JPH0370286A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To obtain a video without noise when the signal is reproduced at a standard speed by providing a step to rotary heads located opposite to each other. CONSTITUTION:A step is given to head positions by a video track width W relatively. Thus, when a rotary head a3 finishes the reproduction of a video signal V1, a rotary head b4 is located at a reproduction start point (a) of a compression audio signal A1 in the absence of the step, but the head b4 is located at a point a' because the step is provided. When a signal V2 is reproduced and finished, the rotary head a3 is placed at a point (b) and the signal V2 is reproduced. When the operation above is repeated, only video signals of V1, V2,...Vn, Vn... are reproduced and outputted. Thus, the video image without noise is outputted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a head configuration of a rotary head in a magnetic recording/reproducing device.

[Conventional technology]

The video signal is recorded on a predetermined track of a magnetic tape by a rotating video head for one field every plural fields, and the video signal for one field is reproduced from the magnetic tape. While extracting this individually or continuously as 1 frame of 2:1 interlaced video...
...Magnetic recording and reproducing device. They were yelling. Related devices of this type include, for example, Ringma 61-237.
Publication No. 205 and the like can be mentioned.

[Problem to be solved by the invention]

The above conventional technology processes one field of video signal and performs two steps:
There is a problem in that the circuit becomes complicated due to the use of one frame of video with one interlace. The present invention aims to easily supply reproduced images. The problems encountered when playing back without special processing will be explained below.

FIG. 2 is a developed view of a conventional rotary head, and the heights of the opposing heads are located on the same plane. FIG. 3 shows how video signals and compressed audio are recorded on a magnetic medium.

vl...Vn indicates a video signal, and A□...An indicates a compressed audio signal. Rotating head a1 is the video signal ■
, the rotary head b2 outputs the compressed audio signal A.
It is located at the reproduction start point α of No. 1. Therefore, if the reproduction continues as it is, the compressed audio signal A1 will be reproduced. Since this is continuous, Vl is applied to the video signal output.

The video signal and the compressed audio signal are alternately output as A, , V, , A, . . . Vn, An . When this is input to a monitor TV, the An part becomes noise and the screen becomes very difficult to see.

An object of the present invention is to reproduce only the video signal when reproducing a magnetic recording medium on which video signals and compressed audio signals are alternately recorded.

[Means to solve the problem]

In order to achieve the above object, a step is provided between the rotating heads.

[Effect]

By providing a step between the opposing heads, only the video signal can be played back, making it possible to provide a noise-free screen.

Note that, as an alternative, a method using a video memory may be considered. This means that before playing the video signal V, the V is stored in the video memory, and when playing the compressed audio signal A1 part, it is switched to the video memory output and outputs V□, and as a result, Vl, V□ .

V2. This is a method of outputting video signals such as vl...Vn, Vn...

However, compared to the real method, this method requires the addition of a memory circuit, etc., and is disadvantageous in terms of cost.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. The head positions, which were conventionally on the same surface, are relatively stepped by the video track width W.

Looking at the movement of the head in such a case in Fig. 3, when the rotary head cL3 finishes reproducing the video signal vl, the rotary head b4 is located at the reproduction start point α of the compressed audio signal A, if there is no 5 step difference. , since there is a step, it will be located at point a'. In other words, the signal of (2) is reproduced, and when that is finished, the rotary head α3 is positioned at point 6, and the signal (2) can be reproduced. If you repeat this, the video output will be Vt V2? Only the video signal is reproduced and outputted as follows: Lt...Vn, Vn...

According to this embodiment, there is an effect that a noise-free image can be output.

〔Effect of the invention〕

According to the present invention, it is possible to provide noise-free images when reproduced at standard speed with a magnetic recording and reproducing device that can alternately record images and compressed audio.

[Brief explanation of drawings]

FIG. 1 is an exploded view of the head configuration of the present invention, FIG. 2 is an expanded view of the head configuration of the prior art, and FIG. 3 is a diagram of a recording pattern on a magnetic recording medium. 1...! Rotating head α, 2...Rotating head b, 3...
- Rotating head α, 4...Rotating head b. 2 mouths

Claims (1)

[Claims] 1. For recording and reproducing in a magnetic recording and reproducing device comprising means for recording video signals at intervals corresponding to the fixed time while feeding a fixed amount of magnetic recording medium at fixed time intervals, and means for recording audio as a time-axis compressed signal. A magnetic recording and reproducing device capable of recording and reproducing compressed audio, characterized in that, in the related rotary heads, a step is provided between opposing heads.