JPH07296510A - Information recording/reproducing device - Google Patents

Abstract

PURPOSE:To reproduce audio signal data from a recording medium by making the reproduction output level thereof the same as that during recording irrespective of a difference in reproduction output levels during recording. CONSTITUTION:During reproducing, a system controller 16 controls a servo circuit 15 based on TOC information, reads a peak value and an average level corresponding to data reproduced from the TOC information, calculates corresponding ratios by comparing them with preset values and uses them as control signals. A level controller 7 adjusts the reproduction output level of inputted digital information based on the control signals so as to make it the same as the preset value and also, a tone controller 9 adjusts the sound characteristic of inputted analog information based on the control signals so as to make it the same as a preset characteristic.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing apparatus such as a magneto-optical recording / reproducing apparatus.

[0002]

2. Description of the Related Art Conventionally, the data is TOC (Table Of Contents).
nts) A recording medium managed by index information such as information is used, and when the recording medium is attached to the apparatus, the index information is read out and stored in a storage means such as an IC memory and stored in this storage means. There is one that controls reproduction and recording of audio signal data based on index information, which will be described below.

The reproduction of the audio signal data is performed by recognizing the delimiter of the data by the index information stored in the storage means, and the recording of the audio signal data is performed by the index information stored in the storage means. After recording the audio signal data, the index information stored in the storage means is rewritten to the index information according to the recording result, and the index information of the storage means is used as the index information of the recording medium. Was being rewritten.

[0004]

In the above-mentioned conventional apparatus, the audio signal data recorded on the recording medium by the storage means is, for example, an audio signal analog-reproduced by a compact disc player or an audio signal received by a radio. , And a voice signal collected by the microphone.

However, a compact disc player,
Even when reproducing and collecting the same audio signal data on the radio and microphone, due to the difference in reproduction accuracy when reproducing and outputting the audio signal data and the difference in sound collection accuracy when collecting sound, When the audio signal is recorded on the recording medium by the recording means, the audio signal data has different levels for reproduction and output, and the reproduction output varies depending on the device for reproducing and collecting the audio signal data and its accuracy. There is a problem that the audio signal data of the level is recorded on the recording medium. When audio signal data of different reproduction output levels are recorded on the same recording medium, the audio signal data is reproduced from this recording medium. Then, since the playback output level switches during playback of the audio signal data,
When attempting to reproduce the reproduction output level at the same level in the recording medium, there is a problem that it is necessary to judge by listening to the user every time the reproduction output level is switched and manually adjust the volume or the sound quality. there were.

According to the present invention, the reproduction output level of the audio signal data at the time of reproducing the audio signal data from the recording medium, regardless of the device for reproducing and collecting the audio signal data recorded on the recording medium and the difference in accuracy thereof. It is an object of the present invention to provide an information recording / reproducing apparatus capable of automatically reproducing data at the same level.

[0007]

The present invention uses a recording medium in which audio signal data and index information are recorded,
The reading means for reading the audio signal data and the index information from the recording medium, and the control means for controlling the reproduction and the recording of the audio signal data on the basis of the index information read by the reading means are provided. In an information recording apparatus that rewrites index information corresponding to the audio signal data to the index information of the recording medium when the audio signal data is recorded, the audio recorded in the recording medium when the audio signal data is recorded by the control unit. The control means includes a level detecting means for detecting a peak value and an average value of the signal, and a storage means for storing the peak value and the average value detected by the level detecting means, and the control means is a voice recorded on the recording medium. When the signal data is read out by the reading means and reproduced and output, It is to set the playback output level based on 憶 peak value and average value.

Further, the control means records the peak value and the average value stored in the storage means as index information on the recording medium after recording the audio signal data, while recording on the recording medium. When the read out means reads out the reproduced audio signal data and reproduces and outputs it, the reproduction output level is set based on the peak value and the average value as the index information read out by the read out means.

