JPH10275404A - Sound recording system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sound recording system for recording only a sound in good condition by detecting the abnormality of a recording signal and stopping the recording upon detection of the abnormality and bringing a recording starting position after stopping the recording back to a position prior to the recording. SOLUTION: When a signal outputted from an A/D converter 18 is abnormal, a command signal is outputted by an MD recording processing part 11 to a microcomputer 1 to control this abnormal signal of a CD to be read and outputted to the processing part 11 again. Afterward, this data in a memory 12 is processed for correction by the signal outputted from the converter 18. Then, when the abnormality of a signal recorded on an MD is detected, its detecting signal is received by an MD reproducing processing part 14 to output a signal for the purpose of performing such operation that the relevant data is read out of the memory 12 again, and rewriting is carried out by an optical pickup. Then, when such data correction utilizing the memory 12 is not feasible, a signal showing recording abnormality is outputted to the microcomputer 1. A track where the abnormality is detected is nullified by the microcomputer 1, and recording is performed from the next head part of music.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus for recording a digital audio signal on a disk, and more particularly to a recording apparatus suitable for a recording apparatus mounted on a moving body such as an automobile.

[0002]

2. Description of the Related Art As a device for recording an audio signal such as music, a digital disk recorder for recording a digital signal on a disk, for example, a mini disk (MD (registered trademark))
Recording devices called recorders have become widespread. If this MD recorder is used, it is possible to reproduce music or the like with low noise and good sound quality (less distortion and the like) by using a data correction technique by digital signal processing and the like. It is possible to easily and quickly select a desired tune or the like according to the data for the tune selection or the like.

[0003]

As described above, according to the MD recorder or the like, it is possible to easily listen to favorite music and the like with high sound quality, but if the recording itself is not going well, the data can be corrected by digital processing. Even if it does, there is a limit to the correction, and it may not be possible to listen to music or the like comfortably. For example, if skipping occurs in the input signal itself to be recorded, the same skipping occurs during playback, and if a radio broadcast or the like with a poor reception condition and a lot of noise is recorded, the playback will be continued. At times, it is also noisy. In particular, in the case of recording by a recording device for an automobile in which the influence of vibration and the like is large and the reception state of a radio or the like constantly changes with movement, such a state at the time of recording becomes a problem.

[0004] The present invention has been made in view of the above problems, and has as its object to provide a recording apparatus that performs only recording in a good state.

[0005]

In order to achieve the above object, a recording device (1) according to the present invention detects an abnormality in a recording signal in a recording device that records a sound on a disk by a digital signal. Abnormality detection means, a recording stop means for stopping recording when an abnormality of the recording signal is detected by the abnormality detection means, and a recording start position after the recording is stopped by the recording stop means, Recording position return means for returning to a position.

According to the recording device (1), if there is an abnormality such as a skip in the signal to be recorded, the recording is stopped, and the next recording start position is set to the position before the recording in which the recording signal was abnormal. Position, that is, it is the state before recording assuming that there was no abnormal recording, so that music that is abnormal and difficult to hear is not recorded / played back, and the recording start position even when re-recording You do not need to search for.

[0007] A recording device (2) according to the present invention is a recording device for recording a sound on a disk by a digital signal, wherein a tune head detecting means for detecting a tune head which is a start portion of a tune to be recorded; Song head recording position storage means for storing the recording position of the tune head based on the detection signal of the head detection means, abnormality detection means for detecting an abnormality of the recording signal, and when the abnormality of the recording signal is detected by the abnormality detection means Recording stop means for stopping the recording of the song in which the abnormality is detected, and a recording start position after the recording is stopped by the recording stop means, based on the abnormality of the recording signal stored in the song head recording position storage means. Recording position return means for returning to the recording start position of the detected tune.

According to the recording device (2), if there is an abnormality such as skipping in the signal to be recorded, the recording is stopped, and the next recording start position is determined before the music having the abnormal recording signal is recorded. In other words, it will be in the state before recording of the song as if there was no abnormal song, so music that is abnormal and difficult to hear will not be recorded / reproduced, and even when re-recording There is no need to search for the recording start position. Further, when a plurality of music pieces are continuously recorded, it is possible to continuously record other music pieces except for the music piece having an abnormality, which is very convenient.

