JPH0991872A - Voice signal and video signal equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute an interlocking operation with external equipment even if any specification for a special interlock control is not mutually set, by judging an ON/OFF state of a power supply of an external equipment connected with an input means and controlling power supply on and off so as to be in the same state as the external equipment. SOLUTION: A MD recorder/player (MD) 30 is connected with a stereo system 40 to build up an audio system, so that MD30 can receive reproduced voice signal from a CD player (CD) 41 through an optical cable OC and can carry out audio dubbing on the MD, and further a reproduced signal AMD of MD 30 can be supplied to a selector/amplifier 45. MD 30 is provided with a control means to be controlled so that, since CD 41 starts optically outputting to OC when its power supply is turned on, MD 30 can detects the ON/OFF state of CD 41 and go into the same ON/OFF state of its power supply as CD 41. Thus, an interlocking operation is also possible between the equipment for which any special interlock specification is not mutually set.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention generally relates to audio / audio
The present invention relates to various audio signal or video signal devices called visual devices.

[0002]

2. Description of the Related Art Various audio signal or video signal devices such as disk players, tape players, radio tuners, TV tuners, video decoders, selectors / amplifiers, etc. are in widespread use, and these devices must be systematized before use. Is commonly practiced. Normally, a form is often adopted in which audio output from a CD (compact disc) player, a tape player, or the like is input to a selector / amplifier, and a speaker is connected from the selector / amplifier.
In addition, reproduction output from a CD player, a tape player, or the like may be supplied to a recording device such as an MD (mini disk) recorder or a tape recorder to enable dubbing recording or the like.

Particularly, when both recording media are digital audio recording media, such as when the reproducing side is a CD and the recording side is a mini disk (hereinafter referred to as MD) or DAT, the reproducing apparatus keeps the digital data form and the recording apparatus side. It is also possible to transmit a signal to the device for dubbing, and this digital dubbing is also widely practiced. An optical cable is used for transmitting digital audio data, for example. Then, on the reproducing device side, the digital audio data read from the recording medium is optically modulated and output. On the recording device side, the optical modulation signal sent by the optical cable is demodulated into an electric signal,
Obtain digital audio data and record it on a recording medium.

[0004]

By the way, a user often uses various audio signal or video signal devices by system-connecting them as described above, but the connected various devices are not always from the same manufacturer. In addition, even if they are from the same manufacturer, they do not necessarily have to be interfaced with control signals for interlocking control. In other words, multiple devices can be connected by a control signal line, and one device has a control function for the other device, and the other device here is designed to accept control from an external device. However, the devices (models) that satisfy such conditions are quite limited.

When a plurality of audio signal or video signal devices are systematized, if the plurality of devices can be interlocked with each other, the usability for the user is greatly improved. For example CD
When the player and the MD recorder are connected, it is preferable to realize the interlocking operation such that the MD recorder side is automatically turned on only by turning on the power of the CD player. It is also conceivable that the playback operation on the playback device side and the recording operation on the recording device side are controlled in conjunction with each other during dubbing recording. However, in order to perform such interlocking control, it is necessary for each device to interface with a control signal. In many cases in which another device is additionally connected to the system owned by, the control signal cannot be transmitted / received, so that there is a problem that interlocked control cannot be realized to improve operability.

[0006]

In view of the above problems, the present invention executes a certain degree of interlocking operation even if the equipments are not equipments for which special specifications for interlocking control are set. The purpose is to be able to. Therefore, the detection means detects the input state of the input means for inputting digital data as audio data or video data. A control means is provided for judging the power on / off state of the external device connected to the input means on the basis of the detection result and controlling the power on / off so that the power source is turned on / off similarly to the external device. To do so. Further, the detection means detects the input of the digital data, and according to the detection result, the control means is provided which can start necessary processing for the digital data input from the input means.

