KR19990001153U - VRC's Stereo Audio Signal Recorder - Google Patents

Abstract

The present invention relates to a stereo audio signal recording apparatus of V-Cal for recording a stereo audio signal on a video tape 60, wherein the first carrier generates a first stereo signal by FM-modulating the first carrier to a first channel audio signal. A stereo signal generator 100; A second stereo signal generator 200 which FM modulates the second carrier with a second channel audio signal to generate a second stereo signal; A first audio head 54 for recording the first stereo signal on the video tape 60; It is composed of a second audio head 56 which records the second stereo signal on the video tape 60, so as to provide high quality stereo sound to the user.

Description

VRC's Stereo Audio Signal Recorder

The present invention relates to a video cassette recorder (hereinafter abbreviated as V-seal), and more particularly to a stereo audio signal recording apparatus of V-seal for recording a stereo audio signal.

The recording of the audio signal in VRC adopts a method of mixing the modulated and amplified audio signal with an alternating current bias and providing the fixed head.

FIG. 1 is a block diagram of an audio signal recording apparatus for explaining in detail the audio signal recording method of V-Cal.

In FIG. 1, an audio signal flowing through an external antenna (not shown) is provided to the noise attenuator 10 through an audio input terminal. The noise attenuator 10 compresses an input level of an input audio signal and suppresses noise to provide the modulator 20. The modulator 20 modulates a carrier frequency with an input audio signal to filter the low pass. Provided to 30.

The low pass filter 30 band-limits the output of the modulator and provides it to the amplifier 40. The amplifier 40 amplifies it and provides it to one audio head 50, and the audio head 50 includes an amplifier ( The output of 40 is recorded on the video tape 60.

As described above, in the conventional VRC, only the mono audio signal can be recorded in one audio head.

Therefore, there is a problem that can not provide a good stereo sound to the general public.

Accordingly, an object of the present invention is to provide a stereo audio signal recording apparatus of V-Cal using two L / R audio heads.

In order to achieve the above object, the present invention provides a stereo audio signal recording device of V-Cal for recording a stereo audio signal on a video tape, and generates a first stereo signal by performing FM modulation on a first carrier to a first channel audio signal. A first stereo signal generator; A second stereo signal generator for FM-modulating the second carrier into a second channel audio signal to generate a second stereo signal; A first audio head for recording the first stereo signal on a video tape; Provided is a stereo audio signal recording apparatus of V-C, comprising a second audio head for recording a second stereo signal on a video tape.

1 is a block diagram illustrating a general configuration of an audio signal recording apparatus of VRC;

2 is a block diagram of a stereo audio signal recording apparatus of VR in accordance with the present invention;

3 is a detailed view of the stereo audio head of FIG.

4 shows a stereo audio signal recorded on the video tape of FIG.

<Description of the code | symbol about the principal part of drawing>

10, 12: noise attenuator 20, 22: modulator

30, 32: low pass filter 40, 42: amplifier

50: audio head 54: L audio head

56: R audio head 60: video tape

100: first stereo signal generator 200: second stereo signal generator

The above object and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

Figure 2 is a block diagram of a stereo audio signal recording apparatus of VR in accordance with the present invention.

Prior to the description, VRC for recording the stereo audio signal according to the present embodiment is based on the premise that its external input terminals are divided into L and R channels.

As shown in FIG. 2, the stereo audio signal recording apparatus may be broadly divided into a first stereo audio signal recording apparatus 100 and a second stereo audio signal recording apparatus 100.

First, referring to the first stereo audio signal recording apparatus 100, the L channel audio signal is provided to the noise attenuator 10 through the L audio input terminal. The noise attenuator 10 compresses an input level of an input L audio signal, suppresses noise, and provides the modulator 20. The modulator 20 modulates a first carrier, for example 70 KHz, into an L audio signal to be input to the low pass filter 30, and the low pass filter 30 band-limits the output of the modulator 20. The amplifier 40 is provided.

Meanwhile, the R channel audio signal applied to the second stereo audio recording apparatus 200 is provided to the noise attenuator 12 through the R audio input terminal. The noise attenuator 12 compresses an input level of an input R audio signal, suppresses noise, and provides the modulator 22. The modulator 22 modulates a second carrier, e.g., 150 KHz, into an R audio signal to be input to the low pass filter 32. The low pass filter 32 band-limits the output of the modulator 22. The amplifier 42 is provided.

At this time, the output signals of the different frequency bands provided by the above-described amplifiers 40 and 42 are transmitted to two audio heads (L audio head 54 and R audio head 56) as shown in FIG. Each is provided and recorded in the L / R audio track of the video tape 60 of FIG. 4 as the video tape 60 travels.

In detail, the thickness of each of the audio heads 54 and 56 is 0.075 mm (half the size of the general audio head thickness) and is attached in parallel with each other.

That is, the L output signal amplified by the amplifier 40 is provided to the L audio head 54, which records the L output of the amplifier 40 on the L audio track of the video tape 60. . In addition, the R output signal amplified by the amplifier 42 is provided to the R audio head 56, which records the R output of the amplifier 42 on the R audio track of the video tape 60. .

Therefore, stereo recording of the audio signal input from the outside becomes possible.

As described above, the present invention has the effect of providing high quality stereo sound to the user.

Claims (1)

A stereo audio signal recording apparatus of V-Cal for recording a stereo audio signal on a video tape 60 on an audio track of a video tape, A first stereo signal generator (100) for FM-modulating the first carrier into a first channel audio signal to generate a first stereo signal; A second stereo signal generator 200 which FM modulates the second carrier with a second channel audio signal to generate a second stereo signal; A first audio head (54) for recording the first stereo signal to the video tape (60); And a second audio head (56) for recording the second stereo signal on the video tape (60).