In the sound recording device (3) according to the present invention, in the sound recording device (1) or (2), the abnormality detecting means detects an abnormality from a skip of a digital signal to be recorded. It is characterized by.

According to the recording device (3), it is possible to perform appropriate processing on an input audio signal having skipped sound.
This is effective against vibration when the recording medium on the reproducing side such as a disc has scratches or dirt, or when mounted on an automobile.

Also, in the recording device (4) according to the present invention, in the recording device (1) or (2), the abnormality detecting means detects an abnormality from a skip of a recorded digital signal. It is characterized by:

According to the recording apparatus (4), appropriate processing can be performed not only when there is a skip in the input signal but also when the input signal has a skip, such as when recording, etc. This is effective against a case where a recording medium such as a recording-side disk has scratches or dirt, or a case where the recording medium is mounted on an automobile.

[0013] Also, in the recording device (5) according to the present invention, in the recording device (1) or (2), the abnormality detecting means detects an abnormality from a reception radio wave state of a radio broadcast to be recorded. It is characterized by:

According to the recording device (5), appropriate processing can be performed for the deterioration of the reception state of the radio broadcast, and the reception state changes due to the movement of the automobile, for example, noise caused by a decrease in the electric field strength. It is effective against generation, multipath noise, and the like.

Further, the recording device (6) according to the present invention is characterized in that in the recording device (1) or (2), the abnormality detecting means detects an abnormality from a vibration state of the recording device. And

According to the recording device (6), when it is estimated that recording is not performed well due to strong vibration, appropriate processing is performed, and the recording device (6) is effective against a rough road running state of an automobile and the like. It will be.

In the recording device (7) according to the present invention, in the recording device (1) or (2), a signal storage means for storing a signal to be recorded as a digital signal, and a signal stored in the signal storage means. Recording means for recording a signal on the disk, and, when an abnormality is detected in the signal to be recorded, re-reading the signal to be recorded, and re-storage means for storing the signal in the signal storage means, wherein the abnormality detection means comprises: When the recording signal cannot be corrected even by the re-storage means, an abnormality of the recording signal is detected.

According to the recording device (7), the signal to be recorded is temporarily stored and stored, and when an abnormality is detected, the signal is read again to prevent the recording abnormality. If the recording error cannot be avoided, processing such as stopping recording is performed, so that the possibility of normal recording increases.

In the recording device (8) according to the present invention, in the recording device (1) or (2), a signal storage means for storing a signal to be recorded as a digital signal, and a signal stored in the signal storage means. Recording means for recording a signal on the disk; and re-recording means for re-recording the signal stored in the signal storage means on the disk when an abnormality is detected in the recorded signal, wherein the abnormality detection means When the recorded signal cannot be corrected by the re-recording means,
It is characterized by detecting an abnormality in a recording signal.

According to the recording device (8), a signal to be recorded is temporarily stored and stored, and when an abnormality is detected, the signal is re-written so that the recording abnormality can be avoided. If the recording error cannot be avoided, processing such as stopping recording is performed, so that the possibility of normal recording increases.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A recording device according to an embodiment of the present invention will be described below. FIG. 1 is a block diagram illustrating a configuration of a recording device according to an embodiment. The recording apparatus according to the present embodiment includes a radio receiver such as FM / AM for receiving a radio broadcast, a compact disc player (CD player) for reproducing a compact disc (CD) which is a kind of optical disc, and a recordable light. It is configured to include a mini-disc recorder (MD recorder) capable of reproducing and recording a mini-disc (MD), which is a kind of magnetic disk. The microcomputer (microcomputer) 1 captures the operation state of the operation unit 19 composed of a switch, a volume, and the like, and according to the operation state, a radio receiver, C
It controls the operation of the D player and the MD recorder, and is composed of a microprocessor for performing arithmetic processing, a memory in which a program is stored, and the like. The radio receiving unit 2 controls the antenna AT based on a control signal from the microcomputer 1.
Tunes and demodulates the received radio broadcast wave, and outputs the demodulated radio broadcast audio signal to the changeover switch 3 and an analog / digital converter (A / D) 18 for converting an analog signal into a digital signal. Further, the radio receiving unit 2 has a reception state detecting circuit (not shown) for judging a reception state based on whether or not the reception electric field intensity is equal to or higher than a predetermined electric field intensity. Is output to the microcomputer 1. Note that the reception state detection circuit includes a detection rectifier circuit (not shown) for detecting and rectifying the output of the intermediate frequency amplification circuit of the radio receiver 2, and a comparison circuit (not shown) for comparing the output of the detection rectification circuit with a predetermined voltage. It is comprised including.

