JPS63234446A - Digital signal recording and reproducing device - Google Patents

Abstract

PURPOSE:To easily search and edit programs of music by arranging multitrack fixed heads and analog signal recording and reproducing heads and assigning digital tracks in accordance with channels to form analog tracks and PCM tracks and recording signals. CONSTITUTION:Digital tracks are assigned in accordance with channels, and PCM tracks 8a1-8a3 and an analog track 6a are formed on a tape, and signals are recorded on these tracks. When the recording mode is set, an analog circuit system 3a records the audio signal inputted to an input terminal 9a on the track 6a as the analog signal and a pulse code modulation PCM circuit system 4a records the audio signal on tracks 8a1-8a3 as the PCM signal. If the PCM circuit system 4a is in the unoperated state and only the analog circuit system 3a is set to the reproducing mode in the stop, fast forwarding, or rewinding more, 'monkey voice' can be heard from an output terminal 10a. Thus, programs of music are easily searched and edited.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides pulse code conversion for analog signals such as audio signals.
This invention relates to a multi-track fixed head type digital signal recording and reproducing device (hereinafter simply referred to as PCM recorder) that records data using 1. The present invention relates to a digital signal recording and reproducing device that can perform digital signal recording and reproducing.

Recently, pcM recorders have been developed as high-fidelity audio tape recorders, but among them, multi-track fixed head PCM recorders are mechanically simple and have the same tape running system as normal analog tape recorders. Therefore, practical application is progressing. One of the functions of this type of PCM recorder, which is inferior to that of an analog tape recorder, is that it is not possible to accurately locate and edit the beginning of a song. In other words, in an analog tape recorder, when reproducing signals recorded on the trunk of a magnetic tape, the analog circuit system is set to playback mode, mechanically set to stop mode, and the supply reel and take-up reel are operated with both hands. When you run the tape by hand, you will hear a ``wow'' sound at certain parts of the tape, so you can know the exact position of the song on the tape, and you can also use it when fast forwarding or rewinding. By setting the analog circuit system to playback mode, you can hear the so-called "monkey voice." However, in the above-mentioned PCM recorder, even if the PCM circuit system is set to playback mode and the signal is played back in the same state as in an analog tape recorder, the clock pulses that drive and control each circuit are not played back or are not played back. Since the PCM signals are also very irregular, it is impossible to demodulate the signals recorded in PCM on each track, which causes problems in finding the beginning of a song, editing, etc. In addition, editing for channels was difficult.

The present invention has been made to eliminate the above-mentioned drawbacks, and includes a PCM circuit system that converts input analog signals into PCM and records and reproduces them, and an analog circuit system that records and reproduces the analog signals in an analog state. In addition to allocating digital tracks corresponding to the channels, creating a PCM track and an analog track on the tape and recording signals on each track, it is possible to easily find the beginning of a song or edit it. The object of the present invention is to provide a fixed track head type PCM recorder.

Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 is a fundamental configuration diagram showing an embodiment of the PCM recorder of the present invention, and shows a case where analog signals corresponding to a plurality of channels are recorded and reproduced. In the same figure, (
11 is a magnetic tape that can be run in the direction of the arrow by a tape running drive mechanism (not shown); (2) is an electric circuit main body that uses audio signals as analog input signals; A pair of analog circuit systems (3a), -(3n) and P correspond to the number of channels.
It consists of a CM circuit system (4a) and -(4n). This analog circuit system (3a), . . . (3n) sends each output to the head (5a), . ), .
), ... (4n) output each output from a multi-track fixed head (7a1) - (7a3), ... (7n, ) - (7n
s), the required number of tracks (8a+) to (8a2), -(8n+) are recorded on the magnetic tape (1).
) to (8n3) to perform PCM recording and demodulate it. In this case, each analog circuit system (3a), ... (3n) can use a signal recording/reproducing circuit used in a normal analog tape recorder, and in the recording mode, 3a).

... (3n), input terminal (9a), ...
The audio signals of multiple channels input manually to (9n) are sent to each head (5a).

...(5n) causes trunk (6a), ...(6
n) and recorded in an analog state on the magnetic tape (11), and in playback mode, each head (5a), .
...The analog output read at (5n) is the analog circuit system (3'a).

. . . (3n), the audio signal is subjected to signal processing such as equalization and amplification, and is output from the output terminals (10a) . . . (Ion) as the original audio signal corresponding to each channel. In addition, the analog circuit system (3a
).

