JP4784764B2 - Amplification equipment - Google Patents

Description

  The present invention relates to an amplifying device that amplifies and outputs audio signals transmitted from a plurality of playback devices, and a playback control device that transmits and receives commands to and from the playback devices.

  A system is used in which a plurality of playback devices (CD player, MD recorder, etc.) are connected to a plurality of audio input terminals of the amplification device, and are mutually controlled by transmitting and receiving commands between the amplification device and the playback device. . According to this system, for example, when the power of the amplifying apparatus is turned on, the amplifying apparatus transmits a command to turn on the power to the reproducing apparatus. The playback device turns on the power based on the command. On the other hand, when the playback device starts playback of the content, the playback device transmits a command to “turn on the power and switch the selector” to the amplification device. The amplifying device turns on the power based on the command, and switches the selector to the audio input terminal to which the playback device that has transmitted the command is connected. As described above, when one of the amplifying apparatus and the reproducing apparatus is operated, the other apparatus automatically executes an operation corresponding to the operation of the operator. Therefore, the operator does not need to operate both the amplification device and the reproduction device, and the operation becomes very easy.

  In addition, the commands transmitted and received between the amplification device and the reproduction device are made different depending on the type of device connected to the amplification device. For example, a CD player command is used for control between the amplifying apparatus and the CD player. For the control between the amplifying apparatus and the MD recorder, a command for the MD recorder is used. Therefore, the MD recorder does not operate even when a command for the CD player is received from the amplification device. Therefore, it is possible to prevent the reproduction device connected to the amplification device from performing an erroneous operation.

  Recently, an amplifying apparatus having an operating system (hereinafter referred to as an OS) such as LINUX or Windows (registered trademark) and executing each operation by an application program using the OS has been provided. Such an amplification device is in a standby state in which the OS is read into the RAM of the microcomputer when the power supply is in a standby state, and the application program is not read into the RAM and is not activated. ing. Accordingly, when the start command and the playback command are received from the playback device in the standby state, the amplification device first starts up the OS in the standby state in the RAM according to the start command, and then loads the application program in the RAM. Read and activate. Thereafter, the amplification device switches the selector in response to the reproduction command, so that the audio signal from the reproduction device can be amplified. As described above, it is necessary to start the application program in response to the start command from the playback apparatus, but it takes a considerable time to start. As a result, even though the playback device has started playing the content, the operation of switching the selector in the amplification device has not been completed, and there is a problem that the sound output from the amplification device via the speaker is cut off. is there.

JP 2006-244607 A

  An object of the present invention is to provide an amplifying device and a reproduction control device that can prevent sound interruption even when a start command and a reproduction command are received from a reproduction device in a standby state.

  An amplifying device according to a preferred embodiment of the present invention includes: a command transmitting / receiving unit that transmits / receives a command to / from a reproducing device that reproduces content and transmits an audio signal; a signal receiving unit that receives an audio signal from the reproducing device; Amplifying means for amplifying the audio signal and control means for executing a predetermined operation based on the command. When the amplifying device receives the start command and the playback command from the playback device when the amplification device cannot amplify and output the audio signal from the playback device, the control means pauses the playback operation to the playback device. And a means for transmitting a command for releasing the pause of the reproduction operation to the reproduction apparatus after the amplification apparatus is in a state where it can amplify and output the audio signal from the reproduction apparatus. Have.

  When the amplification device cannot amplify the audio signal, if the start command and the reproduction command are received from the reproduction device, the control means is configured until the amplification device can amplify and output the audio signal from the reproduction device. By sending a command to pause the playback operation to the playback device, the playback operation of the playback device is put on standby. After the amplifying device can amplify and output the audio signal from the playback device, the control means transmits a command to cancel the pause to the playback device, and causes the playback device to start the playback operation. Therefore, when an audio signal is transmitted from the playback device, the amplification device can always amplify and output the audio signal from the playback device, and it is possible to prevent the playback sound from being interrupted. The command to pause the reproduction operation is, for example, a pause command for a CD player or the like, and a stop command for a cassette tape player. The state in which the amplification device cannot amplify the audio signal is, for example, a state in which the program for operating the entire amplification device has not been started, a state in which the amplification circuit is not in operation, a state in which the selector is not switched, Includes meanings such as low power consumption.