For example, a current general digital data output device (reproducing device, etc.) can output digital data by an optical modulation signal, and can supply the digital data to another device such as a recording device through an optical cable. But,
In this output device, the power is turned on and the light output is turned on. Therefore, on the input device side, the power supply state on the output device side can be confirmed by the presence or absence of optical input.
Further, on the input device side, the execution timing of a predetermined process for the interlocking operation can be determined by detecting the presence / absence of input of transmitted data.

[0008]

DETAILED DESCRIPTION OF THE INVENTION An audio signal or video signal device as an embodiment of the present invention will be described below with reference to FIGS. Here, the audio signal or video signal device of the present invention is MD
The case of a recorder / player will be described as an example in the following order. 1. 1. Audio system having MD recorder / player as an embodiment Configuration of MD recorder / player 3. C for supplying playback data to MD recorder / player
Configuration of D player 4. 4. Power-on interlocking operation in MD recorder / player 5. Power-off interlocking operation in MD recorder / player 6. Interlocking operation during dubbing with MD recorder / player 7. Another example of equipment as an embodiment

1. Audio System Having MD Recorder / Player as Embodiment FIG. 1 shows an MD recorder / player 30 as an embodiment.
2 shows an example of the configuration of an audio system having the above. Here, an example will be given in which the MD recorder / player 30 is connected to the system stereo 40 to construct an audio system.

The system stereo 40 is a CD player 4
1, a tape player 42, a tuner 43 for AM / FM broadcasting, and a selector / amplifier 45.
The CD player 41 performs a reproducing operation on the _CD and supplies the reproduced analog audio signal A _CD to the selector / amplifier 45. The tape player 42 performs a reproducing operation for the cassette tape and supplies the reproduced analog audio signal A _TP to the selector / amplifier 45. The tuner 43 selects from the radio waves received by the antenna 44,
The detection operation and the like are performed and a predetermined broadcast audio signal is output.
Analog audio signal A as output broadcast audio
_{The TU} is supplied to the selector / amplifier 45.

The selector / amplifier 45 selects one of the analog audio signals A _CD , A _TP , and A _TU that is input in accordance with the user's function operation, performs a required amplification process, etc., and performs a speaker unit 46. And output as audio. When the MD recorder / player 30 is connected to such a system stereo 40, the analog audio signal A _MD reproduced from the mini disc in the MD recorder / player 30 is the selector / amplifier 45.
The cord is connected to be input to.

The selector / amplifier 45 has, for example, an input terminal for an external device, and the MD recorder /
The player 30 will be connected. Then, the user selects the external input function in the selector / amplifier 45, so that the MD recorder / player 30
It is possible to output the reproduced sound from the speaker unit 46.

Further, in this example, an optical cable OC is connected so that the audio signal reproduced from the CD player 41 can be dubbed and recorded on the mini disk in the MD recorder / player 30. The CD player 41 converts the audio data read from the CD into an optical signal in the digital data form and outputs it to the optical cable OC. MD recorder /
The player 30 converts the optical signal supplied from the optical cable OC into digital data as the original electric signal again,
The operation of recording the digital data on a mini disk can be performed.

2. Configuration of MD Recorder / Player The configuration of the MD recorder / player 30 will be described with reference to FIG.
For a magneto-optical disk (mini disk: MD) 91,
When a recording operation (digital dubbing recording) of reproduction data from the CD player 41 in FIG. 1 is executed, C
The optical modulation signal output from the D player 41 is supplied to the terminal 1 to which the optical cable OC is connected. The optical modulation signal input to the terminal 1 is demodulated by the photoelectric conversion unit 2 into a digital audio signal as an electric signal.

The demodulated digital audio signal is supplied to the audio compression encoder / decoder section 3 and subjected to audio compression encoding processing. Here, 16-bit quantization,
A digital audio signal of 44.1KHz sampling is compressed into data with a data amount of about 1/5. Further, control information such as a subcode included in the transmitted digital audio signal is extracted and supplied to the system controller 15. Further, the digital audio signal is supplied to the level detecting section 19 so that level information as the audio signal (for example, detection of silence / sound and sound level) is obtained. The level information is supplied to the system controller 15.

