synthesis unit, corresponding to being above-mentioned broadcast reception pattern or aforementioned recording medium reproduction mode, the combined amount that makes above-mentioned incoming telephone signal is variable with respect to the combined amount from the audio signal of above-mentioned broadcast reception unit or above-mentioned media reproducing unit.
When above-mentioned incoming telephone signal was input in the above-mentioned synthesis unit, above-mentioned control part was under the situation of above-mentioned broadcast reception pattern, and the combined amount that makes above-mentioned incoming call number is than lacking when the above-mentioned media units reproduction mode.
When above-mentioned incoming telephone signal is input in the above-mentioned synthesis unit, above-mentioned control part is only receiving under the situation of broadcasting of assigned frequency in above-mentioned broadcast reception pattern and above-mentioned broadcast reception unit, and the combined amount that makes above-mentioned incoming telephone signal is than lacking when the above-mentioned media units reproduction mode.
The afore mentioned rules frequency is at least one broadcasting frequency in transport information, weather information and the earthquake information.
Above-mentioned control part in the elapsed time corresponding to the moment that is input to above-mentioned synthesis unit from above-mentioned incoming telephone signal begins, increases the combined amount of above-mentioned incoming telephone signal gradually.
Under the situation of above-mentioned broadcast reception pattern and aforementioned recording medium reproduction mode, above-mentioned combined amount all can be set by the user.
A kind of reproducting method of vehicle-mounted electronic device comprises: the step that receives broadcasting or recording medium is reproduced; And when the broadcast reception pattern, audio signal when receiving broadcasting by loud speaker output, when the recording medium reproducing pattern, audio signal when recording medium being reproduced by above-mentioned loud speaker output, and when the pocket telephone that is connected with above-mentioned vehicle-mounted electronic device has incoming call, export the step of its incoming telephone signal by above-mentioned loud speaker, the reproducting method of above-mentioned vehicle-mounted electronic device is characterised in that, also comprise: synthesis step, import above-mentioned incoming telephone signal, and when audio signal during above-mentioned reception broadcasting or above-mentioned audio signal when recording medium is reproduced, audio signal during with above-mentioned incoming telephone signal and above-mentioned reception broadcasting or above-mentioned audio signal when recording medium is reproduced are synthesized, and export to above-mentioned loud speaker; And controlled step, when having imported above-mentioned incoming telephone signal, corresponding to being above-mentioned broadcast reception pattern or aforementioned recording medium reproduction mode, audio signal or the combined amount of above-mentioned audio signal when recording medium reproduced of the combined amount that makes above-mentioned incoming telephone signal during with respect to above-mentioned reception broadcasting is variable.
According to vehicle-mounted electronic device of the present invention and reproducting method thereof, can be during incoming call according in progress signal source and the importance of content in listening to mix voice signal and incoming telephone signal and output in listening to, avoid thus because of unconditionally switching to power supply to miss the situation of some important informations from the signal source of playing.
Description of drawings
Fig. 1 is the structure chart of vehicle-mounted electronic device of the present invention.
Fig. 2 is the flow chart of the action when coming morbid sound according to signal source.
Fig. 3 is the flow chart of the action when coming morbid sound according to the importance of listening to content.
Embodiment
Below, utilize description of drawings vehicle-mounted electronic device of the present invention and reproducting method thereof.
Fig. 1 is the structure chart of vehicle-mounted electronic device of the present invention.
As shown in Figure 1, pocket telephone is via communications such as bluetooth (Blue Tooth) communications, is connected on the vehicle-mounted electronic device body 1 and constitutes vehicle-mounted electronic device of the present invention (car phone Handless system).
Vehicle-mounted electronic device body 1 comprises bluetooth module 101, broadcast reception unit 104, media reproducing unit 102, control part 105, memory cell 103, audio process 106, AMP (Amplifier: amplifier) 107 and loud speaker 108 etc.
Bluetooth module 101 carries out Bluetooth communication with pocket telephone, when this pocket telephone receives incoming telephone signal, incoming telephone signal is input to audio process 106.
Broadcast reception unit (tuner) 104 by receiving broadcast signals such as antennas, and outputs to audio process 106 with broadcast singal (audio signal).