  A playback control apparatus according to a preferred embodiment of the present invention includes a command transmission / reception unit that transmits / receives a command to / from a playback device that plays back content, an executable state in which a program has been started, and an execution status in which a program has not been started. A first control unit having a possible state and executing a predetermined operation based on the command; and executing a predetermined operation based on the command and between the first control unit and the command transmission / reception unit. And a second control means for transmitting and receiving the command. When the second control means receives a start command and a playback command from the playback device when the first control means is in an inexecutable state, the second control means transmits a command to pause the playback operation to the playback device, Means for transmitting a start command and a regeneration command to the first control means; and means for transmitting a command for releasing the pause of the regeneration operation to the playback device after the first control means is ready for execution. Have. The first control means shifts to an executable state in response to the start command.

  When the first control unit is in an inexecutable state and receives a start command and a regeneration command from the playback device, the second control unit performs a playback operation on the playback device until the first control unit is in an executable state. Is transmitted to make the playback device stand by. After the first control means becomes ready for execution, the second control means transmits a command to release the pause to the playback apparatus, and causes the playback apparatus to start the playback operation. Therefore, when an audio signal is transmitted from the playback device, the first control means is always in an executable state, and it is possible to prevent the playback sound from being interrupted.

  Preferably, the second control unit is activated in the command received from the playback device when the storage unit for storing the command received from the playback device and the first control unit is not executable. Means for determining whether or not a command is included; means for storing a command received from the playback device in the storage unit when a startup command is included; and a startup command for the first control unit. And a means for transmitting a reproduction command stored in the storage unit to the first control means after the first control means is ready to be executed in response to the activation command.

  If the second control means transmits a start command and a regeneration command to the first control means when the first control means is in an inexecutable state, the first control means shifts to an executable state in response to the start command. However, since the regeneration command is transmitted to the first control unit before the execution becomes possible, the first control unit cannot respond to the regeneration command. Therefore, the second control unit stores the reproduction command in the storage unit, and transmits the reproduction command stored in the storage unit to the first control unit after the first control unit becomes executable. . As a result, the first control means can execute an operation in response to the regeneration command.

  Preferably, when the first control means is in an executable state and the command is received from the playback device, the second control means transmits the command to pause the playback operation to the playback device without transmitting the command. The command received from the playback device is transmitted to the first control means.

  Since the audio signal from the playback device can be immediately processed by the playback control device when the first control means is in an executable state, when the instruction to pause the content playback operation is transmitted to the playback device, the playback device is temporarily stopped. Although it is not necessary to stop, it is temporarily stopped. Therefore, when the second control means determines that the first control means is in an executable state, the second control means can solve this problem by not sending a command to pause the reproduction operation to the reproduction apparatus.

  Preferably, the second control means is configured to determine whether or not a playback command is included in the command received from the playback device, and to play back to the playback device when the playback command is included. And a means for transmitting a command for pausing the operation and not transmitting a command for pausing the reproduction operation to the reproducing apparatus when the reproduction command is not included.

  If the playback command is not included in the command from the playback device, the playback device does not start playback of the content. Therefore, it is determined whether or not a regeneration command is included in the command, and only when the regeneration command is included, a command to pause the playback operation is transmitted to the playback device. Transmission can be prevented.

  In another aspect of the present invention, an operation program for the amplification device or the reproduction control device can be provided.

  According to the present invention, it is possible to prevent interruption of sound to be output even when the start command and the playback command are received from the playback device when the amplifier device cannot amplify the audio signal.

  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 is a schematic diagram showing a content reproduction system 10 according to a preferred embodiment of the present invention. The content reproduction system 10 includes an amplifying device (having a function as a reproduction control device of the present invention) 11 with a built-in HDD (hard disk drive), and one or a plurality of reproducing devices 12 (for example, controllable with the amplifying device 11) CD player 12A, MD recorder 12B, etc.).

