JPH05205270A - Disc recorder and disc reproducer - Google Patents

Abstract

PURPOSE:To achieve long time battery driving by saving power consumption. CONSTITUTION:In a disc recorder/reproducer performing intermittent recording/ reproduction, a system controller 5 turns OFF power supply for decoder 21 - digital output circuit 26 in reproduction system 6 under recording mode and turns off power supply for an encoder 14 - a servo control circuit 20 in recording system 2 during record stop interval. The system controller 5 further interrupts power supply for an LPF 10 - a magnetic head 16 in the recording system 2 under reproduction mode and turns off power supply for a spindle motor 17 - a decoder 21 in the reproduction system 6 during reproduction stop interval.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk recording apparatus for recording audio data on an optical disk and a disk reproducing apparatus for reproducing audio data recorded on the optical disk.

[0002]

2. Description of the Related Art In recent years, rewritable optical disks have been widely used as recording media because they are capable of high-speed access and semi-permanent storage of data, and these rewritable optical disks are intermittently used. A disc recording device for recording audio data and a disc reproducing device for intermittently reproducing audio data recorded on the optical disc are known.

As the above rewritable optical disc,
For example, a magneto-optical disk including a magneto-optical film is used. In the magneto-optical disc, the entire recording area is divided into a data recording area and a lead-in area, the audio data is recorded in the data recording area, and the recording start address of the audio data recorded in the data recording area, So-called TOC (Table of Content) such as recording end address and absolute time
s) Data is recorded in the lead-in area.

The disk recording apparatus for intermittently recording the audio data temporarily stores the audio data to be recorded in a memory, reads out the audio data once stored in the memory for every predetermined amount, and intermittently records the audio data. .. As a method of recording the audio data, a magnetic field corresponding to the audio data is applied from, for example, the upper side of the optical disk (magneto-optical disk) and a laser beam is emitted from the lower side of the optical disk. As a result, the portion irradiated with the laser beam rises to the so-called Curie temperature, is magnetized in accordance with the applied magnetic field, and desired voice data is recorded.

Further, the disc reproducing apparatus for intermittently reproducing the audio data reads the TOC data from the lead-in area in advance before reproducing the audio data recorded on the optical disk. When the position of each audio data recorded on the optical disc is recognized and reproduction of the audio data is designated, the TOC read in advance is read.
Based on the data, the position on the optical disc where the designated audio data is recorded is accessed, and the audio data is intermittently reproduced for each predetermined amount. In reproducing the voice data, a laser beam weaker than that when the voice data is recorded is applied to the portion where the voice data is recorded. As a result, reflected light is generated from the portion irradiated with the laser beam. The reflected light is photoelectrically converted and temporarily stored in the memory as voice data. The audio data once stored in this memory is continuously read and output.

[0006]

However, since the disk recording apparatus intermittently reads the audio data for each predetermined amount from the memory and records the audio data on the optical disk as described above, the predetermined amount of audio data read from the memory is not recorded. From the time the audio data is recorded on the optical disk until the recording of a predetermined amount of audio data is started next, the track jump is repeated to hold the last position on the track where the audio data was previously recorded. .. Until the recording of the next audio data is started, the power consumed for holding the last position on the track where the audio data is recorded before repeating the track jump is very wasteful.

Further, the disc reproducing apparatus intermittently reads the audio data of each predetermined amount from the optical disc as described above, stores the audio data in the memory, and continuously reads the audio data stored in the memory and outputs the audio data. Unless the audio data is being reproduced from the optical disk, the track jump is repeated to hold the last position on the track where the audio data was reproduced before. Until the next audio data is reproduced, the electric power for holding the last position on the track where the audio data is reproduced before repeating the track jump is very wasteful.

The problem of the power consumption of the disk recording device and the disk reproducing device is the driving time such as how many hours can be continuously driven by the battery when the disk recording device and the disk reproducing device are driven by a battery. This is a very important issue as it is directly related to.

The present invention has been made in view of the above problems, and in a disk recording apparatus for intermittently recording audio data, unnecessary operation at the time of recording audio data is omitted, and power consumption is reduced. An object of the present invention is to provide a disk recording device that can save money.

Further, according to the present invention, in a disk reproducing apparatus for intermittently reproducing audio data, unnecessary disk operation during the reproduction of the audio data can be omitted and power consumption can be saved. The purpose is to provide a device.

[0011]

DISCLOSURE OF THE INVENTION A disk recording apparatus according to the present invention is a disk recording apparatus in which recording data is temporarily stored in a storage means, and the recording data once stored in the storage means is read at a predetermined amount and recorded on an optical disk. An apparatus, which detects the remaining amount of recording data temporarily stored in the storage means when recording the recording data on the optical disc, and the remaining amount of recording data in the storage means becomes equal to or less than a predetermined amount. The above-mentioned problem is solved by further comprising a recording means for reading the recording data from the storage means and recording it on the optical disc, and a control means for controlling the power supply to the rotation drive control means of the optical disc to be turned off.

The disk reproducing apparatus according to the present invention is
A disc reproducing apparatus for reproducing recorded data recorded on an optical disc for each predetermined amount, temporarily storing it in the storage means, and continuously reading and outputting the recorded data once stored in the storage means, When the remaining amount of the recording data temporarily stored in the storage means is detected when the recording data recorded on the optical disc is reproduced, and the remaining amount of the recording data in the storage means exceeds a predetermined amount. The above-mentioned problem is solved by further comprising a reproducing means for reproducing the recorded data from the optical disk and supplying the same to the storage means, and a control means for turning off the power supplied to the rotation drive control means of the optical disk.

[0013]

In the disk recording apparatus according to the present invention, when the control means records the recording data on the optical disk, the control means detects the remaining amount of the recording data temporarily stored in the storage means, When the remaining amount is equal to or less than a predetermined amount, the recording means for reading the recording data from the storage means and recording the data on the optical disc and the power supply to the rotation drive control means for the optical disc are controlled to be turned off.
The power consumption of the disk recording device is saved.

