JPS62262250A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To attain power saving and to prevent wear of components by discriminating the presence of a synchronizing signal in a video signal during the recording or reproduction and stopping the recording or reproduction when the synchronizing signal is lost for a prescribed time or over. CONSTITUTION:A vertical synchronizing signal or a horizontal synchronizing signal is separated from a video signal such as a television broadcast or a signal from a VTR by a video signal processing section 4 at, e.g., recording is outputted to a CPU 2. Then the CPU supervises the presence of the synchronizing signal during the recording or reproduction and regards it as the end of the video signal if the synchronizing signal is lost for a prescribed time or over so as to output a control signal 3 to the video signal processing section 4 and a mechanism 5, causing the recording or reproduction to be stopped. Thus, useless operation at recording or reproduction is stopped automatically.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording/reproducing device for recording or reproducing television broadcasting or video signals.

[Prior Art] FIG. 2 is a block diagram showing the configuration of a conventional magnetic recording/reproducing apparatus such as a system-controlled VTR. In the figure, (1) is a key operation section for setting the mode for recording or playback, or time settings such as recording time, and (2) is for processing the setting information operated with this key operation section (1). , a CPU (4) that controls the entire device based on the setting information, processes the video signal (for example, a video signal) in this magnetic recording/reproducing device based on the control signal (3) output from the CPU (2). video signal (3
) is a mechanism section that inputs information signals related to the mechanism of the device and controls the recording or playback mechanism, and (6) is a mechanism section that inputs information signals regarding the mechanism of the device and controls the recording or playback mechanism. This is a time management section that includes a CPU and the like for outputting time information to the CPU (2) and managing time accordingly.

The operation of the conventional magnetic recording/reproducing apparatus having the above configuration will be explained with reference to FIG. First, the key operation section (1)
The CPU operates the CPU (
2) inputs the data, performs arithmetic processing, and then sends it to the video signal processing unit (4).
and outputs a control signal (3) to the mechanism section (5), respectively. According to this control signal (3), 8! The structure (5) sets the mechanism to a recording mode, for example. Also, the video signal processing section (
4) Process the video signal for recording.

In the above-mentioned operation, the recording time etc. are set in advance on the key operation section (1
), the setting contents are set from CPU (
2) is input to and stored in the time management unit (6), and outputs recording start information to the CPU (2) when the owned clock function matches, for example, the recording start time;
Based on this information, the CPU (2) controls the video signal processing section (4) and mechanism section (5) to start recording the video signal. The above-mentioned recording can be automatically ended by setting the recording end time using the key operation section (1) through the same operation as the recording start.

[Problems to be Solved by the Invention] Since the conventional magnetic recording/reproducing device is configured as described above, in order to start and end recording or reproduction, it is necessary to operate the key operation section or to perform the operations in advance. Recording or playback is performed by setting the start and end times. For example, even if the video signal of a TV image becomes silent during playback, the playback operation will continue unless the operation to end playback is performed, and unnecessary There was a problem in that playback was performed.

This invention was made to solve the above-mentioned problems. 1. For example, a magnetic recording/reproducing device that can automatically terminate recording or reproducing operations when there is no signal due to the disappearance of television broadcast signals or video signals. The purpose is to obtain equipment.

[Means for Solving the Problems] In the magnetic recording and reproducing apparatus according to the present invention, the mode of recording or reproducing operation of a video signal is set by a key operation section, and based on this setting information, the CPU controls the mechanism section and the above-mentioned video signal. In addition to controlling the start of recording or playback of a video signal processing unit that performs signal recording or playback processing, the CPU receives a synchronization signal of the video signal and determines that the synchronization signal is absent for a predetermined period of time or more. It is sold in such a way that the recording or playback can be stopped and controlled when the recording or playback is stopped.

