JPH0337868A - Dubbing system - Google Patents

Abstract

PURPOSE:To perform re-recording appropriately by performing retrieval in a short time by setting a recording level at an appropriate level corresponding to the recording level retrieved by a fast reproducing operation at every item of audio signal to be re-recorded. CONSTITUTION:A CD is loaded on a CD player 21, on the other hand, a cassette tape is loaded on the cassette mechanism part 43 of a cassette tape recorder 22. When an operation to activate a recording level retrieval switch 31 is performed, a microcomputer 29 starts the control of a recording level retrieval operation, and fast search from the inner periphery to the outer periphery of the CD in the CD player 21 is started with the above operation. A read audio signal is sent to a signal processing circuit 27, and is reproduced as an analog signal (a). A level judging circuit 32 judges the level of reproducing sound, and the recording level of each music is decided, and it is transmitted to the microcomputer 29 sequentially as a recording level information signal (c).

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to, for example, compact discs (Co
tDisk, hereinafter abbreviated as CD. This invention relates to a dubbing system for re-recording an audio signal recorded on a recording medium such as 〉 to another recording medium such as a cassette tape.

BACKGROUND OF THE INVENTION FIG. 3 is a block diagram showing an example of a conventional dubbing system. This dubbing system 3 is composed of a CD player 1 and a cassette tape recorder 2,
The CD player 1 includes an optical big atsulator 3, a servo circuit 4, a drive circuit 5, a mechanical system 6, a signal processing circuit 7, and a digital-to-analog converter (hereinafter abbreviated as a D/A converter).

) 8, a microcomputer 9, a playback switch 10, etc., and the cassette tape recorder 2 includes a recording circuit 11.
, j & sound ho'J Neem 12, Cassette 1-IRv1
13, a recording switch 14, and the like.

The optical pickup 3 has a function of reading audio signals recorded as digital signals on a CD, and is controlled by a servo circuit 4. The audio signal read by the optical pickup 3 is sent from the servo circuit 4 to the D/A converter 8 via the signal processing circuit 7, where it is converted into an analog signal.

The drive circuit 5 includes an optical pickup/focus actuator, an optical pickup/tracking actuator,
Mechanisms such as a slide motor (a drive source for moving the optical big roller 13 from the inner circumferential side of the CD to the outer circumferential side and from the outer circumferential side to the inner circumferential side), a spin motor (a driving source for rotating the CD), etc. This is a circuit for driving the system 6, and this circuit is also controlled by the servo circuit 4.

The microcomputer 9 has a function of controlling the servo circuit 4, the signal processing circuit 7, the recording circuit 11, and the like.

The re-recording operation using the dubbing system described above is performed by the following procedure.

First, the cassette mechanism section 13 of the cassette tape recorder 2
Attach the cassette tape to 0, then set the recording volume to 1.
2, and set the recording switch 14 provided in the recording circuit 11 to the recording state.

With the cassette tape recorder 2 in the above setting state, connect it to the microcomputer 9 of the CD7 layer 1.
When the playback switch 10 is turned on, the microcomputer 9 sends a cooperation signal to the recording port 111 for coordinating the CD grayer 1 and the cassette tape recorder 2, and as a result, the cassette mechanism 13 is started. A synchronizing signal is output from the recording circuit 11, while the CD
The player 1 starts playing back the audio signal recorded on the CD. The audio signal played by the CD player 1 is sent to the recording circuit 11 as an analog signal 2.
The audio signal is then sent to the cassette mechanism section 13, and the audio signal is re-recorded onto the cassette tape at an appropriate recording level set in advance by the recording volume 12.

Problems to be Solved by the Invention However, in the above-mentioned conventional dubbing system, even when multiple items of audio signals are recorded on a CD and the recording level of each item is different from each other, it is difficult to record the audio signals on the CD. The audio signals of all the items in the cassette tape will be re-recorded on the cassette tape under various recording level conditions. As a result, if the audio signal of an item was recorded on a CD at a low recording level, when it is re-recorded on a cassette tape and played back,
On the other hand, in the case of an audio signal from an item that was recorded on a CD at a high recording level, when re-recorded on a cassette tape and played back, the reproduced sound becomes too loud and distorts. There was a problem that this occurred.

Therefore, it is an object of the present invention to perform re-recording of an audio signal from a first recording medium to a second recording medium.
To provide a dubbing system which can extremely easily re-record an audio signal at an appropriate recording level without making the reproduced sound too low or causing distortion.

Means for Solving the Problems The present invention is directed to a dubbing system that sequentially re-records one or several items of audio signals recorded on a first recording medium onto a second recording medium. a recording level search means for searching the recording level of the audio signal recorded on the first recording medium for each item by high-speed playback operation; The dubbing system is characterized in that it further comprises a recording level setting means for switching and setting an appropriate level according to the recording level searched by the recording level searching means.

