JP4660913B2 - Communication device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention Communication device In particular, for example, it was possible to interrupt the sound from the outside, for example Communication device About.
[0002]
[Prior art]
In recent years, with the widespread use of headphone stereos, it has become possible to listen to radio broadcasts and music while traveling in a vehicle or on foot.
[0003]
[Problems to be solved by the invention]
By the way, when using a headphone stereo, it is difficult to hear the sound from the outside, so there was a risk that someone would not notice even if someone called out and missed the in-car broadcast.
[0004]
Headphone stereos installed in specific locations, such as in airplanes and bullet trains, are preset so that the guidance broadcast is interrupted, and the user listens to music or radio broadcasts with the headphone stereo. Never miss a guide broadcast.
[0005]
However, such interruptions are possible only for the headphone stereo prepared in advance in the vehicle, and this is the case when a general user uses his / her own headphone stereo. It was not possible to realize such a function.
[0006]
The present invention has been made in view of such a situation, and even when listening to music or radio broadcasting with a headphone stereo in an arbitrary place, it is possible to easily interrupt a wide range of external sounds. Is to be able to.
[0007]
[Means for Solving the Problems]
The communication apparatus of the present invention includes a communication unit, a control unit that controls the communication unit, a reproduction unit that reproduces content data stored in a storage medium, and an output unit that outputs the content data reproduced by the reproduction unit. In the communication apparatus comprising: A packet including ID information assigned to the device and information indicating the function of the device is exchanged with an external device. The communication means communicated Said After establishing a control link between the external device and the communication device, and after establishing the control link between the external device and the communication device, When a connection request is received from the external device, For the external device To allow reception of audio signals Send a signal , Receive from the external device instead of the content data reproduced by the reproduction means Said An audio signal is output to the output means.
[0009]
The communication means includes Bluetooth (Registered trademark) Data transmission / reception can be performed using wireless communication conforming to the above.
[0010]
The communication device is a wireless voice of the external device. output It can be a device.
[0011]
The external device includes switching means for switching whether to transmit a signal including the audio signal to the communication device, and the control unit is configured to switch the control link and audio between the external device and the communication device. After establishing a communication link, and establishing the control link and the voice communication link between the external device and the communication device, the external device To allow reception of audio signals When the signal is transmitted, when the switching from the non-transmission to the transmission of the signal including the audio signal is input to the switching unit, the audio signal transmitted from the external device is output to the output unit. Can be made.
[0012]
The external device is controlled by the control means. Receive from the external device Said Audio signal Said When the output means is outputting, the switching means From transmission to non-transmission of signals including the audio signal When switching is entered, Said voice Cancel communication link Can.
[0013]
In the present invention, A packet including ID information assigned to the device and information indicating the function of the device is exchanged with an external device, After a control link is established between the external device and the communication device, and after the control link is established between the external device and the communication device, When a connection request is received from the external device, For the external device To allow reception of audio signals Signal is sent , Receive from the external device instead of the content data reproduced by the reproduction means Said An audio signal is output to the output means.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a diagram showing a configuration of an embodiment of an information processing system to which the present invention is applied. This system includes a communication unit 1 and a CD (Compact Disk) player 2. The user of the communication unit 1 presses the microphone button 12 and inputs the sound from the microphone 11 when transmitting the input sound to the peripheral device. Further, when the user wants to end the transmission of the voice, the user presses the microphone button 12 again. The communication unit 1 modulates the input voice into a signal of a predetermined method and outputs it as a radio wave from the antenna 13. The antenna 13 also receives radio waves transmitted from the CD player 2.
[0015]
The CD player 2 demodulates the radio wave received by the antenna 21 and outputs sound via the headphones 22 or reproduces music data recorded on the CD 23 mounted on the CD player 2, and the headphones 22. Output to.
[0016]
For communication between the communication unit 1 and the CD player 2, the wireless communication standard Bluetooth ( Registration Wireless communication conforming to the trademark) is used. Although only one CD player 2 is shown in FIG. 1, a plurality of CD players 2 may be provided.
