JP4930319B2 - Audio system, program, and power control method for audio system - Google Patents

Description

  The present invention relates to an audio system including a playback device and an amplification device, a program for causing a computer to function as each unit in the audio system, and a power control method for the audio system.

  2. Description of the Related Art Conventionally, in an audio system in which a playback apparatus and an amplifier are separated from each other, the amplifier side is automatically powered off when no key operation on the amplifier side occurs for a certain period of time.

  FIG. 5 is an external view of such a conventional audio system. In the figure, 51 is a CD player that outputs an audio signal based on music data recorded on a CD as a digital or analog audio signal, 52 is an amplifier that amplifies the audio signal from the CD player 51, and 53 is from the CD player 1. A digital cable for transmitting the digital audio signal to the amplifier 52, and 54 an analog cable for transmitting the analog audio signal from the CD player 1 to the amplifier 52. Each of the CD player 51 and the amplifier 52 includes a control unit that controls each part of the apparatus and performs necessary information processing according to a program, and operation keys for a user to give an instruction to the control unit.

  FIG. 6 is a flowchart showing processing by the control unit of the amplifier 52. In this process, when the operation key is not operated for a predetermined period, the power of the amplifier 52 is automatically turned off. That is, when the power supply of the amplifier 52 is detected in step 61, the control unit of the amplifier 52 sets the above-described predetermined period in the automatic power-off timer in step 62. Next, in step 63, it is determined whether or not a key operation has been performed on the operation unit of the amplifier 52. If it is determined that a key operation has been performed, the process returns to step 62, the predetermined period is set again, and the automatic power-off timer is returned to the initial state.

  If it is determined in step 63 that there is no key operation, the process proceeds to step 64 and the automatic power-off timer is counted down. Next, in step 65, it is determined whether or not the automatic power-off timer has expired. If it is determined that the time is not up, the process returns to step 63. If it is determined that the time is up, the process proceeds to step 66 where the power of the amplifier 62 is turned off, and the process of FIG.

  FIG. 7 is a flowchart showing processing by the control unit of the CD player 51. When power-on is detected in step 71, TOC information is read from the CD in step 72, and a disc title or the like is displayed. Next, in step 73, input of a reproduction start instruction by the reproduction key is awaited. When this input is detected, CD playback is started in step 74. Next, in steps 75 and 76, input of a playback stop instruction by the end of playback of the CD or a stop key is awaited. When the playback end or input by the stop key is detected, the process proceeds to step 77, the CD playback is stopped, and the process of FIG. 7 is ended.

  Further, as similar to the automatic power-off technology of the amplifier 52 in the audio system described above, the on / off state of the power supply in the external device is determined based on the data input state from the external device, and linked with the external device. An audio signal device or a video signal device that controls the power supply so that the power supply is turned on / off in a similar manner is also known (see, for example, Patent Document 1). There is also known an electronic device that cuts off the supply of power when there is no operation input for a certain time (see, for example, Patent Document 2).

JP 09-018772 A JP 2003-274262 A

  However, according to the above-described conventional audio system, when the key operation in the amplifier 52 does not occur for a certain time, the power of the amplifier 52 is unconditionally turned off. However, there is a problem that the operation of the amplifier 52 stops unless the key operation of the amplifier 52 is performed for a certain period of time.

  In order to prevent the amplifier 52 from being turned off during playback of the CD player 51, the CD player 51 and the amplifier 52 are turned on as in the case of the audio signal device or the video signal device described above. When the CD player 51 is turned on, the amplifier 52 must be kept on even when the CD player 51 is on, even when the power is turned off. .

  An object of the present invention is to make it possible to more appropriately control power on / off timing in an amplifying apparatus in an audio system in view of the problems of the prior art.