Further, the disk reproducing apparatus according to the present invention,
The control unit detects the remaining amount of the recording data temporarily stored in the storage unit when reproducing the recording data recorded on the optical disc, and the remaining amount of the recording data in the storage unit is equal to or more than a predetermined amount. In this case, the power consumption of the disc reproducing apparatus can be saved by controlling the reproducing means for reproducing the recorded data from the optical disc and supplying it to the storing means and the power supply for the rotation drive controlling means of the optical disc. Try to.

[0015]

Embodiments of the disc recording apparatus and the disc reproducing apparatus according to the present invention will be described below with reference to the drawings. The disc recording device and the disc reproducing device according to the present invention can be integrated as a disc recording and reproducing device which is one device as shown in FIG. 1, for example.

In FIG. 1, the disc recording / reproducing apparatus includes an optical disc 1, so-called TOC (Table of Contents) data indicating audio data which is recording data on the optical disc 1 and a recording position and recording contents of the audio data. A recording system 2 for recording, a display unit 3 for displaying the absolute time of audio data recorded on the optical disc 1, and the like.
A keyboard 4 provided with keys for designating recording and reproduction of the audio data, a system controller 5 as a control means, a reproduction system 6 for reproducing the audio data recorded on the optical disc, and the audio data. The above TO indicating the recorded contents of the recorded audio data when recording
The TOC memory 27 temporarily stores the C data and also temporarily stores the TOC data reproduced in advance when the audio data is reproduced.

The optical disk 1 has, for example, as shown in FIG. 2, a reproduction-only area A ₁₀ and a recording / reproduction area A ₂₀ provided outside the reproduction-only area A ₁₀ . The reproduction-only area A ₁₀ is an area in which desired data is recorded by the manufacturer, and includes a data recording area A ₁₁ in which data such as performance information is recorded, and a lead-in area A ₁₂ provided on the inner peripheral side thereof. have. In the reproduction-only area A ₁₀ , digital data is recorded as the presence or absence of pits corresponding to “1” and “0”. In addition, the lead-in area A
_{In the 12} , recording start address information and recording end address information are recorded in order for all performance information as TOC data indicating the recording position and recording content of the data recording area A ₁₁ .

The recording / reproducing area A ₂₀ of the optical disk 1 is
A magneto-optical recording area for the user to arbitrarily rewrite data, a data recording area A ₂₁ in which data such as performance information is recorded, and a lead-in area A ₂₂ provided on the inner peripheral side thereof. have.

The disk recording / reproducing apparatus according to the present embodiment is
As shown in FIG. 3, the recording of each data in the reproduction-only area A ₁₀ and the recording / reproduction area A ₂₀ is performed in one cluster consisting of 32 sectors of main data, 3 sectors of linking, and 1 sector of sub-data, totaling 36 sectors. It is supposed to be done every time.

In the lead-in area A ₂₂ , the TOC data indicating the recording position and the recording contents of the recording data recorded in the data recording area A ₂₁ is recorded, and one sector of sector number 00 is recorded. For example, as shown in FIG. 4, it is composed of a synchronization signal of 12 bytes, header information of 8 bytes, and a data area of 2332 bytes, totaling 2357 bytes. In the data area, 8 bytes are used for each recording data, and the recording data number (song number), upper byte of start cluster, lower byte of start cluster, start sector, sector number 00, etc. are recorded. It

The recording system 2 includes a low-pass filter (LPF) 10 to which an audio signal, which is an analog signal to be recorded on the optical disk 1, is supplied via an input terminal 7, and the L-type filter.
The A / D converter 11 that digitizes the audio signal from the PF 10 to form audio data, and the audio data from the A / D converter 11 will be described later with reference to ATRAC (AdaptiveTr).
ansform acoustic coding (AT) that performs encoding processing
A RAC encoder 12, a RAM 13 for temporarily storing the ATRAC-encoded audio data, and the RA
An encoder 14 that performs EFM encoding processing or the like on the audio data read from M13, a magnetic head drive circuit 15 that forms a modulation magnetic field according to the audio data from the encoder 14, and the magnetic head drive circuit 15 A magnetic head 16 for applying a modulation magnetic field to the optical disc 1 in accordance with the modulation magnetic field, a spindle motor 17 for rotationally driving the optical disc 1 at a constant linear velocity, and a laser beam for a location to which a magnetic field is applied by the magnetic head 16. An optical head 18 for irradiating the optical head, an RF circuit 19 for extracting a focus error signal and a tracking error signal from the output of the optical head 18, a focus servo and a tracking servo of the optical head 18, and a rotation of the spindle motor 17. Consists of a servo control circuit 20 that controls the servo, etc. There.

The reproducing system 6 includes a spindle motor 17 for rotating the optical disc 1 at a constant linear velocity, for example.
An optical head 18 for irradiating a portion where the voice data is recorded with a laser beam weaker than that for recording the voice data, and photoelectrically converting the reflected light to form voice data,
An RF circuit 19 for extracting a focus error signal and a tracking error signal from the output of the optical head 18
And a servo control circuit 20 for controlling focus servo and tracking servo of the optical head 18, rotation servo of the spindle motor 17, etc., and EFM decoding to an output from the optical head 18 via the RF circuit 19. A decoder 21 that performs processing and the like, and a RAM 22 that temporarily stores the audio data decoded by the decoder 21.
And the audio data read from the RAM 22 is AT
An ATRAC decoder 23 for performing a RAC decoding process,
A D / A converter 24 that analogizes the audio data from the ATRAC decoder 23 to form an audio signal, an LPF 25 that removes high frequency components from the audio signal from the D / A converter 24 and outputs the audio signal, and the ATRAC decoder 23
And a digital output circuit 26 that directly outputs the audio data from the.