[0017]
FIG. 2 is a block diagram showing an internal configuration of the communication unit 1. The microphone 11 inputs a user's voice and supplies it to a codec (CODEC) processing unit 31. The codec processing unit 31 performs A / D (Analog to Digital) conversion on the input audio signal, encodes it into a communication format, and outputs the encoded signal to a baseband processing unit 32.
[0018]
In bluetooth voice communication, 64 kbps CVSD (Continuo Variable Slope Delta Modulation) format, or 64 kbps A-law and μ-law are used.
[0019]
The baseband processing unit 32 packetizes the input audio signal into a Bluetooth communication packet based on a command from the control microcomputer 33, performs error correction coding processing, etc., and then performs RF (Radio Frequency) processing. To the unit 35. The baseband processing unit 32 also performs error correction coding processing on the received data input via the RF processing unit 35. If the baseband processing unit 32 cannot correctly receive data, a message requesting retransmission is transmitted to the CD player 2.
[0020]
The RF processing unit 35 converts audio data and communication data from the baseband processing unit 32 into analog wireless data, and transmits the analog wireless data to the CD player 2 via the antenna 13. The RF processing unit 35 also demodulates communication data received by the antenna 13, further A / D-converts it, and outputs it to the baseband processing unit 32.
[0021]
The input unit 34 generates a predetermined signal corresponding to the operation of the microphone button 12 and outputs it to the control microcomputer 33.
[0022]
The control microcomputer 33 appropriately reads a program previously stored in the memory 36 and executes processing. For example, after reading a program stored in the memory 36 based on a signal corresponding to a user operation supplied from the input unit 34 and selecting a predetermined one from the plurality of CD players 2, A procedure for establishing a connection with the CD player 2 is executed (a specific example thereof will be described later). When communication with the CD player 2 is established, the control microcomputer 33 controls the baseband processing unit 32 to transmit audio data to the CD player 2 via the RF processing unit 35 and the antenna 13.
[0023]
A program executed by the control microcomputer 33 is stored in the memory 36 in advance, or a magnetic disk 42, an optical disk 43, a magneto-optical disk 44, or a semiconductor memory 45 driven by a drive 41 that is detachably connected. And so on.
[0024]
FIG. 3 is a block diagram showing an internal configuration of the CD player 2. The CD 23 is mounted on a spindle 51A that is rotated at a predetermined rotational speed by a spindle motor 51. The pickup 52 irradiates the signal surface of the CD 23 with light from a built-in laser diode (not shown) and reads data from the reflected light. Here, the pickup 52 is moved in the radial direction of the CD 23 by the servo circuit 53. The servo circuit 53 servo-controls the spindle motor 51 and the pickup 52 based on a command from the control microcomputer 55.
[0025]
The demodulation circuit 54 is controlled by the control microcomputer 55, performs EFM demodulation on the data read by the pickup 52, performs error correction coding processing, and the like, and then outputs the D / A converter 56. The D / A converter 56 D / A converts the input data and outputs it to the amplifier 58. The amplifier 58 amplifies the input data and outputs the amplified data to the headphones 22 via the switch 59 and the headphone jack 60 to reproduce the music data.
[0026]
The switch 59 is switched so as to select the terminal a when reproducing music data from the CD 23 based on a command of the control microcomputer 55, and the audio data from the communication unit 1 (microphone 11) transmitted is transmitted. Is switched to select the terminal b.
[0027]
The RF processing unit 61 demodulates communication data and audio data received by the antenna 21, further A / D-converts, and outputs the result to the baseband processing unit 62. The RF processing unit 61 also converts data (packets) for communication from the baseband processing unit 62 into analog wireless data, and transmits the analog wireless data to the communication unit 1 via the antenna 21.
[0028]
The baseband processing unit 62 performs error correction coding processing on the communication data input from the RF processing unit 61. When the baseband processing unit 62 cannot correctly receive data, a message requesting retransmission is transmitted to the communication unit 1. The baseband processing unit 62 also packetizes communication data into a Bluetooth communication packet based on a command from the control microcomputer 55, performs error correction coding processing, etc., and then outputs the packet to the RF processing unit 61. To do.
