JP2003216289A - Data reproduction system and computer system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce costs necessary to a user and to improve availability to the user when the user reproduces data in various situations. <P>SOLUTION: An audio system 1 is provided with a notebook-sized PC 3 for storing music data, and a head unit 2 connectable to the notebook-sized PC 3 and constituting car audio equipment. The notebook-sized PC 3 is provided with a hinge for opening and closing the cover part 3a of the notebook-sized PC 3, operates when the cover part 3a is opened and falls into a sleep state when the cover part 3a is closed. When it is detected that a USB cable 4 is connected, the notebook-sized PC 3 shifts itself from a sleep state to an active state even while the cover part 3a is closed to decode the music data inside, outputting the decoded music data to the head unit 2 side. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a data reproducing system for reproducing data recorded in a storage (recording) means of a computer by a reproducing apparatus such as an audio device, and particularly such a data reproducing system. The present invention relates to a computer device suitable for use with.

[0002]

2. Description of the Related Art As is well known, in order to reproduce music data in an audio device, CD-R (CD Recordable), CD-RW (CD
Rewritable), MD (Mini Disc), or a recording medium (storage medium) such as a memory card is set in an audio device to reproduce music data. Further, in recent years, the music data recorded on such a recording medium is often data in a compressed audio format,
The audio device includes a decoding LSI (Large Scale Integrated C) that decodes compressed audio format data.
ircuit) is becoming available.

[0003]

By the way, in order to reproduce music data in different places, it is necessary to prepare an audio device for home, vehicle, portable, etc., according to the listening situation of music. In such a case, in order to reproduce the compressed audio format data in each device, each device needs a decoding LSI. As a result, the total cost for the user increases, and there is a problem in terms of efficiency or environmental load. Moreover, such a problem becomes noticeable every time a new function is added to the audio device and a new LSI device is mounted on the device.

Further, taking compressed audio as an example, even if a user stores digital data in a PC (Personal Computer), when actually listening to it,
The user writes the data in the storage medium as described above in advance, and listens to the music in the in-vehicle device or the portable device. In such cases,
A lot of storage media are required depending on the situation of listening to music, and the user is required to perform a writing operation to a storage medium that is not the original purpose.

The present invention has been made based on such a technical problem, and when the user reproduces data in various situations, the cost required for the user is reduced and, in this case, The main purpose of the present invention is to provide a data reproducing system or the like that improves the usability of the.

[0006]

Based on the above object, the data reproducing system of the present invention is connectable to a computer device for storing predetermined record data and reading and outputting the record data. In addition, the computer device has a reproducing device for reproducing the recorded data output from the computer device, and the computer device has an opening / closing mechanism for opening / closing the computer device, operates when the opening / closing mechanism is opened, and operates when it is closed. When the computer device detects that the computer device and the playback device are connected with the opening / closing mechanism closed, the computer device transitions from the sleep state to the active state. Is characterized by.

With such a configuration, for example, when the computer device is a notebook PC, it is connected to the reproducing device with the lid closed and the computer device is operated to reproduce the recorded data by the reproducing device. can do. In this case, if the compressed audio is decoded on the PC side, the reproducing apparatus does not need an LSI for decoding the compressed audio. further,
Since the lid of the PC is closed, recorded data can be output from the PC without using the display. Here, as the computer device, in addition to a notebook PC, a PDA (Personal Digital Assistant) is used.
nt) and mobile phones that have an opening / closing mechanism.

Further, in this case, the reproducing apparatus is provided with an operating section for the user to operate, and when the reproducing apparatus and the computer apparatus are connected, the input operation in the operating section is transmitted to the computer apparatus as a control signal. Output,
It is preferable that the computer device, when the computer device is in the active state, reads out the record data based on a control signal input to the computer device and outputs the record data to the reproducing device. With such a configuration, it is possible to read the recorded data by operating the computer device from the reproducing device side with the opening / closing mechanism of the computer device closed.

Further, it is preferable that the computer device maintains the active state after detecting the connection with the reproducing device and transiting from the sleep state to the active state. In this case, the computer device continuously operates. The recorded data can be output to.

Further, the computer apparatus is a notebook PC (Personal PC) having a lid portion which is opened and closed by an opening / closing mechanism.
It is desirable to be portable, such as a computer), so that the computer device can be connected to the playback device in various situations.

Further, the computer device and the reproducing device are
If the computer device is connected via the input / output interface cable of the computer, and the computer device detects that the computer device and the playback device are connected depending on whether the input / output interface cable is connected,
The computer device and the playback device can be easily connected, and the computer device can easily detect that the playback device is connected.

