JPH0991851A - Reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adequately set the intervals between musics of sound recording by stopping light output for the period when the reading-out of the next music is possible after the completion of reading-out of certain music, thereby temporarily stopping the sound recording operation on a sound recorder side during this period. SOLUTION: A changer section 1 selects a desired CD 90 and carries this DC to the reproduction position of a player. The information on the music programs read out of an optical head 3 is converted in a decoder 7 into digital audio signals of 16-bit quantizing and 44.1kHz sampling, and sent to an optical modulation section 12. This optical modulation section 12 transmits an optical modulation signal via an optical cable to another sound recorder for digital dubbing. This digital sound recorder automatically attains the temporary stop state in the period when there is no light input in sound recording mode. At this time, a system controller 11 stops the delivery of the light signals in the period when a changer section 1 makes the operation to change the CD.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio signal reproducing apparatus such as a CD (Compact Disc) player or a tape player.

[0002]

2. Description of the Related Art In many cases, a recording device dubbs music reproduced from a reproducing device such as a CD player onto another recording medium. For example, a mini disk recorder using a magneto-optical disk, a cassette tape recorder using a magnetic tape, a DAT (digital audio tape) recorder, etc. are used for dubbing recording.

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, when performing such dubbing recording, it is desirable that the length of the silent portion between the music pieces is an appropriate length on the recording medium to be recorded. Normally, when dubbing a plurality of music pieces recorded on a CD to the MD or DAT as they are, there is no problem because the length between the music pieces recorded on the CD is the same.

However, when CD changer players have become popular as in recent years and music can be selectively reproduced from a plurality of CDs, inconvenience may occur during dubbing. For example, consider that the user performs a program reproduction such that a user selects an arbitrary music piece from a plurality of CDs stored in a CD changer player and reproduces the music piece in order, and at this time, the dubbing is performed on the recording device side.

It is assumed that two music pieces (music piece A and music piece B) continuously reproduced in this program reproduction are recorded on different discs. FIG. 5 shows the dubbing operation at this time. Up to time t ₁₁ in FIG. 5, a certain CD in the CD changer player
It is assumed that the song A is being played back, and the played digital audio signal is supplied to the MD recorder connected by the optical cable and recorded in the MD.

[0007] Figure 5 in until t ₁₁ time (a) is shown a state in which digital audio signals as track A is read off the CD, also in FIG. 5 (b), the digital audio signal is optically modulated Is output. Further, FIG. 5D shows a recording operation state on the MD recorder side, and since the recording operation is turned on, the digital audio of the song A reproduced from the CD as shown in FIG. 5E. The signal will be recorded on the MD.

When the reproduction of the song A ends at time t ₁₁ , the CD changer player determines that the next song to be reproduced is another CD.
According to what is said to be song B recorded in
The CD exchange operation is performed as shown in FIG. This exchange operation takes, for example, 5 to 10 seconds, and longer in some cases, but it is assumed that loading of a new CD is completed at t ₁₂ . Then, the CD changer player performs servo system processing such as spindle rotation, focus search, focus servo-on, tracking servo-on, and spindle servo-on as start-up processing for the reproducing operation from the time t ₁₂ . When the start-up process is completed and the data can be read from the CD, first, the T recorded on the innermost side of the CD is recorded.
Read OC information. Then, when the TOC information is read and the addresses and the like of the respective music pieces recorded are grasped, access is made to the position of the music piece B that is required to be reproduced.
When access is completed at t ₁₃ time, this time can be the first time to reproduce the song B, and start playback from the t ₁₃ time, as shown in FIG. 5 (a) of the song B.

While the processing accompanying the disk exchange is being performed, the optical output remains on as shown in FIG. 5C, that is, during this period, the silent data is optically modulated and the MD recorder. Will have been sent to. And
Since the recording operation is continued in the MD recorder as shown in FIG. 5D, the reproduction of the music B is started from the time t ₁₁ t.
Up to the _13th point, the silent state is recorded as shown in FIG.