The digital audio signal compressed by the audio compression encoder / decoder unit 3 is once written in the buffer memory 5 by the memory controller 4.
Then, when a predetermined amount of data or more is accumulated in the buffer memory 5, the data is read in a predetermined data unit and sent to the encoder / decoder unit 6. The encoder / decoder unit 6 supplies the data, which has been subjected to encoding processing such as CIRC encoding and EFM modulation, as a recording signal to the magnetic head drive circuit 7. The magnetic head drive circuit 7 supplies a magnetic head drive signal to the magnetic head 8 according to the supplied recording signal. That is, the magnetic head 8 applies the magnetic field of N or S to the MD 91.

The digital audio signal is written in the buffer memory 5 at a bit rate according to the transmission speed of the digital audio signal from the CD player 41, but the digital audio signal is read from the buffer memory 5 by It is done at a faster rate.
That is, after waiting for a predetermined amount or more of data to be stored in the buffer memory 5, the stored data is M
The operation of recording in D91 is performed. Therefore, the operation of actually recording data on the MD 91 is intermittently performed according to the amount of data stored in the buffer memory 5.

During such recording, the MD 91 is rotationally driven by the spindle motor 9. The optical head 10 is provided on the opposite side of the magnetic head 8 and the MD 91.
Is provided, and high-level laser output for heating the recording track to which the magnetic field is applied by the magnetic head 8 to the Curie temperature is performed. The optical head 10 and the magnetic head 8 can be moved in the disk radial direction by a sled mechanism 11.

The reflected light information read from the optical head 10 during recording is supplied to the RF amplifier 12. The RF amplifier 12 extracts a tracking error signal, a focus error signal, groove information, etc. from the supplied information. The groove information is absolute position information recorded in the MD 91 as a pre-groove (wobbling groove), and this groove information is supplied to the address decoder 14 to determine the address of the recording location. The address information is supplied to the system controller 15 and used for various control operations. That is, the system controller 15 controls each unit based on the address information and the subcode information extracted from the transmitted digital audio signal to execute the recording operation.

Further, the tracking error signal and the focus error signal are supplied to the servo circuit 13, and the servo circuit executes the focus servo, the tracking servo, and the sled servo based on this. Also, spindle rotation information can be obtained from the clock extracted from the groove information,
This produces a spindle error signal. The spindle error signal is supplied to the servo circuit 13, and the servo circuit 13 controls the spindle motor 9 to a constant linear velocity (CLV) based on this.

The operation unit 17 is provided with various keys such as a recording key, a reproduction key, a search key, and a stop key, which are used for user operations. The operation information is supplied to the system controller 15. The display unit 18 is composed of, for example, a liquid crystal display, and performs an operation of displaying an operating state, a track number, time information and the like under the control of the system controller 15. Also, the system controller 15
Is displayed on the display unit 1 using the level information from the level detection unit 19.
The input level (recording signal level) can also be displayed at 8.

The data transmitted by the optical cable OC is also supplied to the optical input PLL circuit 16. The transmitted data includes not only audio data but also control data such as a synchronizing signal. However, the optical input PLL circuit 16 extracts, for example, a synchronizing signal and injects it into the PLL circuit to synchronize with the supplied data. Generate the clock. This clock is supplied to necessary parts via the system controller 15 and is used for various signal processing for the input digital audio signal.

By the way, the CD player 41 is adapted to start optical output when the power is turned on. That is, the optical signal is input from the terminal 1 even during the reproducing operation. Since the optical input PLL circuit 16 performs the PLL lock operation based on the synchronizing signal in the optical signal, the system controller 15 causes the optical input PL circuit to operate.
By detecting the PLL lock state in the L circuit 16, it is possible to detect ON / OFF of the power source of the CD player 41.