The present invention can also be understood as an invention of the following data reproducing system. That is,
A data reproducing system to which the present invention is applied includes a computer device that stores predetermined record data, reads out and outputs the record data, and a reproducing device that is connected to the computer device and has an operation unit for a user to operate. The playback device outputs a control signal to the computer device based on an input operation in the operation unit, and the computer device is formed to be openable and closable, and in the closed state, the control signal output from the playback device. Is received, and the recording data is transmitted to the reproducing device based on the received control signal, and the reproducing device reproduces the recording data output from the computer device.

Further, the present invention can be understood as the invention of the following computer device. That is,
A computer device to which the present invention is applied is a computer device including a storage unit that stores predetermined data and a data reading unit that reads out and outputs the data stored in the storage unit. And a connection detecting means for detecting that another device is connected to the computer device and outputting a detection signal, the data reading means being a predetermined unit. Regardless of the condition, the data is read out and output based on the detection signal. With such a configuration, data can be read from the computer device in the sleep state.

Further, in this case, the computer device has a display, and the display is formed to be openable and closable, and if the predetermined condition is that the display is closed, the display is closed. Data can be read from the computer in the folded state.

Further, if the other device is an in-vehicle device mounted in an automobile, the computer device can provide a service to the in-vehicle device in a narrow space inside the vehicle with the display of the computer device folded. It will be possible.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail based on the embodiments shown in the accompanying drawings. FIG. 1 shows an audio system (data reproduction system) 1 according to this embodiment.
It is a figure which shows the whole structure of. This audio system 1
In the above, a head unit 2 which is one unit of a car audio device (playback device) mounted on an automobile,
Notebook type PC (computer device) 3 is US
It is configured to be connected via a B (Universal Serial Bus) cable (input / output interface cable) 4, a conversion unit 5, and an audio cable 6.
The audio system 1 operates so that car audio equipment reproduces music data composed of compressed audio data recorded in a hard disk drive incorporated in a notebook PC 3. The notebook PC 3 has an opening / closing mechanism (not shown) including a hinge for opening / closing the lid 3a. A display of the notebook PC 3 is formed on a surface (not shown in FIG. 1) of the lid 3a. The display operates when the lid 3a is opened and when the lid 3a is closed. The operation is stopped. Also,
As will be described later, in the audio system 1, the notebook PC 3 can be used with the lid portion 3a closed.

FIG. 2 is a block diagram showing the audio system 1. As shown in the figure, the audio cable 6 exchanges data other than music data between the head unit 2 and the conversion unit 5 and two systems of audio pin cables 9 capable of transmitting analogized music data. And a control bus 10 for The USB cable 4 connects the USB connector 11 of the notebook PC 3, the conversion unit 5, and the USB hub 12.

The conversion unit 5 includes a USB hub 12 and a U
The SB / DA converter 13 and the USB / control bus converter 14 are provided. Of these, the USB hub 12 is connected to one end of the USB cable 4, and the USB / DA converter 13 and the USB / DA converter 13 are connected.
It is connected to both of the control bus conversion units 14. Further, the USB / DA converter 13 converts the PCM format music data transmitted from the notebook PC 3 via the USB cable 4 and the USB hub 12 into an analog signal and outputs the analog signal to the audio pin cable 9. In addition, the USB / control bus converter 14
Recognizes data other than music data transmitted from the notebook PC 3, converts it into a control bus command that can be transmitted by the control bus 10, and outputs the control bus command to the control bus 10, or the head unit 2 It has a function of outputting a predetermined command transmitted from the side via the control bus 10 to the USB cable 4 side as a USB data frame. Further, the USB / control bus conversion unit 14 also has a function of independently responding to a predetermined command transmitted from the head unit 2 side via the control bus 10.

FIG. 3 shows the internal structure of the notebook PC 3. As shown in the figure, a notebook type P
Inside C3, in addition to the USB connector 11, a USB host controller 16 and a general-purpose microcomputer 17 are provided. The USB host controller 16 has D + and D- terminals. These terminals D + and D
-Is set to the GND level when no device is connected to the USB connector 11, and US
When any USB device is connected to the B connector 11, the terminal D + becomes High when the data transfer speed is the full speed mode, and the terminal D− becomes High when the data transfer speed is the low speed mode. As a result, the USB host controller 16 can detect whether or not a USB device is connected to the USB connector 11 and also detect the type of data transfer speed of the detected USB device.

Further, the USB host controller 16 is
An HW (Hardware) interrupt bus B that detects that a USB device is connected to the USB connector 11 and connects the USB host controller 16 and the general-purpose microcomputer 17
1 has a function of outputting a HW interrupt notification.

The general-purpose microcomputer 17 is connected to the USB host controller 16 as a memory-mapped I / O, and in addition to the HW interrupt bus B1, the USB host controller 16 has an address bus B2 and a data bus B3. It is connected to the controller 16. Where H
The W interrupt bus B1 is connected to the external interrupt port 17a of the general-purpose microcomputer 17. The external interrupt port 17a is formed so that the general-purpose microcomputer 17 can automatically cancel the sleep mode when the general-purpose microcomputer 17 is in the sleep mode when the HW interrupt notification is input. .