... (3n) is for auxiliary use, so it does not need to be of high quality. The above PCM circuit system (4a),...(4n)
converts the audio signal of the channel corresponding to each input terminal (9a), ... (9n) into PCM, and sends the PCM signal to the multi-trunk fixed head (7a+) to (7as).
+-(7r++) ~(7n3) and each trunk (8a-+) ~(8a-),...(8n,) ~(8
n,), PCM recording is performed on the magnetic tape (1), and the data is demodulated and reproduced. The electric circuit main body (2) is arranged so that the analog circuit system (3a), ... (3n) and the PCM circuit system (4a), ... (4n) have a recording function in the recording mode, and in the playback mode. In the PCM circuit system (4a),...
- PCM circuit system (4a) in stop, fast forward or rewind mode so that only (4n) has playback function.

. . . (4n) are set to a non-operating state, and only the analog circuit systems (3a), . . . (, 3n) are set to a reproduction mode.

In the PCM recorder configured in this way, when an audio signal is transmitted to one channel, when the recording mode is set, the analog circuit system (3a) is connected to the input terminal (
At the same time, the PCM circuit system (4a) records the audio signal inputted in analog state on the track (6a) of the magnetic tape (1) in an analog state, and at the same time, the PCM circuit system (4a) converts the audio signal into PCM to each track (8aI) to (8az). Record. After this recording, when the playback mode is set, the PCM circuit system (4a)
is in playback mode, and each trunk (8a, ) to (
8ai) is demodulated and sent to the output terminal (
10a) to reproduce the original audio signal.

Furthermore, in stop, fast forward or rewind mode, if the PCM circuit system (4a) is inactive and only the analog circuit system (3a) is set to playback mode, this analog circuit system (3a) Output terminal (10a) for outputting the analog audio signal recorded in 6a)
You can hear the "monkey voice" because it is extracted from Therefore, since the position of the song on the tape can be accurately known from this sound, it is possible to easily find the beginning of the song and edit it in the PCM recorder. In this example, the outputs of the analog circuit systems (3a) to (3n) and the outputs of the PCM circuit systems (4a) to (4n) are taken out from common output terminals (10a) to (Ion). However, by providing output terminals for each circuit system independently, each analog circuit system (3a) to (3n) can be set to playback mode when not in recording mode, simplifying the sequence control system. can be converted into

FIG. 2 is a basic configuration diagram showing another embodiment of the PCM recorder according to the present invention, and the same parts as in FIG. 1 are given the same numbers. In the figure, an adder αυ for adding audio signals corresponding to multiple channels such as stereo or 4 channels is added to the analog circuit system (3a), and the added output is output as a monaural audio signal to the head. (5a), one track is formed and recorded on the magnetic tape for multiple channels of audio signals. In this case, (2) is the output terminal of the analog circuit system (3a).

According to this embodiment, the utilization rate of the magnetic tape can be improved as compared to the previously described embodiments, and the apparatus can be simplified. Note that instead of forming one track for audio signals of multiple channels, several trunks may be formed.

In the embodiments described above, an audio record was described, but it goes without saying that the present invention can also be applied to a data recorder for measurement.

As explained above, the PCM recorder according to the present invention has
A multi-track fixed head for recording and reproducing digital signals and an analog signal recording and reproducing head for recording and reproducing analog signals are arranged, and digital tracks are assigned corresponding to the channels to form analog tracks and PCM) racks. I decided to record it by
By playing analog track signals in stop, fast forward, or rewind modes, you can hear "monkey voices" and more, making it easy to cue and edit songs, as well as channel-compatible editing. Furthermore, since the reproduction circuit becomes independent, there is an effect that other channels will not be affected in the event of a failure.

[Brief explanation of the drawing]

FIG. 1 is a principle block diagram showing one embodiment of the digital signal recording/reproducing apparatus of the present invention, and FIG. 2 is a principle block diagram showing another embodiment of the digital signal recording/reproducing apparatus of the present invention. . In the figure, (11 is a magnetic tape, (2) is an electric circuit body, (3a) to (3n) are analog circuit systems, and (4a) to
(4n) is the PCM circuit system, (5a) to (5n) are the head (for analog), (7a) to (7n) are the head (PC
(for M), (9a) to (9n) are input terminals, (10a)
~(Ion) is an output terminal, 0υ is an adder, and @ is an output terminal (for analog). Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] In a multi-track fixed head type digital signal recording and reproducing device that records analog input signals by pulse code modulation, an analog circuit system that allocates digital tracks corresponding to channels and records and reproduces the analog input signals in an analog state is provided. What is claimed is: 1. A digital signal recording and reproducing apparatus, characterized in that a pulse code modulation track and an analog track are formed and recorded on a magnetic tape.