The RAM 1 provided in the recording system 2
3 and the RAM 22 provided in the reproduction system 6 constitutes a storage means. Further, the spindle motor 17, the optical head 18, the RF circuit 19, and the servo control circuit 20.
Is shared by the recording system 2 and the reproducing system 6. In addition, the encoder 14 to the magnetic head 16 and the optical head 18 in the recording system 2 constitute recording means for reading the audio data from the RAM 13 and recording the audio data on the optical disk 1, and the spindle motor 17,
The RF circuit 19 and the servo control circuit 20 constitute a rotation drive control means for the optical disc 1.

The optical head 18 and the decoder 21 in the reproducing system 6 constitute reproducing means for reproducing the audio data from the optical disk 1 and supplying it to the RAM 22 which is the storing means, and the spindle. Motor 1
7, the RF circuit 19 and the servo control circuit 20 constitute a rotation drive control means for the optical disc 1.

The system controller 5, which is the control means provided in the disc recording / reproducing apparatus according to this embodiment, will be described in detail later. In the recording mode for recording audio data on the optical disc 1, the system controller 5 is operated as described above. The power supplied to the decoder 21 to the digital output circuit 26 of the reproduction system 6 is controlled to be off, and the remaining amount of the recording data temporarily stored in the RAM 13 is detected, and the remaining amount of the audio data becomes equal to or less than a predetermined amount. In this case, power is supplied to the encoder 14 to the magnetic head 16 and the optical head 18 which are the recording means, and power to the spindle motor 17, the RF circuit 19 and the servo control circuit 20 which are the rotation drive control means. Control each off.

The system controller 5 also controls the LPF 10 to the magnetic head 1 of the recording system 2 in the reproduction mode for reproducing the audio data recorded on the optical disc 1.
6, the power supply to the RAM 6 is turned off, and the RAM 2
2 detects the remaining amount of the audio data once stored, and when the remaining amount of the audio data exceeds a predetermined amount, the power supply to the optical head 18 and the decoder 21 as the reproducing means, and the above The power supply to the spindle motor 17, the RF circuit 19, and the servo control circuit 20, which are rotation drive control means, is controlled to be off.

Next, the operation of the disc recording / reproducing apparatus according to the present embodiment in the recording mode for recording desired audio data in the recording / reproducing area A ₂₀ of the optical disc 1 will be described. This recording mode is designated by the keyboard 4 shown in FIG.
This is done by turning on the recording key provided in the. When the recording key is turned on, the spindle motor 17 rotationally drives the optical disc 1 so that the angular velocity is constant or the linear velocity is constant.
A desired audio signal which is an analog signal is supplied to the A / D converter 11 via the input terminal 7 and the LPF 10.
The spindle motor 17 is controlled by the servo control circuit 20 so as to always rotate constantly.

The A / D converter 11 quantizes the audio signal and 2CH × 16 bit × 44.1 kHz≈1.
Voice data having a data rate of 4 Mbit / sec is formed and supplied to the ATRAC encoder 12.

The ATRAC encoder 12 quantizes the audio signal by the A / D converter 11 to obtain 1.4.
For voice data with a data rate of Mbit / sec, a maximum of about 20 msec data is set as one block,
The waveform on the time axis is analyzed by so-called orthogonal transformation into about 1,000 components on the frequency axis, and the frequency components that are important for hearing are extracted in order to form audio data at a data rate of 300 kbit / sec. That is, the above 1.4 Mbi
1/5 of audio data with a data rate of t / sec is 30
A process of compressing audio data (hereinafter referred to as compressed data) having a data rate of 0 kbit / sec is performed, and the data transfer rate is converted from 75 sectors / sec in the standard CD-DA format to 15 sectors / sec. This compressed data is supplied to the RAM 13.

The RAM 13 is controlled by the system controller 5 to write and read data, and is used as a buffer memory for temporarily storing the compressed data supplied from the ATRAC encoder 12. That is, the above ATRAC
The compressed data supplied from the encoder 12 has its data transfer rate reduced to ⅕ of the standard data transfer rate of 75 sectors / second, that is, 15 sectors / second, and this compressed data is stored in the RAM 13. It is written continuously. It is sufficient for this compressed data to record one sector for every five sectors, but such recording for every five sectors is practically impossible. Therefore, continuous sector recording as described later is performed. This recording is performed in bursts at a data transfer rate of 75 sectors / second with one cluster as a recording unit through a recording stop period described later. That is, in the RAM 13, compressed data continuously written at a low transfer rate of 15 (= 75/5) sectors / second corresponding to the bit compression rate is read out in bursts at the transfer rate of 75 sectors / second. Be done. The overall data transfer rate of the read and recorded data, including the recording stop period, is as low as the above-mentioned 15 sectors / second, but within the time of the burst-like recording operation. The instantaneous data transfer rate is 75 sectors / sec.

The compressed data read out in burst from the RAM 13 at the transfer rate of 75 sectors / second is supplied to the encoder 14.

The encoder 14 performs coding processing (parity addition and interleaving processing) for error correction, EFM coding processing, etc. on the compressed data supplied in burst from the RAM 13 as described above.
The audio data encoded by the encoder 14 is supplied to the magnetic head drive circuit 15. The magnetic head drive circuit 15 drives the magnetic head 16 so as to apply a magnetic field modulation according to the compressed data to the optical disc 1.

On the other hand, the system controller 5 performs the memory control as described above on the RAM 13, and the compressed data read in burst from the RAM 13 by this memory control is continuously recorded on the recording track of the optical disc 1. The recording position is controlled so that the recording is performed manually. The control of the recording position manages the recording position of the compressed data which is burst-read from the RAM 13 by the system controller 5, and controls the servo control of the control signal for designating the recording position on the recording track of the optical disc 1. This is done by supplying to the circuit 20.

That is, in this disc recording / reproducing apparatus, the audio data output from the A / D converter 11 has a sampling frequency of 44.1 kHz, a quantization bit number of 16 bits, and a data transfer rate of 74 sectors / second. Of the audio PCM data. This is the above ATRA
The data transfer rate is 1 when it is supplied to the C encoder 12.
It is output as compressed data of 15 sectors / second of / 5. The compressed data continuously output from the ATRAC encoder 12 at a transfer rate of 15 sectors / second is the RA
It is supplied to M13.