MD in MD recorder / player 30
When the reproducing operation of 91 is performed, the MD 91 is rotationally driven at a constant linear velocity by the operation of the spindle motor 9 similar to the above-described recording, and the data is read by the optical head 10. However, the laser output level from the optical head 10 is controlled to a low level for reproduction. The focus, tracking, and sled servo controls are performed in the same manner as during recording.

From the data corresponding to the reflected light read by the optical head 10, reproduction data (EFM modulation data) is extracted by the RF amplifier 12 and supplied to the encoder / decoder section 6. E in the encoder / decoder section 6
Decoding processing such as FM demodulation and CIRC decoding is performed. Then, the decoded data is temporarily stored in the buffer memory 5 via the memory controller 4. Then, it is read from the buffer memory 5 at a predetermined timing and supplied to the audio compression encoder / decoder unit 3.

In the voice compression encoder / decoder section 3,
Decompression processing for audio compression is performed to restore digital audio signals with 16-bit quantization and 44.1KHz sampling. This digital audio signal is converted into an analog audio signal in the D / A converter 20, and the amplifier 2
After the required amplification processing is performed at 1, the reproduced analog audio signal _AMD is output from the terminal 22. That is, in the example of FIG. 1, the analog audio signal _AMD is supplied to the selector / amplifier 45.

3. Configuration of CD Player for Supplying Playback Data to MD Recorder / Player FIG. 3 shows a CD player 4 in the system stereo 40 of FIG.
1 is a block diagram. The CD 90 loaded at the reproducing position in the CD player 41 is driven by the spindle motor 52 at the constant linear velocity (CL) during the reproducing operation.
It is rotationally driven by V). Then, the data recorded in the pit form on the disc 90 is read by the optical head 53 and supplied to the RF amplifier 55. RF amplifier 5
The output of 5 is supplied to the decoder 57 and the servo circuit 56.

The servo circuit 56 generates various servo drive signals for focus, tracking, sled, and spindle from the focus error signal and tracking error signal from the RF amplifier 53, the spindle error signal from the decoder 7 and the like to perform servo operation. Let it run.

The optical head 53 is equipped with a laser diode as a laser output means, an optical system including a polarization beam splitter and an objective lens, and a detector for detecting reflected light. The objective lens has a biaxial mechanism. It is held so as to be displaceable in the disk radial direction (tracking direction) and in the direction coming in and out of contact with the disk (focusing direction), and focus servo operation and tracking servo operation are enabled. The entire optical head 53 can be moved in the disk radial direction by a sled mechanism 54.

The servo circuit 56 generates a servo drive signal based on the supplied tracking error signal and focus error signal and controls the biaxial mechanism and the sled mechanism 4 to perform focus and tracking for reproduction operation by the optical head 53. You will be in control. Further, the biaxial mechanism and the sled mechanism 54 are controlled based on a track jump command and an access command from the system controller 61 configured by a microcomputer to execute the access operation of the optical head 53 and the like. Further, the spindle motor 52 is controlled to a constant linear velocity (CLV) based on the spindle error signal.

The reproduced RF signal obtained by the RF amplifier 55 is supplied to the decoder 57. The decoder 57 performs processing such as EFM demodulation, CIRC decoding, and deinterleaving, and decodes the information read from the disk 90 into a form as a digital audio signal of 16-bit quantization and 44.1 KHz sampling. The digital audio signal output from the decoder 57 is converted into an analog audio signal by the D / A converter 58, and is output from the terminal 60 via the amplifier circuit 59. In the case of the example in FIG. 1, the analog audio signal A _CD is supplied to the selector / amplifier 45.

The digital audio signal output from the decoder 57 is also supplied to the optical modulator 62. The optical modulator 62 generates an optical signal modulated by the digital audio signal and outputs it as an optical digital signal from the terminal 63. For example, it emits red light of 660 nm. Terminal 63
Is connected to an optical cable OC, and the optical cable OC transmits a digital audio signal as an optical modulation signal to the terminal 1 of the MD recorder / player 30 shown in FIG. In the above-described MD recorder / player 30 of FIG. 2, the photoelectric conversion unit 2 and the light input PLL circuit 16 are operated for the 660 nm red light input from the terminal 1.

