JP2011040030A - Cradle for portable content playback apparatus - Google Patents

Cradle for portable content playback apparatus Download PDF

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Publication number
JP2011040030A
JP2011040030A JP2009262504A JP2009262504A JP2011040030A JP 2011040030 A JP2011040030 A JP 2011040030A JP 2009262504 A JP2009262504 A JP 2009262504A JP 2009262504 A JP2009262504 A JP 2009262504A JP 2011040030 A JP2011040030 A JP 2011040030A
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switch
connected
hub
controller
dap
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JP2009262504A
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JP5180943B2 (en
Inventor
Masatoshi Nakabo
真敏 中坊
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Onkyo Sound & Vision Corp
オンキヨーサウンド&ビジョン株式会社
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Priority to JP2009168079 priority
Application filed by Onkyo Sound & Vision Corp, オンキヨーサウンド&ビジョン株式会社 filed Critical Onkyo Sound & Vision Corp
Priority to JP2009262504A priority patent/JP5180943B2/en
Priority claimed from EP10157164A external-priority patent/EP2276025A1/en
Publication of JP2011040030A publication Critical patent/JP2011040030A/en
Publication of JP5180943B2 publication Critical patent/JP5180943B2/en
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Abstract

PROBLEM TO BE SOLVED: To charge DAP2 even when a charge command is not transmitted to DAP2 from a host controller 3A of PC3.
A DAP2 executes a charging operation when a command is received from a host controller, and does not execute a charging operation when a command is not received from the host controller. When the switch 1E connects the connector 1J and the host controller 1B, the host controller 1B sends a command to the DAP 2 to charge the DAP 2. When the switch 1E connects the connector 1J and the hub 1C, the host controller 3A of the PC 3 sends a command to the DAP 2 to charge the DAP 2.
[Selection] Figure 2

Description

  The present invention relates to a cradle for a portable content player.

  A PC or a portable content playback apparatus (hereinafter referred to as DAP) includes a recording medium such as an HDD, can record an audio file in the HDD, and can play back the audio file recorded in the HDD. (1) When playing back an audio file recorded on the PC and listening to the audio, the PC is connected to the amplifying apparatus by a user operation. The PC decodes the audio file, transmits the audio data to the amplifying device, and the sound is reproduced by the amplifying device. (2) When an audio file recorded on the PC is transferred to the DAP and recorded, the PC and the DAP are connected via a USB cable by a user operation. The PC transfers the audio file recorded on the HDD to the DAP, and the DAP records the transferred audio file on the HDD. (3) When playing back an audio file recorded in the DAP and listening to the audio, the DAP is connected to the cradle by a user operation, and the cradle is connected to the amplification device (for example, Patent Document 1 below). The DAP decodes the audio file, transmits the audio data to the amplification device via the cradle, and the sound is reproduced by the amplification device. In order to execute the above operations (1) to (3), it is necessary to connect and disconnect the PC, DAP, cradle, and amplifying device each time by user work, which is very complicated. is there.

  On the other hand, the DAP is connected to a PC or a cradle via USB, and charges a battery when a charging voltage is supplied from the PC or the cradle. In the DAP, the battery is charged with a charging voltage when a charge command is supplied from the host controller at predetermined time intervals via the USB data lines D + and D−, and the charge command is received from the host controller for a predetermined time. Some do not charge the battery when not supplied at intervals. Therefore, when the PC is turned off, the charging voltage is supplied from the PC to the DAP, but the charging command is not supplied from the PC to the DAP. Therefore, the DAP cannot charge the battery.

JP 2006-244607 A JP 2007-68333 A

  An object of the present invention is to provide a cradle for a portable content playback device that can charge the portable content playback device even when a command is not transmitted from the host controller of the computer to the portable content playback device.

  A cradle according to a preferred embodiment of the present invention performs a charging operation when a command is received from a controller, and a power supply voltage for charging a portable content player that does not perform a charging operation when a command is not received from the controller. A first connection unit to which the portable content player can be connected, a second connection unit to which a computer having a second controller can be connected, an output unit for outputting content data, Connecting a first controller for controlling a portable content playback device, the second connection unit, a first switch and a hub connected to the second switch, the first connection unit and the first controller; Alternatively, the first switch for switching whether to connect the first connection unit and the hub, the output unit, and the first The second switch for switching whether to connect a controller, or to connect the output unit and the hub, and a switch control unit for switching and controlling the first switch and the second switch. When the control unit connects the first connection unit and the first controller to the first switch, the first controller transmits a command to the portable content player, and the switch control unit transmits the first switch. When the first connection unit and the hub are connected to each other, the second controller transmits a command to the portable content playback device.

  When the first switch connects the first connection unit and the first controller, the portable content player is not connected to the computer, but is connected to the first controller in the cradle. Therefore, when the first controller transmits a command to the portable content playback device, the portable content playback device can perform charging. On the other hand, when the first switch connects the first connection unit and the hub, the portable content player is not connected to the first controller, but is connected to the second controller in the computer. Therefore, when the second controller transmits a command to the portable content playback device, the portable content playback device can perform charging.

  In a preferred embodiment, the hub outputs a light emission control signal for controlling light emission of the light emitting element when it is detected that the portable content playback device and the computer are connected to the hub, When the switch control unit determines whether the portable content player and the computer are connected to the hub based on a light emission control signal output from the hub, and determines that they are not connected In addition, the first switch and the first controller are connected to the first switch.