  The playback device 12 plays back the content and transmits it to the amplification device 11. Content is a general term for data such as music (voice) and video (image), and in this example, is music data. The amplifying device 11 selects and amplifies a music signal based on content stored in its own HDD 22 and a music signal transmitted from the plurality of playback devices 12, and a speaker (not shown). Output audio via Each reproduction device 12 is connected to the amplification device 11 via a communication cable, and transmits / receives commands to / from the amplification device 11 via the communication cable. Here, the command is a general term for a command for controlling the counterpart device and its own operation state notification, and when the counterpart device receives the command, the counterpart device executes a predetermined operation. It is.

  Since a plurality of playback devices 12 are connected to the amplification device 11, different types of commands are transmitted and received for each playback device. Here, the type represents the type of the playback device 12 to be connected, such as a CD player, an MD recorder, a tape recorder, and a DVD player. When the playback device 12 receives a command corresponding to the type of its own device from the amplification device 11, the playback device 12 performs an operation based on the received command. Conversely, the playback device 12 transmits a command corresponding to the type of its own device to the amplification device 11, and the amplification device 11 determines the type of the received command, thereby determining which playback device 12 has received the command. Can be recognized. In addition, the amplification device 11 transmits a command for operating the entire system that is common depending on the type. All the playback devices 12 that have received this command execute an operation based on the command.

  FIG. 2 is a schematic diagram illustrating the configuration of the amplifying device 11. The amplifying device 11 includes a first microcomputer 21, an HDD 22, a second microcomputer 23, a communication circuit 24, a command input / output terminal 25, a selector circuit 26, an amplifier circuit 27, an audio output terminal 28, a plurality of audio input terminals 29, and remote control signal reception. A circuit 30, a main power supply circuit 31, and a standby power supply circuit 32 are provided. The amplifying device 11 includes a power-on state in which both the main power supply 31 and the standby power supply 32 are on, a standby state in which the main power supply 31 is off and the standby power supply 32 is on, 31 and the standby power supply 32 both have a power off state in which the power is off.

  The HDD 22 stores, for example, an operating system (hereinafter referred to as OS) 22A such as LINUX or Windows (registered trademark), and a music playback application program (hereinafter referred to as playback application) 22B. The reproduction application 22B is a program for amplifying the music signal based on the content stored in the HDD 22 or the music signal received from the reproduction device 12 by the amplification circuit 27 and outputting the amplified signal to the speaker. That is, the playback application 22B is a program that controls a selector circuit 26, an amplifier circuit 27, a decoder, a sound processing unit (not shown) such as a DAC, and a display unit (not shown) such as an LCD. The HDD 22 stores a plurality of contents. The content stored in the HDD 22 is read according to an instruction from the first microcomputer 21, decoded and D / A converted by the audio processing unit, and supplied to the selector circuit 26.

  The first microcomputer 21 is a microcomputer that controls the HDD 22. That is, the first microcomputer 21 executes the music data reproduction operation by reading out the OS 22A stored in the HDD 22 to its own RAM 21A and executing it, and reading out and executing the reproduction application 22B in the RAM 21A.

  The first microcomputer 21 includes an executable state and an inexecutable state. The executable state is a state in which the first microcomputer 21 can control, and the playback application 22B is already activated in the RAM 21A. The inexecutable state is a state in which the first microcomputer 21 cannot be controlled, and the playback application 22B is not activated in the RAM 21A.

  Specifically, when the amplification device 11 is in the standby state, the standby power 32 is supplied to the first microcomputer 21, and the OS 22 </ b> A is in the standby state after being read into the RAM 21 </ b> A of the first microcomputer 21. . The reason why the OS 22A is in the standby state is to start the OS 22A instantly when the amplifying apparatus 11 is turned on. On the other hand, the playback application 22B is not read into the RAM 21A, and the program is in an end state. This state is an inexecutable state.

  On the other hand, when the activation command is transmitted from the second microcomputer 23 to the first microcomputer 21, the OS 22A in the standby state in the RAM 21A is activated, and then the playback application 22B is read from the HDD 22 to the RAM 21A and activated. The This state is an executable state.

