JPH09167433A - Recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely detect an intermusic part by highly speedily detecting a level of a signal recorded on a recording medium and monitorially reproducing at low speed when the signal level is lowered below a prescribed level. SOLUTION: When it is detected by a comparator 8 that an audio signal to be reproduced becomes below the prescribed level, a servo driving part 2 is controlled by a system control part 5, and the recording medium is driven at half the speed, while a switch 10 is turned on to output a monitor signal from an output terminal 9. The servo driving part 2 is controlled with the system control part 5 by key operation from an operating part 11, so that an intermusic part recorded on the recording medium is detected, and a start ID is recorded at a head of music, and then this program searching mode is finished.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus for a recording medium on which a digital signal is recorded.

[0002]

2. Description of the Related Art Conventionally, in a reproducing apparatus such as a CD (Compact Disc) player and a DAT (Digital Audio Tape) recorder, as shown in FIG. 4, in order to detect the beginning portion of a piece of music desired to be reproduced. The reproduction output is detected by changing the reproduction speed by multiplying the reproduction speed by several times or a fraction of the normal speed. In this case, in order to realize variable speed reproduction, the reproduction speed is generally controlled by changing the operation key pressing method, operation key type, and pressing length, or the speed is changed midway. The nth music piece is fast-forwarded in the direction of arrow B at a variable speed, passes through the end position, enters the space between the music pieces, and further passes the head of the n + 1th music piece, and is rewound at a variable speed in the direction indicated by arrow C to the position of arrow A. It returned to and decided the beginning of the start position of the n + 1th song.

[0003]

DISCLOSURE OF THE INVENTION CD player, DAT
In a reproducing device such as a recorder, when detecting the beginning of a music piece to be reproduced, a change point at which the music number generally changes is detected as the desired beginning of the music, and the mark ( For example, the position where the digital audio tape recorder's start ID, end ID, etc. are recorded may be the beginning of the song (the beginning of the song) or the tail (the end of the song) within the range between the songs. In many cases, it is difficult to precisely detect a desired position in the conventional method of simply changing the reproduction speed to set the position.

[0004]

According to the present invention, in an apparatus for recording / reproducing a digital signal on / from a recording medium, a means for reproducing the recording medium at high speed or at low speed and DA conversion of the reproduced signal to obtain a signal level. When the level is higher than a predetermined level, high-speed reproduction is performed, and when the level of the signal is lower than the predetermined level, low-speed reproduction is performed and monitor output is performed, and the end position of one recorded signal and the next recorded one The recording / reproducing apparatus is provided with a means for recording a signal indicating a start position of the next block of signal between the signal and the signal.

The present invention also relates to a device for recording / reproducing a digital signal on / from a recording medium, a means for reproducing the recording medium at high speed or at low speed, and a DA signal obtained by temporarily storing the reproduced signal in a buffer memory. Means for performing high-speed reproduction when the level of is above a predetermined level, and low-speed reproduction when the level of the signal is below a predetermined level, and monitor output,
Means for reading a signal from the buffer memory, DA converting it, and outputting it for monitoring, means for giving an operation command for repeating the monitor output, means for setting the start position of the next block of signals, and means for setting the set start position. A recording / reproducing apparatus comprising means for recording a signal on the recording medium.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a reproducing apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a reproducing apparatus according to the present invention, and FIG. 2 is a flow chart showing an embodiment of the operation of the recording / reproducing apparatus of the present invention. FIG. 3 is a waveform diagram for explaining the operation of the recording / reproducing apparatus of the present invention, which will be described below in comparison with the waveform diagram showing the conventional operation of FIG.

The recording medium faces the head 1 and is driven by the servo drive unit 2 to obtain a reproduction signal from the head 1.
The signal reproduced by the head 1 is amplified by the RF amplifier 3, and the signal processing unit 4 performs code correction, signal synchronization processing, temporary storage in the buffer memory 6, etc. by the microcomputer control of the system control unit 5, and is temporarily stored. The digital signal is DA-converted by the DA converter 7 via the signal processor 4, and the audio signal output is output through the switch 10 to the output terminal 9
To monitor output.