FIG. 4 is a block diagram showing the structure of software for controlling the audio system 1. As shown in the figure, the audio system 1 includes state management software 20 and a virtual CDC (Compact Disc Changer).
Software 21, USB device driver 22, US
It is controlled by the B / control bus conversion software 23 and the control bus control software 24. Of these, the state management software 20 controls the operation state of the general-purpose microcomputer 17 to the sleep mode or the active mode. In the sleep mode, the operation of the display of the notebook PC 3 is stopped, In the active mode, the power supply of the display is controlled so that the display of the notebook PC 3 is operated. Further, the state management software 20 sets the general-purpose microcomputer 17 to the sleep mode when the lid 3a of the notebook PC 3 is closed (when the opening / closing mechanism is closed), and the lid 3a of the notebook PC 3 is It functions to put the general-purpose microcomputer 17 in the active mode when it is opened (when the opening / closing mechanism is opened).

The virtual CDC software 21 is software developed on the program area of the general-purpose microcomputer 17 of the notebook PC 3, and generally contains a plurality of CDs for storing music data recorded on the hard disk. This is handled in the same manner as the music data of each CD in the CD changer. Specifically, the virtual CDC software 21 recognizes a music data group consisting of a plurality of tracks recorded on a hard disk drive as one or a plurality of virtual CDs, and reads out and decodes music data from each virtual CD. Along with
In response to a control signal output from the head unit 2 through the control bus 10, the state of the virtual CDC is changed (for example, the track next to the track being reproduced is read from the virtual CD, or display data related to the read music data is displayed. Output). Further, the virtual CDC software 21 displays a display screen called a CD magazine for adding or deleting a virtual CD, or registering / deleting music data in the virtual CD on the screen, and user input on this display screen. It has a function to detect the input operation of.

The USB device driver 22 has a U
A USB audio device driver 26 that controls the SB / DA converter 13, a general-purpose USB hub driver 27 that controls the USB hub 12, and a USB / control bus conversion device driver 28 that controls the USB / control bus conversion unit 14. I have it. Of these, the USB audio device driver 26 and the general-purpose USB hub driver 27 are, for example, an OS (Operating Syst) that performs system management of a notebook PC.
em) 29 is used, and the USB / control bus conversion device driver 28 that is uniquely designed is used.

The USB / control bus conversion software 23 is firmware recorded in the USB / control bus conversion unit 14 of the conversion unit 5,
The notebook PC 3 handles it as a USB device, and the head unit 2 handles it as a CD changer. Further, the control bus control software 24 is existing software installed in the head unit 2 and has a function of controlling the CD changer through the control bus 10.

Next, the operation of the audio system 1 will be described. In the audio system 1, as a main operation, first, a notebook PC 3
An initial link operation for starting communication when the head unit 2 and the head unit 2 are connected via the conversion unit 5,
Time polling operation for maintaining the connection state between the head unit 2 and the conversion unit 5, and user operation support for transmitting data from the notebook PC 3 to the head unit 2 in response to a user operation on the head unit 2. The action is taken. Each operation will be described below.

[Initial Link Operation] FIG. 5 is a software block diagram showing the operation of the notebook PC 3 in the initial link operation, and FIG. 6 is an example of the overall operation of the audio system 1 in the initial link operation. It is a flowchart shown. The initial link operation is performed while the notebook PC 3 and the head unit 2 are both powered on. That is, on the notebook PC 3 side, the OS 2
9, state management software 20, virtual CDC software 21, USB device driver 22 is launched,
On the head unit 2 side, the control bus control software 24 is in a booted state. Further, when the initial link operation is performed, it is assumed that the lid 3a of the notebook PC 3 is kept closed. In other words, notebook PC3
Is in sleep mode.

First, referring to FIG. 5, a notebook type P
The operation of the notebook PC 3 when the USB cable 4 connected to the head unit 2 is connected to the USB connector 11 of C3 as shown in FIG. 1 will be described. A rectangular block shown by a single line in FIG. 5 is a general-purpose microcomputer 17 in the notebook PC 3.
The rectangular blocks indicated by double lines represent software related to state transition.

First, the USB connector 11
When the cable 4 is connected, the USB host controller 16 detects it and outputs a HW interrupt notification to the general-purpose microcomputer 17. In response to this, general-purpose microcomputer 1
At 7, the state is automatically changed from the sleep state s1 to the active state s2. Further, the general-purpose microcomputer 17 in the active state s2 notifies the state management software 20 of the occurrence of the HW interrupt and its type.

In this case, since the lid part 3a of the notebook PC 3 is closed, the general-purpose microcomputer 17 returns to the sleep state s1 again by the instruction of the state management software 20 unless otherwise specified. , Here, the active state s2 of the general-purpose microcomputer 17 is maintained by performing the following processing, and the virtual CD
The activation state of the C software 21 is maintained.

