JPS61126880A - Information regenerating device - Google Patents

Abstract

PURPOSE:To prevent the unnecessary scanning of a recording medium and to reduce the deterioration in the record medium at a special regeneration mode by responding to the mode setting means to control a guidance means and by changing a positional relation against the regeneration means of the recording medium. CONSTITUTION:When the recording mode is set, a mode detector 11 detects it, and a signal corresponding to it is outputted to a guide post driving device 7. In case of performing a special mode regeneration, a mode setting device 10 is set on a still regeneration mode, the guide post drive device 7 is actuated through the mode detector 11 to move a tape guide post 5. Thus, the wound angle of a magnetic tape (t) becomes enough 180 deg., and the audio area of the magnetic tape and a record regeneration head 4 falls in non-contact condition. Therefore, the audio area of the magnetic tape (t) isn't scanned, and only the necessary video signal is taken out. Thus, the prevention of the unnecessary recording medium from scanning and the prevention of the deterioration of the recording medium can be achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an information reproducing apparatus that uses a strip-shaped recording medium, such as a VTR.

[Prior art]

A magnetic tape is wound around a head drum having a recording/reproducing head, and a PCM audio signal and a video signal are divided and recorded from the head into different areas of the magnetic tape, and during reproduction, the magnetic tape is wound around the head drum in the same manner as above. A helical scan PCM audio VTR has already been proposed in which audio and video signals are reproduced by winding the tape and scanning each area with a head.

By the way, when playing a magnetic tape in which video signals and audio signals are recorded in different areas in a continuous manner, it is necessary to scan each IJ with a head, but special playback methods such as static playback, etc. In Case of,
Even though there is no need to extract the audio signal, both areas are scanned in the same way as described above, and there is a problem in that the audio signal area that is not necessary for reproduction deteriorates.

〔the purpose〕

This invention has been made by focusing on the above-mentioned problem, and can prevent the recording medium from being unnecessarily scanned during special playback mode such as medium stop playback mode, and can alleviate the deterioration of the recording medium. The purpose is to provide an information reproducing device.

〔Example〕

An example in which the present invention is applied to a PCM audio VTR will be described below with reference to FIG. 1 as an embodiment of the present invention.

In the figure, 1 is a magnetic tape supply reel that supplies a magnetic tape t as a recording medium, 2 is a magnetic tape take-up reel that winds the magnetic tape t supplied from this magnetic tape supply reel 1, 3 is a head drum, and 4 is a recording/reproducing head provided on this head drum 3;
It constitutes a recording/reproducing means A together with other recording/reproducing heads (not shown). Reference numeral 5.6 denotes two tape guide posts serving as guide means for guiding the magnetic tape t supplied from the magnetic tape supply reel 1 so that it travels along the outer periphery of the head drum 3. Among these guide posts 5.6, The left guide post 5 is moved in the left-right direction by a guide post drive device 7 as a control means, which will be described later, and its setting position is variable. Reference numeral 8.9 denotes guide rollers that guide the running of the magnetic tape t between the tape guide posts 5 and 6 and the magnetic tape supply reel 1 and magnetic tape take-up reel 2. Reference numeral 10 denotes a mode setting device as a mode setting means for selectively setting recording mode, static reproduction mode, normal reproduction mode, etc. as appropriate. Reference numeral 11 denotes a mode detection device for detecting the mode set by this mode setting device 10. Depending on the output from this detection device 11, the guide post driving device 7 moves the tape guide post 5.6 as appropriate.
to the left and right. Note that 12 is a rotation detector that detects the rotation of the reel stand on the side of the magnetic tape supply reel 1, 13 is a rotation detector that detects the rotation of the reel stand on the side of the magnetic tape take-up reel 2, and 14 is the rotation of the guide roller 9. The outputs of these rotation detectors 12, 13, and 14 are input to the mode detection device 11.

In the VTR having the above configuration, the mode setting device 1
When the recording mode is set to 0, the mode detection device 11
detects this and outputs a signal corresponding to this mode to the guide post drive device 7. This drive device T moves the tape guide post 5t to the position shown by the solid line, and wraps the magnetic tape t around the head drum 3 so that the angle is approximately 220 degrees, thereby connecting the magnetic tape t and the recording/reproducing head. 4. Thereafter, the magnetic tape t is run to record audio and video signals.

Further, when performing reproduction in a special mode, for example, still reproduction, the mode setting device 10 is set to still reproduction mode. This activates the guide post drive device 7 through the mode detection device 11, and moves the tape guide post 5 to the position shown by the dashed line. As a result, the winding angle of the magnetic tape t is more than 1800, and the audio area of the magnetic tape and the recording/reproducing head 4 are in a non-contact state. Therefore, the audio area of the magnetic tape t is not scanned, and only the necessary video signal is extracted, which is still playback (tape is 5 top).

In addition, when performing normal playback, by setting the normal playback mode with the mode setting device 10, the tape guide post 5 moves to the same position as in the above-mentioned recording mode.
Video and audio signals are played.

In the above description, the still playback mode was used as an example of the special playback mode.

The present invention is applicable not only to the still playback mode but also to other special playback modes, such as slow motion playback, which are unsuitable for audio signal playback.

〔effect〕

As explained above, according to the information reproducing device of the present invention, it is possible to prevent the recording medium from being unnecessarily scanned as in the conventional method during the special reproduction mode, and it is possible to prevent the recording medium from deteriorating. There is an effect.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention. 3...Head drum 4...Recording/reproducing head A...Recording/reproducing mechanism 5.6...Tape guide as guiding means Post 7...Guide post drive device 10 as control means...Mode setting device as mode setting means Fig. 7

Claims (1)

[Claims] variable guide means for guiding the strip-shaped recording medium on which information is recorded to travel along the playback means; mode setting means for setting a special playback mode; 1. An information reproducing apparatus comprising: control means for controlling the means to change the positional relationship of the recording medium with respect to the reproducing means.