[0009]

Therefore, when the audio signal reproduced by the other device or the audio signal collected by the microphone is recorded on the recording medium by the recording means, the peak value of the audio signal recorded on the recording medium by the level detecting means. And the average value are detected, the detected peak value and average value are stored in the storage means, and when the audio signal data recorded on this recording medium is read out by the reading means and reproduced, the control means is the storage means. By setting the playback output level based on the peak value and average value stored in, even when audio signal data with different playback output levels are recorded on the recording medium, In, the reproduction output level of the audio signal data can be automatically reproduced at the same level.

Further, when recording the audio signal reproduced by another device or the audio signal collected by the microphone on the recording medium by the recording means, the audio detected by the level detecting means and stored in the storing means The control means records the peak value and the average value of the signal on the recording medium as index information at the end of recording the audio signal data, and when the audio signal recorded on the recording medium is read by the reading means and reproduced, the control means By setting the reproduction output level based on the peak value and the average value as the index information read at the same time, even when audio signal data of different reproduction output levels are recorded on the recording medium, When reproducing audio signal data, set the reproduction output level of the audio signal data. Manner can be played at comparable levels, it is possible to manage the peak value and average value required for reproduction output level set for each recording medium.

[0011]

Embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a schematic structure of a magneto-optical disk device as an information recording / reproducing apparatus according to an embodiment of the present invention, and FIG. 2 shows a recording state of a disk used in the magneto-optical disk device. 3 is a flow chart showing an audio signal data recording operation in the magneto-optical disk device, and FIG. 4 is a flow chart showing an audio signal data reproducing operation in the magneto-optical disk device.
The magneto-optical disk device as an information recording / reproducing apparatus according to the present invention is adapted to digitize and record audio signal data, which is an analog signal, on a magneto-optical disk.

Referring to FIG. 1, the data reproducing operation will be described. The optical pickup 1 irradiates a disk 21 as a recording / reproducing recording medium with light, and the disk 21
It is a reproducing head that captures the reflected light from
The RF signal recorded in 1 is read.
The RF amplifier 2 amplifies the RF signal read by the optical pickup 1 and sends it to the encoder / decoder / signal processing circuit 3. Also, RF amplifier 2
Generates a servo control signal such as a focus error signal and a tracking error signal from the signal, and the servo circuit 4
It is designed to be sent to. Encoder / Decoder /
The signal processing circuit (hereinafter referred to as a signal processing circuit) 3 includes a system controller 16 for processing subcodes and the like.
It is provided so that it can communicate with
The F signal is demodulated and converted into digital information, and the digital information is subjected to predetermined processing such as error correction and transferred to the memory controller 4.

The memory controller 4 includes a signal processing circuit 3
The writing operation and the reading operation of the shock proof memory 5 are controlled in accordance with the instruction of the system controller 16 so that the digital information after the above is stored in the shock proof memory 5. The memory controller 4 transfers the digital information output from the signal processing circuit 3 to the shock proof memory 5 and transfers the digital information output from the shock proof memory 5 to the data expansion / compression circuit 6. There is.

The shock proof memory 5 is adapted to temporarily store the digital information output from the signal processing circuit 3, and a DRAM (Dynamic Random Access).
Memory). The shock proof memory 5 is arranged between the signal processing circuit 3 and the data expansion / compression circuit 6, and protects digital information in order to prevent interruption of recording / reproduction due to disturbance such as vibration. It is provided for the purpose of absorbing the difference between the transfer speed of the digital information output from the signal processing circuit 3 and the transfer speed of the digital information input to the data expansion / compression circuit 6.

The data decompression / compression circuit 6 decompresses the digital information output from the memory controller 4 and time-compressed at a predetermined compression rate on the time axis and transfers it to the level controller 7, where the system controller 16 outputs the data. After the reproduction output level is adjusted based on the control signal, it is transferred to the D / A converter 8a of the comparator 8. D /
The A converter 8a reproduces the original analog information and transfers it to the tone controller 9, where it adjusts the sound quality based on the control signal from the system controller 16 and then transfers it to the amplifier 10. The amplifier 10 amplifies the analog information from the tone controller 9 and then adds it to the speaker 11 to emit the sound to the outside. The A / D converter 8b will be described later.

The feed motor 12 is a motor for moving the optical pickup 1 in a direction perpendicular to a recording track (not shown) of the disk 21. Spindle motor 1
3 is a motor for rotating the disk 21.
The driver circuit 14 supplies power to the feed motor 12, the spindle motor 13, and a drive device (not shown) that drives the objective lens (not shown) of the optical pickup 1 in order to operate them. There is.