Various operations during reproduction are controlled by the system controller 61. For example, operations such as reproduction start, end, track access, fast forward reproduction, and fast reverse reproduction are realized by the system controller 61 controlling the operations of the servo circuit 56 and the optical head 53.

Further, the system controller 61 controls the optical modulator 62 to turn on / off the optical digital output. The output of the optical signal is continuously performed while the power of the CD player 41 is turned on. That is, when the CD player 41 is powered on, the system controller 61
Issues an operation command to the light modulator 62, and the light emission output from the terminal 63 is started. This light emission output ends when the power of the CD player 41 is turned off. Note that there is no audio data supplied to the optical modulator 62 while the reproducing operation is not performed, and therefore, silent data is output as the optical data as an optical signal.

The operation section 64 is provided with operation keys for the user to perform various operations. For example, a reproduction key, a track access key, a stop key, etc. are formed. The system controller 61 controls each unit according to the operation information from the operation unit 64 and the control program stored in the internal ROM. The display unit 65 is formed of, for example, a liquid crystal display,
At the time of reproduction, the disc number, the track number, the reproduction progress time, the operation state, etc. are displayed under the control of the system controller 11.

4. Power-on interlocking operation in MD recorder / player The interlocking operation executed in the MD recorder / player 30 connected to the CD player 41 by the optical cable OC will be described below. First, the CD player 41 is powered on. The operation of the MD recorder / player 30 in response to being turned on will be described with reference to FIGS. 4 and 5.

It is assumed that the MD recorder / player 30 is in the power standby state in which the power outlet is connected to the commercial power source. In this state, the system controller 1
5 performs the processing of FIG. When in the power standby state as step F100, the system controller 15
Monitors the locked state of the optical input PLL circuit 16 (F101). Since there is no light input from the terminal 1 while the power source of the CD player 41 is off, the light input PLL circuit 16 is naturally in the unlocked state.

However, when the power of the CD player 41 is turned on, the light input from the terminal 1 is started, and in response to this, the light input PLL circuit 16 performs an operation to lock the PLL circuit. Then, at some point, the PLL lock is completed. When the system controller 15 detects this PLL lock state, the process proceeds to step F102 and the process of turning on the power of the MD recorder / player 30 is performed.

FIG. 5 shows the timing of this operation. FIG.
As shown in FIG. 5A, the power of the CD player 41 is turned on at time t ₀ and the operation of the optical input PLL circuit 16 is started from the time when the optical input from the terminal 1 is started. It is assumed that the PLL lock is completed at time t ₁ . At time t ₂ when the PLL lock state is detected, the system controller 15 performs a process of turning on the power of the MD recorder / player 30 as shown in FIG. 5C.

By performing such an operation in the MD recorder / player 30, for example, the system stereo 40
When the CD player 41 is turned on by the power operation on the side, the MD recorder / player 30 is automatically turned on, and the user does not have to operate the power on the MD recorder / player 30 side.

5. Power-off linked operation in MD recorder / player Next, the operation of the MD recorder / player 30 when the power of the CD player 41 is turned off will be described with reference to FIGS. 6 and 7. When the MD recorder / player 30 is in the power-on state, the system controller 15 is performing the processing shown in FIG. That is, when the power is on in step F200, the system controller 15 determines that the optical input PLL
The lock state of the circuit 16 is monitored (F201).

While the power of the CD player 41 is on, the optical input PLL circuit 16 keeps the locked state according to the light input from the terminal 1, but when the power of the CD player 41 is off, The light input from the terminal 1 is interrupted, and the PLL circuit of the light input PLL circuit 16 is unlocked. When the system controller 15 detects that the PLL circuit is in the unlocked state as described above, the process proceeds to step F202, and the process of turning off the power of the MD recorder / player 30 is performed.