That is, the state management software 20 receives an instruction from the general-purpose microcomputer 17 and receives a virtual CDC.
H for each application including software 21
Notify that there was a W interrupt. Here, virtual C
The DC software 21 outputs a request for canceling the sleep state s1 to the state management software 20 based on the notification from the state management software 20. In response to this request, the state management software 20 switches the control so that the state of the general-purpose microcomputer 17 becomes the active state s2, whereby the general-purpose microcomputer 17 switches to the active state maintenance s3 that maintains the active state s2. The state changes. As described above, the notebook PC 3 maintains the active state s2 of the general-purpose microcomputer 17 even when the lid 3a is closed,
As a result, the virtual CDC software 21 can be placed in the operating state. Here, the state management software 20 realizes a partial active state in which an application stored in the general-purpose microcomputer 17 and a communication or the like performed by this application can be operated without operating a display or the like. And

Next, an example of the entire initial link operation in the audio system 1 after the notebook type PC 3 is activated as described above will be described with reference to FIG. When the conversion unit 5 is connected to the notebook PC 3 via the USB cable 4, the USB
Power is supplied to the conversion unit 5 from the notebook PC 3 side through the cable 4, and the conversion unit 5 is in a state where the USB / control bus conversion software 23 is started up. In this state, as shown in FIG. 6, first, the OS 29 of the notebook PC 3
The link permission notification is transmitted to the conversion unit 5 (step S11a). At this time, the virtual CDC software 21 also transmits the identity information as the CDC of the virtual CDC software 21 to the conversion unit 5. This identity information is 10 CDs
It is set as the identity information indicating that it is C. On the other hand, in response to the link permission notification and the identity information, in the conversion unit 5, the USB / control bus conversion software 23 outputs the link permission request data to the head unit 2 via the control bus 10 (step S11b). At the same time, the identity information is written in a buffer (not shown) (step S
13b).

Further, the head unit 2 transmits a confirmation notice for confirming from which device the link permission request is transmitted through the control bus 10 (step S11c). In response to the confirmation notification, the conversion unit 5 outputs the CDC (virtual CDC) identity information based on the information written in the buffer (step S15b). As a result, the head unit 2 recognizes that the CDC is connected through the control bus 10, creates an address to be assigned to the CDC (virtual CDC), and transmits this address to the conversion unit 5 through the control bus 10 (step S1
3c). In the conversion unit 5, the USB / control bus conversion software 23 returns the assigned address to the head unit 2 (step S17).
b), the control bus control software 24 of the head unit 2 receives this, and sends a link end notification to the conversion unit 5 (step S15c). This completes the initial link operation.

[Time Polling Operation] Next, the time polling operation performed for maintaining the connection state between the head unit 2 and the conversion unit 5 after the initial link operation will be described. FIG. 7 is a flow chart for explaining the time polling operation. After the initial link operation is performed, the control bus control software 24 of the head unit 2 transmits a status confirmation notice to the conversion unit 5 (step S2).
1c). In response to this, in the conversion unit 5, the USB /
The control bus conversion software 23 reads the status data set from the notebook PC 3 and already written in the buffer, and returns this status data to the head unit 2 (step S2).
1b). Further, thereafter, the control bus control software 24 of the conversion unit 5 similarly repeats the status confirmation notification transmission processing (processing of step S21c) every 600 ms. Here, the control bus control software 24 is configured to disconnect the linked device from the system if the status data is not returned three times.
The B / control bus conversion software 23 returns the status data written in the buffer in response to the inquiry from the head unit 2, so that the connection between the head unit 2 and the conversion unit 5 is maintained. It In this case, it is not necessary to inquire the status with respect to the notebook PC 3, and the time required for returning the status data is shortened. The details of this process will be described later.

[Operation for User Operation] Next, an operation for user operation for transmitting data from the notebook PC 3 to the head unit 2 in response to an operation performed by the user on the head unit 2 will be described. Figure 8
6 is a flowchart for explaining an example of a user operation corresponding operation. By continuously performing the time polling operation of the head unit 2 and the conversion unit 5,
When the user presses, for example, an AMS (Auto Music Search) button of the head unit 2 in a state where the connection with the connection is maintained, the control bus control software 24 detects the user's operation, and the U via the control bus 10.
A predetermined command (AMS + command) is output to the SB / control bus converter 14 (step S31).
c). In the USB / control bus conversion unit 14, US
The command input by the B / control bus conversion software 23 is the USB / control bus conversion unit 14.
In step S31b, it is determined whether or not the command is a command to respond. Here, the input command is US
If the B / control bus conversion unit 14 determines that the command is not a response, then the USB /
The control bus conversion software 23 writes the command frame of the control bus 10 in the data portion of the USB data frame (step S33b). Further, the USB / control bus conversion unit 14 writes the USB command frame in which the ten command frames of the control bus are written in this way to the notebook PC 3
To (step S35b). In the notebook PC 3, the USB / control bus conversion device driver 28 recognizes that the data portion of the USB data frame is the command frame of the control bus 10 (step S31a) and decodes the command of the control bus 10 (step S31a). S33a).