For this reason, as the recorded data on the MD, a long silent portion of, for example, 10 seconds or more occurs between the song A and the song B, which is unnatural and ill-formed when the MD is reproduced. Will be. For example, when the user collects and records favorite songs, the interval between the songs becomes very long and the atmosphere is distracted when listening.

To solve such a problem, for example, M
The operation of the recording device such as a D recorder can be controlled from the reproducing device (CD changer player) side, and for example, a process of temporarily stopping the recording when the disc is exchanged may be performed. However, for this purpose, it is necessary to connect a cable for supplying a control signal in addition to the optical cable, which causes a problem that the connection between both devices is complicated and troublesome. Of course, the playback device side must have a control function for such a recording device side, and the recording device side must accept the control from the playback device side. It is limited and not general.

The above problem occurs not only when the disc is exchanged, but also when the period during which the data is silent becomes longer due to the access operation of the music to be reproduced. Therefore, this is a problem that occurs even when the reproducing side is not a so-called changer type. Furthermore, the playback device side is DA
Similar problems occur in the case of using other recording media such as T player and DAT changer player.

[0013]

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a recording device in which the reproduction interval is long on the reproduction device side without connecting a special control cable. The purpose is to temporarily stop the recording operation on the side and prevent improper recording.

Therefore, as the reproducing apparatus, the output operation of the optical output means is turned off from the time when the reading of a certain program as the audio data is completed in the data reading means until the next program can be read. It is equipped with a control means capable of controlling. In addition, the control means controls the data reading means to start the audio data reading operation of the data reading means after a predetermined time period since the next program can be read and the output operation of the light output means is turned on. .

In the current general digital data recording device, it is possible to input digital data through an optical cable. The operation of recording digital data from this optical cable is to temporarily stop when the optical input is lost. It is supposed to be in a state. Therefore, from the reproducing device side, it is possible to perform the pause control of the recording operation on the recording device side by turning on / off the optical output. Also,
In this way, when the optical output is turned off and the recording operation on the recording device side is paused, when the optical output is turned on and recording is resumed, for example, a pause is sent, and then silent data is sent for a predetermined time, and then If the output of the audio data is started, the length between songs can be set on the recording medium.

[0016]

DETAILED DESCRIPTION OF THE INVENTION A reproducing apparatus as an embodiment of the present invention will be described below with reference to FIGS. The operation of the reproducing apparatus will be described by taking as an example the case where the reproducing apparatus is a CD changer player and the reproduced data from the CD changer player is dubbed and recorded on the MD recorder.

FIG. 1 is a block diagram of a CD changer player as a reproducing apparatus of this example. The CD changer player is provided with a changer unit 1 for storing a plurality of CDs 90 and loading the selected CDs 90 to the reproduction position. Although not shown in FIG. 1, the changer unit 1 has a portion for accommodating a CD 90,
A transport mechanism for transporting the CD 90 between the reproduction position and the storage section is formed.

CD 90 loaded at the playback position
Is driven to rotate at a constant linear velocity (CLV) by the spindle motor 2 during the reproducing operation. Then, the data recorded in the pit form on the disc 90 is read by the optical head 3 and supplied to the RF amplifier 5. R
The output of the F amplifier 5 is supplied to the decoder 7 and the servo circuit 6.

The servo circuit 6 uses the focus error signal and tracking error signal from the RF amplifier 3 and the spindle error signal from the decoder 7 to focus and
Generates various servo drive signals for tracking, sled, and spindle to execute servo operation.

The optical head 3 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 3 can be moved in the disk radial direction by the sled mechanism 4.

The servo circuit 6 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 3. You will be in control. A system controller 11 including a microcomputer
The biaxial mechanism and the sled mechanism 4 are controlled on the basis of the track jump command and the access command from the optical head 3 and the access operation of the optical head 3 is executed. Further, the spindle motor 2 is driven at a constant linear velocity (C
LV) is controlled.