  The second microcomputer 23 is a microcomputer that controls a part other than the HDD 22 in the amplification device 11. For example, the second microcomputer 23 controls the selector circuit 26 and the amplifier circuit 27 in accordance with an instruction from the first microcomputer 21. Further, the second microcomputer 23 transmits / receives a command to / from the playback device 12 or receives a command from the system remote controller 34. That is, the second microcomputer 23 performs a predetermined operation (for example, turns on the main power supply 31) based on the command received from the playback device 12 and the system remote controller 34, and sends the command to the first microcomputer. 21 to send. In addition, the second microcomputer 23 transfers the command received from the first microcomputer 21 to the reproduction device 12 and controls each part of the amplification device 11. The second microcomputer 23 manages whether or not the playback application 22B has been activated in the RAM 21A.

  The second microcomputer 23 has a buffer 23A. When the second microcomputer 23A receives a series of commands including a startup command from the playback device 12, if the playback application 22B is not already started, the second microcomputer 23A temporarily stores the series of commands in the buffer 23A. For example, when the activation command and the reproduction command are received, the reproduction command is transmitted to the first microcomputer 21 after the reproduction application 22B is activated. Specifically, as shown in FIG. 3, the buffer 23 </ b> A includes an area for storing a start command and a command (for example, a playback command) received after the start command. The command stored in the buffer 23A is cleared, for example, when the amplifying apparatus 11 enters a standby state.

  The command input / output terminal 25 is a terminal through which commands are input / output to / from the playback device 12. The communication circuit 24 is a circuit that transmits a command between the command input / output terminal 25 and the second microcomputer 23. The audio input terminal 29 is connected to the audio output terminals of the plurality of playback devices 12, and an audio signal is input from the playback device 12. The selector circuit 26 selects and amplifies one audio signal from the audio signals input from the plurality of playback devices 12 via the audio input terminal 29 and the audio signal based on the content read from the HDD 22. This is given to the circuit 27. The selected audio signal is amplified by the amplifier circuit 27 and output to the speaker via the audio output terminal 28. The remote control signal receiving circuit 30 converts the infrared signal command received from the system remote control 34 into an electrical signal command and provides the command to the second microcomputer 23.

  The main power supply circuit 31 is a power supply that is turned on in the power-on state and turned off in the standby state, and is a power supply circuit that is supplied to each part of the amplifying device 11. The standby power supply circuit 32 is a power supply that is turned on in both the power-on state and the standby state, and is supplied only to the first microcomputer 21, the second microcomputer 23, and their peripheral circuits.

  Although not shown, the playback device 12 has a main power supply and a standby power supply that supplies voltage only to the microcomputer, and has a power-on state, a standby state, and a power-off state as power supply operation states. . The power-on state is a state in which both the main power supply and the standby power supply are on, and the playback device 12 can play back music signals and transmit them to the amplification device 11. The standby state is a state in which only the standby power supply is on, the power supply voltage is supplied only to the microcomputer, and the remote control operation from the user can be accepted. The power off state is a state in which both the main power source and the standby power source are off.

  The playback device 12 transmits the following command to the amplification device 11 in accordance with the operation state of its own power supply and an instruction from the user. That is, the playback device 12 transmits a playback command to the amplification device 11 when a playback instruction is input by a user operation when the playback device 12 is powered on. The reproduction command notifies the amplification device 11 that the reproduction device 12 starts reproduction, and the amplification device 11 amplifies the audio signal from the reproduction device 12 so that it can be output to the speaker (for example, the selector is switched). Etc.) It is a command.

  When a playback instruction is input by a user operation when the playback device 12 is in a standby state, the playback device 12 transmits a start command and a playback command to the amplification device 11 in this order. The start command is a command for notifying the amplifying device 11 that the playback device 12 is in the power-on state and causing the amplifying device 11 to shift from the standby state to the power-on state. This is because, when the playback device 12 is in the standby state, the amplification device 11 is also normally in the standby state, and thus it is necessary to turn the amplification device 11 into a power-on state by an activation command.

  The operation of the amplifying apparatus 11 having the above configuration will be described. FIG. 4 is a flowchart showing processing of the second microcomputer 23 of the amplification device 11. 5 to 8 are sequence diagrams for explaining the operations of the first microcomputer 21, the second microcomputer 23, and the playback apparatus 12 (CD player 12A in this example).