Further, the USB / control bus conversion device driver 28 outputs the decoded control bus command to the virtual CDC software 21 (step S35a), and the virtual CDC software 21 executes this control bus command (step S35a). S37a). In this example, since the control bus command is the AMS + command, the virtual CDC software 21 performs the interlace operation with respect to the track next to the track being reproduced and reproduces the music data of the next track. . That is, here, the music data consisting of the compressed audio data of the next track is decoded by the virtual CDC software 21 and has a PCM (Pulse Code) having a USB data frame.
Modulation) format data, USB cable 4
Through the conversion unit 5 (step S39).
a). The general-purpose USB hub driver 27 and the USB audio device driver 2 of the notebook PC 3
6 is a USB hub 12 and a USB / DA converter 13
The PCM format data output from the notebook PC 3 is controlled by the USB / DA converter 13 (step S37b) and further transmitted to the head unit 2 via the audio cable 6. , Is reproduced on the car audio device (step S32c). Also, in this case, the virtual CD
The C software 21 outputs data such as track data and song title data to the USB / control bus conversion device driver 28. These data are US
It is made a part of the B data frame, and the USB / control bus conversion device driver 28
It is output to the SB / control bus converter 14 (step S39a). This USB data frame is
The USB / control bus conversion unit 14 converts the control bus command into a control bus command (step S37b) and outputs the control bus command to the head unit 2. In the head unit 2,
Based on this control bus command, the control bus control software 24 displays track data, song title data, etc. on the display unit or the like (step S32c).

Next, the audio system 1 as described above.
The details of the USB / control bus conversion software 23 for realizing the above operation will be described. Figure 9 shows the USB /
3 is a software block diagram showing a hierarchical structure of control bus conversion software 23. FIG. The USB / control bus conversion software 23 is provided in the USB / control bus conversion unit 14 in order to realize the operation of the audio system 1 as described above.
To the USB bus 31 connected to the control bus 10 and the serial port 32 connected to the control bus 10, or the serial port 3
It has a function of outputting a response notification to the command input from the serial port 32. Each block in the hierarchical structure shown in FIG. 9 indicates a function of the USB / control bus conversion software 23, and blocks having surfaces contacting each other have an interface, that is, data can be exchanged. And

FIG. 10 shows the data flow in the USB / control bus conversion software 23. It should be noted that in FIG. 10, a rectangular block represented by a single line represents each processing unit corresponding to the above-described software hierarchical structure, and a rectangular block represented by a double line is associated with the processing by the single line block. Represents a buffer for temporarily recording data transferred between blocks. First,
A data flow when the USB data frame is transmitted from the notebook PC 3 in the USB / control bus conversion software 23 will be described with reference to FIG. The USB data frame transmitted from the notebook PC 3 through the USB cable 4 is subjected to a reception process in the USB reception processing unit B1 of the software. The data received by the USB reception processing unit B1 is recorded in the reception USB data frame buffer Bd1 each time a USB data frame is received.

Reception USB data frame buffer Bd1
The USB data frame written to
It is read by the reception filter unit B2. That is, U
The SB reception filter unit B2 performs reading when a USB data frame exists in the reception USB data frame buffer and divides it into meaningful data units.
(Hereinafter, the data thus divided will be referred to as USB command status.)

Then, the USB reception filter unit B2 indicates that this USB command status is
If it is a command to be transmitted to 0 (hereinafter referred to as control bus command status), the USB reception filter unit B2 records it in the transmission request control bus command buffer Bd3. USB
When the command status includes status data that should immediately respond to a request from the head unit 2 in the conversion unit 5, like the status data used in the above-mentioned time polling operation, such status data is set value buffer Bd2. Record against. The status data recorded in the set value buffer Bd2 is read by the control bus filter unit B3 in order to immediately respond to the request from the head unit 2 in the conversion unit 5, as described later.

Further, the control bus filter section B3
Is the transmission request control bus command buffer Bd3.
When there is data in, the data is acquired and converted into a control bus command frame,
Transmission control bus command frame buffer Bd4
To record. The control bus filter unit B3 is
At the same time, it outputs a control bus command transmission request to the port setting unit B4. Upon receiving the control bus command transmission request, the port setting unit B4 sets the serial port 32 to a state in which serial transmission is possible. further,
The SCI transmission processing unit B5 reads data from the transmission control bus command frame buffer Bd4 when the serial port 32 is in a transmittable state, and transmits this data from the serial port 32 byte by byte. As described above, from the notebook PC 3 to the US
The USB data frame output through the B cable 4 can be output to the control bus 10.

