JP5777532B2 - Audio equipment - Google Patents

Description

  The present invention relates to an audio apparatus that acquires music information related to a music being played from another apparatus by wireless communication.

  Conventionally, an audio data transmission device and an audio output device are connected by wireless communication such as a Bluetooth (registered trademark) system, and the audio of the music corresponding to the audio data received from the audio data transmission device is output in the audio output device. In addition, a configuration is known in which music information such as album names and track names is acquired and displayed by making inquiries using audio waveform data for the first few seconds of audio data (for example, Patent Document 1). reference.).

JP 2008-282348 A

  In the configuration disclosed in Patent Document 1, it is assumed that only music data of music is transmitted from the music data transmitting device. Therefore, in the audio output device on the music data receiving side, the audio at the head portion thereof is assumed. Song information is obtained using waveform data.

  By the way, when it corresponds to AVRCP (Audio Video Remote Control) ver1.4 which is a standard corresponding to the Bluetooth system and further supports a browsing function, it supports music data from the music data transmitting apparatus. It becomes possible to acquire song information. Since the music information acquired in this way may be edited by the user himself, if the user can use it preferentially over the music information that can be acquired in the configuration of Patent Document 1, the user's preference is reflected. It is desirable because it can be displayed. However, such a usage is not possible with the configuration of Patent Document 1.

  On the other hand, even if the browsing function is supported in accordance with the above-mentioned AVRCPver1.4, the capacity of receivable music information is determined for each audio output device, and the music stored in the audio data transmitting device is If the data amount of information is larger than the capacity of the receivable song information, only a part of the stored song information can be received by the audio output device, and a part of the song information is lost.

  The present invention was created in view of the above points, and its purpose is to acquire music information (attached information) from another device (external device) that supplies music data necessary for music playback. An object of the present invention is to provide an audio device capable of complementing song information when the obtained song information is incomplete.

  In order to solve the above-described problems, an audio device of the present invention includes a receiving unit that receives music data necessary for music playback and attached information related to a song by wireless communication from an external device, and a music data received by the receiving unit. Based on the music playback means for playing back the music, the attached information determination means for judging whether or not the attached information received by the receiving means is incomplete, and the attached information judging means determines that the attached information is incomplete And an auxiliary information supplementing means for complementing the incomplete auxiliary information. As a result, the accessory information can be acquired from the external device that supplies the music data necessary for music playback, and when the acquired accessory information is incomplete, it is supplemented to obtain complete accessory information. be able to.

In addition, the above-described auxiliary information requesting means for requesting the external device to transmit the auxiliary information described above is further provided, and the maximum capacity of the auxiliary information that can be received by the receiving means is set. In response to the request from the means, when the receiving means receives the attached information having the data amount equal to the maximum capacity, it is determined that the received attached information is incomplete. For auxiliary information that exceeds the maximum capacity that can be received by the audio device, it is possible to determine that the auxiliary information is incomplete when the auxiliary information having a data amount equal to the maximum capacity is received. It is possible to perform a complementary process on information.

  Further, the attached information determination means described above is a case where there is no attached information held by the external device, and in response to a request from the attached information request means, the external device notifies that the corresponding attached information does not exist. It is desirable to determine that the attached information is incomplete. As a result, even when there is no attached information that should originally exist, it is determined that the attached information is incomplete, and it is possible to perform a complementary process for the incomplete attached information.

  Further, the apparatus further comprises an auxiliary information storage means for storing the auxiliary information corresponding to each of the plurality of music separately from the auxiliary information held by the external device, and the auxiliary information complementing means is incomplete with the auxiliary information by the auxiliary information determining means. When it is determined that the music information is determined, it is desirable to identify the music piece with the attached information, read out the attached information corresponding to the identified music piece from the attached information storage means, and replace it with incomplete attached information. Thereby, even when the maximum capacity is exceeded or the content is missing (when the attached information does not exist), the complete attached information can be obtained with certainty.

  In addition, the attached information described above includes the playback time length (song time) of the corresponding music, and the attached information complementing means identifies the music based on the playback time length and has the same playback time length. It is desirable to read the attached information corresponding to the information from the attached information storage means. Thereby, it is possible to specify the music piece by a simple method and read the attached information.

  Further, the above-described wireless communication is preferably communication using a Bluetooth method. Thereby, it can be determined whether the attached information acquired in accordance with the Bluetooth standard is incomplete, and the attached information can be supplemented as necessary.