The DA-converted audio signal is monitored by the comparator 8, and the output level is a predetermined level (-
40 dB) or more is detected (S1), and if the system control unit 5 is above a predetermined level, the switch 1
0 is turned off, the monitor output of the output terminal 9 is turned off, and the servo drive unit controls the recording medium at the triple speed drive operation (B and C in FIG. 3) until the reproduced audio signal falls below a predetermined level (see FIG. 3). B ', C') are driven (S2).

When it is detected by the comparator 8 that the reproduced audio signal is below the predetermined level, the system controller 5 causes the servo driver 2 to operate.
Control the recording medium to drive the recording medium at a half speed (B'-C 'in FIG. 3).
At the same time, the switch 10 is turned on and the monitor signal is output from the output terminal 9 (S3).

The servo drive unit 2 by the system control unit 5 is controlled by the key operation from the operation unit 11 to detect the space between the music pieces recorded on the recording medium, and the music head (the music head A in FIG. 3) is detected. The start ID is recorded and the cue mode is ended (S4).

When the start ID is added, the digital signal stored in the buffer memory 6 is repeatedly read from the operation unit 11 from a predetermined position in order to search between the songs DA.
The conversion unit 7 converts the analog signal, obtains the monitor output from the output terminal 9, repeatedly searches and sets the position to which the start ID should be attached, and sets the system control unit 5 based on the instruction from the operation unit 11. The servo drive unit 2 drives the signal position, which is left in the buffer memory, to which the start ID is to be attached, at a half speed to search the music head (A in FIG. 3) and records the start ID of the music head signal set. Then, the editing operation can be ended (S5).

If the music recorded at a level lower than a predetermined level is reproduced at a low speed, the buffer memory 6
The portion corresponding to a predetermined level or less of the signal once stored is repeatedly reproduced, the position at which the buffer memory 6 is read is shifted to the beginning of the music piece by the operation of the operation unit 11, and the monitor reproduction is performed to accurately start the beginning of the music piece. The position where the signal is recorded can be set, and the system control unit 5 can record the designation signal for starting the reproduction of the music at a predetermined position of the recording medium while comparing with the reproduced signal.

[0013]

According to the present invention, the level of a signal recorded on a recording medium can be detected at high speed, and when the signal level falls below a predetermined level, monitor reproduction can be performed at low speed to reliably detect a track interval. , It is possible to easily specify the reproduction start position.

[Brief description of the drawings]

FIG. 1 is a block diagram of a recording / reproducing apparatus according to the present invention.

FIG. 2 is a flowchart showing an embodiment of recording / reproducing operation of the present invention.

FIG. 3 is a waveform diagram for explaining the operation of the recording / reproducing apparatus of the present invention.

FIG. 4 is a waveform chart showing the operation of a conventional recording / reproducing apparatus.

[Explanation of symbols]

 1 Head 2 Servo Drive Section 3 RF Amplifier 4 Signal Processing Section 5 System Control Section 6 Buffer Memory 7 DA Conversion Section 8 Comparator 9 Output Terminal 10 Switch 11 Operation Section

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Claims (2)

[Claims] 1. An apparatus for recording / reproducing a digital signal on a recording medium, means for reproducing the recording medium at high speed or low speed, and high speed when the reproduced signal is DA converted and the signal level is equal to or higher than a predetermined level. Between the end point of the recorded one block of signal and the next recorded one block of signal, the control means for reproducing at low speed when the level of the signal is below a predetermined level and outputting a monitor output, A recording / reproducing apparatus comprising means for recording a signal indicating a start position of a block of signals. 2. An apparatus for recording / reproducing a digital signal on / from a recording medium, and means for reproducing the recording medium at a high speed or a low speed, and a reproduced signal being temporarily stored in a buffer memory and DA-converted to obtain a signal level. Means for high-speed reproduction when the level is above a predetermined level, low-speed reproduction when the level of the signal is below a predetermined level, and monitor output; and means for reading out the signal from the buffer memory, DA converting it, and outputting the monitor. Means for commanding the repetition of the monitor output, means for setting the start position of the next block of signals,
A recording / reproducing apparatus comprising means for recording the signal of the set start position on the recording medium.