JP4618163B2 - In-vehicle audio system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent information provided during mute from being missed even if output of audio sound of audio data provided from the outside is muted. <P>SOLUTION: When it is discriminated (discriminated as YES in S100) that audio sound is muted, output of audio sound in accordance with sound data input from a radio receiving part 10 is muted, while sound recording of sound data input to the sound recording part 23 from the radio receiving part 10 is started, when it is discriminated (discriminated as YES in S104) that mute of audio sound is released, sound data recorded in a data storage part 22 during mute is time-shift-reproduced and output from an output part 24. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to an in-vehicle audio apparatus.

  Conventionally, in-vehicle audio devices have a mute that is input from the navigation device during voice guidance or voice recognition of the navigation device in order to make it easy to hear the voice guidance of the navigation device or to reduce misrecognition of voice recognition of the navigation device. Some of them mute audio sounds such as CD and MD according to the signal. In such a device, for example, if a mute signal is output during playback of a CD or MD, the audio sound being muted is missed.

To deal with such problems, if a mute signal is output from an external device such as a navigation device or a hands-free device during playback of a CD, MD, or cassette tape, the music playback is paused and the audio sound is muted. When the output of the mute signal is stopped, there is one that resumes playback from the beginning of the paused music (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-320892

  However, the device described in Patent Document 1 has a problem that, for example, when a mute signal is input from a navigation device during reception of a radio broadcast, the content received during mute is missed. That is, if the audio output of the radio broadcast is suddenly muted by the voice guidance of the navigation device while receiving the audio data provided from the outside like a radio broadcast, the broadcast content being muted is missed. There is a problem such as.

  The present invention has been made in view of the above problems, and an object of the present invention is to prevent information provided during mute from being missed even when the output of audio sound of audio data provided from the outside is muted.

To achieve the above object, according to a first aspect of the present invention, there is provided a recording unit for recording audio data input from external audio input means for inputting audio data provided from outside to a storage means, and outputting from a speaker. It is determined that the mute of the audio sound is started by the mute start determining means for determining whether or not to start muting the audio sound, the sound source switching determining means for determining whether or not there is a sound source switching instruction, and the mute start determining means. And when the sound source switching determining means determines that there is no sound source switching instruction , the output unit mutes the output of audio sound from the speaker and the recording unit starts recording of audio data, and outputs from the speaker Mute release determination means for determining whether or not to mute the audio sound to be released If it is determined to cancel the muting of the audio sounds by muting cancel determining unit is that having a, a reproduction control means for outputting the reproduced audio data recorded in the storage means output unit by the recording unit.

  In such a configuration, if it is determined to start muting the audio sound, the recording unit starts recording the audio data input from the external audio input unit to the storage unit, and if it is determined to cancel the mute of the audio sound, Since the recorded audio data is played back and output from the output unit, even if the audio output of the audio data provided from the outside is muted, the information provided during mute should not be missed Can do.

  The second feature of the present invention is that time shift reproduction is performed in which the audio data recorded in the storage means is reproduced simultaneously with the recording of the audio data in the storage means by the recording unit.

  In such a configuration, even if the audio data is reproduced, the audio data input from the external audio input means during recording is recorded in the storage means, so that it is input from the external audio input means during reproduction of the audio data. It is possible not to miss the audio data.

  The third feature of the present invention is that the reproduction speed of the audio data is determined to be faster than usual, and the audio data is reproduced at the determined reproduction speed.

In such a configuration, since the audio data is reproduced at a higher reproduction speed than usual, the audio data provided during mute can be confirmed in a shorter time compared with the case of reproducing at the normal reproduction speed. . The fourth feature of the present invention is that the playback speed of the audio data is determined so that the playback speed increases as the mute time from when the audio sound is muted until when the audio sound is unmuted is longer. . Further, the fifth feature of the present invention is that the sound data recorded in the storage unit by the recording unit is erased when it is determined by the sound source switching determination unit that there is a sound source switching instruction.

  The configuration of the in-vehicle audio device 1 and the navigation device 3 according to an embodiment of the present invention is shown in FIG. As shown in the figure, the in-vehicle audio device 1 includes an audio input device 10 and an audio control unit 20.