  When the hub detects that the portable content playback device and the computer are connected to the hub and notifies the switch control unit to that effect, by using the light emission control signal, the hub separately sends it to the switch control unit. There is no need to output a dedicated signal for notification. Therefore, the configuration of the hub can be simplified.

  In a preferred embodiment, the light emission control signal output from the hub is a PWM signal, the light emission control signal is integrated, and the first is performed when the portable content playback apparatus and the computer are connected to the hub. An integration circuit that generates a control signal that is a second level when the portable content playback device and / or the computer is not connected to the hub and supplies the control signal to the switch control unit, The switch control unit determines whether or not the portable content playback device and the computer are connected to the hub based on a control signal supplied from the integration circuit.

  Even if the PWM signal is input, the switch control unit cannot determine whether the portable content playback apparatus and the computer are connected to the hub. Therefore, the integration circuit integrates the PWM signal to generate a high level or low level signal, so that the switch control unit can connect the portable content playback device and the computer to the hub based on the high level or low level signal. It can be determined whether or not it is connected.

  In a preferred embodiment, when content data from the portable content playback device is received and output from the output unit, the switch control unit connects the first connection unit and the first controller to the first switch. And when the output unit and the first controller are connected to the second switch, content data from the computer is received and output from the output unit, the switch control unit includes the second switch. When the output unit and the hub are connected to each other and the content file from the computer is transferred to the portable content playback device and recorded, the switch control unit causes the first switch to connect the first connection unit and the hub. Connect the hub.

  When outputting content data from the portable content playback device from the output unit, the first switch connects the first connection unit and the controller, and the second switch connects the output unit and the controller. Accordingly, content data from the portable content playback device is output from the output unit via the first connection unit, the first switch, the controller, and the second switch. When outputting content data from the computer from the output unit, the second switch connects the output unit and the hub. Therefore, content data from the computer is output from the output unit via the second connection unit, the hub, and the second switch. When a content file from a computer is transferred to a portable content player and recorded, the first switch connects the first connection unit and the hub. Therefore, the content file from the computer is transferred and recorded to the portable content player via the second connection unit, the hub, the first switch, and the first connection unit. In this way, it is not necessary to connect and disconnect a plurality of devices by the user's work.

  In a preferred embodiment, the apparatus further comprises connection determination means for determining whether or not the computer is connected to the second connection unit, and an instruction to transfer and record a content file from the computer to the portable content playback device When it is determined that the computer is not connected to the second connection unit, the switch control unit does not connect the first connection unit and the hub to the first switch.

  If a computer is not connected to the second connection unit and the first switch connects the first connection unit and the hub, commands cannot be transmitted from the first controller and the second controller to the portable content playback device. However, in this example, this problem can be solved.

  A cradle according to another preferred embodiment of the present invention performs charging for a portable content player that performs a charging operation when a command is received from a controller and does not perform a charging operation when the command is not received from the controller. A first connection unit to which the portable content playback device can be connected, a second connection unit to which a computer including a second controller can be connected, and the portable content playback device. A first controller that controls, the first switch that switches between connecting the first connection unit and the first controller, or connecting the first connection unit and the second connection unit, and A switch control unit that controls switching of the first switch, and the switch control unit connects the first switch to the first connection unit. When the first controller is connected, the first controller transmits the command to the portable content playback device, and the switch control unit transmits the first connection unit and the second connection unit to the first switch. The second controller transmits the command to the portable content player.

  When the first switch connects the first connection unit and the first controller, the portable content player is not connected to the computer, but is connected to the first controller in the cradle. Therefore, when the first controller transmits a command to the portable content playback device, the portable content playback device can perform charging. On the other hand, when the first switch connects the first connection unit and the second connection unit, the portable content player is not connected to the first controller, but is connected to the second controller in the computer. Therefore, when the second controller transmits a command to the portable content playback device, the portable content playback device can perform charging.

  A connection detection method according to a preferred embodiment of the present invention provides a light emission control signal for controlling light emission of a light emitting element when the hub detects that a portable content playback apparatus and a computer are connected to the hub. And the light emission control signal is integrated, and is at the first level when the portable content playback device and the computer are connected to the hub, and the portable content playback device and / or the computer Generating a control signal that is at a second level when is not connected to the hub; and when the control signal is at the first level, the portable content playback device and the computer are connected to the hub When the control signal is at the second level, the portable content playback device is Beauty / or the computer and the step of determining that it is connected to the hub.

  When the hub detects that the portable content playback device and the computer are connected to the hub and notifies the switch control unit to that effect, by using the light emission control signal, the hub separately sends it to the switch control unit. There is no need to output a dedicated signal for notification. Therefore, the configuration of the hub can be simplified.

  ADVANTAGE OF THE INVENTION According to this invention, even when a command is not transmitted to the portable content playback apparatus from the host controller of a computer, the cradle of the portable content playback apparatus which can charge a portable content playback apparatus can be provided.

