JPH0697485B2 - Audio signal recording method - Google Patents

Description

TECHNICAL FIELD The present invention relates to an audio signal recording method.

BACKGROUND ART When dubbing music recorded on an audio signal recording medium such as a digital audio disk onto a magnetic tape,
A tape end may occur during the performance of a song, and the recording may suddenly be interrupted in the middle of the song, causing a so-called "break".

In order to avoid such a sudden "bend" condition, it is necessary to consider in advance that the recordable time of the tape is set to a length commensurate with the playing time of the recording medium. Is difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide an audio signal recording method capable of avoiding a sudden "bend" state at the tape end.

In order to achieve such an object, in the audio signal recording method according to the present invention, the tape end is output from the tape recorder from the tape recorder to the tape end after the head music signal of one music is issued from the recording medium playing means. When the signal is issued, the recording medium playing means is put in the paused state, while the first time from the time point of the first head music signal immediately before the tape end signal to the time point of the tape end signal is set to the length of the tape leader portion. When it is longer than the predetermined time, which is slightly longer than the corresponding time, the tape recorder is instructed to rewind by the tape length corresponding to the first time, and then the recording medium playing means starts from the beginning of the music corresponding to the first music signal. And at the same time the tape recorder is instructed to record, and the audio signal is gradually attenuated after the lapse of the difference between the first time and the predetermined time. When one hour is shorter than the above predetermined time, the tape recorder is instructed to rewound by the tape length corresponding to the second time from the music head signal immediately before the music head signal 1 to the tape end signal. On the other hand, at the same time as instructing to resume the performance from the beginning of the music corresponding to the beginning signal of the first music signal, the tape recorder is instructed to record, and the time difference between the second time and the above predetermined time elapses. Then, the audio signal is gradually attenuated.

EXAMPLES Examples of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an apparatus in which the method of this embodiment is executed. The disc player 1 as a recording medium playing means plays, for example, a compact disc as an audio signal recording medium. The tape recorder 2 is for recording and reproducing the audio signal from the disc player 1 on a tape. These are CPU3a, 3b, ROM4a, 4b respectively
And a RAM 5a, 5b. In the disc player 1, the CPU 3a reads the R according to a command from the operation unit 6a and the CPU 3b of the tape recorder 2.
The program stored in the OM4a is executed to store the necessary data in the RAM5a, while the mechanism control section 7a and the servo system 8 are operated. The mechanism control unit 7a includes, for example, an automatic disk loading mechanism. The servo system 8 is composed of a spindle servo circuit, a tangential servo circuit, a focus servo circuit, a tracking servo circuit, etc., and these servo circuits are operated by a command from the CPU 3a to rotate the disk 9 and pick up the disk 10.
Is controlled, and the audio signal recorded on the disc 9 is read by the pickup 10. The read audio signal is supplied to the recording signal processing system 12 of the tape recorder 2 via the signal reproducing system 11.

On the other hand, in the tape recorder 2, the CPU 3b reads the ROM based on the signals from the operation unit 6b and the CPU 3a of the disc player 1.
The program stored in 4b is executed to store the necessary data in RAM 5b, while the play (PLAY) and cue (CU
E), review (REV), fast forward (FF), rewind (REW)
The mechanism control unit 7b and the recording signal processing system 12 for controlling the sound recording system 12 are operated so that the audio signal input from the disc player 1 to the recording signal processing system 12 is taped (not shown) via the recording / reproducing head 13. Recorded in. In this way, the audio signal read from the disk 9 is recorded on the tape. The audio signal recorded on the tape can be read by the recording / playback head 13, and the read audio signal is detected by the music beginning detection circuit 14 to detect the beginning of the music, so that a desired audio signal is passed through the reproduction signal processing system 15. It is possible to reproduce at a proper time by the speaker 16. Further, the tape recorder 2 is provided with an erasing circuit 17 and an erasing head 18 so that the audio signal once recorded on the tape can be erased.

Next, the recording operation will be described. FIG. 2 is a flow chart of a control program that controls the recording operation of the CPU 3b of the tape recorder 2.

