JPH01113943A - Program search reproducing device - Google Patents

Abstract

PURPOSE:To always execute a program search reproducing at a constant position by executing the detecting operation of a program searching signal at the time of a reproducing mode after the program searching signal is once over-run by brake delay. CONSTITUTION:A system controller 1 controls a tape traveling part 3 through a control part 2 and a mechanical control part 2 is provided with a braking mechanism, which is operated at a program searching time, besides the reproducing mode and a feed back mode. Then, control is executed so as to be operated with being delayed for a constant time after the command of brake operation is received from the system controller 1. In case of a fast forwarding, when the program searching signal is detected, a tape is stopped by the brake delay and after that, a rewinding is executed. Then, when the program searching signal is detected again, the tape is stopped by the brake delay and moved to the reproducing mode. Then, when the program searching signal is detected, a reproducing picture is outputted. On the other hand, in case of the rewinding, when the program searching signal is detected, the tape is stopped by the brake delay and moved to the reproducing mode. Then, when the program searching signal is detected, the reproducing picture is outputted. Thus, the program search reproducing can be executed always at the constant position.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cue playback device and is used in a video tape recorder (VTR).

(Prior art) Conventionally, in a VH3 system (7) VTR, there is a system that records the INDEX signal to cue the beginning, that is, ■IS
S (VHS INDEX 5EARCHSYSTI)
EM) has been proposed. With this system, INDll! during fast forwarding or rewinding! When an X signal is detected, the brakes are applied to tape running at that moment, and the mode is immediately switched to playback mode to output a playback screen.

(Problem to be Solved by the Invention) However, in such conventional systems, the location where the INDEX signal is written and the location of the output playback image do not necessarily match, so the start position of cue playback is not constant. There was a problem. Therefore, in a so-called intro search mode in which fast-forwarding or rewinding is performed while reproducing a portion in which the INDEX signal is written for a certain period of time, there is a problem in that a desired screen is not reproduced. Another problem is that the position of the INDEX signal changes depending on the tape winding hub and the speed of fast forwarding or rewinding, making it difficult to detect.

(Means for Solving the Problems) The cue playback device according to the present invention records a cue signal consisting of a predetermined code at a cue location, detects this cue signal during fast forwarding or rewinding, and detects the cue signal when fast forwarding or rewinding. A device for performing cue playback, comprising: a brake mechanism operable when cueing; means for controlling the operation of the brake mechanism with a delay after detecting the cue signal; and a means for adjusting the recording base end position of the cue signal by a predetermined amount. The apparatus is provided with means for controlling rewinding to an overrun position, and means for detecting the cue signal again after setting the playback mode from this overrun position and then outputting the playback signal.

(Function) After detecting a cue signal during rewinding, the brake mechanism is delayed and controlled to a position where this cue signal can be detected in playback mode. The manner in which this is done differs depending on whether it is fast forwarding or rewinding. In other words, in the case of fast forwarding,
When a cue signal is detected, the program is stopped with a brake delay and then rewinded. Then, when the cueing signal is detected again, the brake is delayed again to stop the vehicle. The camera shifts to the playback mode from this stopped position, and outputs a playback image when a cue signal is detected. On the other hand, in the case of rewinding, when a cue signal is detected, the camera is stopped by a brake delay, and from this stopped position, the mode is shifted to the playback mode, and when a cue signal is detected, a reproduced image is output.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a functional block diagram showing an embodiment of a cue playback device according to the present invention. This example is a case where it is applied to a VTR.

A system controller 1 made up of a microcomputer controls the overall operation of this VTR. This system controller 1 controls a tape running section 3, which is a tape drive system, via a mechanical control section 2, which controls the mechanical mechanisms of the VTR, and also controls a VISS control circuit 4, which controls cue control, to perform INDEX control. This is a command to write and read signals.

The tape running section 3 is drive-controlled to match the write and read control by the VISS control circuit 4. The mechanical control section 2 is equipped with a brake mechanism that operates in playback mode, rewind mode, and when cueing.

