JPH03105702A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To enlarge deviation and emphasis amts. of a luminance signal to be FM-modulated and to raise a recording level of a chrominance signal by recording/reproducing the chrominance signal with a head which is different from that for the luminance signal. CONSTITUTION:A signal to be supplied to a head 4 for recording the luminance signal is the signal FM-modulated in a recording processing circuit 1, while signals to be supplied to a head 5 are a sound signal FM-modulated in a recording processing circuit 3 and the chrominance signal frequency-converted into a low band in a recording processing circuit 2. The individual signals are supplied to the heads, which are the heads 4a and 4b for recording/reproducing the luminance signal and the heads 5a and 5b for recording/reproducing the chrominance signal and the sound signal, having their different azimuthal angles. By this method, the emphasis amt. and deviation of the luminance signal are enlarged, and the recording level of the chrominance signal is increased, so that the S/N ratio can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a magnetic recording/reproducing device (hereinafter referred to as a video) that records/reproduces a video signal and an audio signal using different heads.

BACKGROUND TECHNOLOGY Conventionally, in order to achieve high quality sound, a new audio head has been newly added to develop video.

In this high-fidelity video, FM
A first head that simultaneously records/reproduces a modulated luminance signal and a color signal frequency-converted to a low frequency range, and a second head that records/reproduces an FM-modulated audio signal as shown in FIG. 6b. is provided, and by changing the azimuth angle of the first head and the second head, superimposed recording of the video signal and the audio signal is realized. This not only provides the video function of recording and playing back your favorite images at any time, but also provides audio performance comparable to high-fidelity audio.

Problems to be Solved by the Invention However, in the above configuration, since the luminance signal and the chrominance signal are frequency multiplexed, when trying to suppress cross-modulation between the luminance signal and the chrominance signal, the emphasis of the luminance signal is increased. Thicken the amount or deviation, or increase the S of the color signal.
The problem was that the recording level could not be increased in order to improve the N ratio.

In view of the above problem M1, the present invention provides a magnetic recording and reproducing device that can increase the amount of emphasis and debiasing without causing cross-modulation between luminance signals and color signals, and achieve a high SN ratio and high resolution. It provides:

Means for Solving the Problems In order to solve the above problems, the magnetic recording/reproducing device of the present invention has a first head for recording/reproducing a video signal with a wide required bandwidth, and a first head having an azimuth angle different from that of the first head. and a second head for recording/reproducing an audio signal, and the second head is configured to record/reproduce a video signal having a narrow required bandwidth at the same time as the audio signal.

Effect of the Invention With the above-described configuration, the present invention makes it possible to record/reproduce color signals using a head different from that used for brightness signals, and to greatly increase the debiasing and emphasis amount of FM-modulated brightness signals. It becomes possible to increase the recording level of the signal.

Embodiment Below, a magnetic recording and reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a recording/reproducing system of a magnetic recording/reproducing apparatus according to a first embodiment of the present invention.

In FIG. 1, 1 is a first recording processing circuit that converts a video signal (hereinafter referred to as a luminance signal) into a signal suitable for recording, and 4 is a head that records the luminance signal on a magnetic tape 6. . 2 converts a video signal (hereinafter referred to as a chrominance signal) having a narrower bandwidth than the luminance signal into a signal suitable for recording.
This is a recording processing circuit. 3 is a third recording processing circuit that converts the audio signal into a signal suitable for recording, and 5 is a head that records the color signal and audio signal simultaneously. 7 is a head that reproduces a luminance signal; and 8 is a head that simultaneously reproduces a color signal and an audio signal. 9 is a reproduction processing circuit that reproduces a luminance signal from the signal reproduced from the head 7; 10 is a reproduction processing circuit that reproduces a color signal from the signal reproduced from the head 8; and 11 is a reproduction processing circuit that reproduces an audio signal from the signal reproduced from the head 8. This is a reproduction processing circuit that reproduces signals.

The operation of the magnetic recording/reproducing apparatus constructed as above will be explained below with reference to FIG. 1, FIG. 2, and FIG. 3.

