JPH03150701A - Video tape recorder - Google Patents

Abstract

PURPOSE:To record and reproduce the video signals for a stereoscopic screen by supporting plural video heads on the circumferential surface of a cylinder around which a video tape is wound with a shift of winding pitch larger than the tape width to simultaneously record and reproduce the video signals. CONSTITUTION:A video tape 8 driven to a take-up reel 7 from a feed reel 6 is wound round a cylinder 9 with a shift of winding pitch larger than the tape width. A 1st video head 11 and a 2nd video head 12 are provided side by side at the edge part of head disk 10 stored in the cylinder 9. Then the disk 10 is rotated by a disk motor 13. At the same time, the cylinder 9 itself forms a gap through which the contacts are secured between the tape 8 and both heads 11 and 12 respectively when these heads are moved with rotation.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a video tape recorder (hereinafter referred to as a VTR) that records and plays back video signals on a videotape, and particularly relates to a video tape recorder (hereinafter referred to as a VTR) that is used in combination with a stereoscopic viewing device. This invention relates to improvements to VTRs used in the field.

(Prior Art) Conventionally, when recording video signals of a plurality of channels on a VTR, a plurality of VTRs have been used. As shown in FIG. 4, the first camera 1 for right eye viewing and the second camera 2 for left eye viewing are synchronously controlled by the camera controller 3, and the first camera 1 and the second camera 2, the system captures the image of the object 5 by capturing the video signals of the stone statue and the left image into the stereoscopic viewing device 4, and alternately displays the stone statue and the left image on the stereoscopic viewing device 4, thereby making it possible to view the object 5 stereoscopically. In the configuration, when recording/playing back two-channel video signals showing images alternately displayed on the stereoscopic viewing device 4,
Two VTRs were used.

(Problem to be Solved by the Invention) However, when recording/playing back two-channel video signals for stereoscopic viewing using two VTRs, by playing back the two-channel video signals in synchronization, In this case, there was a problem in that the recording system for recording/reproducing was complicated and large-scale.

Although it is possible to record and play back two-channel video signals for stereoscopic viewing with one VTR, one field of video information shot with two fields per frame must be discarded, and the display The vertical resolution of the image will deteriorate.

The present invention has been made in view of the above circumstances, and its purpose is to record/record video signals for stereoscopic viewing with a single device without degrading the vertical resolution of displayed images.
The object of the present invention is to provide a simple IR-configured VTR capable of playback.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a method for winding a videotape that is moved from a supply side to a winding side with a deviation of more than the tape width of the videotape. A cylinder that can be wound with a pitch,
The cylinder is equipped with a plurality of video heads that can simultaneously perform recording and reproducing operations on the circumferential surface of the cylinder, and a head support section that supports the plurality of video heads. It is characterized by recording and reproducing signals simultaneously.

(Function) With the configuration according to the present invention, multiple video heads on a cylinder simultaneously record and reproduce video signals of multiple channels on one videotape. It is possible to synchronously reproduce video signals of multiple channels from a videotape. Therefore, it is possible to reproduce a video signal and display a stereoscopic image without dropping half of the video information from the two-channel video signal for stereoscopic viewing.

(Embodiment) FIG. 1 is a block diagram showing the main parts of a VTR according to an embodiment to which the present invention is applied.

The VTR of this embodiment includes a cylinder 9 on which a video tape 8 moved from a supply reel 6 to a take-up reel 7 is wound at a winding pitch that is deviated by more than the tape width. Inside the cylinder 9, as shown in FIG.
video heads 12 are arranged side by side, and the head disk 1
0 is configured to be rotationally driven by a disk motor 13. On the other hand, the inner body of the cylinder 9 has a gap (not shown) in which the video tape 8 can come into contact with the first and second video heads 11 and 12 when the first and second video heads 11 and 12 rotate. It is what forms the. In addition, the first
In the figure, 14 is a guide ball, 15 is a capstan, and 16 is a pinch roller.

In one embodiment including the above-mentioned parts, the video tape 8 is wound from the supply reel 6 through the guide pole 14 onto the cylinder 9, and is further fed by the capstan 15 and the pinch roller 16 to the take-up reel. It is wound up at 7.

In the process of moving the video tape 8, recording and reproducing operations are performed by the first and second video heads 11, 12 on the head disk 10 while the cylinder 9 is moving around the cylinder 9.

FIG. 3 is a state diagram schematically showing the tape pattern of the video tape 8 when recording and reproducing operations are performed by the first and second video heads 11 and 12.

To explain the operation during recording and playback according to this figure 3,
While recording a signal indicating the start of a frame of a video signal on the control track 17 by a control head (not shown), the video head 11 shown in FIGS. 1 and 2 records the video signal of the first channel on the first video track 18. and at the same time record the second data shown in Figures 1 and 2.
The video head 12 records the video signal of the second channel on the second video track 19. Therefore, the first video track 18 and the second video track 19 record video signals alternately. Furthermore, during playback, a two-channel video signal can be obtained by simply positioning the control track 17. In FIG. 3, reference numeral 20 denotes an audio track, and audio signals are recorded and played back on this audio track 20 by an audio head (not shown).

As described above, according to this embodiment, two channels of video signals can be simultaneously recorded on one videotape, and the two channels of video signals can be played back as they are recorded. Rotating head type VTR
Since this has been realized, recording and playback for stereoscopic viewing can be performed with a single VTR without degrading the vertical resolution of the displayed image.

Note that the VTR of the above-mentioned embodiment has two
It records and plays back the channel video signal.
The present invention is not limited thereto, and even if the number of input video signal channels is other than two, the number of video heads may be equal to the number of channels. In addition, in the VTR of the above-mentioned embodiment, the video heads for the number of channels are arranged side by side on the same head disk that rotates within the cylinder. Video signals may be recorded and played back on a video tape by rotating a part of the cylinder.

[Effects of the Invention] As explained above, the VTR of the present invention can record multiple channels of video signals on one videotape.
Recording for stereoscopic viewing can be done on the stand.

Furthermore, since all video signals can be synchronously reproduced from the video tape on which the video signals are recorded, the vertical resolution of the displayed image can be maintained well. Further, since recording and reproduction are performed as described above, the number of video tapes may be smaller than that of the conventional method, which provides advantages such as convenience in terms of video tape storage.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing the main parts of a VTR according to an embodiment of the present invention, and FIG. 2 is a perspective view showing the inside of the cylinder.
FIG. 3 is a state diagram schematically showing a tape pattern on a videotape, and FIG. 4 is a block diagram showing a system configuration including a stereoscopic viewing device. 1... 1st camera 2... 2nd camera 3...
- Camera controller 4...Stereoscopic device 5...Subject 6...Supply reel 7...Take-up reel 8...Video tape 9...Cylinder 10...Head disk 11...No. 1 video head 12...2nd video head 13...disc motor 14...guide ball 15...capstan 16
...pinch roller

Claims (1)

[Claims] (1) A cylinder on which the video tape being moved from the supply side to the winding side is wound with a winding pitch that is shifted by the tape width or more, and a plurality of video tapes that can record and play back simultaneously on the circumference of this cylinder. What is claimed is: 1. A video tape recorder comprising: a head; and a head support section that supports the plurality of video heads, and simultaneously records and reproduces video signals of a plurality of channels on the video tape using the plurality of video heads.