It is a block diagram which shows the cradle 1 grade | etc., Of this invention. It is a block diagram which shows hardware, such as a cradle. 1 is an external view of a cradle 1. FIG. It is a circuit diagram which shows microcomputer 1A, hub 1C, and an integration circuit. It is a figure which shows the A point waveform and B point waveform in FIG. It is a figure which shows the A point waveform and B point waveform in FIG. It is a figure which shows the C point waveform and D point waveform in FIG. It is a figure which shows the C point waveform and D point waveform in FIG. It is a flowchart which shows the process of the microcomputer 1A. It is a flowchart which shows the process of the microcomputer 1A. It is a flowchart which shows the process of the microcomputer 1A. It is a block diagram which shows the cradle 1 etc. of another Example of this invention. It is a block diagram which shows the cradle 1 etc. of another Example of this invention.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings. However, the present invention is not limited to these embodiments. FIG. 1 shows a cradle 1, a portable content playback apparatus (hereinafter referred to as DAP (Digital Audio Player)) 2, a computer (hereinafter referred to as PC) 3, an amplification apparatus 4, and remote control transmitters 5 and 6 according to the present embodiment. FIG. The DAP 2 and the PC 3 can be connected to the cradle 1 via an arbitrary communication line such as a USB (Universal Serial Bus). Note that IEEE 1394, HDMI, or the like may be employed instead of USB. The cradle 1 can be connected to the amplifying device 4 via a digital audio cable and a control signal cable.

  The cradle 1 causes the DAP 2 to charge the battery by supplying a DC power supply voltage to the DAP 2. The DAP 2 performs charging of the battery when receiving a charging command from the host controller via the USB at predetermined time intervals, and does not charge the battery when not receiving the charging command from the host controller via the USB. . Therefore, the cradle 1 must continue to transmit a charging command from the host controller to the DAP 2 at predetermined time intervals in order to continuously charge the DAP 2.

  Each of the DAP 2 and the PC 3 reproduces (decodes) an audio file recorded on a recording medium such as a built-in HDD or flash memory, and transmits the audio data to the cradle 1 via the USB. The cradle 1 transmits the audio data received from the DAP 2 or the PC 3 to the amplification device 4. The amplifying device 4 reproduces (DA conversion and amplification) the audio data received from the cradle 1 and outputs sound from a speaker (not shown) connected externally. The PC 3 transfers the audio file recorded on its own HDD to the cradle 1, the cradle 1 transfers the audio file from the PC 3 to the DAP 2, and the DAP 2 records the transferred audio file on its own HDD (this The process is sometimes called synchronization).

  When receiving a remote control signal from the remote control transmitter 5 in response to a user operation, the amplification device 4 transmits a control signal (for example, a control signal for starting reproduction of the DAP 2) to the cradle 1. When the cradle 1 receives the control signal from the amplification device 4, the cradle 1 converts the control signal into a control signal for controlling the DAP 2, transmits the control signal to the DAP 2, and controls the DAP 2. The cradle 1 receives a remote control signal from the remote control transmitter 6 or operates an operation unit provided in the cradle 1 according to a user operation, and transmits a control signal to the DAP 2 to control the DAP 2.

  FIG. 2 is a schematic block diagram showing hardware such as the cradle 1. FIG. 3 is an external view of the cradle 1. The cradle 1 includes a microcomputer (switch control means) 1A, a host controller 1B, a USB hub (hereinafter referred to as a hub) 1C, an audio processing unit 1D, switches 1E and 1F, a power supply unit 1G, and a remote control receiving unit. 1H, operation unit 1I, connector (first connection unit) 1J, USB terminal (second connection unit) 1K, digital audio output terminal (hereinafter referred to as output terminal) 1L, and control signal input / output terminal 1M With.

  The microcomputer 1A controls the entire cradle 1 based on a program stored in a memory (not shown). The microcomputer 1A switches the switches 1E and 1F according to a user operation of the operation unit 1I, a remote control signal input to the remote control reception unit 1H, a control signal received from the amplification device 4, a connection state of the DAP2 and the PC3, and the like. Control. The microcomputer 1A is supplied with VBUS (5V DC voltage) from the PC 3 via USB. The microcomputer 1A determines whether or not VBUS is supplied. If VBUS is supplied, it is determined that the PC 3 is connected to the USB terminal 1K and the PC 3 is in a power-on state. If VBUS is not supplied, it is determined that the PC 3 is not connected to the USB terminal 1K or that the PC 3 is in a power-off state.

  The microcomputer 1A is supplied with a connection detection signal from the DAP 2 via the connector 1J. For example, if the connection detection signal is low level, it is determined that DAP2 is connected to connector 1J, and if it is high level, it is determined that DAP2 is not connected to connector 1J.

  The host controller 1B communicates with the DAP 2 via USB and controls the DAP 2. The host controller 1B transmits a charging command to the DAP 2 at predetermined time intervals, and causes the DAP 2 to charge the battery. Therefore, the PC 3 is not connected to the USB terminal 1K, or the PC 3 is in the power-off state, or the switch 1E connects the connector 1J and the host controller 1B to transmit the audio data from the DAP 2 to the amplifying device 4. When the host controller 3A of the PC 3 cannot transmit a charge command to the DAP 2 due to a connection or the like, the host controller 1B can charge the DAP 2 by transmitting a charge command to the DAP 2.

  The host controller 1B is connected to the switches 1E and 1F and the microcomputer 1A. The host controller 1B transmits a control signal from the microcomputer 1A to the DAP 2 and controls the DAP 2. The host controller 1B receives audio data from the DAP 2 and supplies it to the switch 1F.