  The audio input device 10 includes a radio receiver 11 constituted by an FM / AM tuner, an MD player 12 that reads out an audio signal corresponding to music data recorded on the MD, and audio data corresponding to music data recorded on the CD. A CD player 13 for reading is provided, and audio data is input from each of the sound sources 11 to 13 to the audio control unit 20.

  The audio control unit 20 includes a switching unit 21, a data storage unit 22, a recording unit 23, an output unit 24, and a control unit 25.

  The switching unit 21 switches audio data input to the output unit 24 from the sound sources 11 to 13 of the audio input device 10 in accordance with a signal input from the control unit 25. That is, specific audio data is selected from the sound sources 11 to 13 of the audio input device 10 according to the signal input from the control unit 25, and the selected audio signal is input to the output unit 24. Further, the switching unit 21 inputs the audio data selected according to the signal from the control unit 25 to the recording unit 23.

  The recording unit 23 records audio data input from the audio input device 10 via the switching unit 21 in the data storage unit 22 in accordance with a signal from the control unit 25.

  The output unit 24 causes the speaker 2 to output an audio sound corresponding to the audio data input from the audio input device 10 via the switching unit 21. Further, when a signal instructing mute of the audio sound is input from the control unit 25, the output unit 24 mutes the audio sound corresponding to the audio data input from the audio input device 10, and further, a navigation device described later When voice data for voice guidance is input from the navigation control unit 38 of FIG. 3, an audio sound corresponding to the voice data input from the navigation control unit 38 is output from the speaker 2.

  The data storage unit 22 is configured using a hard disk drive. The data storage unit 22 stores audio data input from the audio input device 10. In addition, the data storage unit 22 stores a table or the like indicating the playback speed of time-shift playback by the output unit 24 according to the mute time from when the audio sound is muted until the audio sound is unmuted. Yes.

  The control unit 25 is configured by a computer including a CPU, a memory, and the like, and the CPU operates according to a program stored in the memory.

  In addition, the control unit 25 of the in-vehicle audio apparatus 1 performs time shift for simultaneously recording the audio data in the data storage unit 22 by the recording unit 23 and reproducing the audio data stored in the data storage unit 22 by the output unit 24. It has a function to play.

  The navigation device 3 includes a position detector 30, a map data input unit 34 for inputting map data for navigation, an operation switch 35, a microphone 36, a display unit 37, and a navigation control unit 38.

  Each of the position detectors 30 includes a well-known GPS receiver 31, gyroscope 32, and vehicle speed sensor 33, and outputs signals detected by these sensors 31 to 33 to the navigation control unit 38.

  The map data input unit 34 inputs map data for navigation stored on a CD or DVD.

  The operation switch 35 includes a switch such as a mechanical switch provided around the display screen of the display unit 37 or a remote controller, a touch switch provided over the display screen of the display unit 37, and the like according to a user's operation of these switches. The received signal is output to the navigation control unit 38. The operation switch 35 includes a voice recognition switch for instructing start and end of voice recognition, a mute switch for instructing start and end of mute, and the like.

  The microphone 36 is provided in the passenger compartment to collect the occupant's voice, and outputs an audio signal corresponding to the occupant's voice to the navigation control unit 38.

  The navigation control unit 38 is configured by a computer including a CPU, a memory, and the like. The CPU operates according to a program stored in the memory.

  The CPU of the navigation control unit 38 calculates a current position based on a signal input from the position detector 30, reads map data from the map data input unit 34, and presents it on a map around the vehicle position. Map display processing for displaying position marks, voice recognition processing for recognizing the voice of a passenger in the vehicle interior collected by the microphone 36, and searching for a guidance route to a destination specified according to the operation of the user operation switch 35 Route guidance processing that performs route guidance according to the guidance route set by the route search processing and route setting processing.