The servo control circuit 15 includes the optical pickup 1
This is a circuit for field-back controlling each of the above-mentioned devices driven by the driver circuit 14 so that the operation of causing the light emitted from the optical disc to follow the target recording track of the disk 21 is accurately performed. This servo control circuit 15
According to an instruction from the system controller 16, a control amount such as focus, tracking, and spin is determined based on the servo signal output from the RF amplifier 2, and the control amount is sent to the driver circuit 14 as a control signal. .

System controller (control means) 16
Is a signal processing circuit 3, a memory controller 4, a level controller 7, a tone controller 9, and a servo circuit 1.
5, the microcomputer that centrally manages the power supply circuit 17, and the head drive device 18, and includes the peak value and the average level detected by the signal processing circuit 3 in the TOC information.

The memory 17 stores the TOC information read from the disk 21 and the latest TOC information created by the system controller 16.

The input device 20 is composed of switches and keys (not shown). For example, after the switch is turned on to enable input, a manual input operation with a keyboard or the like causes a command to write a plurality of digital information to the disk 21. Etc. to the system controller 16.

To describe the data recording operation, an analog output terminal from a compact disc player, an output terminal from a radio, a microphone, etc. are connected to the input terminal IN, and the A / D converter 8b has an input terminal. The analog information input from IN is converted into digital information and transferred to the data expansion / compression circuit 6. The data expansion / compression circuit 6 includes an A / D converter 8
The time axis of the digital information output from b is compressed to a predetermined compression rate, for example, about 1/5 and transferred to the memory controller 4.

The memory controller 4 transfers the digital information output from the data decompression / compression circuit 6 to the shock proof memory 5 and is stored in the shock proof memory 5 when the digital information is not read from the shock proof memory 5. The data amount of the digital information is detected by monitoring the address of the shock proof memory 5, and the detection result is output to the system controller 16. Then, when the data amount of the shock proof memory 5 reaches a predetermined value, the system controller 16 outputs the digital information stored in the shock proof memory 5 to the signal processing circuit 3. At this time, the memory controller 4 moves the shockproof memory 5
It is also intended to absorb the difference between the digital information output from the digital processing unit and the transfer speed of the digital information input to the signal processing circuit 3.

The signal processing circuit 3 includes a memory controller 4
The peak value of the digital information output from the CPU is detected and stored, and the signal level data is detected at any time in a predetermined synchronization to calculate the average level data, and the digital information from the memory controller 4 is modulated into an RF signal. The data is converted and transferred to the head drive device 18.

The head driving device 18 transfers the RF signal output from the signal processing circuit 3 to the recording head 19, and the recording head 19 accurately records the RF signal on the target recording track of the disk 21. As described above, the recording head 19 is moved in the direction orthogonal to the recording track of the disk 21. Recording head 19
Records an RF signal in the recording area of the disk 21.

As shown in FIG. 2, the disc 21 used for recording and reproducing has a lead-in area in which disc control signals and the like are recorded in order from the inner peripheral side to the outer peripheral side of the disc, as shown in FIG. User T as a writing area for writing information about a plurality of recorded data groups
It has an OC area, a program area for recording a plurality of individually completed data groups, and a lead-out area in which a disk control signal and the like are recorded.

The level detecting means is constituted by the signal processing circuit 3 and the storing means is constituted by the memory 17, and the peak value and the average level detected by the signal processing circuit 3 are included in the TOC information by the system controller 16. And stored in the memory 17.

The operation during recording in the magneto-optical disk device configured as described above will be described. When the disk 21 is mounted on the magneto-optical disk device, the optical pickup 1 causes the RF from the user TOC area of the disk 21.
The signal is read. Then, this RF signal is amplified by the RF amplifier 2, demodulated or subjected to predetermined signal processing by the signal processing circuit 3 and restored as TOC information, and then the memory 1
Stored in 7.