  The hub 1C connects, in parallel, the DAP 2 on the slave side (downstream side) and the audio processing unit 1D to the PC 3 on the host side (upstream side) via the USB. That is, the hub 1C includes an upstream USB terminal 1K to which the PC 3 can be connected via USB, a downstream connector 1J to which the DAP 2 can be connected via USB, and an audio processing unit 1D that is a downstream USB device. Are connected in the cradle 1. The hub 1C is connected to the switch 1E, the USB terminal 1K, and the audio processing unit 1D.

  As a general function, the hub 1C has a function of detecting whether or not the USB device on the host side and the USB device on the slave side can communicate with each other by connecting USB devices to the host side and the slave side. That is, the hub 1C detects whether or not the DAP 2 is connected to the slave side and the PC 3 that is in the power-on state is connected to the host side, and the host controller 3A of the PC 3 can communicate with the DAP 2. When the hub 1C detects that the DAP 2 and the power-on PC 3 are connected, the hub 1C controls (for example, lights) a light emitting element (hereinafter referred to as an LED), and notifies the user of that fact. On the other hand, when the hub 1C detects that the DAP 2 and / or the PC 3 are not connected, the hub 1C does not light the LED.

  Specifically, as shown in FIG. 4, the output terminal 1Ca of the hub 1C is connected to the anode of the LED 31, and the output terminal 1Cb is connected to the cathode of the LED 31 via the resistor R1. From the output terminals 1Ca and 1Cb, a PWM signal (light emission control signal) for turning on or off the LED 31 is output. FIG. 5 shows waveforms at points A and B when the DAP 2 and / or the PC 3 are not connected to the hub 1C. In FIG. 5, the potential difference between the average voltage at point A and the average voltage at point B is −0.1 V, and the LED 31 is turned off, so that the LED 31 is not lit. FIG. 6 shows waveforms at points A and B when the DAP 2 and the PC 3 in the power-on state are connected to the hub 1C. In FIG. 6, the potential difference between the average voltage at point A and the average voltage at point B is 1.08 V, and the LED 31 is turned on, so that the LED 31 is lit.

  In this example, using the PWM signal (point C waveform) output from the output terminal 1Cb of the hub 1C, information on whether the DAP 2 and the PC 3 in the power-on state are connected to the hub 1C is sent to the microcomputer 1A. Notice. Therefore, it is not necessary to separately output a dedicated signal from the hub 1C for notifying the microcomputer 1A of whether or not the DAP 2 and the power-on PC 3 are connected to the hub 1C. Therefore, the number of output terminals of the hub 1C can be reduced, and the configuration of the hub 1C can be simplified.

  Specifically, as shown in FIG. 4, an integration circuit 32 is connected between the output terminal 1Cb of the hub 1C and the input terminal 1Aa of the microcomputer 1A. Integration circuit 32 includes resistors R2 and R3 and a capacitor C1. One end of the resistor R2 is connected to the output terminal 1Cb, and is connected to the ground potential via the resistor R3. The other end of the resistor R2 is connected to the ground potential via the capacitor C1, and is connected to the input terminal 1Aa of the microcomputer 1A. The PWM signal output from the output terminal 1Cb is integrated by the integrating circuit 32, and a high level or low level signal is generated and supplied to the input terminal 1Aa of the microcomputer 1A.

  The microcomputer 1A cannot detect the PWM signal output from the output terminal 1Cb of the hub 1C. Therefore, the PWM signal is integrated by the integration circuit 32, whereby the PWM signal is converted into a high level signal or a low level signal and supplied to the microcomputer 1A. FIG. 7 shows waveforms at points C and D when DAP 2 and / or PC 3 are not connected to hub 1C. In this case, by supplying a low-level signal to the microcomputer 1A, the microcomputer 1A can determine that the DAP 2 and / or the PC 3 are not connected to the hub 1C. FIG. 8 shows waveforms at point C and point D when DAP 2 and power-on PC 3 are connected to hub 1C. In this case, by supplying a high level signal to the microcomputer 1A, the microcomputer 1A can determine that the DAP 2 and the power-on PC 3 are connected to the hub 1C.

  When the microcomputer 1A receives a low level signal and determines that the DAP 2 and / or the PC 3 are not connected to the hub 1C, the microcomputer 1A connects the connector 1J and the host controller 1E to the switch 1E. Therefore, when the charge command cannot be transmitted from the host controller 3A to the DAP2 because the PC3 is in a power-off state or the PC3 is not connected, the host controller 1B is connected to the DAP2, and the host controller 1B to the DAP2 The DAP 2 can be charged by sending a charging command to.

  The audio processing unit 1D is a downstream device with respect to the hub 1C. The audio processing unit 1D receives audio data from the PC 3 via the hub 1C, converts the audio data into a predetermined format (for example, SPDIF), and supplies the converted data to the switch 1F. The audio processing unit 1D employs a USB audio DAC or the like, and is connected between the hub 1C and the switch 1F. Since the audio processing unit 1D is always connected to the hub 1C, the PC 3 connected to the hub 1C always recognizes the audio processing unit 1D. Therefore, when switching from the state in which the audio data from the DAP 2 is output to the amplifying device 4 to the state in which the audio data from the PC 3 is output to the amplifying device 4, the PC 3 needs to re-recognize the audio processing unit 1D. The audio data from the PC 3 can be output to the amplifying device 4 immediately.