Safe digital card) etc. media reproducing unit 102, for example (Secure Digital Memory Card: the data in the recording medium are reproduced to DVD equipment, hard disk drive, USB and SD card.
Audio process 106, to handling from the audio signal of broadcast reception unit 104 or media reproducing unit 102, be the broadcast reception pattern for example at present mode, during promptly from broadcast reception unit 104 receiving broadcast signals, the audio signal (broadcast singal) that broadcast reception unit 104 is received by volume characteristic adjustment part carries out exporting to AMP107 after the Audio Processing of loudness (Loudness), volume, high pitch (Treble) and bass (Bass) etc.Be the recording medium reproducing pattern at present mode, when promptly reproducing data in the recording mediums, its audio signal carried out exporting to AMP107 after the processing identical with the broadcast singal of broadcast reception pattern by media reproducing unit 102.
In addition, this audio process 106 contains synthesis unit, will from the incoming telephone signal (ringtone) of the incoming call of the expression pocket telephone of bluetooth module 101 with mix from the audio signal of broadcast reception unit 104 or from the audio signal of media reproducing unit 102.Volume in the time of will carrying out this mixing here,, incoming telephone signal is called the combined amount of incoming telephone signal.For example, incoming telephone signal and the volume that with volume is 50dB is that the audio signal in the listening to of 60dB is mixed, and then the combined amount of incoming telephone signal is 50dB, and the combined amount of the audio signal in listening to is 60dB.
In addition, audio process 106 also contains the level of sound volume adjustment part (loop is adjusted in gain) that the volume value of the incoming telephone signal of portable portable telephone is adjusted.
AMP107 exports to loud speaker 108 after amplifying to audio signal.
More than, for example understand the formation of the vehicle-mounted electronic device of embodiments of the present invention.But the invention is not restricted to this, can change as required.
Below, explanation has the action of the vehicle-mounted electronic device of above-mentioned formation with reference to Fig. 2 and Fig. 3.
Fig. 2 is the flow chart of the action when coming morbid sound according to signal source.
At first, check periodically by bluetooth module 101 whether pocket telephone receives the signal (step S101) from the other side, when the incoming telephone signal that does not detect from the other side, (in step S104, not) returns step S101.When the incoming telephone signal that detects from the other side, (in step S104, being), the kind in judgment signal source judges that promptly present mode still is recording medium reproducing pattern (step S102) for the broadcast reception pattern.
Signal source for the signal source that can reset, be that present mode is under the situation of recording medium reproducing pattern (among the step S102, "Yes"), control part 105 extracts the mixing ratio 1 of regulation from memory cell 103, and make the level of sound volume adjustment part according to volume and this mixing ratio 1 in listening to, adjust the volume value of incoming telephone signal, thereby obtain the combined amount 1 of incoming telephone signal.Synthesis unit is with combined amount 1, with incoming telephone signal with undertaken by volume characteristic adjustment part after a series of Audio Processing, mix and export to AMP107 from the audio signal of media reproducing unit 102, and after amplifying by AMP107 by loud speaker 108 outputs (step S105,103).Therefore in this case, but because the content repeat playing in the recording medium, be preferably mixing ratio 1 is set at, make the volume of the volume (combined amount 1) of incoming telephone signal greater than the audio signal in listening to.Certainly, as long as can hear clearly or distinguish that ringtone, mixing ratio 1 can be set by the user is arbitrary value.
Be the signal source of not dropping in signal source, be that present mode is under the situation of broadcast reception pattern (among the step S102, "No"), control part 105 extracts the mixing ratio 2 of regulation from memory cell 103, and make the level of sound volume adjustment part according to volume and this mixing ratio 2 in listening to, adjust the volume value of incoming telephone signal, thereby obtain the combined amount 2 of incoming telephone signal.Synthesis unit is with combined amount 2, with incoming telephone signal with undertaken by volume characteristic adjustment part after a series of Audio Processing, mix and export to AMP107 from the audio signal of broadcast reception unit 104, and after amplifying by AMP107 by loud speaker 108 outputs (step S106,107).In this case, because broadcasting can not repeat to listen to, therefore wish that the volume of ringtone is smaller relatively.For this reason, preferably mixing ratio 2 is set at, the volume that makes ringtone is less than the volume in listening to, and be preferably mixing ratio 2 is set at littler than mixing ratio 1, so that the volume (combined amount 1) of the volume (combined amount 2) of the ringtone of this moment incoming call during for the signal source that can reset less than signal source, thus make ringtone to broadcasting to listen to the influence that brings relatively little.