At the time of recording, required TOC information is read from the memory 17 and sent to the system controller 12 in response to a request from the system controller 12. Then, the system controller 12 makes the servo circuit 1 based on the TOC information.
Control 1

When a data recording command is issued from the input device 16, the system controller 12 recognizes the start address and end address of the recordable area of the disk 21 based on the TOC information, and selects a recording area based on the recordable area. Then, the servo circuit 15 sends the optical pickup 1 and the recording head 19 to a target recording track to control the rotation speed of the disk 21 to a predetermined value, and the position of an objective lens (not shown) accurately follows the recording track. To be driven.

When the audio signal data is input to the input terminal IN as analog information, the A / D converter 8
After being converted to digital information by b, the data decompression /
The data is sent to the compression circuit 6, where it is time-axis compressed at a predetermined compression rate, sent to the memory controller 4, and temporarily stored in the data area of the shock proof memory 5.

When the memory controller 4 detects that the digital information of the shock proof memory 5 is stored up to the full capacity, it outputs the detection result to the system controller 16, and the system controller 16 stores the memory based on the detection result. Control the controller 4,
The digital information stored in the data area of the shock proof memory 5 is read in the order in which the digital information is written, and the read digital information is detected by the signal processing unit 3 for the peak value and the average level. The detected value is output to the optical pickup, and the digital information is modulated by the signal processing circuit 3 and subjected to a predetermined signal processing to become an RF signal, which is sent to the recording head 15 via the head drive circuit 14 and then the optical pickup. It is recorded in the program area of the disc 21 by the interaction with the light from 1.

When the data amount of the digital information stored in the data area of the shock proof memory 5 decreases to a predetermined amount, the system controller 12
Controls the memory controller 4 to stop reading digital information from the data area of the shock proof memory 5. At this time, if the audio signal data is input to the input terminal IN, the same operation as described above is repeated, and if the audio signal data is not input,
Judge that the data recording is finished.

When it is judged that the data recording is completed,
The system controller 16 creates TOC information corresponding to the data recorded contents of the disc 21 after digital information recording, and the created TOC information includes the peak value stored in the signal processing unit 3 and the calculated average level data. T stored in the memory 17 including
TOC created by the system controller 16 for OC information
Rewrite as information. Then, the same processing as at the time of recording data is performed, and the created TOC information is recorded in the user TOC area of the disc 21.

The operation control during recording will be described with reference to the flowchart shown in FIG.

At step F1, it is confirmed whether the disc 21 is loaded, and if it is loaded, the process proceeds to step F2. Then, the user TOC information is read in step F2, and the process proceeds to step F3.

In step F3, the storage of the data to be recorded in the program area of the disk 21 in the shock proof memory 5 is started, and the process proceeds to step F4, and step F4.
Then, it is judged whether or not the amount of data stored in the shock proof memory 5 is full, and if it is not full, this judgment is repeated until it is full, and if full, step Moved to F5.

At step F5, a predetermined number of times N is counted, then the routine proceeds to step F6, where the data stored in the shock proof memory 5 is read and the routine proceeds to step F7. In step F7, the peak value of the signal read in step F6 is detected and stored, and at the same time signal level data is accumulated, and the process proceeds to step F8.

In step F8, the data stored in the shock proof memory 5 read in step F6 is recorded in the program area of the disk 21, and when the data in the shock proof memory 5 is exhausted, the process proceeds to step F9.

In step F9, it is judged whether or not the data to be recorded in the program area is not input. If it is input, the process proceeds to step F4. If it is not input, the data is recorded in the program area of the disk 21. When it is confirmed that the process is completed, the process proceeds to step F10, where the average level L is calculated using the predetermined number N counted in step F5 and the signal level data accumulated in step F7, and the process proceeds to step F11. .

In step F11, the TOC information corresponding to the program area of the disc 21 after data recording is created, and the created TOC information is added to the step F11.
The peak value stored in step 7 and the average level L calculated in step F10 are included, the process proceeds to step F12, the TOC information is stored in the TOC storage area of the shock proof memory 5, and the process proceeds to step F13. Step F
In step 13, the TOC information of the shock proof memory 5 stored in step F12 is recorded in the user TOC area of the disc 21, and this flow chart ends.