[Function] The magnetic recording/reproducing device according to the present invention outputs a vertical synchronization signal or a horizontal synchronization signal of the video signal to the CPU in the video signal processing section, and the CPU monitors the presence or absence of the synchronization signal during recording or reproduction. , it is determined that there is no synchronization signal for a predetermined period of time, and the recording or playback operation is stopped as the video has ended, making it possible to automatically stop unnecessary operations during recording or playback. Become.

[Embodiment] In FIG. 1, an embodiment of the present invention will be described below with reference to FIG. 1, where the same reference numerals as in FIG. 2 indicate the same or corresponding parts, and the explanation thereof will be omitted here.

(7) is a synchronization signal indicating only a vertical synchronization signal or a horizontal synchronization signal after extracting a video signal from the video signal to be recorded in the video signal processing unit (4),
The CPU (2) stops recording or reproduction of the video signal processing section (4) and mechanism section (5) depending on the presence or absence of the synchronization signal.

Next, the operation of the magnetic recording/reproducing device of the present invention will be described. The same operation as that of the conventional device is performed for recording or reproducing, but the characteristic operation of the present invention is the video signal processing section ( In step 4), for example, during recording, a video signal such as a television broadcast or video signal is separated into a vertical synchronization signal or a water bottle synchronization signal, and the CPU (
2) Output.

Then, the CPU (2) monitors the presence or absence of these synchronization signals during recording or playback, and when there is no synchronization signal for a certain period of time (for example, one minute or more), the CPU (2) ), the video signal processing unit (
4) and a control signal (3) to the mechanism section (5).

By the cooperation and operation described above, the operation in the recording state or the playback state is automatically stopped when the video signal ends. As a result, recording or reproduction is automatically terminated when the video signal is no longer available, without having to perform an operation to terminate recording or reproduction using the key operation section (1).

In the above embodiment, the no-signal time of the video signal, which is the condition for stopping the recording or reproduction of a moving object, is set to one minute or more, but it may of course be set to any time as required. Also,
In the above embodiment, the recording operation or the reproducing operation is stopped, but the power of the apparatus may be turned off at the same time as the recording operation is stopped.

Furthermore, in the above embodiment, the magnetic tape (not shown) runs from the time when there is no synchronizing signal until the recording or playback stops, but after the magnetic tape stops, the magnetic tape is rewound to the position where there is no signal. Also good.

Furthermore, it goes without saying that a manual switch may be provided to enable the automatic recording/reproducing stop function in the above embodiment to be activated as necessary.

[Effects of the Invention] As described above, according to the present invention, the presence or absence of a synchronization signal in a video signal being recorded or reproduced is determined, and when the synchronization signal is absent for a predetermined period of time or more, the recording or reproduction is performed. Since the operation is configured to stop, it is possible to eliminate problems such as recording or playback of video signals during television broadcasting even though there is no video signal, and furthermore. This has the effect of saving power and preventing wear and tear on parts.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a magnetic recording/reproducing apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram showing the configuration of a conventional magnetic recording/reproducing apparatus. In the figure, (1) is a key operation unit, and (2) is a CPU. (4) is a video signal processing section, (5) is a mechanism section, and (7) is a synchronization signal. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (2)

[Claims] (1) In a magnetic recording and reproducing device that records or reproduces video signals, there is a key operating section for setting the mode of the recording or reproducing operation, and the entire device is controlled based on the setting information from this key operating section. This CPU and this C
a mechanism section that is controlled by the PU and sets the recording or playback mechanism to a predetermined mode; and a mechanism section that is controlled by the CPU and performs recording or playback processing on the video signal during the recording or playback, and a synchronization signal for the video signal. The above CP
A video signal processing section outputting to U is provided, and the CPU detects that the synchronization signal from the video signal processing section becomes silent for a predetermined period of time or more during recording or playback control based on setting information from the key operation section. 1. A magnetic recording and reproducing device characterized in that the operation of the mechanical section and the video signal processing section is stopped and controlled. (2) The magnetic recording and reproducing apparatus according to claim 1, wherein the CPU is configured to stop the mechanical section and the video signal processing section as well as stop the apparatus power supply.