The reproduced RF signal obtained by the RF amplifier 5 is supplied to the decoder 7. In the decoder 7, EFM demodulation, C
The information read from the disk 90 is subjected to processing such as IRC decoding and deinterleaving, and decoded 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 7 is converted into an analog audio signal by the D / A converter 8,
The signal is output from the terminal 10 via the amplifier circuit 9. For example, it is supplied to a speaker or a headphone output terminal via a volume adjusting circuit and an amplifying circuit, and is output as voice or can be supplied to another device as an analog line output.

The digital audio signal output from the decoder 7 is also supplied to the optical modulator 12. The optical modulator 12 generates an optical signal modulated by a digital audio signal and outputs it as an optical digital signal from the terminal 13. An optical cable is connected to the terminal 13, and a digital audio signal is transmitted as an optical modulation signal to another recording device by this optical cable.

Various operations during reproduction are controlled by the system controller 11. For example, for operations such as reproduction start, end, track access, fast forward reproduction, and fast reverse reproduction, the system controller 11 causes the servo circuit 6 and the optical head 3 to operate.
It is realized by controlling the operation of. The system controller 11 also controls the operation of the CD changer player 1 so as to load the CD 90 selected by the user. Further, the system controller 11 can control the optical modulator 12 to turn on / off the optical digital output.

The operation section 14 is provided with operation keys for the user to perform various operations. For example, a disc selection key, a reproduction key, a track access key, a stop key, etc. are formed. Also loaded CD9
0, or target all CD90s housed in the changer unit 1, program operation keys for setting the program to play the desired songs in order, and the songs specified by the system controller at random. Such as shuffle operation keys to instruct the operation to be played
Operation keys for special playback are also prepared.

The system controller 11 controls each unit according to the operation information from the operation unit 14 and the control program stored in the internal ROM. The display unit 15 is formed of, for example, a liquid crystal display or the like, and the system controller 11 displays the disc number, the track number, the playback progress time, the operating state, and the like during playback.
Display based on the control of.

An MD recorder using a magneto-optical disk (mini disk) as a recording medium is taken as an example of a recording apparatus capable of dubbing recording by connecting to such a reproducing apparatus (CD changer player) with an optical cable. The configuration will be described with reference to FIG. In addition, MD
A recorder is generally a device that can also perform playback operations,
FIG. 2 shows only a portion for recording operation.

When the recording operation (digital dubbing recording) is performed on the MD 91, the optical modulation signal output from the terminal 13 in the CD changer player of FIG. 1 is supplied to the terminal 21 to which the optical cable is connected. It The optical modulation signal input to the terminal 21 is demodulated in the photoelectric conversion unit 22 into a digital audio signal as an electric signal. The demodulated digital audio signal is supplied to the audio compression encoder 23 and subjected to audio compression encoding processing. Here, a digital audio signal of 16-bit quantization and 44.1 KHz sampling is compressed into data having a data amount of about 1/5.

The digital audio signal compressed by the audio compression encoder 23 is once written in the buffer memory 25 by the memory controller 24. Then, when a predetermined amount or more of data is accumulated in the buffer memory 25, the data is read in a predetermined data unit and sent to the encoder 26. The encoder 26 supplies the data, which has been subjected to encoding processing such as CIRC encoding and EFM modulation, to the magnetic head drive circuit 27 as a recording signal.

The magnetic head drive circuit 27 supplies a magnetic head drive signal to the magnetic head 28 in accordance with the supplied recording signal. That is, the magnetic head 28 is caused to apply the magnetic field of N or S to the MD 91.

