JPS6252703A - Deep layer recording system for audio signal - Google Patents

Abstract

PURPOSE:To use this system in common for the recording/reproduction of the VHS system and the Y/C separation and to attain high fidelity reproduction by fitting an audio head with a prescribed preceding angle at a prescribed height of a rotary drum and applying deep layer recording to an audio signal at the recording of a video signal in the standard mode and the long time mode. CONSTITUTION:An audio head 6 is fitted to a position of a preceding angle theta=(348.4 deg.) of a rotary drum 1 to the standard mode video head 2 and other audio head 7 is fitted around a position apart by 180 deg.. In the case of the deep layer recording system with the standard mode, a video signal is fed to the standard mode video heads 2, 3 and an FM audio signal is fed to the audio heads 6, 7. In case of the deep layer recording at the long time mode, the video signal is fed to long time mode video heads 4, 5 and the FM audio signal is fed to the audio heads 6, 7 to reduce the running speed of a magnetic tape 8.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a deep recording method for audio signals, and in particular, to a method for recording separate Y and C signals using a standard mode video head and a long mode video head. This invention relates to a deep recording method for audio signals in the magnetic recording method used.

(Prior Art) For example, in the VHS system, which is a type of general magnetic recording system, a standard mode video head and a long time mode video head are attached to a rotating drum, as well as an audio head. An FM audio signal is deep-recorded in advance at a track position of a magnetic tape to be recorded by a video head in an audio mode.

By the way, the image quality can be improved by separating the NTSC signal into a Y signal (luminance signal) and a C signal (color signal) and recording them separately on magnetic tape using a Y signal head and a C signal head. Are known.

Therefore, the applicant installed a pair of standard mode video heads on a rotating drum at 180° intervals, and installed a pair of long mode video heads at a constant distance from each standard mode video head in the direction of the rotation axis of the rotating drum. It was proposed that a pair of standard mode video heads be used as Y signal heads, and a pair of long time mode video heads be used as C signal heads. This makes it possible to record and reproduce the VH3 system and to perform separate recording and reproduction of the Y signal and C signal using the same head.

However, as mentioned above, in order to share the VH3 system with the Y and C separate recording system, it is not possible to simply position the standard mode video head and the long mode video head. It is impossible to record.

(Means for Solving the Problems) The present invention was made to solve the above problems, and it connects the standard mode video head and the long mode video head attached to the rotating drum to the Y signal and the C signal. In a magnetic recording system that also serves as a signal recording head, an audio head is attached to a predetermined position on a rotating drum, and the purpose of this invention is to provide a system in which audio signals are deep-recorded by this audio head in advance of bidet No. 48. do.

(Embodiments of the Invention) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a rotating drum 1 used in the deep recording method according to the present invention, and FIG. 2 shows the arrangement positions of heads on this rotating drum 1. As shown in FIG.

That is, a pair of standard mode video heads 2.3 are mounted on the same circumference on the circumferential surface of the rotating drum 1 with an interval of 1800 mm. Moreover, on the circumferential surface of the rotating drum 1,
A pair of long-time mode video heads 2.3 are respectively attached to a pair of long-time mode video heads 4.5 at positions spaced apart from each other in the direction of the rotation axis of the drum 1. The standard mode video head 2.3 has a width of 46 #Lm, the long mode video head 4.5 has a width of 2 full m,
The distance T between the standard mode video head 2.3 and the long mode video head 4.5 is set to 18° and 5 m.

An audio head 6 is attached to the rotary drum 1 at a leading angle θ (=348.4°) with respect to the standard mode video head 2, and other audio heads are installed at a position 180° away from the rotating drum 1 on its circumferential surface. 7 is installed. These audio heads 6.7 have a width of 271 Lm, and the separation T2 from the long mode video head 4 (5) is set to 30.3 gm.

Here, a Y signal and C signal separation recording method using the rotary drum 1 will be explained.

In this case, one standard mode video head 2 is
The other standard mode video head 3 is used as the Ch2 Y signal head and the Ch2 Y signal head. In addition, one of the long-time mode video heads 4 is connected to Chi's C
As a signal head, the other long-time mode video head 5 is used as a head for the C signal of ch2.

Then, as shown in FIG. 3(A), when the running speed of the magnetic tape 8 is increased and the magnetic tape 8 is magnetized by each video head, the standard mode video heads 2 and 3 are placed on the magnetic tape 8. The Y track 10 of Chi and the Y track 11 of Ch2 are recorded, and the long mode video heads 4 and 5 record the C track 12 of chi and the C track of Ch2.
Track 13 is recorded.