Next, a process in which the USB / control bus conversion software 23 outputs a command input from the control bus 10 to the notebook PC 3 as a USB data frame will be described with reference to FIG.
USB / control bus conversion software 2 when serial data is input from the control bus 10
The SCI reception processing unit B6 of No. 3 receives the serial data output from the control bus 10 by controlling the port setting unit B4 to make the serial port 32 ready for reception. Then, the SCI reception processing unit B6
A command frame is created based on this received data, and this command frame is recorded in the reception control bus command frame buffer Bd5.

Further, the control bus filter unit B3
Is the receive control bus command frame buffer B
If a control bus command frame exists at d5, this is acquired and command analysis is performed. As a result of the analysis, when this command is a command to be sent to the notebook PC 3, the control bus filter unit B3 creates a transmission USB data frame whose data is the control bus command frame, and transmits this transmission USB data frame. Write to the data frame buffer Bd6. Further, the USB transmission processing unit B7 of the USB / control bus conversion software 23, if there is data in the transmission USB data frame buffer Bd6, sends this to the U
It is set in a memory (not shown) assigned for the SB controller, and a transmission USB data frame is transferred from this memory to the notebook PC 3. After the transfer is completed, the USB transmission processing unit B7
Erases the data recorded in the memory. From the above, the command input from the control bus 10
It can be output to the notebook PC 3 as a USB data frame.

Next, a process in which the USB / control bus conversion software 23 responds to a command input from the control bus 10 through the control bus 10 will be described with reference to FIG. When serial data is input from the control bus 10, the USB
The SCI reception processing unit B6 of the / control bus conversion software 23 controls the port setting unit B4 to bring the serial port 32 into a receivable state. Then, in this state, the serial data output from the control bus 10 is received, a command frame is created based on this received data, and this command frame is recorded in the reception control bus command frame buffer Bd5. Further, the control bus filter unit B3
Is the receive control bus command frame buffer B
If a control bus command frame exists at d5, this is acquired and command analysis is performed. As a result of the analysis, when this command is a command that needs to respond by referring to the set value recorded in the above-mentioned set value buffer Bd2, the control bus filter unit B3 sets the setting recorded in the set value buffer Bd2. Acquire the value, create a send control bus command frame, and
This is written in the transmission control bus command frame buffer Bd4. At the same time, the control bus filter unit B3 outputs a control bus command transmission request to the port setting unit B4. Upon receiving the control bus command transmission request, the port setting unit B4 sets the serial port 32 to a state in which serial transmission is possible.

Further, the SCI transmission processing unit B5 reads out data from the transmission control bus command frame buffer Bd4 when the serial port 32 is in a transmittable state and transmits this data from the serial port 32 byte by byte. To do. As described above, the setting value written in the setting value buffer Bd2 is used for a command or status for which a timely severe response is required, without making an inquiry to the notebook PC 3 or the like.
It becomes possible to respond quickly.

Next, a specific example of the processing in the above USB / control bus conversion software 23 will be described. (1) Time polling process This process is performed for a device connected to the control bus 10 at a fixed cycle (600
This is a process for the software to respond to a command sent in ms) and corresponds to the process of the USB / control bus conversion unit 14 in the above-mentioned timing polling operation. When a time polling command (command relating to status confirmation notification) is transmitted from the head unit 2 through the control bus 10, the SCI reception processing unit B
6 receives this and creates a time polling command frame, and records this time polling command frame in the reception control bus command frame buffer Bd5. At the same time, the SCI reception processing unit B6
Outputs a transmission data reception confirmation (1 byte) to the SCI transmission processing unit B5. In the SCI transmission processing unit B5,
Control bus 10 for confirmation of input transmission data reception
Through the head unit 2.

On the other hand, the control bus filter section B3
Is the receive control bus command frame buffer B
A time polling response command status is created by acquiring the time polling command frame from d5, analyzing this command, and further acquiring the set value from the set value buffer Bd2. Then, the control bus filter unit B3 records this response command status in the transmission control bus command frame buffer Bd4. The SCI transmission processing unit B5 transmits the response command status recorded in the transmission control bus command frame buffer Bd4 to the head unit 2 through the control bus 10. When the transmission data reception confirmation or the response command / status is transmitted to the head unit 2 as described above, the timing detection unit B8 (see FIG. 10).
At, the polling request output possible timing is detected and the polling request output possible timing is output to the port setting unit B4. Then, the port setting unit B4 sets the serial port 32 in a state in which it is possible to output the transmission data reception confirmation and the like based on this polling request output possible timing.

