JPH01173301A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To eliminate the need for a flying erase head, etc., and to realize a low cost by deleting the pre-recording signal of a consecutive recording part with the cooperation of a recording and reproducing head and a HIFI head for depth recording. CONSTITUTION:On a revolving drum 1, a HIFI head 13 of a CH 1 and a HIFI head 14 of a CH 2 are arranged so as to delete the pre-recording signal of the consecutive recording part by the cooperation with recording and reproducing heads 2 and 3. Recording is executed on a magnetic tape 4 in a 48mum width with an SP mode by the heads 2 and 3 and the depth record is recorded in the 26mum width by the HIFI heads 13 and 14. Accordingly, when a deleting signal is recorded in the remaining part by an EP head, the most part of the SP record can be deleted and without a special device such as the flying erase head, etc., the consecutive recording part can be deleted without fail.

Description

[Detailed Description of the Invention] [Industrial Application Field 1] This invention records and reproduces a magnetic tape in a tape cassette by drawing it out and winding it around a rotating drum containing a single-rotation magnetic head. The present invention relates to a magnetic recording/reproducing device.

[Prior Art] Fig. 3 is a schematic diagram of the main parts of a conventional magnetic recording/reproducing device, in which (1) is a rotating drum, and (2) is a C.
The recording/reproducing head that also serves as the SP head of Hl and the EP head of cH2, (3) is the SP head of C-H2 and the E of CHI.
A recording/reproducing head (4) which also serves as a P head is a magnetic tape, and this magnetic tape (4) is wound between a supply reel (5) and a take-up reel (6) in a tape cassette (11). There is. (12), (12) are movable tape guides that pull out the magnetic tape (4) from the tape cassette (11) and wind it around the rotating drum (1). (7) is a full-width erase head, and (8) is a fly-in erase head.

Figure 4 (a) shows the magnetic tape (4) at the start of splicing.
FIG. 4(b) shows the track state of the magnetic tape (4) at the end of splicing, and (9) in the figure shows the running direction of the magnetic tape (4).

Next, the operation of the above configuration will be explained.

Figure 4 shows the state of the magnetic tape (4) at the start of recording (
In a), the white tape track (Ta) is the old recorded part, the shaded tape track (Tb) is the new recorded part, and the white tape track (Ta) and the shaded track (Tb) are different. The recording/playback head (2
), an erasure signal is recorded by the flying erase head (8), so the old recording is erased and only the new recording remains, resulting in continuous shooting as shown in FIG. 2(b).

[Problems to be Solved by the Invention] Since the conventional magnetic recording/reproducing device is configured as described above, it is necessary to add another head called a flying erase head just for connection operation, and this It is also necessary to include a drive circuit and a regeneration circuit, which has the disadvantage that the entire device becomes expensive.

This invention was made to solve the above-mentioned problems, and it provides a magnetic recording and reproducing system that can effectively utilize the head provided for recording and reproducing to ensure erasing of previously recorded signals. The purpose is to provide equipment.

[Means for Solving the Problems] The magnetic recording and reproducing apparatus according to the present invention erases the previously recorded signal at the joint portion during continuous shooting by cooperation between the recording and reproducing head and the high-fidelity head for deep recording. It is characterized by having been configured.

[Operation] According to the present invention, the previously recorded signal of SP recording can be erased by the cooperation of the high-fidelity head for deep recording and the recording/reproducing head, so that it does not interfere with the continuous shooting signal.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described based on the drawings.

FIG. 1 is a schematic diagram of the main parts of a magnetic recording and reproducing apparatus according to an embodiment of the present invention. In the figure, the same reference numerals as in FIG. 3 indicate the same or equivalent parts. Therefore, their detailed explanation will be omitted.

In Figure 1, (13) is the CHI hi-fi head, (14) is the CH2 hi-fi head, which is attached to the rotating drum ('l), and the recording and reproducing heads (2) and (3).
It is arranged so as to cooperate with the camera to erase the previously recorded signal of the spliced portion.

(a) in FIG. 2 shows the trajectory on the tape by the SP head, (b) in FIG. 2 shows the trajectory by the hi-fi head, and (C) in FIG. 2 shows the trajectory by the EP head.

Next, the operation of the above configuration will be explained.

In a magnetic recording/reproducing apparatus equipped with high-fidelity heads (13) and (14) as shown in FIG.
The locus on the tape recorded in the SP mode according to 2) and (3) is recorded with a width of 48 JLm as shown in (a) in FIG. Also, the hi-fi head (13).

The deep recording according to (14) has a width of 26 pm and is recorded at a position 19.8 pm from one end of the trajectory on the tape of the recording/reproducing heads (2) and (3) in the SP mode.

As shown in FIG. 1, the high-fidelity head is located 180 degrees from the recording/reproducing head in the SP mode, and the head height is 58.5 pm, so the high-fidelity head is at the above position. As shown in (b) in Figure 2, if the EP head records an erase signal in the remaining 19.8 m @ area after erasing the SP record in a width of 26 μm, most of the SP record will be erased. 4, so that there is no interference with the continuous footage.

[Effects of the Invention] As described above, according to the present invention, a previously recorded signal can be erased by cooperation between the video signal recording/reproducing head and the high-fidelity head for deep recording, which are originally provided in this type of device. This allows you to improve the image quality of the spliced portion. In this way, it is possible to effectively utilize the recording/playback head to reliably erase the joints during continuous shooting, eliminating the need for a special head such as a flying erase head and the associated circuitry required in conventional devices. This has the effect of making it possible to perform good continuous shooting while configuring the entire device at a low cost.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of the main parts of a magnetic recording and reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a tape pattern diagram explaining the operation of the embodiment, and FIG. 3 is a main part of a conventional magnetic recording and reproducing apparatus. FIG. 4 is an explanatory diagram of a conventional continuous shooting operation. (1) Rotating drum, (2), (3) Recording and reproducing head, (4) Magnetic tape, (11) Tape cassette, (12) Movable tape guide , (1
3), (14)...Hi-fi head. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] (1) Magnetic recording and reproducing comprising a recording/reproducing head, a full-width erasing head, a rotating drum containing the recording/reproducing head, and a movable tape guide that pulls out a magnetic tape from a tape cassette and winds it around the rotating drum. In the device,
A magnetic recording and reproducing apparatus characterized in that a high-fidelity head for deep recording is mounted on the rotating drum and arranged so as to cooperate with the recording and reproducing head to erase the portion that has not been erased by the full-width erasing head.