JPS62232791A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To enable a program searching at a sound part and to discriminate the address of the program searching signal of a tape instantaneously by mixing a voice recording signal with the program searching signal which is composed of an out-of-audio frequency and a recording address is settable to. CONSTITUTION:The program searching signal generated by a generation circuit 12 is composed of an out-of-audio frequency, the generation and stoppage are performed by the signal transmitted from a control terminal 9 and the address designation of what number signal from the initial of the tape is made possible. This program searching signal is mixed with the voice input signal transmitted from the terminal 8 and recorded on the tape via an amplifier 3 and head 1. The signal obtd. from the head 1 at time of program searching is taken out in its program searching signal only via the amplifier 2 and LPF 10 and fed out from the terminal 6 by being decoded 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording/reproducing device, and particularly to cueing during reproduction.

[Conventional technology]

The conventional cueing method for this type of device is to detect a silent portion of an audio signal, which will be explained with reference to FIG. In the figure, (ri is a magnetic head for recording/reproduction, (2)
is a playback amplifier, and (3) is a recording amplifier.

(4) is a no-signal discrimination circuit, and (5) is a switch for creating silence.

(6) is a control signal output terminal, and (7) is a reproduction signal output terminal.

(8) is a recording signal input terminal.

Next, the operation of the above configuration will be explained.

A recording signal inputted to the recording signal input terminal (8) passes through the recording amplifier (3) and is recorded on the tape by the magnetic head (1). At the point where you want to perform this head removal, switch (
5) and mutes the recording signal, silence is recorded.

Next, when reproducing the tape, the signal output from the magnetic head (1) passes through the reproduction amplifier (2) and is output to the reproduction signal output (7) terminal and the no-signal discrimination circuit (4).

If the no-signal determining circuit (4) determines that there is no signal, a control signal is output to the control signal output terminal (6) to stop tape running. Through this series of operations, cueing is performed.

[The point at which the invention attempts to solve the problem]

Conventional devices require a certain amount of silence to detect a single head, and if there is silence in the recorded signal, malfunctions are likely to occur in that area. It is impossible to get it out.

Furthermore, it was impossible to instantly determine which position from the beginning of the tape the tape was located at.

This invention was made in order to solve the above problems, and it is possible to cue up at a sound part, and also to instantly determine which cue signal from the beginning of the tape it is. The purpose is to provide a recording/playback device.

[Means for solving problems]

The magnetic recording and reproducing apparatus according to the present invention includes a cue signal generation circuit that mixes a cue signal consisting of an inaudible frequency code and a recording address settable with an audio signal, and a cue signal generation circuit that controls the cue signal generation circuit. It is provided with an input terminal for inputting a signal, and a filter for separating an audio signal and a cue signal during playback.

[Effect]

In this invention, a cue signal consisting of a code of an inaudible frequency is mixed and recorded with an audio signal, and the cue signal is output separately from the audio signal during playback. Furthermore, it is possible to determine which 11 cue positions the encoded cue signal is at.

[Embodiments of the invention]

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

FIG. 1 is a block diagram 6D showing an example of a magnetic recording/reproducing apparatus according to the present invention, and the same parts as those in FIG.

In the figure, (9) is a cue signal generation circuit (described later).
2) is a control signal input terminal for applying a control signal. αQ is a low-pass filter connected to the output stage of the reproduction amplifier (2), and Cl3) is a decoder connected to the low-pass filter αQ. ■ is a cue signal generation circuit connected to the input side of the recording amplifier, which generates a cue signal composed of non-audible frequencies and consisting of nine codes, so that the address to be recorded is set with the above code. There is.

Next, the operation of the above configuration will be explained.

The cueing signal generated by the cueing signal generating circuit is a code composed of an inaudible frequency (generally less than 20 Hz, more than 1 in 20). Here, a description will be given of a mind-finding signal composed of frequencies of 201 or less. This cueing signal is generated and stopped by a signal inputted through the control input terminal (9). Further, an address can be specified for this cue signal, and it is possible to instantly determine which number from the beginning of the tape the cue signal is. This cue signal is the audio signal input terminal (8)
The signal is mixed with the input signal, passed through the recording amplifier (3), and recorded on the tape by the magnetic head (1).

Next, when searching for the beginning, the tape is fed at a faster speed than the normal speed. The signal obtained by the magnetic head (1) passes through a reproducing amplifier (2).

It is input to a low-pass filter α0. Here, since the signal for starting one is recorded at a lower frequency than the audio signal, only the starting signal is output as the output of the low-pass filter αQ. This cue signal is processed by the decoder αη and outputted from the control output terminal (6). Also,
During normal playback, the output of the playback amplifier (2) is output to the playback signal output terminal (7), but at this time, since the cue signal mixed with the audio signal has a non-audible frequency, there is no problem. In the above example, the cueing signal is composed of a lower frequency than the audio signal, but it can also be composed of a higher frequency than the audio signal and separated from the audio signal by a bypass filter. You may also do so.

[Effects of the Invention] According to the present invention, since a dedicated cueing signal consisting of an inaudible frequency is mixed with an audio signal and recorded and reproduced, there is no malfunction, and the address of the cueing signal is encoded and recorded. This makes it possible to instantly determine which cue signal from the beginning of the tape it is.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of a magnetic recording/reproducing apparatus according to the present invention, and FIG. 2 is a block diagram showing a conventional magnetic recording/reproducing apparatus. (9)...control signal input terminal, output...filter, (
2)...Cueing signal generation circuit. Note that the same line numbers in Figure 1 indicate the same or equivalent parts.

Claims (1)

[Claims] (1) A cue signal generation circuit that mixes a cue signal consisting of a code with an inaudible frequency and a settable recording address into an audio recording signal, and an input terminal for a control signal that controls the cue signal generation circuit. 1. A magnetic recording and reproducing device comprising: and a filter that separates an audio signal and a cue signal during reproduction.