  The switch 1E switches between connecting the connector 1J and the host controller 1B or connecting the connector 1J and the hub 1C based on an instruction from the microcomputer 1A. As the switch 1E, for example, a USB 2.0 compatible high-speed bus switch or the like is employed. The switch 1F switches whether to connect the output terminal 1L and the host controller 1B or to connect the output terminal 1L and the audio processing unit 1D based on an instruction from the microcomputer 1A.

  The power supply unit 1G is supplied with commercial AC power from the power connector shown in FIG. 3, generates a DC power supply voltage from the commercial AC power, supplies it to each part of the cradle 1, and supplies it to the DAP 2 via the connector 1J. The DC power supply voltage supplied to DAP2 is used by DAP2 to charge the battery.

  The remote control receiver 1H receives a remote control signal from the remote control transmitter 6 for the cradle 1 and supplies a control signal to the microcomputer 1A.

  The operation unit 1I receives an instruction based on a user operation. The operation unit 1I includes a DAP button 21 and a PC button 22, which are audio selector switches, a REC button 23, and a power button 24. The DAP button 21 is a button for switching to a state in which the cradle 1 receives audio data from the DAP 2 and outputs it to the amplifying device 4 (hereinafter referred to as a DAP playback state). The PC button 22 is a button for switching to a state where the cradle 1 receives audio data from the PC 3 and outputs it to the amplifying device 4 (hereinafter referred to as a PC playback state). The REC button 23 is a button for switching to a state in which the cradle 1 transfers an audio file from the PC 3 to the DAP 2 and causes the DAP 2 to record the audio file (hereinafter referred to as a recording operation state). The REC button 23 is also a button for canceling the recording operation state. The power button 24 is a button for switching the cradle 1 to a power-on state or a standby state. These buttons are also provided on the remote control transmitter 6.

  The connector 1J can be connected to the connector of the DAP2. The connector 1J includes a USB terminal (data lines D +, D−, and terminals of the 5V power supply line) and a terminal that receives a connection detection signal from the DAP2. The connector 1J is connected to the microcomputer 1A, the switch 1E, and the power supply unit 1G.

  The PC 3 can be connected to the USB terminal 1K via USB. The USB terminal 1K is connected to the hub 1C. The output terminal 1L is connected to the switch 1F, and the digital audio input terminal of the amplifying device 4 can be connected thereto. The output terminal 1L outputs the audio data supplied from the switch 1F to the amplifying device 4.

  The control signal input / output terminal 1M is connected to the microcomputer 1A, and can be connected to the amplifying device 4 via a control signal line. Upon receiving the remote control signal from the remote control transmitter 5 for the amplification device 4, the amplification device 4 transmits a control signal to the control signal input / output terminal 1M. The control signal input / output terminal 1M receives the control signal from the amplifying device 4 and supplies it to the microcomputer 1A. The microcomputer 1A transmits a control signal to the amplifying device 4 via the control signal input / output terminal 1M.

  The DAP 2 includes an HDD 2A, a playback unit 2B, and the like. The playback unit 2B plays back the audio file recorded on the HDD and outputs the audio data to the cradle 1. The PC 3 includes a host controller 3A and an HDD 3B. A general DAP2 and PC3 itself may be employed.

  Hereinafter, the operation of the cradle 1 will be described. FIG. 9 shows the operation of the microcomputer 1A for switching between the DAP playback state and the PC playback state. As an initial state of the switches 1E and 1F, the microcomputer 1A connects the connector 1J and the host controller 1B to the switch 1E, and connects the host controller 1B and the output terminal 1L to the switch 1F. That is, the microcomputer 1A sets the DAP playback state as the initial state. Therefore, audio data from the DAP 2 can be output to the amplifying device 4 via the switch 1E, the host controller 1B, and the switch 1F. Since the connector 1J and the host controller 1B are connected to the switch 1E, even when the PC 3 is not connected or in a power-off state, a charge command is transmitted from the host controller 1B to the DAP 2 and the DAP 2 can be charged.

  In S2 to S5, the microcomputer 1A switches the switches 1E and 1F according to the connection state of the DAP2 and PC3 to the cradle 1. The microcomputer 1A determines whether or not the DAP 2 is connected to the connector 1J by determining whether or not the connection detection signal is supplied from the DAP 2 to the connector 1J (S2). When DAP2 is connected (YES in S2), the microcomputer 1A connects the connector 1J and the host controller 1B to the switch 1E, and connects the host controller 1B and the output terminal 1L to the switch 1F. That is, the microcomputer 1A sets the DAP playback state (S3). Accordingly, audio data from the DAP 2 is output to the amplifying device 4 via the switch 1E, the host controller 1B, and the switch 1F. Thereafter, the process proceeds to S6. In this case, a charge command is transmitted from the host controller 1B to the DAP 2, and the DAP 2 can be charged.