Then, whether user's decision accepts this incoming call.Accepted under the situation of this incoming call (among the step S108 the user, "Yes"), control part 105 remove in the synthesis units, incoming telephone signal and from the mixing of the audio signal of media reproducing unit 102 or broadcast reception unit 104, content during interruption is listened to, thus switch to call mode (step S109).Then, judge by control part 105 whether conversation finishes.Under being judged as the still unclosed situation of conversation (among the step S110, "No"), repeat to judge whether conversation finishes.Under being judged as the situation that conversation finished (among the step S110, "Yes"), return the state (step S111) before the incoming call, end process.
Under the user does not accept to send a telegram here situation about promptly having hung up (among the step S108, "No"), be controlled to be by control part 105, directly return the state before the incoming call and continue to listen to content (step S111) in listening to originally and end process.
Whether according to present embodiment, when detecting incoming telephone signal, the volume of suitably regulating ringtone according to signal source is the combined amount of incoming telephone signal, thereby make the user judge and receive calls not delaying current situation about listening to.
Fig. 3 is the flow chart of the action when coming morbid sound according to the importance of listening to content.At first, with the same among Fig. 2, be the signal source of not dropping in signal source, be that present mode is under the situation of broadcast reception pattern (among the step S102 of Fig. 2, not), control part 105 makes the level of sound volume adjustment according to volume in listening to and the mixing ratio 2 in the memory cell 5, adjust the volume value of incoming telephone signal and obtain the combined amount 2 of incoming telephone signal, and with combined amount 2, with incoming telephone signal with mix from the audio signal of broadcast reception unit 104 and export (step S201～S202).
Then, judge according to listening to channel whether the content in listening to is important informations (step S203) such as transport information, weather information and earthquake information by control part 105.Control part 105 under being judged as the situation that content in listening to is above-mentioned important information (in step S203, "Yes"), from memory cell 103, extract the mixing ratio 3 of regulation, and make the level of sound volume adjustment part according to volume and this mixing ratio 3 in listening to, adjust the volume value of incoming telephone signal, thereby obtain the combined amount 3 of incoming telephone signal.Synthesis unit is with combined amount 3, with incoming telephone signal with undertaken by volume characteristic adjustment part after a series of Audio Processing, mix and export to AMP107 from the audio signal of broadcast reception unit 104, and after amplifying by AMP107 by loud speaker 108 outputs (step S106,107).In this case, because the content during broadcasting can not repeat to listen to and listen to is an important information, therefore in order not allow the user miss these important informations, mixing ratio 3 is set at littler than mixing ratio 2, so that the volume of ringtone further reduces, the combined amount 3 that just makes incoming telephone signal is listened to influence that important information bring thereby further reduce ringtone to the user less than combined amount 2.
At this moment, control part 105 judges whether the broadcast of important information finishes.(in step S206, "No") returns step S205 under the unclosed situation of the broadcast that is judged as important information, continues the combined amount of incoming telephone signal is remained on combined amount 3, and repeats to judge whether the broadcast of important information finishes.Under the situation that the broadcast that is judged as important information has finished (in step S206, "Yes"), control part 105 extracts mixing ratio 2 from memory cell 103 once more, make the level of sound volume adjustment part according to this mixing ratio 2, the combined amount of incoming telephone signal is adjusted into combined amount 2, synthesis unit is mixed the incoming telephone signal of combined amount 2 with the audio signal in listening to and exports (step S207).
On the other hand, in step S203, under being judged as the situation that content in listening to is not an important information (in step S203, "No"), continue incoming telephone signal is mixed with the audio signal in listening to and to export (step S207) with combined amount 2.