At the time of recording, the MD 91 is rotationally driven by the spindle motor 29. And the magnetic head 28
An optical head 30 is disposed on the opposite side of the MD 91 and the MD 91, and a high level laser output for heating the recording track to which the magnetic field is applied by the magnetic head 28 to the Curie temperature is provided. The optical head 30 and the magnetic head 28 are movable in the disk radial direction by a sled mechanism 31.

The reflected light information read from the optical head 30 during recording is supplied to the RF amplifier 32. The RF amplifier 32 extracts a tracking error signal, a focus error signal, groove information, etc. from the supplied information. The groove information is absolute position information recorded as a pre-groove (wobbling groove) in the MD 91, and this groove information is supplied to the address decoder 34, and the address of the recording location is determined. The address information is supplied to the system controller 35 and used for various control operations. The system controller 35 controls each unit to execute a recording operation.

Further, the tracking error signal and the focus error signal are supplied to the servo circuit 33, 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 33, and the servo circuit 33 controls the spindle motor 29 to a constant linear velocity (CLV) based on this.

The operation section 37 is provided with various keys such as a recording key and a stop key which are used for user operation. The operation information is supplied to the system controller 35. The display unit 38 is composed of, for example, a liquid crystal display, and performs an operation of displaying an operation state, a track number, time information and the like under the control of the system controller 35.

An optical input detector 36 is provided at the portion of the terminal 21 to which the optical cable is connected. This is a part for detecting the presence or absence of the input of the optical modulation signal, that is, detecting whether or not the optical cable is connected and the optical modulation signal is transmitted and output from the reproducing apparatus of FIG. 1 (presence or absence of the input light). To do. This detection information is supplied to the system controller 35.

The system controller 35 can control the recording operation using this detection information. In the case of performing digital dubbing recording, the time when there is no optical input is the time when there is no digital data input. Therefore, for example, when the optical input is lost during recording, it can be determined that the data output on the reproducing side has ended, and the recording operation is automatically paused accordingly.

In the CD changer player of FIG. 1, a plurality of CDs 90 housed in the changer unit 1
The process at the time of disc exchange of the CD changer player will be described by taking as an example the case where the user selects an arbitrary music piece from among the selected music pieces and performs the program reproduction for reproducing the music piece in order, and dubbing is performed by the MD recorder of FIG. 2 at this time. 3 and 4
Will be described.

It is assumed that two music pieces (music piece A and music piece B) continuously reproduced in this program reproduction are recorded on different CDs 90. Therefore, when the reproduction of the music A is finished and the reproduction of the music B is performed next, the disc exchange operation is required. The processing of the system controller 11 at this time is shown in FIG. 3, and the operation based on the processing is shown in FIG.

Up to time t ₀ in FIG. 4, it is assumed that a CD is loaded in the CD changer player and the digital audio signal as the music A is reproduced by the operation from the optical head 3 to the decoder 7.
The reproduced digital audio signal as the music A is converted into an optical modulation signal by the optical modulator 12, and is supplied to the MD recorder by an optical cable connected to the terminal 13. Then, in the MD recorder, the optical modulation signal input from the terminal 21 is demodulated by the photoelectric conversion unit 22 into a digital audio signal as an electric signal, which is supplied to the circuit system from the audio compression encoder 23 to the magnetic head 28 described above, and is supplied to the MD 91. It will be recorded.

By the time t _{0 in} FIG. 4A, song A
4B shows a state in which the digital audio signal is read from the CD 90, and FIG. 4B shows a state in which the digital audio signal is optically modulated by the optical modulator 12 and output. Further, FIG. 4 (e) shows a recording operation state on the MD recorder side, and since the recording operation is turned on, as shown in FIG.
The digital audio signal of song A reproduced from 90 is M
It is recorded in D91.

When the reproduction of the music A ends at time t ₀ , the CD changer player determines that the music to be reproduced next is another CD.
According to what is said to be song B recorded in
The replacement operation of the CD 90 is performed as shown in (c).

