JPS6276002A - Time cord recording and reproducing device for data recorder - Google Patents

Abstract

PURPOSE:To utilize entirely a measuring channel for the measurement by using a burs signal generator/signal synthesizer so as to record a time code on a voice recording track of the data recorder and using a signal separator/ waveform shaping device so as to reproduce the recording. CONSTITUTION:The time code outputted from a time code generator 1 is fed to a burst signal generator 18 via an input terminal 17, converted into a burst signal with a constant frequency and fed to a signal synthesizer 19. On the other hand, the sound signal is fed to the signal synthesizer 19 from a microphone 11, both the signals are synthesized and the synthesized signal is recorded on a magnetic tape 3 via a sound write amplifier 12 and a sound write head 13. The signal is red from the magnetic tape 3 by the sound read head 14 are reproduction and fed to the signal separator 20 via the sound read amplifier 15, the reproduced sound signal and the reproduced burst signal are separated and they are fed to a speaker 16 and the waveform shaping device 21 respectively. The reproduced burst signal is converted into a rectangular reproduced time code and outputted to a time code reader 10.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a time code recording and reproducing device for a data recorder.

[Conventional technology]

Figure 3 shows, for example, "Mitsubishi Electric Branch Axis, published in August 1972.
Volume 47, No. 8, “Recent Measurement Data Processing Systems” 850
1 is a block diagram showing a conventional time code recording and reproducing device of a data recorder shown in the figure, 1 is a time code generator, 2 is a data recorder, and 3 is a data recorder 2 that records data. 4 is a measurement input terminal of the data recorder 2; 5 is a measurement write head for recording a measurement write amplification code for amplifying the signal input to the measurement input terminal 4 on the magnetic tape 3; The output end of the time code generator 1 is connected to a measurement input terminal 4 of a specific channel. 7 is magnetic tape 3
two measuring heads arranged opposite to each other at other positions;
Reference numeral 8 denotes a measurement read amplifier for amplifying the output signal of the measurement read head 7, 9 a measurement output terminal for outputting the output signal of the measurement read head 8 to the outside, and 10 for measurement of a specific channel. This is a time code reader connected to the output terminal 9. 11 is a microphone, 12 is a microphone 11
an audio write amplifier for amplifying an audio output signal; 13 an audio write head for writing the amplified audio output signal onto the magnetic tape 3; 14 an audio write head disposed opposite the magnetic tape 3 at another position; 15 is an audio reading amplifier for amplifying the audio output signal of the audio reading head 14, and 16 is a speaker for reproducing and outputting the amplified audio output signal as audio.

Next, the operation will be explained. The rectangular pulse-shaped time code generated by the time code generator 1 is applied to a specific measurement input terminal 4 of the data recorder 2,
After being amplified by the measurement write amplifier 5, it is recorded on the magnetic tape 3 by the measurement write head 6. During playback, the data is led to the time code reader 10 via the measurement read head 7, the measurement read intensifier 8, and the measurement output terminal 9, and is decoded.

In addition, the measurement conditions are recorded and reproduced in the state of audio using the microphone 11, the audio write amplifier 12, the audio write head 13, the magnetic tape 3, the audio read head 14, the audio read amplifier 15, and the speaker 16. Ru.

[Problems that the invention is supposed to solve]

Since the conventional time code recording and reproducing device of the data recorder is configured as described above, one or two of the measurement channels of the data recorder 2 are exclusively used for time code, so the number of measurement points is large. In such a case,
There were problems such as a lack of channels.

This invention was made to solve the above-mentioned problems, and it is possible to use all the measurement channels of the data recorder, which were originally equipped for measurement, for measurement, and at the same time record and play back time codes. An object of the present invention is to obtain a time code recording and reproducing device for a data recorder that can perform the following steps.

[Means for solving problems]

The time code recording and reproducing device for a data recorder according to the present invention converts a time code into a burst signal, synthesizes this with an audio signal, records it in the audio recording channel of the data recorder, and when playing back, converts the time code into a burst signal and records it in the audio recording channel of the data recorder. The signal and the reproduced burst signal are separated and extracted, and the separated reproduced burst signal is converted into a reproduced time code.

[Effect]

In the time code recording and reproducing device for a data recorder according to the present invention, the time code is converted into a burst signal by the burst signal generator, the burst signal and the audio signal are synthesized by the signal synthesizer, and the reproduced synthesized signal is A signal separation device separates the reproduced audio signal from the reproduced burst signal, and a waveform shaping device converts the reproduced burst signal into a reproduced time code.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, 17 is a time code input terminal provided in a part of the data recorder 2, 18 is a burst signal generator whose input end is connected to the time code input terminal 17, and 19
is a signal synthesizing device which receives the audio signal from the microphone 11 and the burst signal from the burst signal generator 18, synthesizes them, and outputs the synthesized signal to the audio write amplifier 12. 2
゜ is a signal separation device 21 that separates a reproduced audio signal and a reproduced burst signal from the reproduced composite signal outputted from the audio reading amplifier 15 and outputs the reproduced audio signal to the speaker 16;
is a waveform shaping device that shapes the waveform of the reproduced burst signal inputted from the signal separation device 2o, converts it into a reproduced time code, and outputs it to the time code output terminal 22.