1 is a diagram illustrating an overall configuration of an audio system according to an embodiment. It is a figure which shows the structure of a vehicle-mounted audio apparatus. It is a figure which shows the structure of a portable audio apparatus. It is a figure which shows the content of the command and response which are transmitted / received between a vehicle-mounted audio apparatus and a portable audio apparatus. It is a figure which shows ID and the content of the music information used by a command and a response. It is a figure which shows the specific example of a command. It is a figure which shows the specific example of a response. It is a figure which shows the hierarchical structure of AVCTP. It is a flowchart which shows the operation | movement procedure until it acquires music information in a vehicle-mounted audio apparatus, and displays the content.

  Hereinafter, an audio system according to an embodiment to which the present invention is applied will be described with reference to the drawings. FIG. 1 is a diagram illustrating an overall configuration of an audio system according to an embodiment. As shown in FIG. 1, the audio system of this embodiment includes an in-vehicle audio device 100 and a portable audio device 200 that are connected to each other by wireless communication. It is assumed that a Bluetooth system is used as wireless communication for connecting between these devices, and that both devices support AVRCPver1.4 and support the browsing function. As a result, the in-vehicle audio device 100 receives the music data necessary for music playback transmitted from the portable audio device 200 and plays back the music, and the music information as attached information on the music to be played back from the portable audio device 200. Can be acquired and its contents can be displayed. This song information is metadata about the song, and includes a song name, an artist name, an album name, and the like.

  FIG. 2 is a diagram illustrating a configuration of the in-vehicle audio device 100. As shown in FIG. 2, the in-vehicle audio apparatus 100 includes a control unit 110, a communication interface unit (communication I / F) 120, an audio processing unit 130, an amplifier 132, a speaker 134, a display processing unit 140, a display unit 142, and an operation unit. 150 and CDDB (Compact Disc DataBase) 160. As the in-vehicle audio device 100, in addition to the case where it has only a function related to audio reproduction, there may be a case where it has functions such as an in-vehicle navigation device, a radio receiver, and a terrestrial digital broadcast receiver.

  The control unit 110 controls the entire in-vehicle audio device 100. The control unit 110 includes a CPU, a RAM, a ROM, and the like, and performs various operations by executing a predetermined program. Details of the control unit 110 will be described later. The communication interface unit 120 is a communication device (Bluetooth device) that performs wireless connection with the portable audio device 200 by the Bluetooth method to transmit and receive various data. In this embodiment, hardware necessary for wireless communication by the Bluetooth method is realized by the communication interface unit 120, and software is realized by the control unit 110.

  The audio processing unit 130 is for reproducing music data sent from the portable audio device 200, and performs audio decoding processing for each data format and outputs an audio signal. This audio signal is amplified by the amplifier 132 and output from the speaker 134. In practice, audio signals having two or more channels are reproduced and output. In the configuration shown in FIG. 2, one amplifier 132 and one speaker 134 are shown in a simplified manner. .

  The display processing unit 140 is for displaying a screen for selecting a music to be played back and information (song information) about the music being played back. The images created by the control unit 110 are displayed on an LCD or the like. It is displayed on the display unit 142. The operation unit 150 is for receiving various operations by the user, and includes various switches and operation knobs. Note that the operation unit 150 may be configured using a touch panel that is arranged on the screen of the display unit 142, or the operation unit 150 may be configured using a remote control unit or the like.

  The CDDB 160 is a database that stores music information such as artist names, album names, the number of recorded songs, names of each music, and performance time length of music CDs, and includes music information of many music CDs released in the past.

  Next, the control unit 110 will be described. 2, the control unit 110 includes a music data acquisition unit 111, a music playback unit 112, a music information request unit 113, a music information acquisition unit 114, a music information determination unit 115, a music information supplement unit 116, and a music information display. A processing unit 117 is included.

  The music data acquisition unit 111 receives and acquires music data from the portable audio device 200. The music playback unit 112 sends the music data acquired by the music data acquisition unit 111 to the audio processing unit 130, and controls the playback operation of the music. The music information requesting unit 113 requests the portable audio device 200 to transmit music information of the music being played. The music information acquisition unit 114 receives and acquires music information sent from the portable audio device 200 in response to a request from the music information request unit 113.