Then, the system controller 5 is
As shown in FIG. 5, by continuously incrementing the write pointer W of the RAM 13 at a transfer rate of 15 sectors / second, the compressed data can be stored in the RAM 13 by 15 times.
The RAM 1 is continuously written at a transfer rate of sector / second.
When the data amount of the compressed data stored in the RAM 3 becomes a predetermined amount K or more, the read pointer R of the RAM 13 is burst-wise incremented at a transfer rate of 75 sectors / second, and the compressed data is read from the RAM 13. Predetermined amount K
Only, memory control is performed so as to read in bursts at the transfer rate of 75 sectors / sec.

By the memory control by the system controller 5 as described above, the ATRAC encoder 1
RAM 1 at a transfer rate of 2 to 15 sectors / second, for example
When the data amount of the compressed data stored in the RAM 13 exceeds a predetermined amount K, the R
Since the compressed data is read from the AM 13 as recording data by a predetermined amount K in a burst manner at a transfer rate of 75 sectors / second, the input data can be stored in the RAM 13 while always ensuring a data writing region of a predetermined amount or more. The data can be continuously written in the RAM 13.

The system controller 5 uses the RA
The recording position on the recording track of the optical disc 1 is controlled so that the recording data read out in burst from M13 is recorded in a continuous state on the recording track of the optical disc 1. In this case, as described above, the RAM 13
Since a data writing area of a predetermined amount or more is always secured in the above, even if the system controller 5 detects that a track jump or the like has occurred due to disturbance or the like and interrupts the recording operation on the optical disc 1, The input data can be continuously written in the data writing area of a certain amount or more, and the restoration processing operation can be performed during that time, and the input data can be continuously recorded on the recording track of the optical disc 1.

The optical head 18 is, for example, as shown in FIG. 6, a laser light source 31 such as a laser diode, a collimator lens 32, a beam splitter 33, and an objective lens 3.
4, optical components such as the polarization beam splitter 35, first and second photodetectors 36 and 37 for detecting the light separated by the polarization beam splitter 35, and addition and synthesis of respective detection outputs of these photodetectors 36 and 37. It is composed of a single signal synthesizer 38, a first signal synthesizer 39 for subtracting and synthesizing the respective detection outputs, and the like, and is provided at a position facing the magnetic head 16 with the optical disk 1 in between.

The optical head 18 is used for the optical disc 1 described above.
When data is recorded in the recording / reproducing area A ₂₀ , the magnetic head drive circuit 15 drives the magnetic head 16 to irradiate a target track of the optical disc 1 to which a modulation magnetic field according to the recording data is applied. Data recording is performed by thermomagnetic recording. It should be noted that the optical head 18 detects a focus error by a so-called astigmatism method, for example, by detecting the reflected light of the laser light applied to the target track in the recording mode and the reproducing mode described later. The tracking error is detected by the so-called push-pull method.

The changeover switch 40 provided on the optical head 18 is controlled by the system controller 5 so that the selection terminal 40a selects the selected terminal 40c in the recording mode. It As a result, in this recording mode,
The combined signal from the first signal combiner 38 obtained by adding and combining the detection outputs from the photodetectors 36 and 37 is shown in FIG.
Is supplied to the RF circuit 19 shown in FIG.

The RF circuit 19 corresponds to the optical head 18
The focus error signal and the tracking error signal are extracted from the output of the above and supplied to the servo control circuit 20, and the reproduced signal is binarized and supplied to the decoder 21 described later.

The servo control circuit 20 is composed of, for example, a focus servo control circuit, a tracking servo control circuit, a spindle motor servo control circuit, a sled servo control circuit, and the like. The focus servo control circuit controls the focus of the optical system of the optical head 18 so that the focus error signal becomes zero. The tracking servo control circuit controls the tracking of the optical system of the optical head 18 so that the tracking error signal becomes zero. Further, the spindle motor servo control circuit controls the spindle motor 17 so that the optical disc 1 is rotationally driven at the constant angular velocity or the constant linear velocity. Further, the sled servo control circuit moves the optical head 18 and the magnetic head 16 to the target track position of the optical disc 1 designated by the system controller 5.

The servo control circuit 20 performing such various control operations supplies the system controller 5 with information indicating the operating state of each part controlled by the servo control circuit 20.

The system controller 5 controls the respective control circuits according to the information indicating the operating states of the respective parts, whereby the optical head 18 and the magnetic head 16 are controlled.
Manages the recording position on the recording track that is being traced, and also manages the reproducing position on the recording track in the reproduction mode described later.

The system controller 5 automatically stores in the TOC memory 27 a TOC data table consisting of TOC data indicating the recording position of the data recording area A ₂₁ of the recording / reproducing area A ₂₀ during the recording of such audio data. Control is performed to read out the audio data and record it in the lead-in area A ₂₂ when the audio data is completely recorded.

Here, as described above, the disc recording / reproducing apparatus reads the audio data once stored in the RAM 13 in the recording mode for every predetermined amount K, and intermittently records it on the optical disc 1. Therefore, the predetermined amount K
There is an interval between the reading and recording of the audio data of No. 1, and the reading and recording of the audio data of the predetermined amount K (recording stop period). Therefore, in the recording mode, the system controller 5 turns off the power supply to the decoder 21 to the digital output circuit 26 of the reproducing system 6 which is unnecessary for recording the audio data, and also controls the recording system 2. The remaining amount of the audio data that is once stored and read in the RAM 13 is detected, and when the remaining amount of the audio data becomes less than a predetermined amount, it is supplied to the encoder 14 to the magnetic head 16 and the optical head 18 as the recording stop period. And the spindle motor 17, the RF circuit 19 and the servo control circuit 20 are turned off.