[0029]
Further, the baseband processing unit 62 outputs the audio data from the RF processing unit 61 to the codec processing unit 63. The codec processing unit 63 demodulates the input audio data, further D / A-converts it, and outputs it to the headphones 22 via the switch 59 and the headphone jack 60 to reproduce the audio data.
[0030]
The control microcomputer 55 controls the servo circuit 53, the demodulation circuit 54, the switch 59, the baseband processing unit 62, and the like based on a command from the user (such as a command for reproducing music data recorded on the CD 23). . The control microcomputer 55 also communicates the data (unique ID, etc.) of the CD player 2 stored in the memory 57 in a procedure for establishing a communication connection with the communication unit 1 (specific examples will be described later). Send to unit 1. When the connection is established, the control microcomputer 55 switches the switch 59 to the terminal b so that the audio data transmitted from the communication unit 1 can be output to the headphone jack 60.
[0031]
At this time, the CD player 2 functions as a wireless headphone of the communication unit 1, not for music playback.
[0032]
Next, a communication protocol stack for performing communication between the communication unit 1 compatible with Bluetooth and the CD player 2 will be described with reference to FIG. In the figure, the module shown in the upper part is of a higher hierarchy than the module shown in the lower part.
[0033]
The RF classified into the physical layer plays a role of converting digital data into analog data and transmitting it through an antenna or converting analog data received by the antenna into digital data. Specifically, the primary modulation of the digital data is performed according to the sequence consisting of 0 and 1 of the digital data, which is further superimposed on a carrier wave using a 2.4 GHz frequency band and transmitted. The frequency of this carrier wave is constantly hopped by a frequency hopping (FHSS (Frequency Hopping Spread Spectrum)) method in which the frequency is changed for each transmission of data (time slot).
[0034]
Thus, data transmission or reception is alternately performed for each time slot. Therefore, in the reception slot, the carrier wave in the 2.4 GHz frequency band is removed from the signal received by the antenna, and then demodulation is performed. And take out the digital data of the sequence consisting of 1. Here, the frequency band of the carrier to be removed is constantly changed by frequency hopping, but the hopping sequence is recognized according to the communication partner.
[0035]
Baseband classified as a link layer mainly plays a role of performing control for requesting retransmission of data. Specifically, on the transmission side, various communication information such as an error correction code is added to the original data for transmission, and the reception side returns a response as to whether or not the data has been correctly received. If the data is not correctly received, the receiving side requests the transmitting side to retransmit the data. However, the number of retries is set on the transmission side, and if the data is not received on the reception side even if the set number of times is exceeded, retransmission is stopped.
[0036]
Further, LMP (Link Management Protocol) classified in the link layer plays a role of controlling a link state with a connection destination by Bluetooth communication. For example, the following control is performed.
・ Establish and release connection status
・ Mode control according to the presence / absence of data to be transmitted / received, communication frequency, etc.
・ Switching packet types according to the communication path status
・ Authentication of whether to allow data communication
・ Encryption during data communication
[0037]
The links in this layer are classified into two types: ACL (Asynchronous Connectionless) links and SCO (Synchronous Connection-Oriented) links.
[0038]
The ACL link is used for linking in a packet switching system, and is used for the purpose of data communication and communication control. For example, when this link is established, when a device serving as a master (leading) of Bluetooth communication transmits data, a device serving as a slave (subordinate) can respond to the inquiry (data). However, since the master always has the initiative, the slave cannot respond (reply) unless it receives some data (message) from the master.
[0039]
The SCO link is used for linking by a circuit switching method, and is mainly used for voice communication (voice communication). For example, when this link is established, the slave holds communication slots at regular time intervals. Even when communication is not being performed, the communication slot remains held. Therefore, the slave can transmit data to the master without receiving data (message) from the master.
[0040]
Since an ACL link is used for control, it is indispensable between Bluetooth devices that perform communication. In addition, when performing voice communication, it is necessary to establish an SCO link after establishing an ACL link between Bluetooth devices.
