JPH0354770A - Multiplex video recorder - Google Patents

Abstract

PURPOSE:To enable the video and sound recording for a long time by performing a video and sound recording in a small area, carrying out other video and sound recording in the remaining area, providing them with control pitch signals respectively which are different from each other and discriminating them at the reproducing time. CONSTITUTION:First, when a nonrecorded VHS tape is put in a VHS system video tape recorder and a track 1 is specified, only the track 1 is recorded leaving a blank space of track parts 2 and 3, and since fixed heads for recording previously the control signal are disposed in due order of tacks 1-3, the track 2 next to the track 1 is preferentially recorded, and a program can be selected by specifying a track at the reproducing time. By this method, the video recording and reproducing can be carried out three times longer, and higher picture quality than the conventional treble mode can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video tape recorder that magnetically records video and audio on a tape coated with or vapor-deposited with a magnetic material using a rotary head or the like.

[Conventional technology]

In addition to the basic tape running speed, conventional video tape recorders were equipped with a long-duration mode that slowed down the tape speed for long-term recording.

[Problems to be solved by the invention] In the long-time mode of the conventional video tape recorder as described above, the image quality deteriorates significantly, and because the tape speed is slow, the screen shakes and flickers are noticeable, and the per-screen area decreases. The damage rate was large and caused dropouts.

[Means for solving the problem] To give a concrete explanation using the VHS system as an example as a means for solving the above problem, the VHS system uses a track pitch of 0.058 mm in standard mode. ,this! This standard mode, which records on the entire 0.058mm track and records one control signal for each track so that it can be distinguished from other tracks, is divided into three equal parts: 1 track, 2 track, and 3 track. divided into 0 019
mm each, and record 4, 5, 6, and 3 types of control signals on each 1 track, 2 track, and 3 track,
If you specify the control signal 4 first, the control signals 5 and 6 will be skipped and recording will be made only on the one track where the control signal 4 is located. Tracks 2 and 3 will be the same as the track l. Record by the method of
At this time, put the audio of l in the normal audio track,
Maintaining compatibility with conventional VHS standard mode, 2, 3,
The audio track is recorded only on the high-fidelity audio track, and the tape speed is 33.4 m in the conventional VHS standard mode.
It is the same as m/S, but has three times the recording time in total for the three tracks 1, 2, and 3.

[Function] This invention has the above-mentioned configuration, and when an unrecorded VHS tape is first inserted into a VHS video tape recorder and track 1 is specified, tracks 2 and 3 are left blank and recording is performed on only one track. However, since the fixed head that records control signals in advance is arranged in the order of tracks 1, 2, and 3, track 2 is recorded with priority after track ①, and during playback, track This allows you to select a program by specifying it.

[Example] In the figure, 1, 2, and 3 are VHS video and high-fidelity audio tracks each having a track width of 0.019 mm, 4 is a control signal for detecting track I, and 5 is a track 2. control signal to detect,
6 is a control signal that detects the track 3. The control signals 5 and 6 are recorded at a different position from the conventional control signal recording position, and in the conventional machine, only the control signal 4 is detected, and 7 is the normal audio track. 1 corresponds to the video and maintains compatibility with the conventional normal audio track dedicated video, 8 is the video tape, and 9 is the control signal track.

[Effects] This invention can record and play back three times as long as the tape running speed of the basic design, maintain almost the same image quality as the basic design, and save 33% of the tape storage space and tape costs compared to conventional tapes. In addition, it is possible to obtain a significantly higher image quality than the conventional 3x mode.

[Brief explanation of drawings]

The drawing shows the recording pattern of each signal on the tape.

Claims (1)

[Claims] In video tape recorders such as VHS system [registered trademark] and Beta system [registered trademark] currently on the market, the area is smaller than the basic design and is a fraction of the area at the tape running speed of the basic design. This is done by recording another recording in the remaining area, providing a different control pitch signal for each recording, and making it possible to identify the specified control pitch signal during recording playback. A recording and recording device that enables recording for a longer time than the basic design recording time at tape running speeds.