The optical pickup 6 irradiates a laser beam onto the CD, receives the reflected light, reads a digital signal recorded on the CD, and outputs the digital signal to the CD reproduction processing unit 7. The laser diode irradiates the laser beam. , An optical system such as a lens and a reflecting mirror, a light receiving element for receiving reflected laser light, a focus actuator comprising a magnet and a coil for focus control, a tracking actuator comprising a magnet and a coil for tracking control, (A light irradiating section is sent to a portion where the music is recorded).

The CD reproduction processing section 7 digitally processes the signal read by the optical pickup 6, and outputs an audio signal (digital) and a CD reproduction position (the number of the music being reproduced, from the beginning of the disc, and from the beginning of the music). A digital-to-analog converter (D / A) 20, which separates a subcode signal composed of data indicating reproduction time, address data indicating the order of data, and the like, and converts each digital signal into an analog signal.
The digital / digital converter (D / D) 10 for converting a digital signal of a CD into a digital signal corresponding to the MD and an output to the microcomputer 1 are constituted by a logic circuit or the like. The CD reproduction processing unit 7 outputs a focus control signal and a tracking control signal for controlling focus and tracking of the optical pickup 6 to the drive unit 9 according to a signal from the optical pickup 6, and a music selection signal from the microcomputer 1. A music selection control signal for controlling the reading position of the signal of the CD is output to the drive unit 9 based on the above. The CD reproduction processing unit 7 detects a skip or the like from the discontinuity of the subcode signal, and outputs the result to the microcomputer 1. That is, when skipping occurs, the reproduction time data and the address data, which are normally continuous values, have discontinuous values. By detecting the discontinuity of this value, signal abnormalities such as skipping are detected.

The drive section 9 outputs a drive signal to each actuator and motor of the optical pickup 6 in accordance with a signal from the CD reproduction processing section 7, and controls a drive current value to the actuator and motor and its polarity. And the like. And D / A
The converter 20 converts the digital audio signal from the CD reproduction processing unit 7 into an analog signal and outputs the analog signal to the changeover switch 3. The D / D converter 10 converts the CD digital signal into an MD.
It converts a digital signal corresponding to the MD into a digital signal corresponding to the MD, and converts the sampling clock, the number of quantization bits, and the like into a signal corresponding to the MD, and outputs the converted signal to the MD recording processing unit 11.

The optical pickup 13 irradiates the MD with a laser beam, receives the reflected light, reads the digital signal recorded on the MD, and outputs the digital signal to the MD reproduction processing unit 14.
A signal from the MD recording processing unit 11 is written into the MD, and includes a laser diode for irradiating laser light, an optical system such as a lens and a reflecting mirror, a light receiving element for receiving reflected laser light, and a magnet for focus control. Focus actuator consisting of a coil, tracking actuator consisting of a magnet for tracking control and a coil, track feed (a light irradiator is sent to a part where a predetermined music is recorded)
And the like.

The MD reproduction processing unit 14 includes the optical pickup 1
The digital signal is read from the signal read in step 3 and the audio signal (digital) and the MD playback / recording position (the number of the song being played / recorded, the playback / recording time from the beginning of the disc and from the beginning of the song, the data A digital-to-analog converter (D / A) 17 for converting a digital signal into an analog signal, an MD recording processing unit 11 and a microcomputer 1 And includes a logic circuit and the like. Further, the MD reproduction processing unit 14 outputs a focus control signal and a tracking control signal for controlling focus and tracking of the optical pickup 13 to a driving unit 15 by a signal from the optical pickup 13,
Also, a music selection control signal for controlling the reading position of the MD signal based on a music selection signal or the like from the microcomputer 1 is output to the drive unit 15. The MD reproduction processing unit 14 detects a skipping sound (at the time of reproduction and recording) from the discontinuity of the subcode signal, and outputs the result to the microcomputer 1. That is, when skipping occurs, the reproduction time data and the address data, which are normally continuous values, have discontinuous values. By detecting the discontinuity of this value, signal abnormalities such as skipping are detected.
Note that the MD playback processing unit 14 not only plays back MDs,
At the time of MD recording, the recorded signal is read and the same processing as above is performed.