[0041]
Furthermore, L2CAP (Logical Link Control & Adaptation Protocol) classified in the link layer plays a role of defining a logical channel. The connection between two Bluetooth devices is physically connected by one ACL link, but logically, a plurality of channels can be defined there. As a result, various types of higher-level protocol data can be transmitted and received simultaneously. However, when the data size supplied from the upper protocol is large, it is divided into the packet size defined in the baseband and transmitted, and the divided packet is integrated into the original data on the receiving side.
[0042]
The application of the communication unit 1 classified into the application layer is for searching for a transmission destination (slave) for transmitting audio and communicating with the transmission destination. The application of the CD player 2 is for communicating with the master, or for switching the output so as to output the transmitted audio data when communication is established.
[0043]
Next, with reference to the flowcharts of FIGS. 5 and 6, the audio interrupt process executed by the communication unit 1 and the CD player 2 (in this example, the CD players 2-1 and 2-2) will be described. In step S1, the control microcomputer 33 of the communication unit 1 determines whether or not the microphone button 12 is pressed by the user based on the signal supplied from the input unit 34, and the microphone button 12 is not pressed. If it is determined that the microphone button 12 is pressed in step S1, the process waits.
[0044]
If it is determined in step S 1 that the microphone button 12 has been pressed, the process proceeds to step S 2, where the control microcomputer 33 reads the unique ID of the communication unit 1 stored in advance in the memory 36, and the baseband processing unit 32. To be included in the Baseband packet and supplied to the RF processing unit 35. Then, the RF processing unit 35 converts the supplied data into analog wireless data, and broadcasts the unique ID of the communication unit 1 via the antenna 13.
[0045]
Here, with reference to FIG. 7, the Baseband packet used by Bluetooth communication at the time of link establishment is demonstrated. The Baseband packet includes a 72-bit Access Code (access code), a 54-bit Packet Header (packet header), and an FHS (Frequency Hop Synchronization) Payload (FHS payload).
[0046]
In the Access Code, an address indicating which Bluetooth communication device the packet is related to is stored, and in the Packet Header, information related to control of Bluetooth communication is stored. For example, a packet type, a retransmission request flag, and the like are included.
[0047]
The FHS payload includes 34-bit parity, 24-bit LAP (Lower Address Part), 8-bit UAP (Upper Address Part), 16-bit NAP (Non-Significant Address Part), 24-bit CoD (Class of Device) / Service), 26-bit Clock (clock). Note that LAP, UAP, and NAP are collectively referred to as BD_ADDR (Bluetooth Device Address), and the contents thereof are defined by IEEE (The Institute of Electrical and Electronics Engineers) 802. The FHS payload also includes information for setting the number of times to request retransmission when a packet is not received. Furthermore, AM_ADDR (Active Member Address) assigned by the master to the slave is also included. AM_ADDR is an address in the piconet.
[0048]
The piconet is a star-type network formed around one master in Bluetooth communication, and a maximum of seven IDs 1 to 7 are assigned to one piconet.
[0049]
Returning to FIG. 5, in the process of step S <b> 2 for searching for a device that performs Bluetooth communication, the Access Code of the transmitted Baseband packet stores an address that targets all devices that can receive the packet. ing.
[0050]
In step S31, the antenna 21 of the CD player 2-1 receives the data (Baseband packet) transmitted from the communication unit 1. Then, the RF processing unit 61 demodulates the data received by the antenna 21, further A / D converts it, and outputs it to the baseband processing unit 62. In step S32, the baseband processing unit 62 of the CD player 2-1 determines the unique ID of the CD player 2-1 itself and the service contents provided by the CD player 2-1 (whichever Is also included in the Baseband packet and transmitted to the communication unit 1.
[0051]
In step S61, the CD player 2-2 receives the data transmitted from the communication unit 1. In step S62, the CD player 2-2 includes the unique ID of the CD player 2-2 and the service content provided by the CD player 2-2 in the Baseband packet, and transmits them to the communication unit 1.