  In the route guidance process, the navigation control unit 38 outputs voice data for voice guidance to the output unit 19 of the in-vehicle audio device 1 when it is positioned a predetermined distance (for example, 300 meters) before a guidance point such as a right-left turn intersection. At the same time, a mute signal is output to the control unit 25 of the in-vehicle audio device 1 and when the output of the voice data for voice guidance is finished, the output of the mute signal is stopped. In addition, the navigation control unit 38 receives the voice of the voice data input from the microphone 36 when a signal instructing the start of voice recognition is input from the operation switch 35 in response to a user's operation of a voice recognition switch (not shown). When the recognition process is started and a mute signal is output to the control unit 25 of the in-vehicle audio device 1 and no voice data is input for a predetermined time or longer, the voice recognition process is terminated and the output of the mute signal is stopped. The navigation control unit 38 outputs a mute signal to the control unit 25 of the in-vehicle audio device 1 when a signal instructing mute is input from the operation switch 35 according to the user's operation of the mute switch. When a signal for instructing the mute release is input from the operation switch 35 in response to the release operation, the output of the mute signal is stopped.

  In this way, the navigation control unit 38 outputs a mute signal during voice guidance in the route guidance process, when voice recognition starts in the voice recognition process, and when the user operates the mute switch.

  Next, with reference to the flowchart shown in FIG. 2, the process of the control part 25 of the vehicle-mounted audio apparatus 1 is demonstrated. When the ignition switch is turned on, the in-vehicle audio device 1 and the navigation device 3 are in an operating state, and the control unit 25 starts the process shown in FIG.

  First, it is determined whether or not to mute the audio sound output from the speaker 2 based on whether or not a mute signal is input from the navigation control unit 38 (S100). When the mute signal is not input from the navigation control unit 38, the determination of S100 is repeated.

  Here, if the vehicle is positioned a predetermined distance before the guidance point and the mute signal is output together with the voice data for voice guidance from the navigation control unit 38, the determination in S100 is YES, and then the output unit 24 The audio sound input from the audio input device 10 via the switching unit 21 is started to be muted, and the audio data input from the audio input device 10 via the switching unit 21 to the recording unit 23 is recorded as data. Recording is performed in the storage unit 22 (S102). Specifically, a signal instructing to start mute of audio data input from the audio input device 10 via the switching unit 21 is output to the output unit 24 and the audio input device 10 to the switching unit 21 is output to the recording unit 23. A signal for instructing recording of audio data input via is output, and the count of the mute time is started. Thereby, voice guidance is output from the speaker 2 together with the muted audio sound.

  Next, it is determined whether or not to cancel the mute of the audio sound output from the speaker 2 based on whether or not the output of the mute signal from the navigation control unit 38 is stopped (S104).

  When the mute signal is output from the navigation control unit 38, the determination in S104 is repeated. If the output of the mute signal from the navigation control unit 38 is stopped, the determination in S104 is YES, and then it is determined whether there is a sound source switching instruction (S106). Specifically, it is determined whether or not there is a sound source switching instruction based on whether or not a signal indicating a sound source switching instruction is input from an operation unit (not shown) according to a user operation.

  If a signal indicating a sound source switching instruction is not input, the determination in S106 is NO, and then a signal for instructing the mute of the audio sound to be released is transmitted to the output unit 24, and the playback speed of time shift playback is determined. (S108). Specifically, the playback speed of time shift playback is determined with reference to a table stored in the data storage unit 22. In this table, for example, the playback speed when the mute time is 5 seconds is 1.1 times the normal playback speed, and the playback speed when the mute time is 10 seconds is 1.5 times the normal playback speed. In addition, the playback speed is shown so that the playback speed increases as the mute time becomes longer, and the control unit 25 refers to this table to determine the playback speed of time-shift playback.

  Next, time shift reproduction is performed (S110). Specifically, the audio data recorded in the data storage unit 22 by the recording unit 23 is reproduced at the reproduction speed of the time shift reproduction determined in S108 and output from the output unit 24.

  Next, it is determined whether or not to end the time shift reproduction based on whether or not the reproduction position matches the recording position by the recording unit 23 (S112). That is, since time shift playback is performed at a playback speed faster than the normal playback speed, it is determined that the time shift playback ends when the playback position catches up with the recording position by the recording unit 23 and the playback position matches the recording position.