  If DAP2 is not connected (NO in S2), microcomputer 1A determines whether VBUS is supplied from PC3, so that PC3 is connected to USB terminal 1K and PC3 is in a power-on state. It is determined whether there is (S4). When the PC 3 is connected and the power is on (YES in S4), the microcomputer 1A connects the connector 1J and the host controller 1B to the switch 1E, and connects the audio processing unit 1D and the output terminal 1L to the switch 1F. Connect. That is, the microcomputer 1A sets the PC playback state (S5). Accordingly, audio data from the PC 3 is output to the amplifying device 4 via the hub 1C, the audio processing unit 1D, and the switch 1F. Thereafter, the process proceeds to S6. In this case, a charge command is transmitted from the host controller 1B to the DAP 2, and the DAP 2 can be charged. The DAP 2 may be charged by connecting the connector 1J and the hub 1C to the switch 1E and transmitting a charge command from the host controller 3A of the PC 3 to the DAP 2. On the other hand, if the PC 3 is not connected or the PC 3 is in a power-off state (NO in S4), the process proceeds to S6 without switching the switches 1E and 1F (in the initial state).

  In S6 to S13, the microcomputer 1A switches the switches 1E and 1F in response to an instruction to shift to the DAP playback state and an instruction to shift to the PC playback state. The microcomputer 1A determines whether or not an instruction to shift to the DAP playback state has been input (S6). For example, it is determined whether or not the DAP button 21 has been operated. If the instruction to shift to the DAP playback state has not been input (NO in S6), the process proceeds to S10. When an instruction to shift to the DAP playback state is input (YES in S6), the microcomputer 1A determines whether or not the DAP 2 is connected to the connector 1J (S7) as described above. When DAP2 is connected (YES in S7), the microcomputer 1A connects the connector 1J and the host controller 1B to the switch 1E, and connects the host controller 1B and the output terminal 1L to the switch 1F. That is, the microcomputer 1A sets the DAP playback state (S8). Accordingly, audio data from the DAP 2 is output to the amplifying device 4 via the switch 1E, the host controller 1B, and the switch 1F. Thereafter, the process proceeds to S10. In this case, a charge command is transmitted from the host controller 1B to the DAP 2, and the DAP 2 can be charged. On the other hand, when DAP2 is not connected (NO in S7), the microcomputer 1A notifies the user of an error by blinking an LED (not shown) without switching the switches 1E and 1F (S9). For example, when the DAP 2 is not connected in the PC playback state and an instruction to shift to the DAP playback state is input due to an erroneous operation by the user, the audio data from the PC 3 is played back when the transition to the DAP playback state occurs. However, in this example, such a problem can be solved.

  The microcomputer 1A determines whether or not an instruction to shift to the PC playback state has been input (S10). For example, it is determined whether or not the PC button 22 has been operated. If an instruction to shift to the PC playback state is not input (NO in S10), the process proceeds to S14. When an instruction to shift to the PC playback state is input (YES in S10), the microcomputer 1A determines whether the PC 3 is connected to the USB terminal 1K and is in a power-on state, as described above ( S11). When the PC 3 is connected and the power is on (YES in S11), the microcomputer 1A connects the connector 1J and the host controller 1B to the switch 1E, and connects the audio processing unit 1D and the output terminal 1L to the switch 1F. Connect. That is, the microcomputer 1A sets the PC playback state (S12). Accordingly, audio data from the PC 3 is output to the amplifying device 4 via the hub 1C, the audio processing unit 1D, and the switch 1F. Thereafter, the process proceeds to S14. In this case, a charge command is transmitted from the host controller 1B to the DAP 2, and the DAP 2 can be charged. The DAP 2 may be charged by connecting the connector 1J and the hub 1C to the switch 1E and transmitting a charge command from the host controller 3A of the PC 3 to the DAP 2. On the other hand, when the PC 3 is not connected or the PC 3 is in a power-off state (NO in S11), the microcomputer 1A does not switch the switches 1E and 1F, but blinks an LED (not shown) to indicate an error. (S13). For example, when the PC 3 is not connected in the DAP playback state and an instruction to shift to the PC playback state is input due to an erroneous user operation, if the PC playback state is entered, the audio data from the DAP 2 Although playback is interrupted, this problem can be solved in this example.

  Next, the microcomputer 1A determines whether or not the DAP 2 has started playback of audio data based on the playback start notification from the DAP 2 (S14). When the switch 1E connects the connector 1J and the host controller 1B, when the DAP 2 starts reproduction, the host controller 1B can receive the reproduction start notification and transfers it to the microcomputer 1A. When the DAP 2 starts reproduction (YES in S14), the microcomputer 1A connects the host controller 1B and the output terminal 1L to the switch 1F. That is, the microcomputer 1A sets the DAP playback state (S15). Accordingly, audio data from the DAP 2 is output to the amplifying device 4 via the switch 1E, the host controller 1B, and the switch 1F. Thereafter, the process returns to S2. In this case, the DAP2 can be charged by transmitting a charge command from the host controller 1B to the DAP2.

  With the above processing, it is possible to switch between the DAP playback state and the PC playback state without having to execute connection / disconnection of the cradle 1, DAP2, PC3, and amplification device 4 by the user's work. The instruction to shift to the DAP playback state in S6 and the instruction to shift to the PC playback state in S10 are not limited to button operations, but are remote control signals from the remote control transmitter 6 or control signals supplied from the amplifying device 4. May be.