In FIG. 1, the signal supplied to the head 4 for recording the luminance signal is transmitted to the recording processing circuit 1 as shown in FIG. 2 (&).
This is an FM modulated signal.

i fc, the signal supplied to the head 6 is as shown in FIG. 2(b)
As shown in FIG. 3, the audio signal is 1M modulated in the recording processing circuit 3 and the color signal is frequency-converted to a low frequency in the recording processing circuit 2. Each signal is supplied to a head configured as shown in FIG. In Figure 3, 41L, 4b
5a and 5b are heads for recording/reproducing a luminance signal, and heads 5a and 5b are heads for recording/reproducing a color signal and an audio signal.
b, 5a, and 5b have different azimuth angles. In Fig. 3, 12 is a magnetic tape, 13 is a rotating cylinder, and 14 is a magnetic tape.
16 is the direction of rotation of the rotary cylinder, and 16 is the running direction of the magnetic tape.

As described above, according to the present embodiment, the first head records/reproduces a luminance signal, and the second head has a different azimuth angle from the first head and records/reproduces an audio signal,
The second head records the color signal as well as the audio signal.
By adopting the configuration of reproducing, there is no need to frequency multiplex the luminance signal and the chrominance signal, and cross-modulation between the luminance signal and the chrominance signal does not occur. That is, it becomes possible to increase the amount of emphasis and deviation of the luminance signal, increase the recording level of the color signal, and improve the S/N ratio.

A second embodiment of the present invention will be described below with reference to the drawings.

FIG. 4 shows a recording track pattern of a magnetic recording/reproducing apparatus showing an embodiment of the present invention. What differs from the configuration shown in FIG. 1 is the recording track pattern of the head for recording/reproducing the luminance signal and the head for recording/reproducing the audio signal and color signal. In Figure 4, 161L, 171L, 18
&, 191L are track patterns recorded by the heads 4a and 4b in FIG. 3, and a luminance signal is recorded therein.

1ab, 17b, 18b, and 19b are track patterns recorded by the heads sa and 6b in FIG. 3, in which audio signals and color signals are recorded. The track on which the luminance signal is recorded and the track on which the audio signal and color signal are recorded have opposite azimuth angles, so that the tracks do not interfere with each other's signals.

As described above, by making the azimuth angle of the head that records the luminance signal and the head that records the audio signal and chrominance signal opposite, the azimuth loss can be used to record the luminance signal and chrominance signal. interference between the two can be reduced.

In the first embodiment, the color signal is a color signal frequency-converted to a low frequency band, but as shown in FIG. 5(b), F
It may be an M-modulated color signal.

Furthermore, in the first embodiment, the color signal is set to the low frequency range of the FM-modulated audio signal, but it may be set to the high frequency range.

Furthermore, although the signal recorded simultaneously with the color signal is an FM modulated audio signal, it may be a PGM audio signal or text information.

Effects of the Invention As described above, the present invention has a first head for recording/reproducing video signals with a wide required bandwidth, and a second head having an azimuth angle different from that of the first head and recording/reproducing audio signals. By recording/reproducing a video signal with a narrow required bandwidth at the same time as the audio signal in the second head, there is no need to frequency multiplex the luminance signal and chrominance signal. No cross-modulation occurs between the two. That is, it is possible to increase the amount of emphasis and deviation of the luminance signal, increase the recording level of the color signal, and improve the SN ratio.

The azimuth angle of the recording track of the first head and the second
By reversing the azimuth angles of the recording tracks of the head, azimuth loss can be exploited to reduce interference between the luminance and chrominance signals.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a magnetic recording/reproducing apparatus according to the first embodiment of the present invention, FIGS. 2 and 5 are frequency allocation diagrams of the recording signal of FIG. 1, and FIG. FIG. 4 is a diagram showing the recording track pattern of a button according to a second embodiment of the present invention, and FIG. 4 is a diagram showing a frequency allocation diagram of a conventional magnetic recording/reproducing apparatus. 1, 2.3... Recording processing circuit, 9, 10.1
1...Reproduction processing circuit.

Claims (1)

[Claims] a first head for recording/reproducing a first video signal wider than a required bandwidth; a second head having an azimuth angle different from the first head and recording/reproducing an audio signal;
1. A magnetic recording/reproducing device characterized in that the head is configured to simultaneously record/reproduce a second video signal having a narrower bandwidth than a required bandwidth along with an audio signal.