Note that the structure between the audio V-included amplifier 12 and the audio reading amplifier 150 is similar to that of the conventional device shown in FIG.
A time code generator 1 and a time code reader 10 are provided separately from a data recorder 2. Further, other parts of the data recorder 2 are constructed in the same manner as shown in FIG.

Next, the operation and effect will be explained with reference to FIGS. 1 and 2. FIG. 2 shows signal waveforms at measurement points (a) to (h) in FIG. 1. The time code output from the time code generator 1 is generally a pulse-like rectangular wave given at time intervals according to a predetermined rule, as shown in FIG. 2(a). This time code is applied to the burst signal generator 18 through the time code input terminal 1T, converted into a burst signal with a constant frequency shown in FIG. 2(b), and applied to one input terminal of the signal synthesizer 19. . On the other hand, the audio signal shown in FIG. 2(c) is applied from the microphone 11 to the other input terminal of the signal synthesizer 19, and both signals are synthesized in the signal synthesizer 19, as shown in FIG. 2(d). It becomes a composite signal. This composite signal is recorded on the magnetic tape 3 via an audio write amplifier 12 and an audio write head 13. During reproduction, the reproduced composite signal read from the magnetic tape 3 by the audio reading head 14 and reproduced as shown in FIG. In the separating device 20, the reproduced audio signal shown in FIG. 2(6) and the reproduced burst signal shown in FIG. 2(f) are separated and applied to the speaker 16 and the waveform shaping device 21, respectively.

The reproduced burst signal input to the waveform shaping device 21 is
The signal is converted into a rectangular waveform reproduction time need as shown in FIG.

Note that the frequency band of the audio recording device of the data recorder 2 has a lower limit of several tens of Hz and an upper limit of several kHz, and since the upper limit frequency of the audio for memory used in measurement is considered to be below IKHz, the frequency of the burst signal is 2~5KH
It is sufficient to select one frequency within the range of z. Further, as the signal synthesis device 19, signal separation device 20, and waveform shaping device 21, an adder circuit, a bandpass filter, a chiral circuit, a low-pass filter, etc. are used, respectively.

In the above embodiment, the microphone 11, the fist speaker 16, the burst signal generator 18, the signal synthesizer 19, the signal separator 20, and the waveform shaping device 21 are built into the data recorder 2.
It may also be configured to be divided from the main body and housed together with another box, for example, the time code generator 1.

[Sorry, the above embodiment] describes the case of a data recorder used for measurement IK, but it is also possible to apply it to a cueing device for general audio tape recorders other than those for music etc. Qin similar effect.

〔Effect of the invention〕

As described above, according to the present invention, a time code is recorded on the audio recording track of a data recorder using a burst signal generator or a signal synthesizer, and is reproduced using a signal separator or waveform shaping device. Since it is configured to do this, it is not necessary to use the measurement channels of the data recorder for time code, and all the measurement channels can be used for measurement, and the time code can also be recorded and reproduced at the same time.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a time code recording and reproducing device for a data recorder according to an example of the present invention, and FIG.
) to (h) are time chart diagrams for explaining the operation of an embodiment of the present invention, and FIG. 3 is a block diagram showing a conventional time code recording and reproducing apparatus for a data recorder. 1 is a time code generator, 2 is a data recorder,
3 is a magnetic tape, 4 is an input terminal for measurement, 5 is a write amplifier for measurement, 6 is a write head for u1 measurement, 7 is a read head for weighing 11, 8 is a 2-increase bump for measurement, 9 is a measurement 10 is a time code reader, 11 is a microphone, 12 is an audio lacquered amplifier, 13 is an audio write head, 14 is an audio read head, 15 is an audio read amplifier, 16 is a speaker, and 1B is a A burst signal generator, 19 a signal synthesis device, 20 a signal separation device, and 21 a waveform shaping device. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] a plurality of measurement write heads that individually record a plurality of measurement signals onto the magnetic tape; a measurement read head that individually reads the written measurement signals from the magnetic tape; and an audio signal captured by a microphone that records the measurement signals on the magnetic tape. In a time code recording and reproducing device for a data recorder, which is equipped with an audio writing head for writing to a sound signal and an audio reading head for reading the written audio signal and outputting it to a speaker, the time code is converted to a burst signal. a burst signal generator for outputting a burst signal from the microphone; a composite signal is formed by synthesizing the audio signal output from the microphone and the burst signal output from the burst signal generator; and the composite signal is sent to the audio write head. a signal synthesizing device for outputting a signal, a signal separating device for separating a reproduced audio signal and a reproduced burst signal from a reproduced composite signal read by the audio reading head, and outputting the reproduced audio signal to the speaker; A time code recording and reproducing device for a data recorder, comprising: a waveform shaping device that converts the reproduced burst signal outputted from the device into a reproduced time code.