Specifically, assuming that the recording mode is set at time t1 in FIG. 7A, the system controller 5 causes the decoder 21 to digital output circuit of the reproducing system 6 which is unnecessary for recording audio data. The power supply to the recording system 2 is controlled to be off, the power supply to the LPF 10 to the RAM 13 of the recording system 2 is controlled to be on, and the encoder 14 to the servo circuit 2 of the recording system 2 is started from time t1 in FIG. 7A.
The power supply to 0 is controlled to start.

When the supply of power to the encoder 14 to the servo circuit 20 is started, the servo control circuit 20 operates from time t2 in FIG. 7B, the spindle motor 17 is rotationally driven at a constant linear velocity, and the like. The encoder 14 performs the above-described encoding processing on the audio data read from the RAM 13 from the time t2 in FIG. 7C and outputs the audio data, and the magnetic head 16 and the optical head from the time t3 in FIG. 18 is accessed to the designated address. Then, the recording of the audio data is started from time t3 in FIG. The recording of such audio data is performed by the RA described above.
Since the audio data is read from M13 for each predetermined amount k, the remaining amount of the audio data decreases from time t3 when the recording of the audio data is started, as shown in FIG. 7 (f).
The system controller 5 detects the remaining amount of the voice data in the RAM 13, and when the remaining amount of the voice data becomes equal to or less than a predetermined amount G as shown at time t4 in FIG. The reading of the audio data from the recording system 2 is stopped, and the power supply to the encoder 14 to the servo control circuit 20 of the recording system 2 is stopped as shown in FIG. As a result, as shown in FIGS. 7B to 7E, the rotation of the spindle motor 17 is stopped, the encoding process of the encoder 14 is stopped, and the magnetic head 16 and the optical head 18 stop the last of the audio data. It stops near the address where the recording was made, and the recording of audio data stops.

The system controller 5 stores the final recording address of the audio data when the power supply to the encoder 14 to the servo control circuit 20 is stopped.

At time t4 shown in FIG. 7A, the RAM is
When the reading of the audio data from 13 is stopped and the power supply to the encoder 14 to the servo control circuit 20 is stopped, the remaining amount of the audio data in the RAM 13 increases from time t4 in FIG. .. When the remaining amount of the audio data becomes a predetermined amount H or more as shown at time t5 in FIG. 7 (f), the system controller 5 again sets the encoder 14 again as shown in FIG. 7 (a). ~ Starting the power supply to the servo control circuit 20, the RAM1
Control is performed so that reading of audio data is started from 3.

As a result, the servo control circuit 20 operates from the time t6 in FIG. 7B, the spindle motor 17 is rotationally driven again, and the RAM 1 starts from the time t6 in FIG. 7C.
The encoder 14 performs the above-described encoding processing on the audio data read from the audio data 3 and outputs the audio data, and the magnetic head 16 and the optical head 18 output the audio data before the audio data from time t7 in FIG. The final address of the recording where the recording is performed is accessed. Then, the recording of the audio data is started from time t7 in FIG.

Then, the system controller 5 is
As described above, the remaining amount of voice data in the RAM 13 is detected, and when the remaining amount of data in the RAM 13 becomes equal to or less than the predetermined amount G as shown at time t8 in FIG. 7F, as shown in FIG. Then, the power supply to the encoder 14 to the servo control circuit 20 is stopped. The system controller 5 repeats the power-on / off control as described above during the recording mode.

As described above, the encoders 14-
The system controller 5 stores the final recording address of the audio data when the power supply to the servo control circuit 20 is stopped, and the magnetic head 16 and the optical head 18 stop near the final recording address. Therefore, the magnetic head 16 and the optical head 18 can easily and quickly access the recording end address.

In this recording mode, the R
The power supply to the encoder 14 to the servo control circuit 20 is not stopped when the data remaining amount of the AM 13 becomes 0, but before the data remaining amount becomes 0 (the data remaining amount becomes the predetermined amount G). When the voice data cannot be recorded due to, for example, vibration, the voice data once stored in the RAM is read again and recorded. Start over,
Re-recording can be done. If such a re-recording system is not adopted, the power supply to the encoder 14 to the servo control circuit 20 may be stopped when the remaining amount of data in the RAM 13 becomes zero.

As described above, in the recording mode, the system controller 5 detects the remaining amount of voice data in the RAM 13, and the remaining amount of voice data is the predetermined amount G.
When the following time is set as the recording stop period, the power supply to the encoder 14 to the magnetic head 16 and the optical head 18 and the power supply to the spindle motor 17, the RF circuit 19 and the servo control circuit 20 are turned off. By controlling, when the audio data is not recorded on the optical disc 1, the track jump is repeated during the recording stop period, and there is no need to hold the last position on the track where the audio data was previously recorded. Such operations can be omitted, and power consumption can be saved.

Therefore, when the disc recording / reproducing apparatus is driven by a battery, the battery life can be extended and the driving time can be extended.

Next, the reproduction-only area A of the optical disc 1
The operation of the disc recording / reproducing apparatus in the reproducing mode for reproducing the audio data continuously recorded on the recording tracks of ₁₀ and the recording / reproducing area A ₂₀ will be described. When the optical disc 1 is set in the disc recording / reproducing apparatus, the system controller 5 previously rotationally drives the optical disc 1 at a constant linear velocity to reproduce the data area A ₁₁ of the reproduction-only area A ₁₀ of the optical disk 1. To manage the position, the TOC data is reproduced from the lead-in area A ₁₂ of the reproduction-only area A ₁₀ and stored in the TOC memory 27, and the reproduction position of the recording / reproducing area A ₂₀ with respect to the data area A ₂₁ is managed. For this purpose, the lead-in area A of the recording / reproducing area A _20
The TOC data including the date and time data as described above is reproduced from ₂₂ and stored in the TOC memory 27, and the keyboard 4
The player enters a waiting state for designating the playback mode by turning on the playback key provided in the.