[When the reproduction instruction is input while the amplification device 11 and the reproduction device 12 are in the standby state]
In this example, a case where the user inputs a reproduction instruction to the CD player 12A when the amplification device 11 and the CD player 12A are in the standby state will be described with reference to FIGS. First, when a reproduction instruction is input by a user operation, the CD player 12A prepares for CD reproduction after the power is turned on from the standby state. Subsequently, the CD player 12A transmits an activation command and a reproduction command to the second microcomputer 23 of the amplification device 11 in this order (S101). Since the start command and the playback command are commands for each type (for the CD player only), the first microcomputer 21 and the second microcomputer 23 that have received the commands can recognize that they are commands from the CD player. The second microcomputer 23 determines whether or not a command has been received from the playback device 12 (S11). When the activation command and the reproduction command are received from the CD player 12A (S11: YES), the second microcomputer 23 determines whether or not the reproduction application 22B has been activated (S12).

  Since the amplification device 11 is in the standby state and the reproduction application 22B is not activated (S12: NO), the second microcomputer 23 determines whether or not the activation command is included in the received series of commands. (S13). Here, since a start command is included (S13: YES), the second microcomputer 23 controls the main power supply 31 to turn it on (S14). Subsequently, the second microcomputer 23 stores the activation command and the reproduction command received next in the buffer 23A (S15, S131).

  The second microcomputer 23 determines whether or not the next command after the start command is a regeneration command (S16). Here, since the next command after the start command is a playback command (S16: YES), a pause command is transmitted to the CD player 12A (S17, S132). If the playback device 12 is a cassette tape player, there is no temporary stop command, so a stop command may be transmitted instead. The CD player 12A receives the pause command from the second microcomputer 23, and enters the pause state from the CD playback preparation state (S102).

  Subsequently, the second microcomputer 23 transmits an activation command to the first microcomputer 21 (S18, S133). When receiving the activation command from the second microcomputer 23, the first microcomputer 21 activates the OA 22A that is read to the RAM 21A and is in the standby state, and then reads the reproduction application 22B from the HDD 22 to the RAM 21A and activates it (S151). .

  The first microcomputer 21 transmits a command inquiry to the second microcomputer 23 after the playback application 22B is activated (S152). The command inquiry confirms whether or not a playback command is transmitted following the start command from the CD player 12A.

  The second microcomputer 23 determines whether a command inquiry has been received from the first microcomputer 21 (S19). Here, since the command inquiry has been received (S19: YES), the second microcomputer 23 determines whether or not the reproduction command is stored in the buffer 23A (S20). Here, since the reproduction command is stored in the buffer 23A (S20: YES), the second microcomputer 23 reads the reproduction command from the buffer 23A and transmits it to the first microcomputer 21 (S21, S134). When receiving the reproduction command, the first microcomputer 21 prepares for reproduction (S153).

  Specifically, the first microcomputer 21 provides a control signal for setting the amplifier circuit 27 in the mute state to the amplifier circuit 27 via the second microcomputer 23, thereby setting the amplifier circuit 27 in the mute state. Next, the first microcomputer 21 gives a control signal for selecting an audio input terminal to which the CD player 12 </ b> A is connected to the selector circuit 26 to the selector circuit 26 via the second microcomputer 23. The selector circuit 26 selects an audio input terminal to which the CD player 12A is connected. Next, the first microcomputer 21 gives a control signal for canceling the mute state of the amplifier circuit 27 to the amplifier circuit 27 via the second microcomputer 23, and cancels the mute state of the amplifier circuit 27. Finally, the first microcomputer 21 controls the second microcomputer 23 so that a menu screen related to the CD is displayed on a display unit (not shown). When the above reproduction preparation is completed, the first microcomputer 21 returns a reproduction command to the second microcomputer 22 (S153). This reproduction command notifies the CD player 12A that the first microcomputer 21 has completed preparation for reproduction.

  The second microcomputer 23 determines whether or not a reproduction command has been received from the first microcomputer 21 (S22). When the reproduction command is received (S22: YES), the second microcomputer 23 transfers the reproduction command to the CD player 12A (S23, S135). When the CD player 12A receives the reproduction command from the second microcomputer 23, the CD player 12A cancels the pause state and shifts to the CD reproduction state.