  FIG. 10 shows the operation of the microcomputer 1A that shifts to or cancels the recording operation state. In either the DAP playback state or the PC playback state, the recording operation state can be entered. The microcomputer 1A determines whether or not an instruction to shift to the recording operation state is input (S21). For example, it is determined whether or not the REC button 23 has been pressed for a short time. If the instruction to shift to the recording operation state is not input (NO in S21), the process proceeds to S27. When an instruction to shift to the recording operation state is input (YES in S21), the microcomputer 1A determines whether or not the DAP 2 is connected to the connector 1J (S22) as described above. When the DAP 21 is not connected (NO in S22), the microcomputer 1A notifies the user of an error without connecting the connector 1J and the hub 1C to the switch 1E (S26). That is, the recording operation state is not shifted. When the DAP 2 is connected (YES in S22), the microcomputer 1A determines whether the PC 3 is connected to the USB terminal 1K and the PC 3 is in a power-on state (S23). If the PC 3 is not connected or is in a power-off state (NO in S23), the microcomputer 1A notifies the user of an error without connecting the connector 1J and the hub 1C to the switch 1E (S26). That is, the recording operation state is not shifted. If the PC 1 is not connected or the switch 1E connects the connector 1J and the hub 1C when the power is off, the charging command cannot be transmitted to the DAP 2 and the DAP 2 cannot be charged. Can be solved.

  If PC 3 is connected and the power is on (YES in S23), microcomputer 1A causes switch 1E to connect connector 1J and hub 1C. That is, the microcomputer 1A sets the recording operation state (S24). Therefore, when DAP2 and PC3 communicate via USB, the audio file from PC3 is transferred to DAP2 via hub 1C and switch 1E, and recorded in DAP2. In this case, the charge command cannot be transmitted from the host controller 1B to the DAP 2, but the DAP 2 can be charged by transmitting the charge command from the host controller 3A of the PC 3 to the DAP 2.

  The microcomputer 1A connects the audio processing unit 1D and the output terminal 1L to the switch 1F. That is, the microcomputer 1A sets the PC playback state (S25). Accordingly, audio data from the PC 3 is output to the amplifying device 4 via the hub 1C, the audio processing unit 1D, and the switch 1F. As described above, when the recording operation state is set, the switch 1E connects the connector 1J and the hub 1C, and the audio data of the DAP 2 cannot be received and transmitted to the amplifying device 4. Set automatically. Therefore, the audio data from the PC 3 can be reproduced by the amplifying device 4 while the audio file of the PC 3 is transferred to the DAP 2 and recorded on the DAP 2. That is, the user can record the audio file on the DAP 2 while listening to the audio of the PC 3.

  The microcomputer 1A determines whether or not an instruction to cancel the recording operation state has been input (S27). For example, it is determined whether or not the REC button 23 has been pressed for a long time. If an instruction to cancel the recording operation state is not input (NO in S27), the process returns to S21. When an instruction to cancel the recording operation state is input (YES in S27), the microcomputer 1A connects the connector 1J and the host controller 1B to the switch 1E. That is, the microcomputer 1A cancels the recording operation state so that the PC 3 and the DAP 2 do not communicate with each other via the USB, and the audio file from the PC 3 is not transferred to the DAP 2 (S28). In this case, the DAP2 can be charged by transmitting a charge command from the host controller 1B to the DAP2.

  Even after the recording operation state is released, the switch 1F maintains the connection state between the audio processing unit 1D and the output terminal 1L. Accordingly, when the user transfers the audio file of the PC 3 to the DAP 2 and records it on the DAP 2 while reproducing and listening to the audio data of the PC 3 with the amplification device 4, the recording operation state is canceled and the PC 3 Can be prevented from being reproduced from the amplifying device 4. When audio data from the DAP 2 is reproduced by the amplifying device 4 after the recording operation state is released, in the process of FIG. 9, an instruction to shift to the DAP reproduction state is input in S6, or the DAP 2 starts reproduction in S14 Can be executed.

  Through the above processing, without performing connection / disconnection of the cradle 1, DAP2, PC3, and the amplifying device 4 as user work, switching to the recording operation state and cancellation thereof, switching from the PC playback state to the DAP playback state are performed. Can be executed. Note that the instruction to shift to the recording operation state in S21 and the instruction to cancel the recording operation state in S27 are not limited to button operations, but are remote control signals from the remote control transmitter 6 or control signals supplied from the amplification device 4. May be.

  Here, in the recording operation state, the user disconnects the PC 3 from the USB terminal 1K without inputting an instruction to cancel the recording operation state, or the PC 3 is turned off, or the DAP 2 When a USB communication failure occurs between the PC 1 and the PC 3, the charge command is not supplied to the DAP 2 from the host controller 3 A of the PC 3 even though the switch 1 E is still connected to the connector 1 J and the hub 1 C. DAP2 cannot be charged. Therefore, as shown in FIG. 11, the microcomputer 1A determines whether or not the signal from the integrating circuit 32 is at a high level (S31). That is, the microcomputer 1 determines whether the DAP 2 and the power-on PC 3 are connected to the hub 1C. If not at the high level (NO in S31), the microcomputer 1A connects the connector 1J and the host controller 1B to the switch 1E. Therefore, a charge command is transmitted from the host controller 1B to the DAP 2, and the DAP 2 can be charged.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment. From the viewpoint of solving the problem that the DAP 2 cannot receive the charge command and cannot be charged, the cradle 1 does not have the PC playback state, but has only the DAP playback state and the recording operation state. In this case, as shown in FIG. 12, the cradle 1 may not include the USB hub 1C, the audio processing unit 1D, and the switch 1F. That is, the switch 1E is directly connected to the USB terminal (second connection unit) 1K, and the host controller 1B is preferably connected directly to the output terminal 1L. Further, the cradle 1 may have only the DAP reproduction state and the PC reproduction state without having the recording operation state. In this case, as shown in FIG. 13, the cradle 1 may not include the USB hub 1C and the switch 1E. The cradle 1 may be built in the PC 3 or may be built in the amplification device 4. Also, video data or still image data may be used instead of audio data, and these are collectively referred to as content data. Content data encoded in a predetermined format is called a content file. When the audio processing unit 1D performs DA conversion on the audio data, an analog audio signal is output to the amplifying device 4. Further, the audio processing unit 1 </ b> D may not be built in the cradle 1 and may be connected between the cradle 1 and the amplification device 4. The present invention can also be provided in the form of a computer program for causing a computer to execute the above operations. The portable content playback device may be a mobile phone, a portable car navigation system, a portable TV, a portable CD player, a portable game machine, or the like.