(2) Music reproduction processing This processing is performed when a command is transmitted from the head unit 2 to the notebook PC 3 as the user performs a music reproduction start operation on the head unit 2.
This is a process performed in the SB / control bus conversion unit 14, and corresponds to another example of the above-described user operation corresponding operation. When a music reproduction command is transmitted from the head unit 2 through the control bus 10, the SCI reception processing unit B6 receives this and creates a music reproduction command frame, and the music reproduction command frame is received in the reception control bus command frame buffer Bd5. Record against.
At the same time, the SCI reception processing unit B6 outputs a transmission data reception confirmation (1 byte) to the SCI transmission processing unit B5. On the other hand, the control bus filter unit B3 acquires the music reproduction command frame from the reception control bus command frame buffer Bd5 and analyzes this command. As a result, since this command is analyzed to be transferred to the notebook PC 3, the control bus filter unit B3 converts this music reproduction command frame into a USB data frame and further transmits the USB data frame. The data is recorded in the buffer Bd6. The USB data frame relating to music reproduction recorded in the transmission USB data frame buffer Bd6 is U
The data is transferred to the notebook PC 3 by the SB transmission processing unit B7.

As described above, in the present embodiment, in the notebook PC 3 whose lid 3a is opened and closed, the notebook PC 3 is provided when the lid 3a is closed.
Even if is in the sleep state, by connecting the USB cable 4 to the USB connector 11, the general-purpose microcomputer 17 of the notebook PC 3 transits from the sleep state to the active state, and maintains this active state. It is like this. Therefore, only by connecting the USB cable 4, the virtual CDC software 21
Can be operated to read data from the notebook PC 3 with the lid 3a in the suspended state closed, and reproduce the data on the car audio device side. Therefore, when the notebook PC 3 is brought into an automobile for use, the power consumption thereof can be reduced and the operating time by the battery can be prolonged. As described above, music data stored as compressed audio data can be obtained by simply bringing the notebook PC 3 into the car and connecting it to the head unit 2 of the car audio device via the USB cable 4, the conversion unit 5, and the like. Can be easily reproduced on the car audio device side.

Therefore, it is possible for the notebook PC 3 to decode and listen to the music, which is the compressed audio data stored in the notebook PC 3, and the user can
When listening to music from compressed audio data, it is not necessary to prepare an audio device equipped with a decoder LSI for each listening situation. As a result, the total cost for the user can be reduced and the environmental load can be reduced. Further, since the notebook PC 3 can be used with the lid portion 3a closed, the notebook PC 3 can be used by connecting it to the head unit 2 while keeping it in the seat pocket or bag of an automobile. Therefore, it is easy to use in a small space in the automobile, and the usability for the user can be improved. Moreover, since the user does not need to write music data to many storage media in order to listen to music in various situations, usability can be improved by the user.

Further, in the present embodiment, the head unit 2 is operated to output a control bus command from the head unit 2, and the control unit 5 outputs the control bus command to the US.
In order to operate the notebook PC 3 by outputting it as a B data frame to the notebook PC 3, and to output the reproduction data from the notebook PC 3 to the car audio device side, the notebook P
Even if the lid portion 3a of C3 remains closed, the notebook PC 3 can be operated from the head unit 2, and there is no inconvenience caused by keeping the lid portion 3a closed. Further, in the present embodiment, US
Notebook PC depending on whether B cable 4 is connected or not
Since the connection between the head unit 2 and the head unit 2 is detected, it is possible to easily detect that the notebook PC 3 is connected to the head unit 2.

Furthermore, the notebook type P of the present embodiment
Unlike conventional notebook PCs, C3 has a lid 3a.
Since it is not necessary to open the window to input from an input device such as a dedicated keyboard and to see the output result on a display, it is not necessary to use it in a limited place such as a desk, which is convenient for the user.

It should be noted that, in the above-described embodiment, other configurations may be adopted without departing from the spirit of the present invention. For example, in the above embodiment, the notebook PC 3 and the conversion unit 5 are connected to each other via the USB cable 4
Was connected with, but is not limited to this, IEEE13
Other buses such as 94 may be used. In addition, the notebook PC 3 and conversion unit 5
You may make a wireless connection using a tooth, a wireless LAN, or the like.

In the above embodiment, the conversion unit 5 is an independent unit, but the present invention is not limited to this. The conversion unit 5 may be built in the head unit 2 or the notebook PC 3 It can also be built into.

Further, in the above-described embodiment, the music data is stored in the hard disk of the notebook PC 3, but the internal storage means of another form,
Alternatively, music data may be stored in an external storage means such as a CD-R, MD, or memory card. Also, instead of the notebook PC 3, a PDA (Personal Dig
Other foldable computer devices having an opening / closing mechanism such as an ital assistant) and a mobile phone may be adopted. Furthermore, in the above-described embodiment, the virtual CDC software 21 is activated with the lid 3a of the notebook PC 3 closed, but the present invention is not limited to this, and other applications may be used for the notebook PC.
You may make it use with the lid part 3a of 3 closed.