The power of the CD player 41 is determined to be off according to the fact that the PLL circuit is unlocked. However, the PLL circuit is temporarily stopped for some reason such as disturbance of transmitted data or noise. In order to prevent the CD player 41 from being erroneously determined that the power has been turned off in the case where the CD player 41 is in the unlocked state, the process is performed only when the unlocked state continues for a certain period of time, for example. It is preferable to take a misjudgment preventing means such as advancing to step F202. Alternatively, instead of monitoring the locked state of the PLL circuit, a unit for monitoring the presence or absence of the light input itself may be provided, and the process may proceed to step F202 when the light input is lost.

FIG. 7 shows the timing of the operation of FIG.
As shown in FIG. 6A, it is assumed that the power of the CD player 41 is turned off at time t ₁₀ and the light input from the terminal 1 is interrupted.
In response to this, the operation of the optical input PLL circuit 16 is shown in FIG.
It becomes an unlocked state like. When the system controller 15 detects the PLL unlocked state, it confirms that the unlocked state continues for a certain period of time after that, and for example, at time t ₁₁ , MD as shown in FIG.
A process of turning off the power of the recorder / player 30 is performed.

By performing such an operation in the MD recorder / player 30, for example, the system stereo 40
If the power supply is operated on the side and the CD player 41 is turned off, the MD recorder / player 30 is automatically turned off in conjunction with this, and in this case also, the user needs to operate the power on the MD recorder / player 30 side. Disappears.

6. Interlocking operation during dubbing by MD recorder / player Next, from the CD player 41 to the MD recorder / player 3
The operation of the MD recorder / player 30 when performing dubbing recording to 0 will be described with reference to FIGS. 8 and 9. At the time of dubbing recording, the user may first perform an operation of recording standby (operation of making a recording pause state) with the MD recorder / player 30, and then perform a reproduction operation with the CD player 41. When the recording standby operation is performed in the MD recorder / player 30, the system controller 15 carries out the processing from step F301 to F302 in FIG.

That is, in step F302, the audio compression encoder / data is obtained as data demodulated from the input optical signal.
The data output from the decoder 3 is started to be taken into the buffer memory 5. Actually, at this timing, the CD player 41 side may not yet perform the reproducing operation, that is, it may be the silent data, but the data is taken into the buffer memory 5 from the recording standby time.

Then, in step F303, the system controller 15 monitors the level information from the level detector 19, and when the input of voiced data is detected as the voice data, the process proceeds to step F304 and the buffer memory The operation of reading the data from No. 5 and the recording operation to the MD 91 are started. It should be noted that the data taken into the buffer memory 5 at a time point slightly before the time point when the input of voiced data is detected is read from the buffer memory 5 as the leading data.

FIG. 9 shows the timing of this operation. C
Since the power of the D player 41 is on, the light input is continuously performed as shown in FIG. If the user performs the recording standby operation at time t ₂₀ , the data acquisition to the buffer memory 5 is started as shown in FIG. 9C. At this point, if no voice data is input as voiced data as shown in FIG. 9B, the silence data is taken into the buffer memory 5.

At time t _{20 and} thereafter, the user performs a reproducing operation on the CD player 41 side, and at time t ₂₁ , FIG.
It is assumed that a digital audio signal such as music has been supplied as described above. When this is detected by the level information from the system controller 15, for example, at the time point t ₂₂ , control is performed to cause each unit to start recording. That is, the reading of data from the buffer memory 5 is started, the read data is processed by the encoder / decoder unit 6, and the MD 91 is recorded by the magnetic head 8.
Further, the optical head 10 is caused to execute the laser light output at the recording level.

Here, as shown in FIGS. 9C and 9D, t
_{At the 22nd} time point, at least the data fetched at the t ₂₁ time point (or a time point slightly before that) may be read from the buffer memory 5. That is, since the data in the figure is the first voiced data, at least the data from this data is recorded. By doing so, the beginning portion of the data to be recorded does not become unrecordable. Further, since reading from the buffer memory 5 to recording on the MD 91 is performed at a high rate, as shown as data in the figure,
The data continuously supplied from the CD player 41 and taken into the buffer memory 5 is read out and recorded intermittently.

