JPH0997403A - Sound recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a user to easily listen to monitor sound by applying the sound signal outputted from a reproducing side device at the time of high-speed dubbing to a talking speed conversion processing means and using the output of this processing means as the monitor signal for the sound recording contents at the time of high-speed dubbing. SOLUTION: The talking speed conversion processing means 8 is connected to between the preamplifier 3 and sound volume controller 5 of the reproducing side device 1. This processing means 8 includes a silent part compressing means 9 for deleting the silent parts of the sound signals, a reproduced signal extending means 10 for extending the sound signals only for the time corresponding to the time of the deleted silent parts and a scale adjusting means 11 for returning the scale of the sound signals to the original scale. The motor (not shown in the Fig.) of the reproducing side device 1 and the motor (not shown in the Fig.) of the sound recording side device are simultaneously changed over to a double-speed when a dubbing speed changeover switch (not shown in the Fig.) is changed over to a high speed side at the time of a dubbing mode by a mode switch (not shown in the Fig.). The tapes (not shown in the Fig.) mounted at the reproducing side device 1 and the sound recording side device 2, respectively, travel at a speed twice the standard tape speed.

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 having a high speed dubbing function.

[0002]

2. Description of the Related Art In a conventional recording / reproducing apparatus having a dubbing function, recorded contents can be reproduced and monitored even during high-speed dubbing. For example, the recorded content can be played back and monitored at double speed.

FIG. 3 is a block diagram showing a conventional tape recorder having a high-speed dubbing function.

The tape recorder of FIG. 3 is provided with a reproducing side device 1 including a reproducing tape mechanism and a recording side device 2 including a recording side tape mechanism, and is reproduced by the reproducing side device 1 and taken out from the preamplifier 3. The reproduction signal is applied to the preamplifier 4 of the recording side device 2 and recorded (dubbed) on the tape of the recording side device 2. Further, a part of the reproduction signal passes through the volume controller 5, the speaker driving amplifier 6 and the speaker 7. As a result, the recorded content can be monitored during dubbing, and the recorded content can be monitored even during high-speed (eg, double speed) dubbing.

[0005]

However, in this case, since the reproduction speed is twice as fast as usual and the pitch (key) also changes, it is very difficult to understand the recorded contents during dubbing.

The present invention proposes a recording / reproducing apparatus which enables the user to understand the recorded contents even during high-speed dubbing.

[0007]

In view of the above points, the present invention provides a recording / reproducing apparatus having a high-speed dubbing function,
It is characterized in that the audio signal output from the reproduction side device at the time of high-speed dubbing is added to the voice speed conversion processing means, and the output of the voice speed conversion processing means is used as a monitor signal of the recorded contents at the time of high speed dubbing.

Further, according to the present invention, the voice speed conversion processing means includes a silent portion compression means for deleting a silent portion of the audio signal, and a reproduction signal for expanding the audio signal for a time corresponding to the time of the deleted silent portion. It is characterized by comprising expansion means and pitch adjusting means for returning the pitch of the audio signal to the original pitch.

Further, the present invention is characterized in that the high speed dubbing is a double speed dubbing.

[0010]

DETAILED DESCRIPTION OF THE INVENTION FIG. 1 shows a tape recorder using the present invention. In FIG. 1, the same reference numerals as those in FIG. 3 are used for the same portions as those in FIG.

In the embodiment shown in FIG. 1, a voice speed conversion processing means 8 is provided between the preamplifier 3 of the reproduction side apparatus 1 and the volume controller 5.
Are connected. The speech speed conversion processing means 8 includes a silent portion compression means 9 for deleting a silent portion of an audio signal, a reproduction signal expansion means 10 for expanding the audio signal for a time corresponding to the time of the deleted silent portion, and It includes a pitch adjusting means 11 for returning the pitch of the audio signal to the original pitch, and for example, a voice speed conversion system LSI manufactured by Sanyo Electric Co.
(LC85400E) is available.

Next, the operation of the circuit shown in FIG. 1 will be described.

When the dubbing speed changeover switch (not shown) is switched to the high speed side by the mode switch (not shown) in the dubbing mode, the motor (not shown) of the reproduction side apparatus 1 and the recording are performed. The motor (not shown) of the side device 2 is simultaneously switched to high speed (double speed), and the tapes (not shown) mounted on the reproducing side device 1 and the recording side device 2 respectively have standard tape speeds of 4. Travel at twice the speed of 75 cm / sec.

FIG. 2 is a schematic diagram showing voice output.
2A shows the original audio output, that is, the audio output when the tape is reproduced at the standard speed, and FIG. 2B shows the audio output when the tape is reproduced at the double speed. It is output to the output terminal 12.

The audio signal output to the output terminal 12 is applied to the preamplifier 4 of the recording side device 2 and the high speed (2
Double speed) Dubbing is executed.

The voice signal output to the output terminal 12 is also applied to the voice speed conversion processing means 8 so that the silent portion is deleted by the silent portion compressing means 9 and only the time corresponding to the time of the deleted silent portion. It is expanded by the reproduction signal expansion means 10 [FIG. 2 (c)]. Further, the pitch of the audio signal is the pitch adjusting means 11
Then, the pitch of the original voice output is restored.

As described above, the audio signal processed by the speech speed conversion processing means 8 is applied to the speaker 7 via the volume adjusting device 5 and the speaker driving amplifier 6 and output as a monitor sound.

Therefore, the monitor sound emitted from the speaker 7 is easy to hear, and the recorded contents during high-speed dubbing can be easily understood.

In the embodiment of FIG. 1, an example in which a tape is used as a recording medium in a tape recorder has been described.
The present invention is not limited to such an embodiment, and may be a recording / reproducing apparatus using, for example, an MD or an IC as a recording medium.

[0020]

As described above, according to the present invention, the voice signal output from the reproducing side device at the time of high-speed dubbing is added to the voice speed conversion processing means, and the output of this voice speed conversion processing means is supplied at the time of high speed dubbing. Since it is used as the monitor signal of the recorded content, the monitor sound emitted from the speaker can be easily heard, and the recorded content during high-speed dubbing can be easily understood.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a recording / reproducing apparatus of the present invention.

FIG. 2 is a schematic diagram showing voice output.

FIG. 3 is a block diagram showing a conventional recording / reproducing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Playback side device 2 Recording side device 8 Speech speed conversion processing means 9 Silent part compression means 10 Playback signal expansion means 11 Pitch adjustment means

Claims (3)

[Claims] 1. In a recording / reproducing apparatus having a high-speed dubbing function, an audio signal output from a reproducing side device at the time of high-speed dubbing is added to a speech speed conversion processing means, and the output of the speech speed conversion processing means is changed at the time of high-speed dubbing. A recording / playback device characterized by being used as a monitor signal of recorded contents. 2. The speech speed conversion processing means, a silent portion compression means for deleting a silent portion of the audio signal, and a reproduction signal expansion means for expanding the audio signal by a time corresponding to the time of the deleted silent portion. A pitch adjusting means for returning the pitch of the audio signal to the original pitch.
Recording and playback device described. 3. The recording / reproducing apparatus according to claim 1, wherein the high-speed dubbing is double-speed dubbing.