Furthermore, in the above-described embodiment, the music data stored in the notebook PC 3 is transferred to the head unit 2.
It was supposed to be played on the side, but it is not limited to this,
The present invention may be applied to reproduction of video data and the like stored in the notebook PC 3. Further, in the above-described embodiment, a car navigation device, another audio device or an audio / visual device can be adopted instead of the car audio device as the data reproducing device. Other than this, the configurations described in the above embodiments can be selected or changed to other configurations without departing from the spirit of the present invention.

[0057]

As described above, according to the present invention,
When a user reproduces data in various situations, many built-in LSIs and storage media are not required,
As a result, the cost for the user can be reduced. Further, in this case, since the computer device can be used while being closed, the usability for the user can be improved.

[Brief description of drawings]

FIG. 1 is an external view showing an overall configuration of an audio system according to an embodiment of the present invention.

2 is a block diagram of the audio system shown in FIG. 1. FIG.

FIG. 3 is a block diagram showing an internal configuration of the notebook PC shown in FIG.

FIG. 4 is a software block diagram of the audio system shown in FIG.

FIG. 5 is a notebook type P when performing an initial link operation in the audio system shown in FIGS.
It is a software block diagram for showing operation of C.

FIG. 6 is a flowchart showing processing contents of initial link operation in the entire audio system.

FIG. 7 is a flowchart showing the processing contents of the time polling operation of the same.

FIG. 8 is a flowchart showing the processing contents of an operation (an operation corresponding to a user operation) based on an input operation of the user's head unit.

9 is a hierarchical structure diagram of the USB / control bus conversion software shown in FIG.

FIG. 10 is a functional block diagram of the same.

[Explanation of symbols]

1 ... Audio system (data reproduction system), 2 ...
Head unit, 3 ... Notebook type PC (computer device), 3a ... Lid part, 4 ... USB cable (input / output interface cable), 5 ... Conversion unit, 10 ...
Control bus, 11 ... USB connector, 12 ... US
B hub, 13 ... USB / DA converter, 14 ... USB
/ Control bus converter, 16 ... USB host controller, 17 ... General-purpose microcomputer, 20 ... State management software, 21 ... Virtual CDC software, 22 ... USB device driver, 23 ... USB / control bus conversion software, 24 ... Control bus control software , 26 ... USB audio device driver, 27 ...
General-purpose USB hub driver, 28 ... USB / control bus conversion device driver

Claims (9)

[Claims] 1. A computer device for storing predetermined record data and reading and outputting the record data, and a reproducing device which is connectable to the computer device and reproduces the record data outputted from the computer device. A device, the computer device has an opening / closing mechanism for opening and closing the computer device, operates when the opening / closing mechanism is opened, and functions to enter a sleep state when the opening / closing mechanism is closed; and The data reproducing system, wherein the computer device transitions from a sleep state to an active state when detecting that the computer device and the reproducing device are connected in a state where the opening / closing mechanism is closed. 2. The reproduction device includes an operation unit for a user to perform an operation, and when the reproduction device and the computer device are connected to each other, an input operation in the operation unit is used as a control signal for the computer. Outputting to the playback device, based on the control signal input to the computer device, when the computer device is in an active state. Claim 1
The described data reproduction system. 3. The computer apparatus maintains the active state after detecting that the computer apparatus and the reproducing apparatus are connected and transitioning from the sleep state to the active state. The described data reproduction system. 4. The notebook computer (Pers PC) having a lid portion which is opened and closed by the opening and closing mechanism.
The data reproducing system according to claim 1, which is an onal computer). 5. The computer device and the reproducing device are connected via an input / output interface cable of the computer, and the computer device and the reproducing device are connected depending on whether the input / output interface cable is connected or not. The data reproducing system according to claim 1, wherein the data reproducing system detects that the device is connected. 6. A computer device for storing predetermined record data, reading the record data and outputting the record data, and a reproduction device connected to the computer device and having an operation unit for a user to operate. The playback device outputs a control signal to the computer device based on an input operation on the operation unit, and the computer device is formed to be openable and closable, and in the closed state, the control output from the playback device. A data reproduction which receives a signal and transmits the recording data to the reproducing device based on the received control signal, and the reproducing device reproduces the recording data output from the computer device. system. 7. Storage means for storing predetermined data,
A computer device comprising a data reading device for reading and outputting the data stored in the storage device, the sleep device for putting the computer device into a sleep state based on a predetermined condition, and the computer device. Connection detection means for detecting that another device is connected and outputting a detection signal, wherein the data reading means reads the data based on the detection signal regardless of the predetermined condition. A computer device characterized in that the output is performed as 8. The computer device has a display, the display is formed to be openable and closable, and the predetermined condition is that the display is in a closed state. 7. The computer device according to 7. 9. The computer device according to claim 7, wherein the other device is an in-vehicle device mounted in an automobile.