  In order to achieve this object, a playback device according to a first aspect of the present invention is an audio system including a playback device and an amplification device, and the playback device plays back an audio signal based on audio data recorded on a recording medium. And a reproduction stop notification transmission unit that transmits a reproduction stop notification indicating that to the amplification device when reproduction by the reproduction unit is stopped. Amplifying means for amplifying the audio signal, a reproduction stop notice receiving means for receiving a reproduction stop notice from the reproduction apparatus, and an amplification apparatus after a predetermined time has elapsed since the reproduction stop notice was received by the reproduction stop notice receiving means And a control means for cutting off the power source.

  Here, as the recording medium, for example, a disk-shaped medium such as a CD (compact disk), an MD (mini disk), a DVD (digital versatile disk), or a semiconductor memory is applicable. As the reproducing means, for example, there is one that reads audio data from these recording media, performs necessary signal processing, and outputs an audio signal. As an amplifying device, for example, a device that amplifies an audio signal from a reproducing device and supplies the amplified signal to a speaker is applicable. As the reproduction stop notification receiving means, for example, one having a communication means for performing communication via a predetermined interface by a predetermined protocol is applicable.

  In this configuration, when playback by the playback unit is stopped, the playback device transmits a playback stop notification indicating that to the amplification device. The amplifying apparatus receives this, and turns off the power after a predetermined period. Thereby, in the audio system, it is possible to more appropriately control the power-off timing in the amplification device.

  An audio system according to a second invention is the audio system according to the first invention, wherein when the playback device stops recording on the recording medium based on the input audio signal, and the recording by the recording means is stopped, A recording stop notification transmitting means for transmitting a recording stop notification indicating to the amplifying apparatus, wherein the amplifying means receives a recording stop notification from the recording / reproducing apparatus. And the control means turns off the power supply of the amplifying apparatus after a predetermined time has elapsed after receiving the recording stop notice by the recording stop notice receiving means.

  The amplification device according to a third invention is the amplification device according to the first or second invention, wherein when the amplification device performs power-off by the control means, a power-off notification indicating the fact is transmitted to the reproduction device. A power-off notification means for receiving the power-off notification from the amplifying apparatus, and when the power-off notification is received by the power-off notification receiving means. And a control means for cutting off the power.

  A program according to a fourth invention causes a computer to function as each means in any one of the first to third audio systems.

  A power control method for an audio system according to a fifth aspect of the present invention is a power control method for an audio system comprising a playback device and an amplification device, wherein the playback device generates an audio signal based on audio data recorded on a recording medium. A reproduction step for reproduction, and a reproduction stop notification transmission step for transmitting a reproduction stop notification indicating that to the amplification device when reproduction by the reproduction step is stopped, and the amplification device includes: An amplification step for amplifying the audio signal, a reproduction stop notification reception step for receiving a reproduction stop notification from the reproduction device, and amplifying the amplification after a predetermined time has elapsed since the reproduction stop notification was received by the reproduction stop notification reception step. And a control step of cutting off the power supply of the apparatus.

  According to the present invention, the playback device transmits a playback stop notification to the amplifying device when playback is stopped, and the amplifying device turns off the power of the amplifying device after a predetermined time has elapsed since the reception of the playback stop notification. Can be performed at a more appropriate timing.

  FIG. 1 is an external view of an audio system according to an embodiment of the present invention. In the figure, 1 is a CD player that outputs an audio signal based on music data recorded on a CD as a digital or analog audio signal, 2 is an amplifier that amplifies the audio signal from the CD player 1, and 3 is from the CD player 1. 4 is an analog cable for transmitting an analog audio signal from the CD player 1 to the amplifier 2, and 5 is necessary between the CD player 1 and the amplifier 2. A data cable for transmitting control data.

  Each of the CD player 1 and the amplifier 2 includes a control unit that performs control of each unit and necessary information processing according to a program, and operation keys for a user to give an instruction to the control unit. The operation keys of the CD player 1 include a playback key for instructing start of playback and a stop key for instructing stop of playback. The amplifier 2 includes an input selector for selecting an input to the amplifier 2. The operation key of the amplifier 2 includes a selector key for switching an input selector, and switches sound or the like (for example, CD, tuner, external input, etc.) input to the amplifier. Each of the CD player 1 and the amplifier 2 has a communication function for both control units to transmit and receive control data indicating the state of the apparatus to each other via the data cable 5.