The MD reproduction processing unit 14 has a memory (R
AM) 21 is connected, and a signal to be reproduced from the optical pickup 13 is pre-stored in the memory 21 in advance, and then the data to be reproduced is sequentially read out from the memory 21 to read out the data from the D / A converter 17. Output. Then, the MD reproduction processing unit 14 controls the optical pickup 1
If there is an abnormality in the signal input from the control unit 3, the drive unit 15 and the like are controlled to read the MD signal again to correct the data in the memory 21.

The MD recording processing unit 11 performs various controls in recording on the MD, and includes a logic circuit and the like. The main operation of the MD recording processing unit 11 is A /
A signal for writing data to the MD according to the digital data from the D converter 18 and the digital data from the D / D converter 10 is output to the optical pickup 13. In addition to outputting a digital signal and a sub-code signal), it performs a process of generating a write signal and controls the driving unit 15 in accordance with a signal from the MD reproduction processing unit 14 (a sub-code signal read from the MD). Further, a memory (RAM) 12 is connected to the MD recording processing unit 11, and a signal to be recorded is pre-stored in the memory 12 in advance, and thereafter, data to be recorded is sequentially read out from the memory 12. The signal is output to the optical pickup 13. Then, the MD recording processing unit 11 includes an A / D converter 18
If there is an abnormality in the signal output from the microcomputer 1, the microcomputer 1 outputs a command signal for controlling to read the CD signal having the abnormality again and to output the signal to the MD recording processing unit 11, and then the A
A process of correcting data in the memory 12 based on a signal output from the / D converter 18 is performed. MD playback processing unit 1
If an abnormality in the signal recorded on the MD is detected in step 4,
In response to the detection signal, the corresponding data is read out again from the memory 12 and a signal for performing rewriting to the optical pickup 13 is output. If the data cannot be corrected using the memory 12 (for example, if there is an error in rewriting data to the MD, or there is also an error in rereading data from the CD, etc.), a signal indicating a recording error is sent to the microcomputer 1. Output.

The drive section 15 outputs a drive signal to each actuator and motor of the optical pickup 13 in accordance with signals from the MD reproduction processing section 14 and the MD recording processing section 11, and a drive current to the actuator and motor is provided. It is configured to include a power transistor for controlling a value and its polarity. The D / A converter 17 converts a digital audio signal from the MD reproduction processing unit 14 into an analog signal and outputs the analog signal to the changeover switch 3.

The changeover switch 3 selectively outputs an audio signal from a radio, an audio signal from a CD player, and an audio signal from an MD player to the amplifier circuit 4 in accordance with a selection control signal from the microcomputer 1. It is configured to include transistors and relays. Then, the amplifier circuit 4 amplifies the signal from the changeover switch 3 and outputs the amplified signal to the speaker 5, and the speaker 5 outputs sound. Also,
The microcomputer 1 is connected to a vibration sensor 22 that detects vibration of the vehicle.

Next, the processing performed by the microcomputer 1 will be described. FIG. 2 is a flowchart showing the processing performed by the microcomputer 1. In step S1, it is determined whether or not a recording state has been made based on whether or not a recording operation has been performed by the operation unit 19.
If it is in the recording state, the process proceeds to step S2, and if it is not in the recording state, the process ends. In step S2, it is determined whether the recording is from a CD or a radio broadcast.
If the recording is from D, the process proceeds to step S3, and if the recording is from a radio broadcast, the process proceeds to step S5. Step S3
Then, the circuit is switched to perform recording from a CD, that is, a control signal is output to a CD player so as to output a signal to an MD recorder, and an MD signal is output to a radio receiving unit 2.
Output a control signal so that no signal is output to the recorder,
Move to step S4. Then, in step S4, a CD recording process described later is performed, and the process ends. In step S5,
The circuit is switched to perform recording from a radio broadcast, that is, a control signal is output to a CD player so as not to output a signal to an MD recorder, and an M signal is output to a radio receiving unit 2.
Output a control signal to output a signal to the D recorder,
Move to step S6. Then, in step S6, a radio recording process described later is performed, and the process ends.