By the MD recorder / player 30 performing such an operation, the MD recorder / player 30 performs a recording standby operation during dubbing.
There is no need for the user to perform a troublesome and difficult operation such as starting the recording of the MD recorder / player 30 at the timing immediately after the reproduction operation is performed on the CD player 41, and the timing for starting the recording is incorrect. There is no need to fail in dubbing.

Although the input start timing of the voice data is detected by the level information, the input start timing can be detected more accurately if, for example, the subcode extracted from the input data is monitored. Therefore, the subcode may be monitored to set the recording start timing.

7. Other Device Examples as Embodiments The embodiments have been described above, but the present invention can be further applied to various devices and connection modes. For example, although an example of connecting with an optical cable has been described, even in the case of connecting with a coaxial cable, various interlocking operations can be performed by monitoring the input status of the digital data.

Not only MD recorder / player, but also D
AT (Digital Audio Tape) recorder, CD-G
Decoder, MPEG decoder, D / A converter, etc.
Can be added to an audio / visual system,
The present invention can be applied to any device that receives input of digital data from another device. For example, MPEG decoder and D
/ A converter, etc. is connected to the playback device (video C
The power supply of the D player, the CD player, etc.) can be controlled to be interlocked according to the on / off of the power supply, and operations such as decoding can be automatically started.

[0056]

As described above, in the audio signal or video signal equipment of the present invention, the detection means determines the power-on / off state of the external equipment connected to the input means, and the power-on equipment similar to the external equipment is turned on. / Power on / off so that
Since the control means for performing the off control is provided, the interlocking control of the power source becomes possible when connected as the audio / video system, and the user's operation is greatly simplified and the usability is improved. Of course in this case,
It is not necessary to connect a dedicated control line, and there is no limit to the devices that can be interlocked. For example, there is no problem when the system is upgraded with equipment of different manufacturers.

Further, control means is provided which can detect the input of digital data by the detection means and start necessary processing for the digital data input from the input means in accordance with the detection result. By doing so, for example, the recording operation and the decoding operation can be controlled in conjunction with the connected output device, and there is an effect that the user's operation becomes simpler and more reliable without operation error.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an audio system having an MD recorder / player according to an embodiment of the present invention.

FIG. 2 is a block diagram of an MD recorder / player according to an embodiment.

FIG. 3 is a block diagram of a CD player connected to the MD recorder / player of the embodiment.

FIG. 4 is a flowchart of a power-on interlocking operation according to the embodiment.

FIG. 5 is an explanatory diagram of a power-on interlocking operation according to the embodiment.

FIG. 6 is a flowchart of a power-off interlocking operation according to the embodiment.

FIG. 7 is an explanatory diagram of a power-off interlocking operation according to the embodiment.

FIG. 8 is a flowchart of an interlocking operation during dubbing according to the embodiment.

FIG. 9 is an explanatory diagram of an interlocking operation during dubbing according to the embodiment.

[Explanation of symbols]

 1 terminal 2 photoelectric conversion unit 3 audio compression encoder / decoder unit 4 memory controller 5 buffer memory 6 encoder / decoder unit 7 magnetic head drive circuit 8 magnetic head 10 optical head 15 system controller 16 optical input PLL circuit 19 level detection unit 30 MD recorder / Player 41 CD player

Claims (2)

[Claims] 1. Input means capable of inputting digital data as audio data or video data, detection means for detecting an input state of the input means, and the input means according to a detection result of the detection means. Control means for determining the power on / off state of an external device connected to the power supply and controlling the power on / off so that the power source is turned on / off in the same manner as the external device. An audio signal or video signal device characterized by. 2. An input unit capable of inputting digital data as audio data or video data, a detection unit detecting an input of digital data from the input unit, and a detection result obtained by the detection unit, An audio signal or video signal device comprising: a control unit capable of starting necessary processing for digital data input from the input unit.