  FIG. 2 is a flowchart showing processing by the control unit of the amplifier 2. In this process, when the input from the CD player 1 is selected by the selector of the amplifier 2 as an input destination, both of the reproduction of the CD on the CD player 1 and the key operation on the operation unit of the amplifier 2 have a predetermined delay. If it is not performed continuously over a period of time, automatic power off is performed to turn off the power.

  That is, when it is detected in step 11 that the amplifier 2 is turned on, the control unit of the amplifier 2 notifies the CD player 1 to that effect in step 12. Upon receiving this notification, the CD player 1 is also turned on. Next, in step 13, the position of the input selector is notified to the CD player 1, and in step 14, it is determined whether or not the position of the input selector is the CD player 1.

  When it is determined that the position of the input selector is the CD player 1, the period in which neither the CD playback nor the key operation in the operation unit of the amplifier 2 is performed in steps 15 to 20 is the above-described grace period. The system waits until it exceeds, and when the passage of the period is detected, automatic power off is performed. However, if the input selector is switched to other than the CD player 1 during this period, the process returns to step 13.

  That is, in step 15, the above-described grace period is set in the automatic power-off timer and the countdown is started. Next, in step 16, it is determined whether or not the CD player 1 is notified of the start of CD playback. If it is determined that the start of reproduction has been notified, the process returns to step 15 and the countdown is repeated from the beginning. If it is determined that the start of playback has not been notified, the process proceeds to step 17 to determine whether or not the CD player 1 has notified the stop of playback of the CD. If it is determined that the reproduction stop has not been notified, the process returns to step 15 and the countdown is repeated from the beginning. If it is determined that the reproduction stop has been notified, the process proceeds to step 18 to determine whether or not there has been a key operation on the operation unit of the amplifier 2.

  If it is determined in step 18 that there has been a key operation, the process proceeds to step 19 to determine whether the key operation is switching of the input selector. If it is determined that the input selector is not switched, the process returns to step 15 to start counting down again. If it is determined that the input selector is switched, the process returns to step 13.

  If it is determined in step 18 that there is no key operation, it is determined in step 20 whether or not the automatic power-off timer has expired. The time-up of the automatic power-off timer means that a period in which no CD is played and no key operation is performed on the operation unit of the amplifier 2 has exceeded the above-described grace period. If it is determined that the time has not expired, the process returns to step 16 to repeat the above process.

  If it is determined in step 20 that the time is up, the process proceeds to step 21 to notify the CD player 1 that the power is turned off. In step 22, the power of the amplifier 2 is turned off, and the process is terminated.

  On the other hand, if it is determined in step 14 that the position of the input selector is not set to CD player 1, in steps 23 to 26, it waits for a predetermined grace period to elapse without any key operation in the amplifier operation unit. When the passage of the period is detected, automatic power off is performed.

  That is, first, in step 23, the above-described grace period is set in the automatic power-off timer, and countdown is started. Next, in step 24, it is determined whether or not there is a key operation on the operation unit of the amplifier 2. If it is determined that the key operation has been performed, the process proceeds to step 25 to determine whether or not the key operation is switching of the input selector. If it is determined that the input selector is not switched, the process returns to step 23 and the countdown is repeated from the beginning. If it is determined that the input selector is switched, the process returns to step 13.

  If it is determined in step 24 that there is no key operation, the process proceeds to step 26 to determine whether or not the automatic power-off timer has expired. If it is determined that the time is not up, the process returns to step 24 and the above-described processing is repeated. If it is determined that the time is up, the process proceeds to step 22 where the power of the amplifier 2 is turned off and the process is terminated.