The subroutine program of FIG. 2 is the disc player 1.
It is repeatedly executed by the CPU 3b until the dubbing command given by the operation of the dubbing key provided on the operation unit 6a is released. When this subroutine starts, it is first determined whether or not a flag F described later is 2 (step 1). If F is not 2, then various conditions such as that the tape is properly mounted at a predetermined position are met. It is determined whether the start is possible (step 2). If the start is not possible, the program ends immediately. If it is determined in step 2 that the recording of the tape recorder 2 can be started, a recording start command is issued, the tape recorder 2 starts recording (step 3), and then a performance start command is issued.
It is supplied to the CPU 3a and the disc player 1 starts playing (step 4). The disc player 1 searches for a piece of music and plays it according to a preset order. Such a music selection performance operation of the disc player 1 is well known and will not be described in detail here. In this way, dubbing is started. Next, the arrival of the music head signal is determined (step 5). When it is determined in step 5 that the music beginning signal has arrived, the count value of the tape end processing timer at that time is set.
It is stored in the RAM 5b as T ₁ (step 6), the tape end processing timer is reset and initialized, and then counting is started (step 7), and the operation of step 5 is executed again. On the other hand, if it is determined in step 5 that it is not the beginning of the music, then it is determined whether or not the performance of the disc player 1 is completed (step 8). When it is determined in step 8 that the performance is completed, a recording stop command is issued to the tape recorder 2 (step 9). When a recording stop command is issued, the tape recorder 2 stops recording and the program ends. If it is determined in step 8 that the performance is being performed, it is next determined whether or not it is the tape end (step 10). Whether or not it is the tape end is determined by the presence or absence of a tape end signal emitted from the tape recorder 2 at the tape end. If it is determined in step 10 that the tape is not the tape end, the operation of step 5 is executed again. If the tape end is determined in step 10, the count value of the tape end processing counter at this time is set to T _2.
Store in RAM5b (step 11). Next, a pause command is issued (step 12) and a pause signal is supplied to the disc player 1. Upon receiving the pause command signal, the disc player 1 puts the pickup in the same position and pauses the performance. Next, the value T ₂ stored in the RAM 5b and the predetermined value To are compared in magnitude (step 13). Where To
The value of is a value stored in the RAM 5b which is predetermined according to the recording attenuation time which is set just before the tape leader section having the length of the tape leader section provided at the end of the tape.
If it is determined in step 13 that T ₂ is larger than To, the tape recorder 2 is instructed to rewind by the tape length corresponding to T ₂ (step 14), and then the disc player 1 is played the last song. A head search command is issued (step 15). When the search and rewind are completed, the disc player 1 and the tape recorder 2 send search completion signals.
Supplied to CPU3b. When the search and rewind are complete,
Next, a recording start command is issued (step 16), then a performance start command is issued (step 17), and the performance and recording from the beginning of the last song are resumed. Further, after the timer t is reset, the timer count is started (step 1
8) Continue time counting while monitoring whether the timer t and T ₂ -To are equal in size (step 19). When it is determined in step 19 that t = T ₂ −To, the gain value G is then reduced by a predetermined value g (step 20), then it is determined whether or not it is the tape end (step 21), and the tape end is determined. Unless it arrives, such an operation is repeated and the value of G is gradually reduced. Here, the value of the gain value G indicates the set gain supplied to the variable gain amplifier (not shown) in the recording signal processing system 12, and the audio signal recorded on the tape by gradually decreasing the value of G. Is gradually attenuated. The value of the predetermined value g is set so that the value of G becomes 0 and the recording level becomes 0 immediately before the arrival of the tape reader unit.

The same effect can be obtained by reducing the set gain of the variable gain amplifier in the signal reproducing system 11 of the disc player by the attenuation command of the tape recorder 2.

On the other hand, if it is determined in step 13 that T ₂ is smaller than To, the tape recorder 2 is instructed to rewind by the tape length corresponding to the sum of T ₁ and T ₂ (step 22), and then the disk is rewound. The player 1 is instructed to search for the beginning of the last song (step 23). When the search and rewind are completed, a recording start command is issued next (step 2
4) Then, a performance start command is issued (step 2)
Five). Further, to start the time count after resetting the timer t (step 26), and monitors whether or not the size of the timer t and T ₁ + T ₂ -To equal to continue the time count while (step 27). In step 27, t = T ₁ + T ₂
If it is determined to be -To, the gain value G is reduced by a predetermined value g (step 28), and then it is determined whether or not it is the tape end (step 29). Next, when it is determined at step 21 or step 29 that the tape end is reached, the gain value G is initialized to Go (step 30), and then it is determined whether the flag F having an initial value 0 is 1 ( Step 3
1) If it is determined that the flag F is 0, the rotation direction of the tape recorder 2 is reversed (step 32), and then the head search command of the previously searched music is issued to the disc player 1 (step 33). ), Then the flag F is set to 1 and the program ends (step 34). On the other hand, if it is determined in step 31 that the flag F is 1, it means that the recording has already been performed on both sides, and the process is ended with F = 2 (step 35).