  The song information determination unit 115 determines whether the song information acquired by the song information acquisition unit 114 is incomplete. In this embodiment, the maximum capacity of song information that can be received for each in-vehicle audio device 100 is set. In the portable audio device 200, when the data amount of song information to be stored exceeds this maximum capacity, this maximum capacity is set. The song information is transmitted according to the capacity. Therefore, when the data amount of the song information acquired by the song information acquisition unit 114 matches the maximum capacity, the data amount of the song information held in the portable audio device 200 is large, and a part of the data is deleted. The recorded music information may have been sent. In consideration of this point, the song information determination unit 115 determines whether or not the song information is incomplete by checking a match / mismatch between the data amount of the song information acquired by the song information acquisition unit 114 and the maximum capacity. If they match, it is determined that the song information is incomplete. In the present embodiment, it is determined that the song information is incomplete even when the portable audio device 200 does not hold the song information.

  The song information complementing unit 116 complements the incomplete song information when the song information determining unit 115 determines that the acquired song information is incomplete. Specifically, the song information complementing unit 116 specifies a song corresponding to the incomplete song information, searches the CDDB 160 for the song information corresponding to the specified song, and reads the read song information incomplete. Replace with song information. The song information display processing unit 117 displays the contents of the song information when the song information acquired by the song information acquisition unit 114 is complete, and the song information complementing unit when the song information is incomplete. An image for displaying the content of the song information after being supplemented by 116 is created. This image is sent to the display processing unit 140 and displayed on the display unit 142.

  The music data acquisition unit 111, the music information acquisition unit 114, and the communication interface 120 described above are used as reception means, the music playback unit 112 and the audio processing unit 130 are used as music playback means, and the music information determination unit 115 is used as additional information determination means. The information complementing unit 116 corresponds to the attached information complementing unit, and the music information requesting unit 113 corresponds to the attached information requesting unit.

  FIG. 3 is a diagram illustrating a configuration of the portable audio device 200. As shown in FIG. 3, the portable audio device 200 includes a control unit 210, a communication interface unit (communication I / F) 220, an audio processing unit 230, an amplifier 232, a speaker 234, a display processing unit 240, a display unit 242, and an operation unit. 250 and a music storage unit 260.

  The control unit 210 controls the entire portable audio device 200. The control unit 210 includes a CPU, a RAM, a ROM, and the like, and performs various operations by executing a predetermined program. The communication interface unit 220 is a communication device that performs wireless connection with the in-vehicle audio device 100 by the Bluetooth method to transmit and receive various data. In this embodiment, hardware necessary for wireless communication by the Bluetooth method is realized by the communication interface unit 220, and software is realized by the control unit 210.

  The audio processing unit 230 is for reproducing the music data stored in the music storage unit 260, and performs audio decoding processing for each data format and outputs an audio signal. This audio signal is amplified by the amplifier 232 and output from the speaker 234 or an earphone (not shown) connected instead of the speaker 234.

  The display processing unit 240 is for selecting a music to be played back and displaying information on the music being played back, and displays these images created by the control unit 210 on a display unit 242 such as an LCD. To do. The operation unit 250 is for accepting various operations by the user, and includes various switches and operation knobs. Note that the operation unit 250 may be configured using a touch panel that is arranged on the screen of the display unit 242.

  The music storage unit 260 stores, for a plurality of music pieces, music data necessary for reproduction of each music piece and music information as attached information regarding the music piece of each music piece. For example, music data is loaded (Ripping) from a CD using a personal computer connected via the communication interface 220 or other communication interface (not shown) (USB interface, wireless LAN interface, etc.), and at the same time, the CDDB provided in the personal computer Or the case where the music information corresponding to music data (song) is taken in from CDDB provided in the server connected via the Internet etc. can be considered. The song information may be edited by the user himself / herself after such a capturing operation or without performing such a capturing operation. For example, it is a case where a song name, artist name, album name, etc. in English are replaced with Japanese. Note that the above-described method of importing music data and music information into the music storage unit 260 is an example, and other methods may be used.

  By the way, the portable audio device 200 has a function as an audio player that operates independently, and inputs music data stored in the music storage unit 260 to the audio processing unit 230 to reproduce or reproduce music. The content of the music information corresponding to the music in the middle can be displayed on the display unit 242 by the display processing unit 240.