[0052]
In the Baseband packet (FHS payload) transmitted in Step S32 and Step S62, BD_ADDR that is an absolute ID for each device assigned to the device, what the device is, and the device's Cod indicating service (function) content is included.
[0053]
In step S3, the antenna 13 of the communication unit 1 receives the unique ID and the service content transmitted from the CD players 2-1 and 2-2, respectively. Then, the RF processing unit 35 demodulates the data received by the antenna 13, further A / D-converts it, and outputs it to the baseband processing unit 32. The baseband processing unit 32 performs error correction coding processing on the input data and then outputs the data to the control microcomputer 33.
[0054]
In step S4, the control microcomputer 33 of the communication unit 1 determines whether there is a CD player capable of receiving sound based on the service content received in step S3, and if there is a CD player capable of receiving sound. If determined, the process proceeds to step S5. For example, if it is determined that the CD player 2-1 can receive sound, the baseband processing unit 32 of the communication unit 1 determines that the CD player 2-1 is based on a command from the control microcomputer 33 in step S5. Send a Page message. At this time, the Page message (Baseband packet) includes an Access Code based on the BD_ADDR of the CD player 2-1 as the destination.
[0055]
In step S <b> 33, the baseband processing unit 62 of the CD player 2-1 receives the Page message transmitted via the antenna 21 and the RF processing unit 62. At this time, the CD player 2-1 knows from the Access Code that the packet is addressed to itself. In step S34, the baseband processing unit 62 of the CD player 2-1 receives the Page message from the communication unit 1, and notifies the communication unit 1 that the Page message has been received.
[0056]
In step S6, the baseband processing unit 32 of the communication unit 1 receives the response (response indicating that the Page message has been received) from the CD player 2-1. In step S <b> 7, the baseband processing unit 32 of the communication unit 1 transmits a Baseband packet to the CD player 2-1 based on a command from the control microcomputer 33. At this time, in the Baseband packet (FHS payload), AM_ADDR (ID in the piconet) that is information for the participation of the slave CD player 2-1 in the piconet whose communication unit 1 is the master, and frequency hopping of the master Sequence, and clock phase information.
[0057]
In step S35, the baseband processing unit 62 of the CD player 2-1 receives the Baseband packet transmitted from the communication unit 1. At this time, the CD player 2-1 knows that the packet is addressed to itself from the Access Code, and receives the ID in the piconet to which it belongs from AM_ADDR. In step S36, the baseband processing unit 62 of the CD player 2-1 receives the Baseband packet from the communication unit 1, and notifies the communication unit 1 that the Baseband packet has been received.
[0058]
In step S8, the baseband processing unit 32 of the communication unit 1 receives a response from the CD player 2-1 (a response indicating that a Baseband packet has been received). In step S <b> 9, the baseband processing unit 32 of the communication unit 1 transmits a connection request to the CD player 2-1 based on a command from the control microcomputer 33.
[0059]
In step S37, the baseband processing unit 62 of the CD player 2-1 receives the connection request transmitted from the communication unit 1. In step S38, the baseband processing unit 62 of the CD player 2-1 allocates a predetermined channel (logical channel) for communication with the communication unit 1 based on a command from the control microcomputer 55. Send a connection acceptance response.
[0060]
In the above-described example, the CD player 2-1 does not limit the connection partner. However, when it is desired to allow connection only from a specific partner, the mutual connection between the process of step S37 and the process of step S38 is performed. Authentication processing is added. As an authentication method, for example, ISO (International Organization for Standardization) 9798 can be used.
[0061]
In step S10, the baseband processing unit 32 of the communication unit 1 receives a connection acceptance response including data indicating a channel used for communication transmitted from the CD player 2-1.
[0062]
As described above, the ACL link is established between the communication unit 1 and the CD player 2-1 by the processes of steps S 1 to S 10, steps S 31 to S 38, and steps S 61 and S 62, and application level data communication is performed. It becomes possible.
[0063]
Subsequently, in step S <b> 11, the baseband processing unit 32 of the communication unit 1 transmits a message requesting establishment of the SCO link to the CD player 2-1 based on a command from the control microcomputer 33.