  FIG. 3 is a flowchart showing processing by the control unit of the CD player 1. In this process, the amplifier 2 is notified of the start of playback and the stop of playback so that the amplifier 2 can perform the automatic power-off described above.

  That is, first, in step 31, when a notification that the power is turned on is received from the amplifier 2 or the power-on of the CD player 1 is detected, in step 32 TOC information is read from the CD and a disc title or the like is displayed. Next, in step 33, the CD is brought into a stopped state, and this is notified to the amplifier 2. The amplifier 2 determines the presence / absence of this notification in step 17 of FIG. 2, and determines the processing related to the automatic power-off timer.

  Next, in step 34, the control waits for a notification that the input selector from the amplifier 2 is selecting the CD. When this notification is received, in step 35, input of a reproduction start instruction by the reproduction key is awaited. When this input is detected, in step 36, the amplifier 2 is notified that the reproduction is started. The amplifier 2 determines the presence / absence of this notification in step 16 of the processing of FIG. 2, and determines processing related to the automatic power-off timer.

  Next, in step 37, CD playback is started. In steps 38 and 39, the process waits for the end of the reproduction of the CD or the input of the reproduction stop instruction by the stop key. When the playback end or input by the stop key is detected, the process proceeds to step 40 to notify the amplifier 2 that the CD playback is stopped. The amplifier 2 determines the presence / absence of this notification in step 17 of FIG. 2, and determines the processing related to the automatic power-off timer.

  Next, in step 41, the reproduction of the CD is stopped. Next, in step 42, a notice of disconnecting the power from the amplifier 2 (step 21 in FIG. 2) is waited for. When this notification is detected, the power source of the CD player 1 is turned off in step 43. Thereby, the process of FIG. 3 is completed.

  According to the present embodiment, when the input selector of the amplifier 2 selects CD, the CD player 1 notifies the amplifier 2 of the stop and start of CD playback (steps 33, 36, and 40). In addition, based on this notification, the amplifier 2 turns off the power only when the CD is not reproduced and the period of no key input in the operation unit continues without interruption until it exceeds a predetermined grace period (step 15 to 22), the power supply of the amplifier 2 can be turned off at an appropriate timing.

  Note that a recording / reproducing apparatus is used instead of the CD player 1, and a recording state including dubbing in the apparatus is also notified to the amplifier 2, and the amplifier 2 controls the power-off timing in consideration of this recording state. May be.

  FIG. 4 is an external view of such an audio system according to another embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 1 denote the same elements as in FIG. In FIG. 4, reference numeral 6 denotes a recording / reproducing apparatus having a function of reproducing a CD and recording on a CD-R or CD-RW. The recording / reproducing apparatus 6 includes a control unit that performs control of each unit and necessary information processing according to a program, an operation key for a user to give an instruction to the control unit, and the like. The operation keys include a reproduction key for instructing the start of reproduction, a reproduction stop key for instructing a reproduction stop, a recording key for instructing a recording start, and a recording stop key for instructing a recording stop. It is. Reference numeral 7 denotes an analog cable for inputting the amplifier 2 analog audio signal to the recording / reproducing apparatus 6.

  The control unit of the recording / reproducing apparatus 6 performs processing similar to the processing in FIG. 3 when recording is performed based on the audio signal input from the amplifier 2 via the analog cable 7. In that case, the control unit of the amplifier 2 performs the same process as the process of FIG. In these processes, the difference from the processes in FIGS. 3 and 2 is that the operation relating to reproduction becomes the operation relating to recording.

  That is, the notification given to the amplifier 2 in steps 33 and 40 in FIG. 3 is a notification that recording has been stopped, and the notification given to the amplifier 2 in step 36 is a notification that recording is started, In 39, the recording key and the recording stop key stand by for input, respectively, and the processing in steps 37 and 41 starts recording and stops recording, respectively. Further, whether or not there is a notification in steps 16 and 17 in FIG. 2 is a recording start notification and a recording stop notification, respectively.