Further, the system controller 5 reproduces the TOC data from the lead-in area A ₁₂ of the reproduction-only area A ₁₀ and the lead-in area A ₂₂ of the recording / reproducing area A ₂₀ , and according to the respective TOC data. The recording contents are controlled to be displayed on the display unit 3.

Next, when the reproduction key is turned on to specify the reproduction mode, the system controller 5
The spindle motor 17 is rotationally driven at a constant linear velocity to rotationally drive the optical disc 1, and the TOC data corresponding to the designated audio data stored in the TOC memory 27 is read, and the TOC data is read according to the read TOC data. The optical head 18 is controlled to move to the position where the designated audio data is recorded.

The optical head 18 is the optical disc 1 described above.
When the data is reproduced from the reproduction-only area A _{10, the} reproduction signal can be obtained by detecting the change in the amount of the reflected light of the laser light from the target track, and the respective detection outputs by the photodetectors 36 and 37 can be obtained as described above. The reproduction signal added and synthesized by the signal synthesizer 38 of No. 1 is supplied to the RF circuit 19 through the changeover switch 40. Also,
When data is reproduced from the recording / reproducing area A ₂₀ of the optical disc 1, a reproduction signal can be obtained by detecting a difference in polarization angle (Kerr rotation angle) of the reflected light of the laser light from the target track. 36,3
A reproduction signal obtained by subtracting and synthesizing each detection output of 7 by the second signal synthesizer 39 is output through the changeover switch 40.

The reproduction signal output through the changeover switch 40 is binarized by the RF circuit 19 and supplied to the decoder 21.

The decoder 21 includes the encoder 14
The reproduction output binarized by the RF circuit 19 is subjected to processing such as the above-described decoding processing for error correction and EFM decoding processing, and the above-mentioned compressed data is converted into 75 sectors. The data is reproduced at a transfer rate of / sec and is supplied to the RAM 22 as reproduction data. RA above
In M22, the writing and reading of data are controlled by the system controller 5, and the reproduced data supplied from the decoder 21 at the transfer rate of 75 sectors / second is written in bursts at the transfer rate of 75 sectors / second. The reproduction data written in bursts at the transfer rate of 75 sectors / second is continuously read out from the RAM 22 at the transfer rate of 15 sectors / second.

The system controller 5 performs memory control such that the reproduction data is written in the RAM 22 at a transfer rate of 75 sectors / second and the written reproduction data is continuously read out at a transfer rate of 15 sectors / second. At the same time, by this memory control, the reproduction position is controlled so that the reproduction data written in burst from the RAM 22 is continuously reproduced from the recording track of the optical disc 1. The control of the reproduction position manages the reproduction position of the reproduction data which is burst-read from the RAM 22 by the system controller 5, and controls the servo control of the control signal for designating the reproduction position on the recording track of the optical disc 1. This is done by supplying to the circuit 20.

That is, the above system controller 5
As shown in FIG. 8, the write pointer W of the RAM 22 is incremented at a transfer rate of 75 sectors / second, the reproduction data is written to the RAM 22 at a transfer rate of 75 sectors / second, and the RAM 22 is read. When the pointer R is continuously incremented at a transfer rate of 15 sectors / second, the reproduction data is continuously read from the RAM 22 at a transfer rate of 15 sectors / second, and the write pointer W catches up with the read pointer R. The writing is stopped, and the write pointer W of the RAM 22 is burst-incremented at a transfer rate of 75 sectors / second so that the writing is performed when the data amount of the reproduction data stored in the RAM 22 becomes a predetermined amount L or less. Memory control is performed.

By the memory control by the system controller 5 as described above, the compressed data reproduced from the recording track of the optical disc 1 is burst-written to the RAM 22 at a transfer rate of 75 sectors / second, and the RA is recorded.
Since the compressed data is continuously read from M13 as reproduction data at a transfer rate of 75 sectors / second,
It is possible to continuously read the reproduction data from the RAM 22 while always ensuring a data reading area of a predetermined amount L or more in the RAM 22 for the RAM 13. Further, the reproduction data read out in burst from the RAM 22 can be reproduced continuously from the recording track of the optical disc 1 by controlling the reproduction position on the recording track of the optical disc 1 by the system controller 5. I can. In addition, as described above, since the RAM 22 is always secured with the data reading area of a predetermined amount L or more, the system controller 5 detects that a track jump or the like has occurred due to disturbance or the like, and reproduces the optical disk 1. Even when the operation is interrupted, it is possible to read the reproduction data from the data reading area of the predetermined amount K or more and continue the output of the analog signal, and to perform the restoration processing operation during that time.

The compressed data obtained as reproduced data continuously read from the RAM 22 at a transfer rate of 15 sectors / second is supplied to the ATRAC decoder 23.
The ATRAC decoder 23 corresponds to the ATRAC encoder 12, and in the operation mode designated by the system controller 5, for example, decompresses the compressed data by 5 times to obtain digital data having a transfer rate of 75 sectors / second. Form voice data, which is D /
It is supplied to the A converter 24 and the digital output circuit 26, respectively.

The D / A converter 24 uses the ATRAC
The audio data supplied from the decoder 23 is converted into an analog signal to form an audio signal, which is output via the low pass filter 25. The audio signal passed through the low pass filter 25 is taken out from the output terminal 9. Further, the digital output circuit 26 outputs the audio data supplied from the ATRAC decoder 23 as it is as audio data. The audio data output from the digital output circuit 26 is taken out from the output terminal 8.

Here, as described above, the disc recording / reproducing apparatus reads out the audio data from the optical disc 1 for each predetermined amount K in the reproducing mode, temporarily stores the audio data in the RAM 22, and the audio data once stored in the RAM 22. Data is continuously read and output. Therefore, a predetermined amount K of audio data is read from the optical disc 1 and the RAM 2 is read.
2 is once stored, and then an interval is opened until the audio data of a predetermined amount K is read from the optical disk 1 (reproduction stop period). Therefore, the system controller 5
In the reproduction mode, the power supply to the LPF 10 to the magnetic head 16 of the recording system 2, which is unnecessary for reproducing the audio data, is controlled to be off, and the R of the reproduction system 2 is controlled.
The remaining amount of the audio data once stored and read in the AM 22 is detected, and when the remaining amount of the audio data becomes equal to or more than a predetermined amount, the power supply to the optical head 18 and the decoder 21 as the reproduction stop period, and The power supply to the spindle motor 17, the RF circuit 19 and the servo control circuit 20 is controlled to be off.