  As described above, when the reproduction instruction is input to the CD player by the user when the amplification device 11 and the CD player 12A are both in the standby state, the first microcomputer 21 of the amplification device 11 activates the reproduction application 22B and performs reproduction. After the preparation is completed, the CD player 12A starts playing the CD. Therefore, it is possible to solve the problem that the audio signal reproduced by the CD player 12A is not amplified by the amplifying device 11 and the reproduced sound is interrupted.

  Note that the playback application 22B stores the operation state at that time (for example, an MD menu screen to be displayed on the display unit when MD is being played back) in the RAM 21A at the end of the program, and starts up next time. The operation state is read from the RAM 21A and restored. Therefore, the MD menu screen is displayed on the display unit when the MD was played last time, at the time of starting and after the playback application 22B, and until the playback preparation is completed in S153. This is because the MD menu screen is temporarily displayed on the display unit of the amplifying apparatus 11 in spite of the user's input of the playback instruction of the CD player, and the user may misunderstand that a problem has occurred. . Therefore, in this example, a screen “... being activated” is stored in advance in association with the type of the playback device 12A, the first microcomputer 21 determines the type of the startup command, and starts the CD startup command. If this is the case, this problem can be solved by reading the “CD is running” screen and displaying it on the display unit.

[When a power-on instruction is input when the amplification device 11 and the reproduction device 12 are in the standby state]
In this example, a case where the user inputs a power-on instruction to the CD player 12A when the amplification device 11 and the CD player 12A are in the standby state will be described with reference to FIGS. First, when a power-on instruction is input by a user operation, the CD player 12A transmits a start command to the second microcomputer 23 of the amplifying apparatus 11 after being switched from the standby state to the power-on state (S201). When receiving the activation command from the CD player 12A (S11: YES, S231), the second microcomputer 23 determines that the playback application 22B has not been activated (S12: NO). Next, since the start command is included in the command (S13: YES), the second microcomputer 23 turns on the main power supply 31 (S14), and stores the start command in the buffer 23A (S15). Since there is no regeneration command next to the startup command (S16: NO), the startup command is transmitted to the first microcomputer 21 (S18, S232). In response to the activation command, the first microcomputer 21 activates the OS 22A and the playback application 22B (S251), and transmits a command inquiry to the second microcomputer 23 (S252). When receiving the command inquiry (S19: YES), the second microcomputer 23 determines that the reproduction command is not stored in the buffer 23A (S20: NO), and ends the process without responding (S233).

[When a reproduction instruction is input when the amplifier 11 is in a power-on state and the CD player 12A is in a standby state]
In this example, a case where a reproduction instruction is input to the CD player 12A by a user operation when the amplifier 11 is in a power-on state and the CD player 12A is in a standby state will be described with reference to FIGS. First, when a power-on instruction is input by a user operation, the CD player 12A changes from a standby state to a power-on state, and then transmits a start command and a reproduction command to the second microcomputer 23 of the amplification device 11 (S301). . When the second microcomputer 23 receives a command from the CD player 12A (S11: YES, S331), the second microcomputer 23 determines that the playback application 22B has been activated (S12: YES). As a result, the second microcomputer 23 transmits the start command and the reproduction command to the first microcomputer 21 without storing the command in the buffer 23A or transmitting the pause command to the CD player 12A (S24, S332). . This is because the playback application 22B has already been activated and there is no interruption in sound, so there is no need to pause the CD player 12A. When the first microcomputer 21 receives the activation command and the reproduction command from the second microcomputer 23 (S351), since the reproduction application has already been activated, the activation command is discarded and the reproduction is performed as described above according to the reproduction command. Preparation is executed immediately (S352).

[When a playback instruction is input when the amplifier 11 is in the standby state and the CD player 12A is in the power-on state]
In this example, a case where a reproduction instruction is input to the CD player 12A by a user operation when the amplification device 11 is in a standby state and the CD player 12A is in a power-on state will be described with reference to FIGS. The CD player 12A transmits a reproduction command to the second microcomputer 23 (S401). When the second microcomputer 23 receives the reproduction command from the CD player 12A (S11: YES, S431), it determines that the reproduction application 22B has not been activated (S12: NO), but there is no activation command in the command ( (S13: NO), the command is discarded (S25, S432), and the process is terminated.