[0064]
In step S39, the baseband processing unit 62 of the CD player 2-1 receives the message requesting establishment of the SCO link from the communication unit 1. In step S <b> 40, the baseband processing unit 62 of the CD player 2-1 transmits a response to accept the SCO link establishment request based on a command from the control microcomputer 55.
[0065]
At this time, the control microcomputer 55 of the CD player 2-1 switches the switch 59 to the terminal b so as to reproduce the audio data transmitted from the communication unit 1 (microphone 11). Thereby, even if the user of the CD player 2-1 has been listening to the reproduction sound of the CD 23 with the headphones 22 until then, it is interrupted.
[0066]
In step S12, the baseband processing unit 32 of the communication unit 1 receives the response to accept the SCO link establishment request transmitted from the CD player 2-1. In step S <b> 13, the user inputs sound from the microphone 11. In step S <b> 14, the codec processing unit 31 of the communication unit 1 performs A / D conversion on the input audio signal, encodes it into a communication format, and outputs it to the baseband processing unit 32. Then, the baseband processing unit 32 transmits audio data to the CD player 2-1 based on a command from the control microcomputer 33.
[0067]
In step S41, the baseband processing unit 62 of the CD player 2-1 receives the transmitted audio data. The codec processing unit 63 demodulates the input audio data, further D / A converts it, outputs it to the headphones 22 via the switch 59 and the headphone jack 60, and the audio data is reproduced.
[0068]
In step S15, the control microcomputer 33 of the communication unit 1 determines whether or not the microphone button 12 is pressed by the user based on the signal supplied from the input unit 34, and the microphone button 12 is not pressed. If it is determined, the process returns to step S13 and the above-described processing is repeated. If it is determined in step S15 that the microphone button 12 has been pressed, the process proceeds to step S16, where the baseband processing unit 32 sends a message for releasing the SCO link based on a command from the control microcomputer 33 to the CD player. 2-1.
[0069]
In step S42, the baseband processing unit 62 of the CD player 2-1 receives the transmitted message for releasing the SCO link. In step S 43, the baseband processing unit 62 of the CD player 2-1 notifies the communication unit 1 of a response indicating that a message for releasing the SCO link has been received based on an instruction from the control microcomputer 55. .
[0070]
In step S17, the baseband processing unit 32 of the communication unit 1 receives a response (a response indicating that a message for releasing the SCO link has been received) transmitted from the CD player 2-1. In step S <b> 18, the baseband processing unit 32 of the communication unit 1 transmits a message for releasing the ACL link to the CD player 2-1 based on a command from the control microcomputer 33.
[0071]
In step S44, the baseband processing unit 62 of the CD player 2-1 receives the transmitted message for releasing the ACL link. In step S45, the baseband processing unit 62 of the CD player 2-1 notifies the communication unit 1 of a response indicating that a message for releasing the ACL link has been received based on a command from the control microcomputer 55. .
[0072]
In step S19, the baseband processing unit 32 of the communication unit 1 receives the response (a response indicating that the message for releasing the ACL link has been received) transmitted from the CD player 2-1, and the processing ends. The
[0073]
If it is determined in step S4 that there is no CD player capable of receiving audio, the audio data cannot be transmitted, and the process ends.
[0074]
As described above, when the connection is established with the CD player 2-1 capable of receiving sound, the communication unit 1 can transmit the input sound data to the CD player 2-1 to interrupt the sound.
[0075]
Note that, when there is a transmission request from the communication unit 1, the CD player 2 is allowed to interrupt audio data unconditionally. However, the present invention is not limited to this, and the user of the CD player 2 The CD player 2 may be provided with a selection input button that can select whether or not to permit interruption of audio data.
[0076]
In the above description, the CD player 2-1 functions as a wireless phone of the communication unit 1. However, for example, when two Bluetooth communication devices are both equipped with both a microphone and a headphone, It is also possible to function as a transceiver by voice communication.