FIG. 3 and FIG. 4 are views showing the processing method at the time of "bending" in the tape end portion according to the method of this embodiment, divided into two cases. According to the method of the present embodiment, when the tape end arrives during the performance of the music piece and the music piece is “cut out” (the third piece).
(Fig. A and Fig. 4A), after the tape and pickup have been returned to the beginning of the song that has become "cut out", recording is restarted from there and gradually attenuated from the specified part immediately before the tape end leader part. The recorded audio signal is recorded (FIGS. 3B and 4B), and after the tape is inverted, the music piece “cut out” is recorded again from the beginning of the music piece (FIG. 3B).
(Figure C and Figure 4C).

As described above, in the audio signal recording method according to the present invention, after the beginning signal of one music is issued from the recording medium playing means and before the next beginning signal is issued from the tape recorder. When the tape end signal is issued, the recording medium playing means is put in the pause state, while the first time from the point of occurrence of the first head signal immediately before the tape end signal to the point of generation of the tape end signal is the length of the leader portion of the tape. If it is longer than the predetermined time, which is slightly longer than the time corresponding to the length, the tape recorder is instructed to rewind by the tape length corresponding to the first time, and then the music corresponding to the first music start signal is given to the recording medium playing means. At the same time as instructing to restart the performance from the head, instruct the tape recorder to record, and gradually attenuate the audio signal after the lapse of the difference between the first time and the above predetermined time. If the first time is shorter than the predetermined time, the tape recorder is instructed to rewind by the tape length corresponding to the second time from the beginning signal before the first beginning signal to the tape end signal, and then the recording medium. The performance means is instructed to resume the performance from the beginning of the music corresponding to the music beginning signal immediately before the music beginning signal of 1, and at the same time, the tape recorder is instructed to record, and the difference between the second time and the predetermined time is determined. Since the audio signal is gradually attenuated with the passage of time, it is possible to prevent the music from being suddenly interrupted when the tape end arrives during the performance of the music.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration for carrying out an embodiment of the present invention, FIGS. 2A and 2B are flow charts of a control program for carrying out the present embodiment, and FIGS. The figure is a schematic diagram showing a processing method at the tape end portion in the present embodiment. Explanation of symbols of main parts 1 ...... Disk player 2 ...... Tape recorder 3a, 3b ...... CPU 4a, 4b ...... ROM 5a, 5b ...... RAM 6a, 6b ...... Operation unit 7a, 7b ...... Mechanism control unit 8 …… Servo system 9 …… Disk 10 …… Pickup 11 …… Signal processing system 12 …… Recording signal processing system 13 …… Recording / playback head 14 …… Track head detection circuit 15 …… Playback signal processing system 16 …… Speaker 17 …… Erasing circuit 18 …… Erasing head

Claims (1)

[Claims] 1. A method for recording an audio signal obtained from a recording medium playing means for issuing a music head signal at the start of playing each music piece by a tape recorder for issuing a tape end signal at the tape end time. At the time of occurrence, the recording medium playing means is put into a paused state, while the first time from the point of occurrence of the first leading signal immediately before the tape end signal to the point of occurrence of the tape end signal is the length of the tape leader portion. When it is longer than the predetermined time, which is slightly longer than the corresponding time, the tape recorder is instructed to rewind by the tape length corresponding to the first time, and then the recording medium playing means is responded to the first head signal. The tape recorder is instructed to record at the same time as the instruction to restart the performance from the beginning of the music, and the time difference between the first time and the predetermined time is given. After the lapse of time, the audio signal is gradually attenuated, and when the first time is shorter than the predetermined time, the tape recorder receives a second time from the beginning signal before the first beginning signal to the tape end signal. After instructing rewinding by the tape length corresponding to, the recording medium playing means is instructed to resume playing from the beginning of the music corresponding to the music beginning signal immediately before the first music beginning signal, and at the same time to the tape recorder. A method for recording an audio signal, characterized in that the audio signal is gradually attenuated when a time difference between the second time and the predetermined time elapses.