In i3[ff1(A), 14 indicates a control track, and 15.16 indicates audio tracks of Chi and Ch2, respectively.

Furthermore, a guard band 17 is provided between the Y track and the C track, as shown in FIG. 3(B).

Next, a deep recording method for audio signals according to the present invention will be explained.

First, to explain the deep recording method in the standard mode, in this case, a video signal is supplied to the standard mode video heads 2 and 3, and an FM signal is supplied to the audio heads 6 and 7.
Provides audio signals. As mentioned above, the audio head 6.7 is mounted at a predetermined position on the rotating drum with a predetermined leading angle θ. Therefore, magnetic tape 8
As shown in FIG. 4, prior to the recording of the Chi video track 18 by the standard mode video head 2, the FM audio track 19 of Ch2 is deep-layered at the center position of the video track 18 by the audio head. recorded. Also, on the magnetic tape 8, there is a video track 20 of Ch2 from another standard mode video head 3.
Prior to recording, the audio head 7 deeply records Chi's FM audio track 21 at the center position of the video track 20.

Next, we will explain the deep recording method in long-term mode.
In this case, the video signals are supplied to the long-time mode video heads 4 and 5, and the audio heads 6 and 7 are supplied with the video signal.
The magnetic tape 8 is supplied with an FM audio signal to reduce the running speed of the magnetic tape 8.

Therefore, on the magnetic tape 8, as shown in FIG. Deep recording is made at the center position of the track 22. Also, magnetic tape 8
Above are other long mode videos by Rad5 Ch.
Prior to recording of the Ch2 video track 24, the audio head 6 records the Ch2 FM audio track 25.
is recorded deep in the center position of the video track 24.

In the above embodiment, standard mode video rad 2.3
When the interval T1 of the long-time mode video head 4.5 is changed, the leading angle θ and height T of the audio head 6.7 are changed.
Of course, 2 changes.

By the way, each head 2.4 has the same azimuth angle, 3.
5 to the rotating drum 1 at the opposite azimuth angle,
In addition, when double-feeding is performed in component recording, the leading angle θ of the audio radar 6 is as follows in order to deeply record an FM audio signal using the VH3 system.

That is, in the NTSC system, 332° x 3600, PA
In the L method, the range is 314° and θ<360'.

(Effects of the Invention) According to the present invention, in a magnetic recording system in which a standard mode video head and a long time mode video head attached to a rotating drum are used as Y signal and C signal heads,
The audio head is installed at a predetermined height position on the rotating drum with a predetermined leading angle, and the audio signal is recorded deep when recording video signals in the standard mode and long-time mode. -C It is possible to provide a video tape recorder that can be shared for separate recording and playback, and is also capable of HiFi playback.

[Brief explanation of drawings]

Figure 1 is a plan view of the rotating drum, Figure 2 is a layout development diagram showing the position of each head on the rotating drum in Figure 1, and Figures 3 (A) and (B) are tracks of the Y@C separate recording system. FIG. 4 is a diagram showing a pattern diagram and a part thereof enlarged. FIG. 4 is a diagram of a track pattern in standard mode, and FIG. 5 is a diagram of a track pattern in long-time mode. 1...Rotating drum, 2.3...Standard mode video head, 4.5...
Video head for long time mode, 6.7... Audio head, 8... Magnetic tape, 10.11... Y track, 12.13... C track, 18.20... Standard mode Video track, 19.
21...Audio deep recording track in standard mode, 22.24...Video track in long time mode, 23
．． 25... Audio deep recording track in long-time mode - Figure 1 Figure 2 Figure 3 (B) FS4 Figure Figure 5

Claims (1)

[Claims] 1. In a magnetic recording system in which a standard mode video head and a long mode video head attached to a rotating drum are used as Y signal and C signal heads, the audio head is attached to the The audio head is installed at a position having a predetermined lead angle and height with respect to the standard mode and long mode video heads, and deep records audio signals in advance of the tracks where video signals are to be recorded. A deep recording method for audio signals. 2. The leading angle is NTS in component recording.
2. The deep recording method for audio signals according to claim 1, wherein for a C signal, the angle is set to 332° or more and 360° or less. 3. The leading angle is PAL in component recording.
2. The deep recording method for audio signals according to claim 1, wherein the angle of the signal is set to 314° or more and 360° or less.