[0077]
Furthermore, in the above description, the operation for interrupting audio data during the reproduction of music data has been described. However, the present invention is not limited to this, and for example, a user displays an image such as a moving image or a still image on a mobile terminal. Sometimes, emergency information (for example, earthquake information, accident occurrence information, etc.) may be interrupted by text or voice to notify the user.
[0078]
The series of processes described above can be executed by hardware, but can also be executed by software. When a series of processing is executed by software, a program constituting the software may execute various functions by installing a computer incorporated in dedicated hardware or various programs. For example, it is installed from a program storage medium in a general-purpose personal computer or the like.
[0079]
As shown in FIG. 2, a program storage medium for storing a program installed in a computer and made executable by the computer includes a magnetic disk 42 (including a floppy disk), an optical disk 43 (CD-ROM (Compact Disk-Read). Package memory or programs that consist of only memory (including only memory), DVD (including digital versatile disk), magneto-optical disk 44 (including MD (mini-disk)), or semiconductor memory 45, or programs are stored temporarily or permanently. It is composed of a hard disk or the like. The program is stored in the program storage medium using a wired or wireless communication medium such as a local area network, the Internet, or digital satellite broadcasting via an interface such as a router or a modem as necessary. Is called.
[0080]
Further, in this specification, the steps for describing the program provided by the medium are performed in parallel or individually in accordance with the described order, as well as processing performed in time series, not necessarily in time series. The process to be executed is also included.
[0081]
In the present specification, the term “system” represents the entire apparatus constituted by a plurality of apparatuses.
[0082]
【The invention's effect】
As above According to the present invention, Even when data on a recording medium is being reproduced at an arbitrary place, it is possible to reliably receive data from the communication device.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration example of an information processing system to which the present invention is applied.
FIG. 2 is a block diagram illustrating a configuration example of a communication unit 1 in FIG.
FIG. 3 is a block diagram illustrating a configuration example of the CD player 2 in FIG. 1;
FIG. 4 is a diagram illustrating a communication protocol stack.
FIG. 5 is a flowchart illustrating voice interrupt processing.
FIG. 6 is a flowchart following FIG. 5;
FIG. 7 is a diagram illustrating a Baseband packet.
[Explanation of symbols]
1 communication unit, 2 CD player, 11 microphone, 12 microphone button, 23 CD, 32 baseband processing unit, 33 control microcomputer, 34 input unit, 35 RF processing unit, 36 memory, 55 control microcomputer, 57 memory , 61 RF processor, 62 baseband processor, 59 switches

Claims (5)

Communication means;
Control means for controlling the communication means;
Reproducing means for reproducing the content data stored in the storage medium;
In a communication apparatus comprising: output means for outputting the content data reproduced by the reproduction means;
It said control means causes the transmitting and receiving packets containing information indicating the function of the assigned ID information and device to device to an external device and another, control between the external device by the communication means is in communication with the communication device When a connection request is received from the external device after the link is established and the control link is established between the external device and the communication device, the external device is permitted to receive an audio signal. to send a signal for the reproducing means in place of the content data is reproduced, a communication device for outputting the audio signal received from said external device to said output means. The communication apparatus according to claim 1, wherein the communication unit transmits and receives data using wireless communication conforming to Bluetooth (registered trademark). The communication apparatus according to claim 1, wherein the communication apparatus is a wireless audio output apparatus of the external device. The external device includes switching means for switching whether to transmit a signal including the audio signal to the communication device,
The control means establishes the control link and the voice communication link between the external device and the communication device, and the control link and the voice communication link between the external device and the communication device. When the signal for permitting the reception of the audio signal is transmitted to the external device after the signal is established, the switching means inputs the switching from non-transmission to transmission of the signal including the audio signal. The communication apparatus according to claim 1, wherein the output unit outputs the audio signal transmitted from the external device when the output is performed. In the external device, when the control unit causes the output unit to output the audio signal received from the external device, switching from transmission of the signal including the audio signal to non-transmission is input to the switching unit. The communication apparatus according to claim 4 , wherein the voice communication link is released when the communication is performed.

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