In this exchange operation, the CD 90 containing the music A that has been loaded up to that time is unloaded and returned to the predetermined storage position, the CD 90 containing the music B is taken out from the storage position, and the optical head 3 is moved. Load in position. For this operation, for example, 5 to 10
Seconds, and sometimes longer. Further, when loading is completed, servo system processing such as spindle rotation, focus search, focus servo on, tracking servo on, and spindle servo on is performed as a start-up process for reproduction operation. When the start-up process is completed and the data can be read from the CD, the TO recorded on the innermost side of the CD is first.
Read C information. Then, when the TOC information is read and the addresses and the like of the respective music pieces recorded are grasped, access is made to the position of the music piece B that is required to be reproduced. After this series of operations, the music B can be reproduced.

In order to execute the above replacement operation, the system controller 11 performs the control shown in FIG. At time t ₀ , the reproduction of the song A ends, and the CD 90
When the exchange operation of (1) is started, the system controller 11 first controls the optical modulator 13 to turn off the optical output (F101). A state in which the optical output is turned off at the time point t ₀ is shown in FIG.

Then, the changer unit 1 is controlled to execute the disk exchange operation (F102). FIG.
As shown in (c), it is assumed that the disk exchange operation started by the control of step F102 at time t ₀ is completed at time t ₁ . Then, the process of the system controller 11 proceeds from step F103 to F104. Then, the servo circuit 6 and the optical head 3 are caused to execute a start-up operation, and upon completion of the start-up, control is performed so that the TOC data on the innermost circumference side of the disk is read.

Assuming that the TOC reading is completed at time t _{2 in} FIG. 4, the system controller next proceeds to step F105.
The playback operation of the CD 90 is set to a pause (pause) state. This operating state is shown in FIG. Then, in the reproduction pause state, the optical head 3 is accessed to the reproduction position of the music B in step F106.

Assume that the access is completed at time t ₃ and the optical head 3 is ready to reproduce the song B. At this time, the process of the system controller 11 is step F107.
From F to F108, control is performed to start the optical output to the optical modulator 12. This results in t ₃ as shown in FIG.
The optical output is turned on from the time point. However, even the reproduction pause state is continued t ₃ after the time point as shown in FIG. 4 (d), the 4
Since the digital audio signal is not read out as in (a), the optical modulator 12 supplies the silent data as an optical signal to the MD recorder.

In the system controller 11, step F1
At 08, the optical output is turned on and, at step F109, the internal timer T _BL starts counting. The timer T _BL is set so as to time out at an appropriate time as the inter-track time, for example, about 5 seconds.

In step F110, the timer T _BL waits until the time is over, and when the time is over,
Proceed to step F111 to cancel the playback pause state and start song B
To start playing. For example, when the time is over at time t ₄ , the reproduction pause is released as shown in FIG. 4D, and the reproduction of the digital audio signal of the music B from the CD 90 is started as shown in FIG. 4A. The reproduced digital audio signal is transmitted to the MD recorder side because the optical output is on.

The recording state on the MD recorder side controlled by the operation of such a CD changer player is shown in FIGS. Song A until t ₀
Since a digital audio signal as is input, it is recorded in the MD 91. However, when the disc is exchanged at the time point t _0, as described above, the CD
The light output is turned off on the changer player side.

In the MD recorder of FIG. 2, when the optical input detector 36 detects that the optical input is turned off, the system controller 35 temporarily stops the recording operation. Therefore, as shown in FIG. 4 (e), the recording operation is in the pause state at time t ₀ , and this continues until time t ₃ when the optical output is restarted on the CD changer player side.

When the optical input detector 36 detects that the optical input is turned on at time t ₃ , the system controller 35 restarts the recording operation. However, at this time, since the CD changer player is in the reproduction pause state as shown in FIG. 4D, the digital audio signal input until the time point t ₄ is a so-called silent signal, and the MD 91
Is recorded in the silence. This state continues until t ₄ when the timer T _BL times out, and t
_{From the 4th} time point, since the digital audio signal as the music B is input, the data is recorded in the MD 91.