Therefore, the peak value and level average value of the signal detected at the time of data recording are stored in the shock proof memory 5 as TOC information and also recorded in the user TOC area of the disc 21.

Next, the operation during reproduction will be described.

When the disk 21 is mounted on the magneto-optical disk device, the optical pickup 1 reads out an RF signal from the user TOC area of the disk 21. Then, this RF signal is amplified by the RF amplifier 2, and the signal processing circuit 3
After being demodulated and subjected to predetermined signal processing to be restored as TOC information, the TOC information is sent to the memory controller 4, where it is stored in the TOC storage area provided in the shock proof memory 5.

At the time of reproduction, the TOC information required in response to a request from the system controller 16 is read from the memory 17 and sent to the system controller 16. Then, the system controller 16 makes the servo circuit 1 based on the TOC information.
5, the peak value and the average level corresponding to the data to be reproduced are read out from the TOC information, and compared with preset values to calculate the corresponding ratios, which are used as control signals.

When a disc playback command is issued from the input device 20, the system controller 16 recognizes the start address and end address of each song from the TOC information and, based on this information, an optical pickup is performed from the program area of the disc 21. The RF signal is read by 1. This RF signal is amplified by the RF amplifier 2, demodulated or subjected to predetermined signal processing by the signal processing circuit 3, restored as digital information, and sent to the memory controller 4. At this time, the digital information is data in a time axis compressed state.

On the other hand, the RF signal amplified by the RF amplifier 2 is also sent to the servo circuit 15 as a servo control signal used for feedback control. Servo control circuit 1
Reference numeral 5 determines a control amount according to an instruction from the system controller 16 based on the servo control signal, and outputs the control signal to the driver circuit 14. Then, the driver circuit 14 operates the feed motor 12, the spindle motor 13, and the objective lens driving device of the optical pickup 1 according to the magnitude of the control signal. As a result, the optical pickup 1 is sent to the target recording track, and the disc 2
The number of revolutions of 1 is controlled to a predetermined value, and the position of the objective lens (not shown) is driven so as to accurately follow the recording track.

The digital signal sent to the memory controller 4 is written and temporarily stored in the data area of the shock proof memory 5, and is read out to the memory controller 4 in the written order. Then, the digital information output from the memory controller 4 is sent to the data expansion / compression circuit 6, where the time axis expansion is performed, and the digital information that has passed through the data expansion / compression circuit 6 is input to the level controller 7.

The level controller 7 is adjusted based on the control signal based on the ratio calculated by the system controller 16 so that the reproduction output level of the input digital information becomes a preset value and the D / A converter 7a is adjusted. It is output, converted into the original analog information by the D / A converter 7a, and then output to the tone controller 9.

The tone controller 9 is also adjusted based on the control signal based on the ratio calculated by the system controller 16 so that the sound quality characteristic of the input analog information has a preset characteristic and is output to the amplifier 10. After being amplified by the amplifier 10, it is added to the speaker and output as an audio signal to the outside.

The operation control during reproduction will be described with reference to the flow chart shown in FIG.

In step F21, it is confirmed whether or not the disk 21 is loaded, and if it is loaded, the process proceeds to step F22. Then, the user TOC information is read in step F22, and the process proceeds to step F23.

In step F23, the peak value and level average value included in the TOC information read in step F22 are compared with preset values, and the corresponding ratios are calculated, and the process proceeds to step F24. , The level controller 7 and the tone controller 9 according to the control signal based on the ratio calculated in step F23.
Is controlled so that the reproduction output becomes a preset value, and the process proceeds to step F25.

In step F25, the reproduction data read from the program area of the disk 21 is intermittently stored in the shock proof memory 5, and step F26 is performed.
Then, the data stored in the shock proof memory 5 are sequentially read in the stored order and the process proceeds to step F27.

In step F27, the data stored in the shock proof memory 5 read in step F26 is subjected to predetermined signal processing, reproduced by the speaker 11 and output to the outside, and the process proceeds to step F28. Step F
In step 28, it is judged whether or not the reproduction is completed based on the read TOC information. If it is not judged that the reproduction is completed, the procedure goes to step F23 to repeat the above operation, and it is judged that the reproduction is completed. If so, this flowchart is ended.