  The present invention can be suitably employed in a cradle of a portable content playback device.

1 Cradle 1A Microcomputer (Switch control means)
1B Host controller 1C USB hub 1D Audio processing unit (downstream device)
1E switch (first switch)
1F switch (second switch)
1G Power supply unit 1H Remote control reception unit 1I Operation unit 1J DAP connection connector (first connection unit)
1L output terminal 1M control signal input / output terminal 2 portable content playback device 3 PC (computer)
3A Host controller 31 LED (light emitting element)
32 Integration circuit

Claims (6)

  1. A cradle that performs a charging operation when a command is received from a controller and supplies a power supply voltage for charging to a portable content playback device that does not execute a charging operation when the command is not received from the controller,
    A first connection unit to which the portable content player can be connected;
    A second connection unit to which a computer having a second controller can be connected;
    An output unit for outputting content data;
    A first controller for controlling the portable content playback device;
    A hub connected to the second connection portion, the first switch and the second switch;
    The first switch for switching between connecting the first connection unit and the first controller or connecting the first connection unit and the hub;
    The second switch for switching between connecting the output unit and the first controller or connecting the output unit and the hub;
    A switch control unit for switching and controlling the first switch and the second switch,
    When the switch control unit connects the first connection unit and the first controller to the first switch, the first controller transmits the command to the portable content player,
    A cradle in which the second controller transmits the command to the portable content playback device when the switch control unit connects the first connection unit and the hub to the first switch.
  2. When the hub detects that the portable content playback device and the computer are connected to the hub, the hub outputs a light emission control signal for controlling light emission of the light emitting element,
    When the switch control unit determines whether the portable content player and the computer are connected to the hub based on a light emission control signal output from the hub, and determines that they are not connected The cradle according to claim 1, further comprising: connecting the first connection unit and the first controller to the first switch.
  3. The light emission control signal output from the hub is a PWM signal,
    The light emission control signal is integrated and is at a first level when the portable content playback device and the computer are connected to the hub, and the portable content playback device and / or the computer is connected to the hub. An integration circuit that generates a control signal at a second level when not being supplied and supplies the control signal to the switch control unit;
    The cradle according to claim 2, wherein the switch control unit determines whether or not the portable content playback device and the computer are connected to the hub based on a control signal supplied from the integration circuit.
  4. When receiving content data from the portable content playback device and outputting from the output unit, the switch control unit connects the first connection unit and the first controller to the first switch, and Connecting the output unit and the first controller to a second switch;
    When the content data from the computer is received and output from the output unit, the switch control unit causes the second switch to connect the output unit and the hub,
    4. When transferring and recording a content file from the computer to the portable content player, the switch control unit connects the first connection unit and the hub to the first switch. A cradle according to any one of the above.
  5. Connection determination means for determining whether or not the computer is connected to the second connection unit;
    When it is determined that the computer is not connected to the second connection unit when an instruction to transfer and record the content file from the computer to the portable content playback device is input, the switch control unit, The cradle according to any one of claims 1 to 4, wherein the first switch and the hub are not connected to the first switch.
  6. A cradle that performs a charging operation when a command is received from a controller and supplies a power supply voltage for charging to a portable content playback device that does not execute a charging operation when the command is not received from the controller,
    A first connection unit to which the portable content player can be connected;
    A second connection unit to which a computer having a second controller can be connected;
    A first controller for controlling the portable content playback device;
    The first switch for switching whether to connect the first connection unit and the first controller or to connect the first connection unit and the second connection unit;
    A switch control unit for switching and controlling the first switch,
    When the switch control unit connects the first connection unit and the first controller to the first switch, the first controller transmits the command to the portable content player,
    A cradle in which the second controller transmits the command to the portable content player when the switch control unit connects the first connection unit and the second connection unit to the first switch.
JP2009262504A 2009-07-16 2009-11-18 Cradle for portable content player Expired - Fee Related JP5180943B2 (en)

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JP2009262504A JP5180943B2 (en) 2009-07-16 2009-11-18 Cradle for portable content player
EP10157164A EP2276025A1 (en) 2009-07-16 2010-03-22 Cradle for portable content playback apparatus and amplifying device to which the same cradle is connected
US12/831,556 US8443127B2 (en) 2009-07-16 2010-07-07 Cradle for portable content playback apparatus and amplifying device to which the same cradle is connected

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