With such a recording operation, the MD 91
The silent part between the recorded song A and song B is the CD
Even if the changer player exchanges the disc, it does not become unnecessarily long. Further, the silent portion between the songs A and B is recorded only for the time based on the timer T _BL , that is, the length between the songs recorded from the CD changer player side by the timer T _BL is adjusted to a suitable length. It will be possible. For this reason, not only is it possible to eliminate the occurrence of an unnecessarily long inter-track portion on the recorded MD 91, but also dubbing with a better appearance is realized.

Note that the CD changer player not only performs the processing shown in FIG. 3 only when the disc is replaced, but also when, for example, after playing a certain song, accessing another song recorded on the CD 90. By performing the processing as shown in FIG. 3, that is, turning off the optical output and performing the reproduction pause, the length between songs on the recording side can be adjusted regardless of the time required for access. For example, at the start of access, the optical output is turned off and the pause state is set. Then, when the access is completed, the optical output is turned on in the paused state. afterwards,
The timer _TBL is counted, and when the time is over, the playback pause is released and playback is started. By doing so, it is possible to eliminate the variation in the time required for access and to set the length between songs on the recording side to a predetermined time based on the timer T _BL .

Of course, when the reproducing device is a DAT player or the like and it takes a long time not only when exchanging the DAT cassette but also when accessing, by adopting the present invention, the recording side records during the access. It is more effective because it can be stopped.

[0056]

As described above, when the reproducing apparatus of the present invention is connected to a recording apparatus to perform digital dubbing by optical transmission, when the data reading means finishes reading a certain program as audio data. Since the output operation of the light output means is turned off until the next program can be read, even if it takes a long time before the next program can be read, Since the recording device side can be controlled in the stopped state, it is possible to eliminate the problem that the silent state is recorded for a long time and the appearance between the songs is long and the appearance is bad.

Furthermore, there is no need to separately connect a control cable for controlling such a recording device side, and it is not difficult for the user to use. In addition, since the function that is generally adopted in the digital recording device, that is, the recording is temporarily stopped when the optical input is lost, is used, the above effect is obtained even if the devices are not provided with a specific communication mode. Can be obtained.

Further, the control means causes the data reading means to read the next program and turns on the output operation of the light output means, and starts the voice data reading operation of the data reading means after a predetermined time. As a result, the time between songs on the recording side can also be controlled, and a better-looking recording can be realized.

[Brief description of drawings]

FIG. 1 is a block diagram of a CD changer player which is a reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram of an MD recorder connected to the CD changer player of the embodiment.

FIG. 3 is a flowchart of a process when a disc is changed in the CD changer player of the embodiment.

FIG. 4 is an explanatory diagram of an operation at the time of disc exchange and a dubbing recording state in the CD changer player of the embodiment.

FIG. 5 is an explanatory diagram of a dubbing operation of a conventional CD changer player when a disc is replaced.

[Explanation of symbols]

 1 Changer Section 2 Spindle Motor 3 Optical Head 5 RF Amplifier 6 Servo Circuit 7 Decoder 11 System Controller 12 Optical Modulation Section 90 CD 91 MD

Claims (2)

[Claims] 1. A data reading unit capable of reading audio data from a recording medium, an optical output unit capable of outputting the audio data read by the data reading unit as an optical modulation signal, and the data reading unit. In a period from the end of the reading of a certain program as audio data to the time when the reading of the next program becomes possible, the control means capable of turning off the output operation of the light output means. A reproducing apparatus characterized by being configured as. 2. The control means starts the audio data reading operation of the data reading means after a predetermined time has elapsed since the next program can be read by the data reading means and the output operation of the light output means is turned on. The reproducing apparatus according to claim 1, wherein the reproducing apparatus is controlled so that the reproducing apparatus is controlled.