  If the playback position does not match the recording position, the process of S110 is continued. If the playback position and the recording position match, the determination in S112 is YES, and the output unit 24 is instructed to switch the sound source to be output from the speaker 2 (S114). Specifically, the time shift reproduction is terminated, and a signal instructing the output unit 24 to output audio sound corresponding to the audio data input from the audio input device 10 via the switching unit 21 is output, and S100. Return to. In response to this signal, the output unit 24 causes the speaker 2 to output an audio sound corresponding to the audio data input from the audio input device 10 via the switching unit 21.

  If a signal indicating a sound source switching instruction is input in the previous determination in S106, the determination in 106 is YES, and the recorded content recorded during mute is deleted (S116), and the process proceeds to S114.

  In the above embodiment, an example is shown in which the vehicle is positioned a predetermined distance before the guidance point, and a mute signal is output from the navigation control unit 38 together with voice data for voice guidance. Similarly, when the navigation control unit 38 starts voice recognition processing in response to the operation of the voice recognition switch and a mute signal is output from the navigation control unit 38, the audio input device 10 is also muted in the recording unit 23. When the recording of the audio data input via the switching unit 21 is started and the output of the mute signal is stopped, the audio data recorded in the data storage unit 22 by the recording unit 23 is time-shifted and reproduced at a predetermined reproduction speed. And output from the output unit 24.

  Similarly, when the mute switch is operated by the user, similarly, the recording unit 23 starts recording audio data input from the audio input device 10 via the switching unit 21 during mute, and outputs a mute signal. Is stopped, the audio data recorded in the data storage unit 22 by the recording unit 23 is time-shifted and reproduced at a predetermined reproduction speed, and output from the output unit 24.

  According to the configuration described above, when it is determined that the audio sound is to be muted (YES in S100), the audio sound output corresponding to the audio data input from the radio receiving unit 11 is muted and the recording unit 23 receives the radio signal. When it is determined to start recording audio data input from the unit 11 and cancel the mute of the audio sound (determined as YES in S104), the audio data recorded in the data storage unit 22 during the mute is reproduced and output. Since the output from the unit 24 is performed, even if the output of the audio sound of the audio data provided from the outside is muted, the information provided during the mute can be prevented from being missed.

  In addition, since the recording unit 23 performs time-shift reproduction that reproduces the audio data recorded in the data storage unit 22 at the same time as the audio data is recorded in the data storage unit 22, the radio reception unit 11 receives the audio data during reproduction. Since the input voice data is recorded in the data storage unit 22, it is possible to prevent the voice data input from the radio reception unit 11 from being missed during the playback of the voice data.

  Also, since the audio data playback speed is determined to be faster than normal (S108), and the audio data is played back at the determined playback speed (S110), the playback speed is shorter than when playing back at the normal playback speed. The audio data provided during mute can be confirmed.

  The correspondence between the configuration of the above embodiment and the configuration of the claims will be described. The radio receiving unit 11 of the audio input device 10 corresponds to an external audio input unit, S100 corresponds to a mute start determination unit, S104 corresponds to the mute release determination unit, the data storage unit 22 corresponds to the storage unit, and S108 corresponds to the reproduction speed determination unit.

  In addition, this invention is not limited to the said embodiment, Based on the meaning of this invention, it can implement with a various form.

  For example, in the above embodiment, the in-vehicle audio device 1 and the navigation device 3 are configured as separate bodies. However, the in-vehicle audio device 1 and the navigation device 3 may be configured integrally.

  In the above-described embodiment, the radio reception unit 11 of the audio input device 10 has been described as the external audio input unit. However, the external audio input unit is not limited to the radio reception unit 11, and for example, a portable audio terminal An external audio input terminal for inputting audio data from an external device such as the above may be provided, and an external device connected to the external audio input terminal may be applied as external audio input means.

  Further, as shown in the above embodiment, not only the audio data input from the radio receiving unit 11 but also the audio data input from the sound sources 11 to 13 of the audio input device 10 switched by the switching unit 21 is data. Recording may be performed by the storage unit 22, and the audio data recorded by the data storage unit 22 may be reproduced and output from the output unit 24 when the mute is released. Further, when the recorded voice data is played back, the voice data may be played back at a higher speed than usual.

