JPH0264988A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent the omission or the duplication of an address recorded on a magnetic recording tape by detecting the discontinuous position of the address and eliminating the discontinuity of the address on the tape. CONSTITUTION:When a detecting means detects the first discontinuous position as the start of the discontinuous interval of the address and the second discontinuous position at the end of the discontinuous interval under a reproducing state, a new address is successively recorded from the first discontinuous position to the second discontinuous position by an after recording operation so that the new address can be continuous from the address immediately before the first discontinuous position. Further, when the detecting means detects the discontinuity of the address again after the after recording operation for the discontinuous interval ends, since the after recording operation is executed again, the discontinuous state of the address on the magnetic recording tape is eliminated. Thus, the omission or the duplication of the address can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial application field This invention relates to a magnetic recording/reproducing device (D) having an address recording function.
AT), especially the address recorded on the tape (Abs
The present invention relates to a magnetic recording and reproducing device that can ensure continuity of olute lime.

(b) Prior art/Problems to be solved by the invention Conventionally, in magnetic recording and reproducing devices, the tape running speed varies slightly due to electrical and mechanical variations in the tape drive means, and for this reason, certain magnetic recording When a tape recorded by one main device is overwritten by another magnetic recording and reproducing device, one address is lost at the boundary between the end of the new recording section and the original recording section due to the speed difference between the two magnetic recording and reproducing devices.

Alternatively, when address duplication occurs and positioning control is performed by specifying the address, there is a drawback that the target position cannot be found or malfunction occurs.

FIG. 4 is a diagram schematically showing the discontinuity of addresses on the magnetic recording tape due to the above-mentioned missing or duplicated addresses.

This invention was made in view of the above points, and its purpose is to ensure the continuity of addresses on a magnetic recording tape, and to create a magnetic recording tape that does not cause address dropouts or address duplication even when overwritten. The purpose of the present invention is to provide a recording/playback device.

(c) Means to solve the problem FIG. 1 is a functional block diagram showing the configuration of the present invention.

A magnetic recording and reproducing apparatus of the present invention is a magnetic recording and reproducing apparatus having an address recording function, and is provided with a detection means for detecting discontinuous positions of addresses recorded on a magnetic recording tape, and in a reproducing state, the detection means detects discontinuous positions of addresses. When the first discontinuous position that is the start of a continuous section and the second discontinuous position that is the end of the discontinuous section are detected, the first discontinuous position The arrangement is such that different addresses are sequentially recorded from a position to a second discontinuous position by an after-recording operation to eliminate discontinuity of addresses on the magnetic recording tape.

(d) Effect The operation of this invention will be explained using FIG.

According to the magnetic recording and reproducing apparatus of the present invention, a detecting means for detecting a discontinuous position of addresses recorded on a magnetic recording tape is provided, and in a reproducing state, the detecting means detects a first position at the beginning of a discontinuous section of addresses. When detecting the discontinuous position and the second discontinuous position which is the end of the discontinuous section, the first
Following the address immediately before the discontinuous position, the address of the person is sequentially recorded from the first discontinuous position to the second discontinuous position by the dubbing operation, and after the dubbing operation of the discontinuous section is completed, the detecting means returns to the address immediately before the discontinuous position. When detecting address discontinuity, the dubbing operation is performed again, so that the address discontinuity on the magnetic recording tape is eliminated.

(E) Embodiment An embodiment of the magnetic recording/reproducing apparatus according to the present invention will be described with reference to FIGS. 1 to 3.

In the figure, 1 is a magnetic recording tape (hereinafter referred to as tape), 2
．． 3 is tape! 4 is a motor driver for driving the motor or capstan (both not shown) of reel 2.3; 5 is a motor driver for recording signals on tape L and reproducing signals on tape L; 6 is a recording and reproducing device that supplies signals to the head 5 and reads signals from the head 5; 7 is a microcomputer that controls the motor driver 4 and the recording and reproducing device 6; A central processing unit that performs arithmetic processing, a ROM that stores programs to be executed, and an RA that stores data.
It consists of M and a human output port. Then, via the recording/reproducing device 6.

All information signals 7a to be recorded or reproduced are processed by the microcomputer 7.

Next, the operation of the magnetic recording/reproducing apparatus of the present invention will be explained based on the flowchart of FIG.

In this embodiment, "r address" indicates "Absolute time J" used in DAT.

Also, the state of discontinuous addresses is Absolute Li
It is assumed that me indicates a non-continuous state, and that the boundary between the recorded portion and the non-recorded portion also has discontinuous addresses.

First, this magnetic recording and reproducing device is put into a reproducing state (step S1), and a discontinuous state of addresses is detected (step S2).
). If the playback of the recorded portion is completed without detecting the address discontinuity state (step S3), there is no abnormality in the recording state of the address of the tape currently being played back, and this program is terminated. When a discontinuity point is detected, this position is stored in the RAM of the microcomputer 7 as a "discontinuity start position" (step S4). Furthermore, when the reproducing state is continued and a discontinuous point of addresses is detected again (step S5), this position is stored in the RAM of the microcomputer 7 as a "discontinuous end position" (step S6).
).

In this way, when one discontinuous section of addresses is defined, the playback operation is interrupted and a rewinding state is established (step sy).
rewind to "r discontinuity start position" (step S8.39
), the dubbing operation is started here, and the address rewriting operation is started (step 510). In the dubbing operation,
Based on the address information immediately before discontinuity, consecutive addresses are sequentially recorded in this address information. Then, when this dubbing operation passes the "discontinuous end position" (step Sl
+ ), the dubbing operation is ended (step 512).
. If the “discontinuous end position ia” is the boundary between the recorded portion and the non-recorded portion, this operation is terminated (step 513).
However, when the "discontinuity end position" is within the recorded portion, the playback mode is set and the presence or absence of a discontinuity in addresses is checked. Then, when the discontinuous state of addresses is detected again, steps S1 to S13 are repeatedly executed. In this way, the dubbing operation is performed for all parts from the beginning of tape 5 to the end of recording 1-2 until there are no discontinuous addresses.

(F) Effects of the Invention According to the magnetic recording apparatus according to the present invention, which is constructed as described above, it is possible to eliminate discontinuity of addresses on the magnetic recording tape.

Therefore, even when positioning control is performed by specifying an address, control failures such as the first movement can be prevented.

Moreover, the structure is simple! It has excellent features such as being able to be constructed at low cost and being easy to implement.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the magnetic recording IIi generation device according to the present invention, where Figure 1 is a functional block diagram, Figure 2 is a hardware block diagram, and Figure 3 is a flowchart. . FIG. 4 is a diagram schematically showing a discontinuous state of addresses on a magnetic recording tape 1- according to a conventional embodiment. Explanation of main symbols 1: Magnetic recording tape 2, 3: Reel 4: Motor driver 5; Head (S; Recording 111 student 21 7: Microcomputer Patent applicant Kenwood Co., Ltd. Figure 1 Figure 4 Figure 2 ■ II on the child block

Claims (1)

[Scope of Claims] A magnetic recording and reproducing device having an address recording function is provided with a detection means for detecting discontinuous positions of addresses recorded on a magnetic recording tape, and in a reproducing state, the detection means detects a discontinuous section of addresses. When the first discontinuous position, which is the start, and the second discontinuous position, which is the end of the discontinuous section, are detected, following the address immediately before the first discontinuous position, 1. A magnetic recording and reproducing apparatus characterized in that the magnetic recording and reproducing apparatus is configured to sequentially record new addresses up to two discontinuous positions by an after-recording operation, thereby eliminating discontinuity of addresses on a magnetic recording tape.