Therefore, by using the peak value and level average value of the signal detected at the time of data recording for adjusting the reproduction output level at the time of reproduction, analog information having different reproduction outputs at the time of data recording on the disk 21 is recorded. By the way, during reproduction, the reproduction output level can be automatically reproduced at the same level.

In the present embodiment, the peak value and level average value detected by the signal processing circuit 3 are calculated for each recording end unit and included in the TOC information, but the present invention is not limited to this. For example, when the switching of the music information is clear like a compact disc, the peak value and the level average value detected by the signal processing circuit 3 are calculated every time the music information is switched so as to be included in the TOC information. Is also good.

[0058]

As described above, according to the present invention, when the audio signal reproduced by another device or the audio signal collected by the microphone is recorded on the recording medium by the recording means,
The level detection means detects the peak value and the average value of the audio signal recorded on the recording medium, and the detected peak value and the average value are stored in the storage means, and the audio signal data recorded on the recording medium. When the data is read out by the reading means and reproduced, the control means sets the reproduction output level based on the peak value and the average value stored in the storage means, so that the audio signal data having different reproduction output levels can be recorded on the recording medium. Even when recorded, the playback output level of the audio signal data can be automatically played back at the same level when the audio signal data is played back, so that the playback output can be switched by listening to the user. It is possible to eliminate the hassle of having to judge and manually adjust the volume or sound quality.

When a voice signal reproduced by another device or a voice signal collected by a microphone is recorded on the recording medium by the recording means, it is detected by the level detection means and stored in the storage means. When the peak value and the average value of the audio signal are recorded in the recording medium as index information by the control means at the end of the recording of the audio signal data, and the audio signal recorded in the recording medium is read out by the reading means and reproduced,
This is a case where the control means sets the reproduction output level based on the peak value and the average value as the index information read out at the same time, whereby the audio signal data of different reproduction output levels are recorded on the recording medium. Even when the audio signal data is reproduced, the reproduction output level of the audio signal data can be automatically reproduced at a similar level. Therefore, the user can judge the reproduction output switching by listening and adjust the volume manually. Alternatively, it is possible to eliminate the inconvenience of having to adjust the sound quality, and to manage the peak value and average value required for setting the reproduction output level for each recording medium. The capacity can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing an outline of a magneto-optical disk device as an information recording / reproducing device which is an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a recorded state of a disc used in the magneto-optical disc device.

FIG. 3 is a flowchart showing a control operation during recording in the magneto-optical disk device.

FIG. 4 is a flowchart showing a control operation during reproduction in the magneto-optical disk device.

[Explanation of symbols]

 1 optical pickup 2 RF amplifier 3 encoder / decoder / signal processing circuit 4 memory controller 5 shock proof memory 6 data expansion / compression circuit 7 level controller 8 converter 9 tone controller 10 amplifier 11 speaker 12 feed motor 13 spindle motor 14 driver circuit 15 servo Control circuit 16 System controller 17 Power supply circuit 18 Head drive circuit 19 Recording head 20 Input device 21 Disk

Claims (2)

[Claims] 1. A recording medium on which audio signal data and index information are recorded is used. Based on the reading means for reading the audio signal data and the index information from the recording medium, and the index information read by the reading means. An information recording apparatus, comprising: a control unit for controlling reproduction and recording of audio signal data, and rewriting the index information corresponding to the recording of the audio signal data by the control unit to the index information of the recording medium. A level detecting means for detecting a peak value and an average value of an audio signal to be recorded on the recording medium when recording the audio signal data by the control means, and a peak value and an average value detected by the level detecting means. And a storage means for storing, wherein the control means is for recording the sound recorded in the recording medium. When read out and reproduced output by the means reading the signal data, the information recording and reproducing apparatus characterized by setting the reproduction output level based on the peak value and the average value stored in the storage means. 2. The control means, after recording the audio signal data, records the peak value and the average value stored in the storage means as index information on the recording medium, while recording them on the recording medium. 2. The reproduction output level is set based on the peak value and the average value as the index information read by the reading means when the read audio signal data is read by the reading means and reproduced and output. Information recording / reproducing device.