[When a playback instruction is input when the amplifier 11 is in a power-on state and the CD player 12A is in a standby state (2)]
In the processing of FIG. 7, when the activation command and the reproduction command are received from the CD player 12A, even if the reproduction application 22B has been activated, it takes time for the reproduction preparation (selector switching, etc.) in S352, In some cases, the sound signal may be cut off because the audio signal cannot be amplified. In this case, even when the playback application 22B has been activated, the CD player 12A is temporarily stopped until the playback preparation by the first microcomputer 21 is completed.

  Although detailed description will be given with reference to FIG. 9, the same processes as those in FIG. When the first microcomputer 21 receives a start command and a regeneration command from the second microcomputer 23 (S351), the first microcomputer 21 transmits a temporary stop command to the second microcomputer 23 (S551). The second microcomputer 23 transfers the pause command from the first microcomputer 21 to the CD player 12A (S531), and the CD player 12A enters a pause state (S501). When the reproduction preparation is completed (S352), the first microcomputer 21 returns a reproduction command to the second microcomputer 23 (S552). The second microcomputer 23 transfers the reproduction command to the CD player 12A (S532), and the CD player 12A starts the reproduction operation (S502).

  As described above, according to the present embodiment, the second microcomputer 23 of the amplifying device 11 receives the activation command and the reproduction command from the reproduction device 12, and when the reproduction application 22B is not activated, the second microcomputer 23 temporarily A stop command is transmitted, and playback of the content is paused. Then, the second microcomputer 23 transmits an activation command to the first microcomputer 21, activates the reproduction application 22B, and releases the pause of the reproduction apparatus 12 after the reproduction application 22B is ready for reproduction. As a result, it is possible to prevent sound interruption even when the playback device 12B starts playback when the playback application 22B is not activated.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment. For example, in an amplifying apparatus that does not include the first microcomputer 21 but includes only the second microcomputer 23, the reproducing operation of the reproducing apparatus 12 is performed until the second microcomputer 23 can amplify the audio signal. May be temporarily stopped. Similarly, the playback operation of the playback device 12 may be paused until the HDD, CD drive, or the like becomes operable from the standby state. The start command and the playback command may be a common command. The music signal of this embodiment includes both digital and analog meanings. 7 and 9, the process when the CD player is in the power-on state is the same except that no activation command is transmitted from the CD player. The present invention may be provided in the form of the operation program of the amplifying device 11 or a recording medium on which it is recorded.

  The present invention can be suitably applied to an amplifying apparatus that transmits / receives a command to / from a content reproduction apparatus.

1 is a block diagram illustrating a content reproduction system according to a preferred embodiment of the present invention. 2 is a schematic block diagram showing a configuration of an amplifying device 11. FIG. It is a figure which shows the structure of the buffer 23A in the 2nd microcomputer 23. FIG. 4 is a flowchart showing processing of a second microcomputer 23. It is a figure for demonstrating operation | movement of the 1st microcomputer 21, the 2nd microcomputer 23, and the reproducing | regenerating apparatus 12. FIG. It is a figure for demonstrating operation | movement of the 1st microcomputer 21, the 2nd microcomputer 23, and the reproducing | regenerating apparatus 12. FIG. It is a figure for demonstrating operation | movement of the 1st microcomputer 21, the 2nd microcomputer 23, and the reproducing | regenerating apparatus 12. FIG. It is a figure for demonstrating operation | movement of the 1st microcomputer 21, the 2nd microcomputer 23, and the reproducing | regenerating apparatus 12. FIG. It is a figure for demonstrating operation | movement of the 1st microcomputer 21, the 2nd microcomputer 23, and the reproducing | regenerating apparatus 12. FIG.