Specifically, the above system controller 5
Assuming that the reproduction mode is started from time t11 in FIG. 9A, the recording system 2 which is unnecessary for reproducing the audio data.
The power supply to the LPF 10 to the magnetic head 16 is controlled to be turned off, the power supply to the spindle motor 17 to the decoder 21 is started, and the power supply to the RAM 22 to the digital output circuit 26 is controlled.

The spindle motor 17 to the decoder 21
When the power supply to the RAM 22 and the digital output circuit 26 from the RAM 22 is started, the servo control circuit 20 operates from time t12 in FIG. 9B, and the spindle motor 17 is rotationally driven at a constant linear velocity, for example. At the same time, the decoder 21 is driven from time t12 in FIG.
At time t13 in FIG. 9C, the optical head 18 is accessed to the designated address, and at time t1 in FIG. 9D.
From 3, the reproduction of the audio data on the optical disc 1 is started.

Since reproduction of such audio data is performed by reading the audio data from the optical disc 1 at a predetermined amount k, reproduction of the audio data from the optical disc 1 is started as shown in FIG. 9 (f). R from the time t13
The remaining amount of voice data temporarily stored in the AM 22 increases. The system controller 5 detects the remaining amount of voice data in the RAM 22, and when the remaining amount of voice data reaches a predetermined amount M or more as shown at time t14 in FIG. As shown in (a), the power supply to the spindle motor 17 to the decoder 21 is stopped. As a result, as shown in FIG. 9B, the spindle motor 1
7 is stopped, the optical head 18 is stopped at an address in the vicinity of the stop of the power supply as shown in FIG. 7C, and the sound from the optical disc 1 is output as shown in FIG. The reproduction of the data is stopped, and the decoding process of the decoder 21 is stopped as shown in FIG.

Even when the power supply to the spindle motor 17 to the decoder 21 is stopped in this way, the system controller 5 constantly supplies the power to the RAM 22 to the digital output circuit 26 during the reproduction mode. Control is performed so that the audio data to be output is not interrupted.
Further, the system controller 5 operates when the power supply to the spindle motor 17 to the decoder 21 is stopped,
Stores the final playback address of audio data.

When the power supply to the spindle motor 17 to the decoder 21 is stopped at the time t14 shown in FIG. 9A, the reading of the audio data from the optical disk 1 is stopped, so that the operation shown in FIG. R from time t14
The remaining amount of audio data in the AM 22 decreases. The system controller 5 indicates that the remaining amount of voice data is as shown in FIG.
When the amount becomes equal to or less than the predetermined amount L as shown at time t15 in (f), the spindle motor 17 to the decoder 21 are again controlled to start power supply as shown in FIG. .. As a result, the servo control circuit 20 operates from time t16 in FIG. 9B, the spindle motor 17 is driven to rotate again, the decoder 21 is driven from time t16 in FIG. 9E, and the spindle motor 17 in FIG. From time t17,
The optical head 18 is accessed at the reproduction end address where the audio data was reproduced before, and the time t1 in FIG.
The reproduction of the audio data is restarted from 7.

As a result, the remaining amount of audio data in the RAM 22 increases again from time t17 in FIG. 9 (f). The system controller 5 detects the remaining amount of the audio data, and when the remaining amount of data in the RAM 22 becomes a predetermined amount M or more as shown at time t18 in FIG. 9F, as shown in FIG. Then, the power supply to the spindle motor 17 to the decoder 21 is stopped.

The system controller 5 repeats such control in the reproduction mode.

The system controller 5 stores the final address for reproducing the audio data when the power supply to the spindle motor 17 to the decoder 21 is stopped as described above, and the optical head 18 is Since the optical head 18 is stopped near the address at which the audio data was previously reproduced, the optical head 18 can easily and quickly access the reproduction final address at which the audio data was previously reproduced.

As described above, in the reproduction mode, the system controller 5 detects the remaining amount of voice data in the RAM 22, and the remaining amount of voice data is the predetermined amount M.
When the above time is set as the reproduction stop period, the power supply to the optical head 18 and the decoder 21 and the power supply to the spindle motor 17, the RF circuit 19, and the servo control circuit 20 are controlled to be off. It is possible to omit a wasteful operation of repeating the track jump during the reproduction stop period and holding the last position on the track where the audio data was reproduced before, and it is possible to save power consumption.

Therefore, when the disc recording / reproducing apparatus is driven by a battery, the battery life can be extended and the driving time can be extended.

As is clear from the above description, in the disc recording / reproducing apparatus according to the present embodiment, in the recording mode, the system controller 5 causes the decoders 21 to 21 of the reproducing system 6 which are unnecessary for recording audio data. The power supply to the digital output circuit 26 is turned off, the remaining amount of audio data in the RAM 13 is detected, and when the remaining amount of the audio data becomes a predetermined amount G or less, the recording stop period is set as the encoder. 14 to power supply to the magnetic head 16 and the optical head 18 and power supply to the spindle motor 17, the RF circuit 19 and the servo control circuit 20 are controlled to be off, respectively, so that the next audio data is recorded during the recording stop period. The track jump is repeated until the last record on the track where the audio data was recorded before. Can omit the unnecessary operation for holding, it is possible to save power consumption.

Therefore, when the disc recording / reproducing apparatus is driven by a battery, the battery life can be extended and the driving time can be extended.