  In addition to this, the in-vehicle audio device 100 and the portable audio device 200 have a function of operating in conjunction with each other, and music data and music of each piece of music from the portable audio device 200 in accordance with instructions from the in-vehicle audio device 100. The information can be transmitted to the in-vehicle audio device 100, and the in-vehicle audio device 100 can reproduce the music and display the music information. In the present embodiment, this function is based on AVRCPver1.4, which allows the in-vehicle audio device 100 and the portable audio device 200 to acquire the folder structure of the music folder of the Bluetooth terminal (song information such as folder name and track name). It is realized by supporting the browsing function. Thereby, the music data acquisition unit 111 in the control unit 110 of the in-vehicle audio device 100 can acquire music data by designating music for the portable audio device 200.

  Next, an operation for acquiring music information of a music being played by the in-vehicle audio device 100 will be described. In the present embodiment, the music information is acquired by sending a command requesting transmission of music information from the in-vehicle audio device 100 to the portable audio device 200 and receiving the music information as a response to this command.

  FIG. 4 is a diagram illustrating the contents of commands and responses transmitted / received between the in-vehicle audio device 100 and the portable audio device 200. As illustrated in FIG. 4, a “GetItemAttribute” command is used as a command (Command) transmitted from the in-vehicle audio device 100 to the portable audio device 200. The contents of this command (Command Parameters) include Scope, UID, UID Counters, Number of Attributes, and AttributeID list. Among these, “Number of Attributes” is the number of pieces of music information for which transmission is requested, and “AttributeID list” is an ID list of music information for which transmission is requested.

  In addition, the response contents sent back from the portable audio device 200 to the in-vehicle audio device 100 in response to this command include Status, Number of Attributes, and Attribute Value List. “Status” indicates the presence or absence of an error. “Number of Attributes” is the number of pieces of music information transmitted from the portable audio device 200, but is not necessarily the same as the number of pieces of music information specified by the command, and may be smaller than this. “Attribute Value List” is a list of song information, and includes specific contents of the song information.

  FIG. 5 is a diagram showing the ID of music information used in the command and response and its contents. In FIG. 5, “AttributeID” is an ID (identification number) of song information, “Description” is its content, and “Mandatory / Optional” is whether the item is mandatory (Mandatory) or optional (Optional). Each is shown. Corresponding to each ID, a media name (Title of the media), an artist name (Name of the artist), an album name (Name of the album), for example, a media number indicating a track number in the case of a CD (Number of the media) For example, in the case of a CD, the total number of media indicating the total number of tracks (Genre), the genre (Genre), the playing time in milliseconds (Playing time in millisecond), and the like are included. By using the “GetItemAttribute” command, it is possible to arbitrarily select music information to be acquired from the plurality of music information. These pieces of music information are examples, and may be added or changed as appropriate.

  FIG. 6 is a diagram illustrating a specific example of a command. For example, the ID list of music information that requires transmission includes three IDs indicating a media name (CD title in the case of a CD), an artist name, and a media number. FIG. 7 is a diagram illustrating a specific example of a response. A response sent from the portable audio device 200 to the in-vehicle audio device 100 in response to the command shown in FIG. 6 is shown.

  The examples shown in FIGS. 6 and 7 are for understanding the contents of commands and responses to be transmitted and received, and do not include “music time” which is one piece of music information. However, in the present embodiment, it is necessary to specify a song in order to determine whether or not the acquired song information is incomplete, and the “GetItemAttribute” command is used because “song time” is used to specify the song. It is necessary to include “song time” in the music information specified by. However, the song time may be acquired by issuing another command without including the song time.

  By the way, the above-mentioned commands and responses are used on AVCTP (Audio / Video Control Transport Protocol) which is a communication protocol for transmitting a control message of the AV device. Furthermore, this AVCTP is connected in Bluetooth. This is a protocol defined on L2CAP (Logical Link Control and Adaptive Protocol) which is a communication protocol for setting a data transmission path (logical channel) between devices to be connected (FIG. 8). For this reason, the restrictions defined in L2CAP are also applied to the commands and responses described above. As a result, according to the maximum reception size (MTU) notified to the connection partner by each device defined in L2CAP, only music information of a size that can fit in the MTU of the connection partner can be transmitted, not complete music information. For example, when the portable audio device 200 is notified that the MTU is 50 bytes from the in-vehicle audio device 100, a size (data that does not fit in 50 bytes by a command sent from the in-vehicle audio device 100 to the portable audio device 200) (Amount) of music information is requested, the response actually sent from the portable audio device 200 is up to 50 bytes, and the excess is deleted. Further, according to the Bluetooth standard, the number of times of transmission / reception of music information is limited to one time, and the response cannot be sent in multiple times.