  In the above embodiment, the mute signal is input from the navigation device 3 to the in-vehicle audio device 1 at the time of voice guidance or voice recognition of the navigation device 3. The mute signal is not limited to the mute signal. For example, the mute signal may be input to the in-vehicle audio device 1 from the handsfree device that performs the handsfree call during the handsfree call.

  In the above embodiment, the example in which the playback speed of the time shift playback is determined with reference to the table showing the playback speed of the time shift playback according to the mute time in S108 has been described. The playback speed of time shift playback may be calculated and determined so that the playback time becomes a certain time.

  Moreover, although the example using the data storage part 22 comprised using the hard disk drive as a memory | storage means was shown in the said embodiment, you may comprise using a flash memory etc., for example.

  In the above-described embodiment, when the audio data recorded in the data storage unit 22 by the recording unit 23 is reproduced, the example is shown in which the reproduction speed is determined so that the reproduction speed becomes faster as the mute time is longer. The playback speed may be changed depending on the type of the sound sources 11 to 13 of the audio input device 10. For example, the playback speed when the mute time is 5 seconds during CD playback is 1.1 times the normal playback speed, and the playback speed when the mute time is 10 seconds during CD playback is 1.5 times the normal playback speed. The playback speed when the mute time is 5 seconds during radio reception is 1.3 times the normal playback speed, and the playback speed when the mute time is 10 seconds during radio reception is 1. The playback speed may be changed depending on the type of sound source, such as seven times.

  In the above embodiment, the audio input device 10 is configured by the radio receiver 10, the MD player 12, and the CD player. However, the present invention is not limited to these sound sources.

It is a figure which shows the structure of the vehicle-mounted audio apparatus and navigation apparatus which concern on one Embodiment of this invention. It is a flowchart which shows the process of the control part of a vehicle-mounted audio apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Car-mounted audio apparatus, 2 ... Speaker, 3 ... Navigation apparatus,
30 ... Audio input device, 11 ... Radio receiver, 12 ... MD player,
13 ... CD player, 20 ... audio control unit, 21 ... switching unit, 22 ... data storage unit,
23 ... Recording unit, 24 ... Output unit, 25 ... Control unit, 30 ... Position detector,
31 ... GPS receiver, 32 ... Gyroscope, 33 ... Vehicle speed sensor,
34 ... Map data input unit, 35 ... Operation switch, 36 ... Microphone, 37 ... Display unit,
38 ... Navigation control unit.

Claims (5)

An external voice input means for inputting voice data provided from the outside;
An output unit for outputting an audio sound corresponding to the audio data input from the external audio input means from a speaker;
A recording unit for recording voice data input from the external voice input unit in a storage unit;
Mute start determination means for determining whether to start mute of the audio sound to be output from the speaker;
When the mute start determining means determines to start muting the audio sound, the mute start is caused to cause the output unit to mute the output of the audio sound from the speaker and the recording unit to start recording the audio data. Means,
Mute release determination means for determining whether to cancel mute of the audio sound output from the speaker;
Sound source switching determination means for determining whether there is a sound source switching instruction;
The audio data recorded in the storage unit by the recording unit when it is determined by the mute release determining unit that the mute of the audio sound is to be released and the sound source switching determining unit determines that there is no sound source switching instruction And a reproduction control means for reproducing the signal and outputting it from the output unit.   2. The reproduction control unit according to claim 1, wherein the reproduction control unit performs time-shift reproduction for reproducing the audio data recorded in the storage unit simultaneously with recording of the audio data in the storage unit by the recording unit. The vehicle-mounted audio apparatus of description. A playback speed determining means for determining the playback speed of the audio data to a speed faster than normal;
The in-vehicle audio apparatus according to claim 1, wherein the reproduction control unit reproduces the audio data at the reproduction speed determined by the reproduction speed determination unit and outputs the audio data from the output unit.   The playback speed determining means determines the playback speed of the audio data so that the playback speed becomes faster as the mute time from when the audio sound is muted to when the audio sound is unmuted is longer. The in-vehicle audio apparatus according to any one of claims 1 to 3. 5. The audio data recorded in the storage unit by the recording unit is deleted when the sound source switching determination unit determines that the sound source switching instruction is given. 6. The vehicle-mounted audio apparatus described in 1.

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