In the reproducing mode, the system controller 5 controls the power supply to the LPF 10 to the magnetic head 16 of the recording system 2 which is unnecessary for reproducing the audio data, and the RAM 22 of the reproducing system 2. Detects the remaining amount of audio data that is once stored and read in
The power supply to the optical head 18 and the decoder 21 and the spindle motor 1 are defined as the reproduction stop period when the remaining amount of the audio data becomes a predetermined amount or more.
7. By turning off the power supplied to the RF circuit 19 and the servo control circuit 20, respectively, the track jump is repeated during the reproduction stop period, and the last position on the track where the audio data was reproduced before is held. Useless operation can be omitted, and power consumption can be saved.

Therefore, when the disc recording / reproducing apparatus is driven by a battery, the battery life can be extended and the driving time can be extended.

In the disc recording / reproducing apparatus of the above embodiment, for example, the power consumed when reproducing audio data from the optical disc 1 is 1 W, and the power consumed when outputting the reproduced audio data is 100 mW. age,
The duty of recording the above intermittent audio data is set to 1/4.
In the reproduction, the power consumption is controlled in the reproduction stop period so that the power consumption is 1 W + 100 mW = 1.1 W in the related art. However, in the disc recording / reproducing apparatus according to the present embodiment, 1 W × (1 / 4) +100 mW = 0.35 W, the audio data can be reproduced from the optical disk 1 with the power consumption of about 1/3 of the conventional power consumption, and the power consumption can be sufficiently saved.

[0084]

In the disc recording apparatus according to the present invention, the control means detects the remaining amount of the record data temporarily stored in the storage means when recording the record data on the optical disc,
When the remaining amount of the recording data in the storage means becomes less than a predetermined amount, the recording means for reading the recording data from the storage means and recording it on the optical disc and the power supply to the rotation drive control means for the optical disc are controlled to be turned off. By doing so, it is possible to save the power consumption of the disc recording apparatus.

Therefore, it is possible to achieve long-term driving of the disk recording apparatus when it is driven by a battery.

Further, the disc reproducing apparatus according to the present invention is
The control unit detects the remaining amount of the recording data temporarily stored in the storage unit when reproducing the recording data recorded on the optical disc, and the remaining amount of the recording data in the storage unit is equal to or more than a predetermined amount. In this case, the power consumption of the disc reproducing apparatus can be saved by controlling the reproducing means for reproducing the recorded data from the optical disc and supplying it to the storing means and the power supply for the rotation drive controlling means of the optical disc. Can be planned.

Therefore, it is possible to achieve long-term driving of the disc reproducing apparatus when driven by a battery.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a disk recording / reproducing apparatus in which the disk recording apparatus and the disk reproducing apparatus according to the present invention are integrated into one apparatus.

FIG. 2 is a schematic plan view for explaining the structure of an optical disc provided in the disc recording / reproducing apparatus of the above embodiment.

FIG. 3 is a diagram showing a recording state of recording data of one cluster recorded on the optical disc.

FIG. 4 is a diagram showing a specific recording mode of TOC data recorded on the optical disc.

FIG. 5 is a diagram showing a memory state for explaining memory control in the recording mode of the disc recording / reproducing apparatus of the embodiment.

FIG. 6 is a block diagram of an optical head provided in the disk recording / reproducing apparatus of the above embodiment.

FIG. 7 is a time chart for explaining a power supply state to each unit in the recording mode of the disc recording / reproducing apparatus of the above-mentioned embodiment.

FIG. 8 is a diagram showing a memory state for explaining memory control in the reproducing mode of the disc recording / reproducing apparatus of the embodiment.

FIG. 9 is a time chart for explaining a power supply state to each unit in the reproduction mode of the disc recording / reproducing apparatus of the above embodiment.

[Explanation of symbols]

1 ・ ・ ・ ・ ・ ・ ・ ・ Optical disc 2 ・ ・ ・ ・ ・ ・ Recording system 3 ・ ・ ・ ・ ・ ・ ・ ・ Display unit 4 ・ ・····· Keyboard 5 ······· System Controller 6 ················・ ・ ・ ・ ・ ・ ・ Low-pass filter 11 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ A / D converter 12 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ATRAC encoder 13 ・ ・ ・ ・ ・ ・RAM 14 Encoder 15 Magnetic head drive circuit 16 Magnetic head 17 --- Spindle motor 18 --- Optical head 19 --- RF amplifier 20 ---・ ・ ・ ・ ・ ・ ・・ ・ ・ Servo control circuit 21 ・ ・ ・ ・ ・ Decoder 22 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ RAM 23 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ATRAC Decoder 24・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ D / A converter 25 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Low-pass filter 26 ・ ・ ・ ・ ・ ・ ・ Digital output circuit A ₁₀ ............ playback only area A ₁₁ ............ data area A ₁₂ ............ lead-in area A ₂₀ ······· Recording / reproducing area A ₂₁ ····· Data area A ₂₂ ····· Lead-in area

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location G11B 27/10 A 8224-5D

Claims (2)

[Claims] 1. A disk recording device for temporarily storing recording data in a storage means, reading the recording data once stored in the storage means for each predetermined amount and recording the recording data on an optical disc, wherein the recording data is recorded on the optical disc. At this time, the remaining amount of the recording data temporarily stored in the storage unit is detected, and when the remaining amount of the recording data in the storage unit becomes equal to or less than a predetermined amount, the recording data is read from the storage unit and the optical disc is read. A disc recording apparatus comprising: a recording unit for recording on the optical disc and a control unit for controlling the power supply to the rotation drive control unit of the optical disc. 2. A disk reproduction in which the recording data recorded on the optical disk is reproduced for each predetermined amount and temporarily stored in the storage means, and the recording data once stored in the storage means is continuously read and output. The apparatus detects the remaining amount of the recording data temporarily stored in the storage unit when reproducing the recording data recorded on the optical disc, and the remaining amount of the recording data in the storage unit is a predetermined amount. When the above is the case, a disc having reproduction means for reproducing the record data from the optical disc and supplying it to the storage means, and control means for turning off the power supplied to the rotation drive control means of the optical disc. Playback device.