Therefore, in the amplifier 2, when the input selector selects the recording / reproducing device 6, the recording / reproducing device 6 does not perform recording, and the period without the key operation in the amplifier 2 exceeds a predetermined grace period without interruption. If it continues, automatic power off is performed. Therefore, also in this case, automatic power off can be performed at a more appropriate timing.
Is called.

  Note that the present invention is not limited to the above-described embodiment, and can be implemented with appropriate modifications. For example, in the above description, the playback and start of the CD are notified to the amplifier 2, and the amplifier 2 controls the power-off timing in consideration of this notification. In addition to the playback and start of the CD, the program playback is started. The CD player 1 notifies the amplifier 2 of the setting state in the CD player 1 such as registration, title input, and setup, and the amplifier 2 controls the power-off timing in consideration of this setting state. Also good. Furthermore, when an operation key is operated on the CD player 1, the amplifier 2 is notified of this, and the amplifier 2 may control the power-off timing in consideration of this notification.

1 is an external view of an audio system according to an embodiment of the present invention. It is a flowchart which shows the process by the control part of the amplifier in the system of FIG. 2 is a flowchart showing processing by a control unit of a CD player in the system of FIG. It is an external view of the audio system which concerns on another embodiment of this invention. It is an external view of the conventional audio system. It is a flowchart which shows the process by the control part of the amplifier in the system of FIG. 6 is a flowchart showing processing by a control unit of a CD player in the system of FIG.

Explanation of symbols

  1, 51: CD player, 2, 52: amplifier, 3, 53: digital cable, 4, 54: analog cable, 5: data cable, 6: recording / reproducing apparatus, 7: analog cable.

Claims (4)

An audio system comprising a playback device and an amplification device,
The amplification device includes:
Amplifying means for amplifying the audio signal from the playback device;
Playback stop notification receiving means for receiving a playback stop notification from the playback device;
Control means for turning off the power of the amplification device after a predetermined time has elapsed after receiving the reproduction stop notice by the reproduction stop notice receiving means ;
A power-off notification unit that transmits a power-off notification indicating that to the playback device when the control unit performs power-off.
The playback device
Reproducing means for reproducing an audio signal based on data recorded on a recording medium;
A reproduction stop notification transmitting means for transmitting a reproduction stop notification indicating that to the amplification device when the reproduction by the reproduction means is stopped ;
A power-off notification receiving means for receiving a power-off notification from the amplification device;
An audio system comprising: control means for turning off the power of the playback device when a power-off notice is received by the power-off notice receiving means . The playback device
Recording means for recording on a recording medium based on the input audio signal;
A recording / reproducing apparatus comprising: a recording stop notification transmission unit configured to transmit a recording stop notification indicating that to the amplification device when recording by the recording unit is stopped;
The amplification device includes:
A recording stop notification receiving means for receiving a recording stop notification from the recording / reproducing apparatus;
2. The audio system according to claim 1, wherein the control unit turns off the power of the amplifying apparatus after a predetermined time has elapsed after receiving the recording stop notification from the recording stop notification receiving unit. A program for causing a computer to function as each means in the audio system according to claim 1. A power supply control method in an audio system comprising a playback device and an amplification device,
In the amplification device,
An amplification step of amplifying an audio signal from the playback device;
A playback stop notification receiving step of receiving a playback stop notification from the playback device;
A control step of turning off the power supply of the amplification device after a predetermined time has elapsed since receiving the playback stop notification in the playback stop notification receiving step ;
A power-off notification step of transmitting a power-off notification indicating that to the playback device when power is cut off by the control step;
In the playback device,
A reproduction step of reproducing an audio signal based on the data recorded on the recording medium;
When stopping reproduction by the reproduction step, a reproduction stop notification transmission step for transmitting a reproduction stop notification indicating that to the amplification device ;
A power-off notification receiving step for receiving a power-off notification from the amplification device;
A power control method for an audio system , comprising: a control step of cutting off the power of the playback device when a power-off notification is received in the power-off notification receiving step .

Images