Next, the radio recording process (step S6) will be described. FIG. 3 is a flowchart showing a radio recording process performed by the microcomputer 1. In step R1, MD
Update the track number (corresponding to the song number) to the next number after the maximum number already recorded on the MD, or to the lowest number among the empty numbers if there is an empty number (recording corresponding to that track number) Is performed), and the routine goes to Step R2.

In step R2, it is determined whether or not the reception is in a bad state based on a signal from the radio receiving unit 2. If the reception is in a bad state, the process proceeds to step R8. If the reception is in a good condition, the process proceeds to step R3. In step R3, it is determined whether or not an abnormality such as skipping has occurred in the recording signal. If the signal abnormality has occurred, the process proceeds to step R6. If the signal abnormality has not occurred, the process proceeds to step R4. The detection of the occurrence of the signal abnormality is performed by detecting a high frequency component noise by filtering an audio output signal from the radio receiving unit 2 with a filter having predetermined characteristics, detecting a pulse noise,
Short-time silence generation detection or MD playback processing unit 14
The detection is performed by detecting discontinuity data such as address data in. In step R4, it is determined whether or not the vibration is large based on the output from the vibration sensor 22. If the vibration is large, the process proceeds to step R6. If the vibration is not large, the process proceeds to step R5. In step R5, it is determined whether or not the recording has been completed based on whether or not a recording completion operation has been performed by the operation unit 19. If not, the process returns to step R2.
If the recording is completed, the process ends.

In step R6, it is determined whether or not data correction using the memory 12 is possible. If it is correctable, the process proceeds to step R7. If not, the process proceeds to step R8. In step R7, rewriting processing of abnormal data is performed using the data stored in the memory 12, and the process proceeds to step R2. In step R8, the new track number updated in step R1 is erased to return to the state before recording, that is, the next recording is performed on the track number from the beginning (the beginning of the song), and the process ends.

Next, the MD recording process (step S4) will be described. FIG. 4 is a flowchart showing the MD recording process performed by the microcomputer 1. In step M1, the MD track number (corresponding to the song number) is updated to the next number after the maximum number already recorded on the MD, or to the smallest number among the empty numbers if there is an empty number (that track number). The recording is performed in accordance with (1), and the process proceeds to step M2.

In step M2, it is determined whether or not the vibration is large from the output of the vibration sensor 22. If the vibration is large, the process proceeds to step M7.
Move to 3. In step M3, it is determined whether or not an abnormality such as skipping has occurred in the audio signal from the CD player. If a signal abnormality has occurred, the process proceeds to step M7. If no signal abnormality has occurred, the process proceeds to step M4. . Step M4
Then, it is determined whether or not an abnormality such as skipping has occurred in the recording signal recorded on the MD. If a signal abnormality has occurred, the process proceeds to step M7. If no signal abnormality has occurred, the process proceeds to step M5. The detection of the occurrence of the signal abnormality is performed by detecting discontinuity data such as address data of an input signal from a CD player in the MD recording processing unit 11 or a read signal from the MD in the MD reproduction processing unit 14. . In step M5, one track, that is, one track
Whether or not the recording of the music has been completed is determined from the change in the track number data of the subcode and the remaining time of the corresponding track. If completed, the process proceeds to step M6, and if not completed, the process returns to step M2. In step M6, it is determined whether or not all recording has been completed by determining whether or not a recording completion operation has been performed by the operation unit 19, or whether or not recording of all the tracks designated for recording has been completed. If not, the process returns to step M1. If the recording is completed, the process ends.