Then, whether accept this incoming call by user's decision.Accepted under the situation of this incoming call (among the step S208 the user, "Yes"), by control part 105 remove in mixed cell, incoming telephone signal and from the mixing of the audio signal of media reproducing unit 102 or broadcast reception unit 104, content during interruption is listened to, thus switch to call mode (step S209).Then judge by control part 105 whether conversation finishes.Under being judged as the still unclosed situation of conversation (among the step S210, "No"), repeat to judge whether conversation finishes.Under being judged as the situation that conversation finished (among the step S210, "Yes"), return the state (step S211) before the incoming call, end process.
Under the user does not accept to send a telegram here situation about promptly having hung up (among the step S208, "No"), be controlled to be by control part 105, directly return the state before the incoming call and continue to listen to content (step S211) in listening to originally and end process.
According to present embodiment, when detecting incoming telephone signal, according to signal source and the importance of the content in listening to, suitably regulate the volume of incoming call, thereby make the user judge and whether receive calls not delaying the situation of listening to current important information.
In the above-described embodiment, after obtaining the combined amount of ringtone, its volume is fixed, but be not limited thereto, also can be controlled to be by control part 105, the combined amount that makes incoming telephone signal is along with the time increases gradually, promptly, play institute's elapsed time in the mixed cell along with incoming telephone signal is input to, the volume of ringtone increases gradually, is frightening user's situation thereby prevent to sound suddenly because of ringtone.
In addition, the combined amount 1～3 of incoming telephone signal can be in above-mentioned execution mode according to mixing ratio 1～3 and the volume of the audio signal in listening to obtain, also can be directly by user's manual adjustments.
And, in the above-described embodiment, under the certain situation of the volume of the audio signal in listening to, changed the combined amount of incoming telephone signal according to different patterns, but be not limited thereto, the volume of the audio signal in also can listening to by adjustment relatively changes the combined amount of incoming telephone signal.
Claims (7)
1. a vehicle-mounted electronic device comprises, the media reproducing unit that receive the broadcast reception unit of broadcasting, recording medium is reproduced and will be from the loud speaker of the audio signal output of above-mentioned broadcast reception unit or above-mentioned media reproducing unit;
When the broadcast reception pattern, by the audio signal of above-mentioned loud speaker output from above-mentioned broadcast reception unit, when the recording medium reproducing pattern, by the audio signal of above-mentioned loud speaker output from above-mentioned media reproducing unit, and can connect pocket telephone, when this pocket telephone has incoming call, export its incoming telephone signal by above-mentioned loud speaker
Above-mentioned vehicle-mounted electronic device is characterised in that, also comprises:
Synthesis unit, audio signal and above-mentioned incoming telephone signal from above-mentioned broadcast reception unit or above-mentioned media reproducing unit are transfused to, with above-mentioned incoming telephone signal with synthesize from the audio signal of above-mentioned broadcast reception unit or above-mentioned media reproducing unit, and export to above-mentioned loud speaker; And
Control part, when above-mentioned incoming telephone signal is input in the above-mentioned synthesis unit, corresponding to being above-mentioned broadcast reception pattern or aforementioned recording medium reproduction mode, the combined amount that makes above-mentioned incoming telephone signal is variable with respect to the combined amount from the audio signal of above-mentioned broadcast reception unit or above-mentioned media reproducing unit.
2. vehicle-mounted electronic device as claimed in claim 1 is characterized in that,
When above-mentioned incoming telephone signal was input in the above-mentioned synthesis unit, above-mentioned control part was under the situation of above-mentioned broadcast reception pattern, and the combined amount that makes above-mentioned incoming call number is than lacking when the above-mentioned media units reproduction mode.
3. vehicle-mounted electronic device as claimed in claim 2 is characterized in that,
When above-mentioned incoming telephone signal is input in the above-mentioned synthesis unit, above-mentioned control part is only receiving under the situation of broadcasting of assigned frequency in above-mentioned broadcast reception pattern and above-mentioned broadcast reception unit, and the combined amount that makes above-mentioned incoming telephone signal is than lacking when the above-mentioned media units reproduction mode.
4. vehicle-mounted electronic device as claimed in claim 3 is characterized in that,
The afore mentioned rules frequency is at least one broadcasting frequency in transport information, weather information and the earthquake information.