Effect According to the present invention, prior to re-recording the audio signal recorded on the first recording medium to the second recording medium, the audio signal recorded on the first recording medium is
The recording level of the audio signal recorded on the recording medium is automatically searched for each item by high-speed playback operation. The recording level when the audio signal is re-recorded on the second recording medium is set to an appropriate level according to the recording level searched earlier for each item of the audio signal, that is, the recording level searched earlier is higher. P! b has a lower level accordingly, and J1, which has a lower recording level that was searched earlier.
The percentage meetings are set to higher levels accordingly. As a result, the reproduced sound of the audio signal re-recorded on the second recording medium has an appropriate volume regardless of the item, and is not too low or distorted.

Embodiment FIG. 1 is a block diagram showing a schematic configuration of a dubbing system which is an embodiment of the present invention.

This dubbing system is composed of a CD player 21 and a cassette tape recorder 22. , microcomputer 29, playback switch 3
0, recording level search switch 31, level judgment circuit 32
and an external clock generator 33 connected to a signal processing circuit 27, and the cassette chip 1 recorder 22 includes a recording circuit 41, a recording volume 42, and a cassette mechanism section 4.
3. It includes a recording switch 44 and the like.

The optical pickup 23, servo circuit 2 side 1, and v1 function of the playback switch 30 in the CD player 21 are the same as in the conventional example.

That is, the optical pickup 23 has a function of reading an audio signal recorded as a digital signal on a CD, and its control is performed by a servo circuit 24. The audio signal read by the optical pickup 23 is sent to the servo circuit 2.
4, the signal is sent to the D/A converter 28 via the signal processing circuit 27, where it is converted into an analog signal. The drive circuit 25 includes an optical pickup/focus actuator,
This is a circuit for driving a mechanical system 26 such as an optical pickup/tracking actuator, a slide motor, a spin motor, etc., and this circuit is also controlled by the servo circuit 24 described above.

The microcomputer 29 has the function of controlling the servo circuit 24, signal processing circuit 27, recording circuit 41, etc. to perform the same operations as in the conventional example, and also doubles the recording level of the audio signal recorded on the CD. It also has a function of controlling the setting of the recording volume 42 when re-recording onto a cassette tape, depending on the search operation in the playback mode and the searched recording level.

The recording level search switch 31 is a switch for inputting a command to the microcomputer 29 to start the above-mentioned recording level search operation, and at the same time, it instructs the signal processing circuit 27 to start normal operation. It also has the ability to give commands to operate at twice the speed. The level determination circuit 32 is a circuit for determining the level of the reproduced audio signal converted into an analog signal a by the D/A converter 28 read from the CD, and the determination result by this circuit is sent to the microcomputer 29. It will be done.

FIG. 2 is a schematic diagram showing the recording level search operation in the CD player 21. Referring to FIG. 2, the procedure of the re-recording operation by the dubbing system will be described below.

First, a CD is loaded into the CD player 21, and a cassette tape is also loaded into the cassette mechanism section 43 of the cassette tape recorder 22.

next,#! When the sound level search switch 31 is turned on, a start signal for a recording level search operation is input to the microcomputer 29.

Upon input of the start signal, the microcomputer 29 starts controlling the recording level search operation, whereby the CD player 21 starts a high-speed search from the inner circumference to the outer circumference of the CD.

That is, from the microcomputer 29 to the servo circuit 2
4 is commanded to control the double speed operation, and at this time, the recording level search switch 31 also sends a command to the signal processing circuit 27.
A double speed signal e is transmitted which doubles the clock frequency of the external clock generator 33 as in normal playback operation. Note that during this recording level search operation, the recording circuit 41 and the cassette mechanism section 43 on the cassette team 1 recorder 22 side are not in recording mode.
It has not started working.

The above-mentioned high-speed search is performed by reading the audio signals recorded as digital signals on the tracks of the CD with the optical pickup 23 while jumping every few tracks, and the read audio signals are sent to the servo circuit 23.
, and is sent to the D/A converter 28 via the signal processing circuit 27, where it is reproduced as an analog signal a. The level of this playback sound corresponds to the recording level of a CD, and the level of the playback sound is determined by the level determination circuit 32, and when the playback sound is re-recorded on a cassette tape based on the determination result. The recording level is determined. The determined recording level is transmitted to the microcomputer 29 as a recording level information signal C.

