JPH0683422B2 - Information playback device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an information reproducing apparatus using a belt-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 separately recorded from the head into different areas of the magnetic tape, and at the time of reproducing, the magnetic tape is wound around the head drum as described above. A helical scan PCM audio VTR that reproduces audio and video signals by scanning each area with a head has already been proposed.

By the way, in the case of continuous running reproduction of the magnetic tape recorded in the areas where the video signal and the audio signal are different as described above, it is necessary to scan each area with a head, but in the case of special reproduction such as still reproduction. However, even though it is not necessary to take out the audio signal, both areas are scanned in the same manner as described above, and the audio signal area which is not necessary for reproduction is deteriorated.

〔Purpose〕

The present invention has been made in view of the above problems, and can prevent unnecessary scanning of an audio signal area and prevent deterioration of audio information in a special reproduction mode such as a medium stop reproduction mode. It is an object of the present invention to provide an information reproducing device that can be used.

〔Example〕

An example of applying the present invention to a PCM audio signal VTR will be described below as an embodiment of the present invention with reference to FIG.

In the figure, 1 is a magnetic tape supply reel for supplying a magnetic tape t as a recording medium, 2 is a magnetic tape take-up reel for winding the magnetic tape t supplied from the magnetic tape supply reel 1, 3 is a head drum, and 4 is a head drum. The recording / reproducing head provided on the head drum 3 is the head drum 3
A recording / reproducing means A is constructed together with another recording / reproducing head (not shown). 5 and 6 are magnetic tape supply reels 1
There are two tape guide posts as guide means for guiding the magnetic tape t supplied from the above so as to run along the outer periphery of the head drum 3. Of the guide posts 5 and 6, the guide post 5 on the left side is described later. It is moved in the left-right direction by the guide post drive device 7 as the control means, and the set position is variable. Reference numerals 8 and 9 are guide rollers for guiding the traveling of the magnetic tape t between the tape guide posts 5 and 6 and the magnetic tape supply reel 1 and the magnetic tape take-up reel 2. 10 is a mode setting device as a mode setting means for selectively selectively setting a recording mode, a still reproduction mode, a normal reproduction mode, etc., and 11 is this mode setting device 10
Is a mode detection device for detecting the mode set by the above, and the guide post drive device 7 appropriately moves the tape guide posts 5 and 6 to the left and right sides according to the output from the detection device 11. In addition, 12 is a rotation detector that detects the rotation of the reel base on the magnetic tape supply reel 1 side, 13 is a rotation detector that detects the rotation of the reel base on the magnetic tape take-up reel 2 side, and 14 is the rotation of the guide roller 9. Of the rotation detectors 12, 13 and 14 are input to the mode detection device 11.

In the VTR having the above configuration, when the mode setting device 10 sets the recording mode, the mode detection device 11 detects this and outputs a signal according to this mode to the guide post drive device 7. This drive device 7 moves the tape guide post 5 to the position shown by the solid line, and winds the magnetic tape t so that the winding angle around the head drum 3 becomes approximately 220 °, whereby the magnetic tape t and the recording / reproducing head 4 are connected. Contact. Then, the magnetic tape t is run to record the audio signal and the video signal.

When performing reproduction in a special mode, for example, still reproduction, the mode setting device 10 is set to the still reproduction mode. As a result, the guide post drive device 7 is operated through the mode detection device 11 to move the tape guide post 5 to the position indicated by the alternate long and short dash line. As a result, the winding angle of the magnetic tape t becomes slightly more than 180 °, and the audio area of the magnetic tape and the recording / reproducing head 4 are brought into non-contact with each other. Therefore, the audio area of the magnetic tape t for stale reproduction (tape is stop) is not scanned, and only the necessary video signal is taken out.

In the case of performing normal reproduction, the mode setting device 10 sets the normal reproduction mode to move the tape guide post 5 to the same position as in the recording mode and reproduce the video signal and audio signal. .

In the above description, the still reproduction mode is taken as an example of the special reproduction mode, but not limited to the still reproduction mode, other special reproduction modes such as slow motion reproduction, which are unsuitable for reproduction of audio signals, are used. The invention is applicable.

〔effect〕

As described above, according to the information reproducing apparatus of the present invention, it is possible to prevent unnecessary scanning of the audio signal area as in the conventional case in the special reproduction mode, and prevent deterioration of audio information. The effect is that you can do it.

[Brief description of 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 post as guide means 7 ... Guide post driving device as control means 10 ... Mode setting device as mode setting means

Claims (1)

[Claims] 1. An information reproducing apparatus for reproducing video information and audio information recorded in different areas of a band-shaped recording medium, which is rotatably provided on a drum and scans the area to record on the band-shaped recording medium. A rotary head capable of reproducing the recorded video information and audio information, and a movably provided winding of the band-shaped recording medium around the drum at a predetermined angle and guiding the band-shaped recording medium to run along the drum. The guide means, at least the normal reproduction mode and the mode setting means capable of setting the special reproduction mode in which the audio information is not reproduced, and the special reproduction mode set by the mode setting means. An area in which audio information of the recording medium is recorded is a region where the rotary head scans with a small winding angle. An information reproducing apparatus comprising: a control unit that moves the guiding unit so that the area is a region where video information other than is recorded.