  FIG. 9 is a flowchart showing an operation procedure until the in-vehicle audio device 100 acquires song information and displays the contents. For example, the case where the music information corresponding to this music is acquired during the playback operation by the music playback unit 112 using the music data acquired by the music data acquisition unit 111 will be described.

  The song information request unit 113 sends the “GetItemAttribute” command shown in FIG. 4 to the portable audio device 200 via the communication interface 120 and requests transmission of song information (step 100). When the control unit 210 in the portable audio device 200 receives this command via the communication interface 220, the control unit 210 sends back a response including one or more pieces of music information specified by this command to the in-vehicle audio device 100. The song information acquisition unit 114 receives this response via the communication interface 120 and acquires the song information included in this response (step 102).

  Next, the song information determination unit 115 determines whether or not song information is included in the response (step 104). The “Playing time in millisecond” as the song information shown in FIG. 5 is automatically generated when music data is acquired by ripping or the like, and is used for specifying a song. Therefore, it is assumed that at least the song time is included. Therefore, in step 104, it is determined whether or not song information other than this song time is included.

  If song information is included, an affirmative determination is made in step 104. Next, the song information determination unit 115 determines whether or not the maximum receivable capacity (maximum reception size MTU) matches the data amount of the received song information (response) (step 106). If they do not match (if the received response data amount is smaller than the MTU), a negative determination is made, and then the song information display processing unit 117 displays the contents of the acquired song information (step 108). ).

  Also, when the determination does not include music information in the response and a negative determination is made in the determination in step 104, or when the MTU and the data amount of the response match and an affirmative determination is made in the determination in step 106 Next, the music information complementing unit 116 specifies music corresponding to the incomplete music information, searches and reads the music information corresponding to the specified music from the CDDB 160, and reads the read music information incomplete. Complementary processing for replacement with correct music information is performed (step 110). Generally, the music time of a music read from a CD or the like is set in units of 1/100 second, and the same value as the music time included in the response (the value up to 1/100 seconds is used because it is a unit of 1/1000 second). Can be identified in the CDDB 160, and the above complementing process can be performed by using the song information of the identified song. Thereafter, the music information display processing unit 117 displays the contents of the music information after the supplement (step 108).

  As described above, the in-vehicle audio device 100 according to the present embodiment can acquire music information from the portable audio device 200 as an external device that supplies music data necessary for music reproduction, and the acquired music information is incomplete. If it is, it can be supplemented to complete music information. In particular, when a maximum capacity (maximum reception size (MTU)) of song information that can be received is set, for song information that exceeds this MTU, this song is received when song information having a data amount equal to the MTU is received. It is possible to determine that the information is incomplete, and it is possible to perform a complementing process for the incomplete music information. Further, even in the case where there is no music information that should originally exist, it is determined that the music information is incomplete, and it is possible to perform a complementary process for the incomplete music information.

  Further, by providing the in-vehicle audio device 100 with the CDDB 160, complete music information can be reliably obtained even when the MTU is exceeded or the content is missing (when music information does not exist). Further, by using the song time, the song information can be read from the CDDB 160 by specifying the song by a simple method.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in the above-described embodiment, the music is specified based on the music time and the corresponding music information is read from the CDDB 160. However, other methods may be used to specify the music. For example, the song information acquired from the portable audio device 200 is compared with the song information of each song stored in the CDDB 160, and the song is identified based on the match / mismatch of multiple types of song information (such as artist name and album name). Alternatively, the waveform information of the music data corresponding to the song information acquired from the portable audio device 200 may be extracted to specify a song having the same waveform information (in this case, the waveform of each song is stored in the CDDB 160 or the like). Information also needs to be stored).

  When the response time sent from the portable audio device 200 does not include the song time (when requested by the command but the response time does not include the song time due to the limitation by the MTU), the song information acquisition unit 114 Alternatively, another command for obtaining the song time may be sent to the portable audio device 200, and the song time may be obtained as a response to this command.