Explanation of symbols

11 Amplifying device (reproduction control device)
12 playback device 21 first microcomputer 22 HDD
22A OS
22B Playback application 23 Second microcomputer 23A Buffer 25 Command input / output terminal 27 Amplifier circuit 29 Audio input terminal

Claims (5)

When the content is reproduced and the audio signal is transmitted to the amplifying device, and a reproduction instruction is input by a user operation when the reproducing device is in a standby state, the start command and the reproduction command are transmitted to the amplifying device, and the content is Command transmission / reception means for transmitting / receiving a command between the reproduction apparatus for starting reproduction and the control means;
Signal receiving means for receiving an audio signal from the playback device;
Amplifying means for amplifying the audio signal;
A control means for executing a predetermined operation based on the command received from the command transmission / reception means, having an executable state in which the playback program has been started and an inexecutable state in which the playback program has not been started; ,
Determining means for determining whether or not the control means is in an executable state,
When the control means is in an inexecutable state and receives a start command and a playback command from the playback device via the command transmission / reception means, the control means issues a command to cause the playback device to pause the playback operation. Transmitted via the command transmission / reception means,
After the control means is in an executable state, the control means transmits a command for releasing the pause of the reproduction operation to the reproduction device via the command transmission / reception means,
When the start-up command and the playback command are received from the playback device via the command transmission / reception device when the control device is in an executable state, the control device issues a command for causing the playback device to pause the playback operation. An amplifying apparatus that does not transmit via command transmission / reception means . When the content is reproduced and the audio signal is transmitted to the amplifying device, and a reproduction instruction is input by a user operation when the reproducing device is in a standby state, the start command and the reproduction command are transmitted to the amplifying device, and the content is Command transmission / reception means for transmitting / receiving a command between the reproduction apparatus for starting reproduction and the second control means;
Signal receiving means for receiving an audio signal from the playback device;
Amplifying means for amplifying the audio signal;
A first control means having an executable state in which the playback program has been started and an inexecutable state in which the playback program has not been started, and executing a predetermined operation based on the command;
A predetermined operation based on the command, the second control unit transmitting and receiving the command to and from the first control unit and the command transmission and reception unit;
Determining means for determining whether or not the first control means is in an executable state,
When the second control means receives an activation command and a reproduction command from the playback device via the command transmission / reception means when the first control means is in an inexecutable state, the playback device temporarily performs a playback operation on the playback device. A command to stop is transmitted via the command transmission / reception means, a start command and a regeneration command are transmitted to the first control means,
The first control means shifts to an executable state in response to the start command received from the second control means,
After the first control means is in an executable state, the second control means transmits a command for releasing the pause of the reproduction operation to the reproduction device via the command transmission / reception means,
When the second control unit receives a start command and a playback command from the playback device via the command transmission / reception unit when the first control unit is in an executable state, the playback device temporarily stops the playback operation. An amplifying apparatus that does not transmit a command to be transmitted through the command transmitting / receiving means . A storage unit for storing a command received by the second control unit from the playback device via the command transmission / reception unit;
Means for determining whether or not a start command is included in a command received from the playback device via the command transmission / reception unit when the first control unit is in an inexecutable state;
Means for storing, in the storage unit, a command received from the playback device via the command transmission / reception means when an activation command is included;
The second control means transmits an activation command to the first control means, and after the first control means becomes executable in response to the activation command, a reproduction command stored in the storage unit is issued. The amplifying apparatus according to claim 2, wherein the amplifying apparatus transmits to the first control means. The second control means determines whether or not a reproduction command is included in a command received from the reproduction device via the command transmission / reception means, and when the reproduction command is included, the reproduction device A command to pause the playback operation via the command transmission / reception means, and if the playback command is not included, a command to pause the playback operation to the playback device is sent via the command transmission / reception means. not transmitting, amplifier according to claim 2 or 3.   Even when the second control means receives a start command and a reproduction command from the reproduction device via the command transmission / reception means when the first control means is in an executable state, the reproduction of the amplification device is performed. When the preparation is not completed, a command to pause the playback operation is transmitted to the playback device via the command transmission / reception means, and when the playback preparation is completed, the playback operation is paused to the playback device. The amplifying apparatus according to claim 2, wherein a command to be transmitted is not transmitted via the command transmission / reception means.

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