This brake mechanism is controlled to operate with a predetermined time delay after receiving a command to operate the brake from the system controller 1. The VISS control circuit 4 writes and detects the INDEX signal in the tape running section 3 in accordance with the commands from the system controller 1. This INDEX signal consists of a predetermined code, and its data length has a length equivalent to several seconds in terms of playback time.

FIGS. 2 and 3 are tape schematic diagrams illustrating the cue playback procedure during fast forwarding and rewinding. On the drawing,
The right end indicates the tape end side.

In FIG. 2, during cue playback during fast forwarding, three running states are continuously operated: fast forward mode running 5, rewinding mode running 6, and playback mode running 7.

First, at 5 o'clock when running in fast forward mode, INDE on the tape
The VISS control circuit 4 detects the X signal. This detection information is input to the system controller 1. In the drawing, the time required to detect this INDEX signal (detection time) is indicated by To. Upon receiving this, the system controller 1 instructs the mechanical control unit 3 to delay the brake so as to stop the vehicle after a time To from the detection point of the INDEX signal. Here, by drive control for (TO+TI) time, the tape is stopped at a stop position 8 that overruns the recorded portion of the INDEX signal in the backward direction. After this,
The rewind mode run 6 is commanded. And VIS
The S control circuit 4 performs IND again at detection time T2 during rewinding.
When the EX signal is detected, the system controller 1 commands a brake delay to stop after a time T3 from the time of detection.Here, by drive control of ('rz +T3), the tape is moved forward from the recorded portion of the INDEX signal. It is stopped at overrun stop position 9. Then,
Next, the regeneration mode running 7 is commanded. In this playback mode, the base end position 10 of the recorded portion of the INDEX signal is
After the detection time T0, the VISS control circuit 4
Detect NDEX signal. Upon receiving this detection information, the system controller 1 controls to output a reproduced image from the base end position 10 after T0 in place of the television image that has been output up to that point.

On the other hand, in the cue playback during rewinding shown in FIG. 3, the rewind mode run 6 and the playback mode run 7 are operated continuously. That is, when the VISS control circuit 4 detects the INDEX signal at 6 in the rewind mode, a brake delay is commanded and the vehicle is stopped at the stop position 9. Then, playback mode running 7 starts from this stop position 9, and a playback image is output from the time when the VISS control circuit 4 detects the INDEX signal.

In addition, in the above-mentioned embodiment, the brake delay causes the I
The time to overrun the recorded part of the NDEX signal is
The stable time required for transitioning from fast forward mode to rewind mode and the stable time required for transitioning from rewind mode to playback mode are set to be longer than that. Also, in this example, VIS
Although the case of the S signal is illustrated, the present invention is not limited to this. Furthermore, the present invention is not limited to VTRs, but can also be applied to audio equipment.

(Effects of the Invention) As described above, according to the present invention, the detection operation of the cue signal is executed in the playback mode after the cue signal has once overrun due to the brake delay, so that the cue signal is always kept at a constant position. You can perform cue playback.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of a cue playback device according to the present invention, Fig. 2 is a tape schematic diagram illustrating the cueing procedure during fast forwarding, and Fig. 3 explains the cueing procedure when rewinding. FIG. 1... System controller 2... Mechanical control section 3... Tape running section 4... VISS control circuit

Claims (1)

[Scope of Claims] 1) A device that records a cue signal consisting of a predetermined code at a cue location, detects this cue signal during fast forwarding or rewinding, and performs cue playback, which is operable when cueing. a brake mechanism; a means for controlling the operation of the brake mechanism with a delay after detection of the cueing signal, and controlling rewinding to a position where the recording base end position of the cueing signal overruns by a predetermined amount; 1. A cueing playback device comprising means for detecting the cueing signal again after entering a playback mode from an overrun position and then reproducing and outputting the cueing signal.