  In the above-described embodiment, the in-vehicle audio apparatus 100 includes the CDDB 160. However, the CDDB 160 is provided in a server that can be connected via a network, and the necessary music information is connected to the server as necessary. May be read out. Alternatively, the in-vehicle audio apparatus 100 includes the CDDB 160, and the server or the like that can be connected via the network includes the CDDB 160 ′ including the latest music information, and the CDDB 160 ′ such as a server is used for music information that is not included in the CDDB 160. It may be.

  Further, in the above-described embodiment, when the amount of music information stored in the music storage unit 260 of the portable audio device 200 is large and the response data exceeds the MTU, the excess is deleted. However, depending on the specifications of the portable audio device 200, it may be possible to delete the entire piece of music information partially missing in this way. For example, when the entire artist name is added, the MTU will be exceeded, but when the artist name is deleted, the artist name will fit within the MTU. The data amount of such a response is smaller than the MTU, and a negative determination is made in the determination of step 106 in FIG. It is determined that the supplementary processing is not performed. In consideration of such a case, the song information determination unit 115 lacks at least one of a plurality of types of song information requested to be transmitted by a command (a plurality of song information specified by the AttributeID list in FIG. 4). When the response is acquired by the music information acquisition unit 114, it may be determined that the music information included in the received response is incomplete.

  In the above-described embodiment, the music data acquired by the music data acquisition unit 111 is used to acquire music information corresponding to the music during the playback operation by the music playback unit 112. The present invention can also be applied to the case of acquiring music information corresponding to data.

  In the above-described embodiment, the audio system including the in-vehicle audio device 100 and the portable audio device 200 connected to each other by wireless communication using the Bluetooth method has been described. However, the maximum amount of data that can be received by the in-vehicle audio device 100 is described. As long as the capacity is set, the present invention can also be applied to a configuration in which the capacity is interconnected via a wireless system other than the Bluetooth system.

  As described above, according to the present invention, it is possible to acquire attached information from an external device that supplies music data necessary for music reproduction, and to supplement this when the acquired attached information is incomplete. And complete adjunct information.

DESCRIPTION OF SYMBOLS 100 Car-mounted audio apparatus 110,210 Control part 111 Music data acquisition part 112 Music reproduction part 113 Music information request part 114 Music information acquisition part 115 Music information determination part 116 Music information complement part 117 Music information display process part 120,220 Communication interface part (Communication I / F)
130, 230 Audio processing unit 140, 240 Display processing unit 142, 242 Display unit 150, 250 Operation unit 160 CDDB
200 portable audio device 260 music storage unit

Claims (5)

Receiving means for receiving music data necessary for music playback and attached information about the music by wireless communication from an external device;
Music playback means for playing back music based on the music data received by the receiving means;
Attached information determination means for determining whether the attached information received by the receiving means is incomplete;
Ancillary information complementing means for complementing the incomplete adjunct information when the adjunct information determining means determines that the ancillary information is incomplete;
Attached information requesting means for requesting the external device to transmit the attached information;
A maximum capacity of the attached information that can be received by the receiving means is set,
In the case where the attachment information determination means receives the attachment information having a data amount equal to the maximum capacity in response to the request from the attachment information request means, the reception information is incomplete. determination to the audio device according to claim Rukoto. In claim 1,
The auxiliary information determination means is a case where the auxiliary information held by the external device does not exist, and that the corresponding auxiliary information does not exist in response to the request of the auxiliary information request means from the external device. An audio device characterized by determining that the attached information is incomplete when notified. In claim 1 or 2,
Attached information storing means for storing attached information corresponding to each of a plurality of music pieces separately from the attached information held by the external device,
The auxiliary information complementing means specifies a music piece by the auxiliary information when the auxiliary information determining means determines that the auxiliary information is incomplete, and stores the auxiliary information corresponding to the specified music. An audio device, characterized in that it is read from the means and replaced with incomplete attached information. In claim 3,
The attached information includes the playback time length of the corresponding music,
The audio apparatus according to claim 1, wherein the auxiliary information complementing unit specifies music based on the reproduction time length, and reads auxiliary information corresponding to music having the same reproduction time length from the auxiliary information storage unit. In any one of Claims 1-4,
The audio apparatus according to claim 1, wherein the wireless communication is communication using a Bluetooth system.

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