Now, assuming that six songs of music are recorded on a CD as audio signals, song number 1 is recorded as shown in Figure 2.
From the recording area of song number 6 to the recording area of song number 6,
Substantial read operation by optical pickup 23 at twice the speed of normal playback operation (required time 50 rns e
c) and track jump movement <required time 3 rn
s e c ) are repeated alternately, thereby determining the recording level for each song and producing the recording level information signal C.
The data are sequentially transmitted to the microcomputer 29 as follows. In FIG. 2, the section during the reading operation is indicated by 0, the section during the track jump is indicated by ``■'', and the number of times each operation is performed is indicated by ``■'' to ``■''. In this case, when the high-speed search is performed to the outermost track of the CD, the section that requires 5 seconds to read in normal playback operation is set as the track section to be skipped in one track jump, that is, the section that takes 5 seconds to read in normal playback operation is set. When the recording level information signal C is sent to the microcomputer 29 and these signals C are stored in the microcomputer 29 in association with each song number, the optical pickup 23 picks up the songs from the outermost circumference of the CD. Move to the beginning of the recording area for song number 1 and wait.

When the standby operation of the optical pickup 23 is completed, the recording level setting control signal d is sent from the microcomputer 29 to the recording volume 42, and the recording volume is adjusted to the recording level corresponding to the number 1 stored in the two microcomputers. 42 is automatically set.

Before and after setting the recording level described above, the microcomputer 29 sends a message to the recording circuit 41 from the CD player 21.
As a result, a synchronization signal for starting the cassette mechanism section 43 is output from the recording circuit 41, and the recording switch 44 is turned on. The cassette tape recorder 22 is set to a recording state.

When all the above settings are completed, the microcomputer 2
9, the playback switch 30 is turned on, and the CD player 21 starts playing the CD at the normal playback speed. The data is re-recorded by the cassette tape recorder 22 at the recording level set at .

When the CD player 21 finishes playing song number 1 on the CD and the optical pickup 23 reaches the beginning of the recording area for the next song number 2, the recording volume 42 is set to song number 2.
A recording level setting control signal d is sent from the microcomputer 29 to the recording volume 42 to set the recording level corresponding to The recording is then re-recorded onto a cassette tape under appropriate recording level conditions.

In this way, for multiple songs after song number 3,
The songs stored in the microcomputer 29 in advance are sequentially re-recorded onto the cassette tape at a recording level appropriate for the songs.

In this dubbing system, as mentioned above, the recording level search operation is performed at speed 2 (A) of the normal playback operation, so the search can be completed in a short time. If the search is performed at a playback speed of

In other words, when performing a recording level search operation at normal playback speed, the time required for track jump is the same as at double speed, but the time required for the actual reading operation is the same as at double speed. Twice as much as P4ki, or 100m5e
c. Therefore, the total time of the 6 songs added to Fig. 2 is 315 rn s e
On the other hand, when using the normal playback speed, the total time for the six songs of the same machine as shown in Figure 2 increases by twice the reading operation time, and becomes 6151TI S e c.
becomes. ') Compared to the normal playback speed, the time required for the recording level search operation at double speed is 51-
This will be reduced to 2%.

Effects of the Invention As described above, according to the dubbing system of the present invention, the audio signal recorded on the first recording medium is recorded on the first recording medium before being re-recorded on the second recording medium. The recording level of the audio signal that has been searched for is automatically searched for each item, and the recording level when re-recording the audio signal on the second recording medium is set to the recording level that was previously searched for each item of the audio signal. Since the configuration is such that the playback sound of the audio signal re-recorded on the second recording medium will be at the appropriate volume regardless of the item, it will not be too quiet or distorted. The re-recording operation can be performed extremely easily even if a problem occurs. In particular, since the recording level search is performed faster than the normal playback operation, the search can be performed in a short time.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the configuration of a dubbing system that is an embodiment of the present invention, Fig. 2 is a schematic diagram showing the recording level search operation by the dubbing system, and Fig. 3 shows the configuration of a conventional dubbing system. It is a block diagram. 21... CD player, 22... Cassette tape recorder, 23... Optical pickup, 24... Servo circuit, 25... Drive circuit, 26... Mechanism system, 27...
...Signal processing circuit, 28...D/A converter, 29
... Microcomputer, 30... Playback switch, 31... Recording level search switch, 32... Level judgment circuit, 33... External clock generator, 41...
・Recording circuit, 42...Recording volume, 43...Cassette mechanism section, 44...Recording switch

Claims (1)

[Claims] In a dubbing system that sequentially re-records one or more items of audio signals recorded on a first recording medium onto a second recording medium, the audio signals recorded on the first recording medium prior to re-recording. A recording level search means for searching the recording level of each item by high-speed playback operation, and a recording level at the time of re-recording according to the recording level searched by the recording level search means for each item of the audio signal to be re-recorded. A dubbing system comprising a recording level setting means for switching and setting an appropriate level.