In step M7, it is determined whether data correction using the data stored in the memory 12 is possible.
If it is correctable, the process proceeds to step M8. If it is not correctable, the process proceeds to step M9. In step M8, a process of re-reading data from the CD player into the memory 12 and a process of re-writing abnormal data using the data in the memory 12 are performed, and the process proceeds to step M5. In step M9, it is determined whether the mode set on the operation unit 19 is a disk mode for invalidating the entire recording in the event of an abnormality, or a track mode for invalidating only the abnormal track (song). If the mode is the mode, the process proceeds to step M10. If the mode is the disk mode, the process proceeds to step M11. In step M10, the new track number updated in step M1 is erased to make the state of the abnormal track (song) before recording, that is, the next recording starts from the beginning (song start) for the track number. The process proceeds to Step M6. Further, in step M11, all the track numbers set after the new track number updated in step M1 are erased to be in a state before recording, that is, the next recording is performed again from the beginning assuming that there is no recording. Thus, the process is completed.

As described above, according to the present embodiment, when there is an abnormality in the recording signal, the operation is performed so that a normal recording is performed by the data correction processing, and if the data correction processing is impossible, the mode is set. Accordingly, the entire recording or the recording of the track where the abnormality is detected is invalidated, and the next recording is started from the beginning of the invalidated music (track). In addition, in a violent vibration state in which a recording abnormality is likely to occur, the operation is the same as that when a signal abnormality is detected. Therefore, it is possible to prevent the recording state from being poor and difficult to hear.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a recording device according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a process performed by a microcomputer.

FIG. 3 is a flowchart showing a radio recording process performed by a microcomputer.

FIG. 4 is a flowchart showing an MD recording process performed by a microcomputer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Microcomputer (microcomputer) 2 Radio receiving part 7 CD reproduction processing part 11 MD recording processing part 12 Memory 22 Vibration sensor

Claims (8)

[Claims] 1. A recording apparatus for recording sound on a disk by a digital signal, comprising: an abnormality detecting means for detecting an abnormality in the recording signal; and a recording means for stopping the recording when the abnormality detecting means detects an abnormality in the recording signal. A recording apparatus comprising: a stopping means; and a recording position returning means for returning a recording start position after the recording is stopped by the recording stopping means to a position before the recording. 2. A recording apparatus for recording a voice on a disk by a digital signal, comprising: a tune head detecting means for detecting a tune head which is a start portion of a tune to be recorded; Song head recording position storage means for storing the recording position; abnormality detection means for detecting an abnormality in the recording signal; and when the abnormality detection means detects an abnormality in the recording signal, recording of the music in which the abnormality is detected is performed. A recording stop means for stopping, and a recording start position after the recording is stopped by the recording stop means is returned to a recording start position of the music in which the abnormality of the recording signal stored in the song head recording position storage means is detected. A recording device comprising: a recording position return unit. 3. The recording apparatus according to claim 1, wherein said abnormality detecting means detects an abnormality from skipping of a digital signal to be recorded. 4. The recording apparatus according to claim 1, wherein said abnormality detecting means detects an abnormality from a skip of a recorded digital signal. 5. The recording apparatus according to claim 1, wherein said abnormality detecting means detects an abnormality from a received radio wave state of a radio broadcast to be recorded. 6. The recording apparatus according to claim 1, wherein the abnormality detecting means detects an abnormality from a vibration state of the recording apparatus. 7. A signal storage means for storing a signal to be recorded as a digital signal, a recording means for recording the signal stored in the signal storage means on the disk, and recording when an abnormality is detected in the signal to be recorded. Re-reading a signal to be recorded and storing the signal in the signal storage means, wherein the abnormality detection means detects an abnormality in the recording signal when the recording signal cannot be corrected by the re-storage means. 3. The method according to claim 1, wherein
The recording device described. 8. A signal storage means for storing a signal to be recorded as a digital signal, a recording means for recording a signal stored in the signal storage means on the disk, and when an abnormality is detected in the recorded signal, Re-recording means for re-recording the signal stored in the signal storage means on the disk, wherein the abnormality detecting means detects an abnormality in the recorded signal when the re-recording means failed to correct the recorded signal. 3. The method according to claim 1, wherein
The recording device described.