5. vehicle-mounted electronic device as claimed in claim 1 is characterized in that,
Above-mentioned control part in the elapsed time corresponding to the moment that is input to above-mentioned synthesis unit from above-mentioned incoming telephone signal begins, increases the combined amount of above-mentioned incoming telephone signal gradually.
6. vehicle-mounted electronic device as claimed in claim 1 is characterized in that,
Under the situation of above-mentioned broadcast reception pattern and aforementioned recording medium reproduction mode, above-mentioned combined amount all can be set by the user.
7. the reproducting method of a vehicle-mounted electronic device,
Reception is broadcasted or recording medium is reproduced, when the broadcast reception pattern, audio signal when receiving broadcasting by loud speaker output, when the recording medium reproducing pattern, audio signal when recording medium being reproduced by above-mentioned loud speaker output, and when the pocket telephone that is connected with above-mentioned vehicle-mounted electronic device has incoming call, export its incoming telephone signal by above-mentioned loud speaker
The reproducting method of above-mentioned vehicle-mounted electronic device is characterised in that, comprising:
Synthesis step, when the audio signal of having imported above-mentioned incoming telephone signal and above-mentioned reception when broadcasting or above-mentioned audio signal when recording medium is reproduced, audio signal during with above-mentioned incoming telephone signal and above-mentioned reception broadcasting or above-mentioned audio signal when recording medium is reproduced are synthesized, and export to above-mentioned loud speaker; And
Controlled step, when having imported above-mentioned incoming telephone signal, corresponding to being above-mentioned broadcast reception pattern or aforementioned recording medium reproduction mode, audio signal or the combined amount of above-mentioned audio signal when recording medium reproduced of the combined amount that makes above-mentioned incoming telephone signal during with respect to above-mentioned reception broadcasting is variable.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910152101XA CN101958956A (en) | 2009-07-14 | 2009-07-14 | Vehicle-mounted electronic equipment and reproduction method thereof |
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| CN200910152101XA CN101958956A (en) | 2009-07-14 | 2009-07-14 | Vehicle-mounted electronic equipment and reproduction method thereof |
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| CN101958956A true CN101958956A (en) | 2011-01-26 |
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| CN200910152101XA Pending CN101958956A (en) | 2009-07-14 | 2009-07-14 | Vehicle-mounted electronic equipment and reproduction method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102723972A (en) * | 2012-06-28 | 2012-10-10 | 惠州市德赛西威汽车电子有限公司 | Vehicle-mounted information service system based on Bluetooth and external communication method thereof |
| CN107295455A (en) * | 2016-03-31 | 2017-10-24 | 宇龙计算机通信科技(深圳)有限公司 | The application process and terminal device of a kind of short-distance wireless communication |
| CN110545503A (en) * | 2018-05-29 | 2019-12-06 | 雅马哈株式会社 | Signal transmission circuit and signal transmission method |
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| CN1351794A (en) * | 1999-04-19 | 2002-05-29 | 三洋电机株式会社 | Portable telephone set |
| US20080170703A1 (en) * | 2007-01-16 | 2008-07-17 | Matthew Zivney | User selectable audio mixing |
| CN101278544A (en) * | 2005-10-05 | 2008-10-01 | 索尼爱立信移动通讯股份有限公司 | Method of combining audio signals in a wireless communication device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1351794A (en) * | 1999-04-19 | 2002-05-29 | 三洋电机株式会社 | Portable telephone set |
| CN101278544A (en) * | 2005-10-05 | 2008-10-01 | 索尼爱立信移动通讯股份有限公司 | Method of combining audio signals in a wireless communication device |
| US20080170703A1 (en) * | 2007-01-16 | 2008-07-17 | Matthew Zivney | User selectable audio mixing |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102723972A (en) * | 2012-06-28 | 2012-10-10 | 惠州市德赛西威汽车电子有限公司 | Vehicle-mounted information service system based on Bluetooth and external communication method thereof |
| CN107295455A (en) * | 2016-03-31 | 2017-10-24 | 宇龙计算机通信科技(深圳)有限公司 | The application process and terminal device of a kind of short-distance wireless communication |
| CN110545503A (en) * | 2018-05-29 | 2019-12-06 | 雅马哈株式会社 | Signal transmission circuit and signal transmission method |
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Application publication date: 20110126 |