JPH0626031B2 - Magnetic recording / reproducing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a VTR program cueing system, and more particularly to a magnetic recording / reproducing apparatus which is easy to use.

[Background of the Invention]

Conventionally, recording of the index signal for cueing a VTR program was limited to recording from the stop mode, and was not possible when recording was restarted from the recording pause state. The reason is that the recording pause is often used for commercial cuts during recording, etc., and the index signal is intentionally recorded because it is not the turn of the program. The present invention relates to a method of this improvement. Various ideas for the cueing method have been proposed, and as one example, Japanese Patent Publication No. Sho 60-1905.
There is number 3.

[Object of the Invention] An object of the present invention is to provide a magnetic recording / reproducing apparatus which controls recording of an index signal in accordance with the contents of a recorded program and makes it easy to find the beginning of the program.

[Outline of Invention]

Unlike the recording of general commercial TV programs, only the audio may be recorded by the VTR. Especially for video tracks on magnetic tape
A VTR that records an FM-modulated audio signal along with a video signal
In this case, there are many cases where the source is tape, record, etc., or air check of FM, etc. In many cases, there is no need for commercial cuts as in TV programs, and the recording pause is often used at the turn of the program. By loading and unloading the tape, noise is not accidentally recorded and good recording is possible. Therefore, if the index signal can be recorded even when recording from the recording pause only in the case of recording only voice, the usability is further improved.

Example of Invention

An embodiment of the present invention will be described below with reference to the drawings. The figure is an example of a circuit configuration of a VTR in which the present invention is implemented, where 1 is an antenna,
Reference numeral 2 is a built-in tuner, 2a is an output terminal for the audio signal, and 2b is an output terminal for the video signal. Reference numeral 4 denotes a selector switch for switching between the tuner output and the external input signal, and the figure shows when the external input signal is selected. 3a and 3b are external signal input terminals. 3a is the audio side and 3b is the video side. Reference numerals 5 and 6 denote recording circuits for audio signals and video signals, respectively, and the signals passing through these circuits are recorded on the magnetic tape 9 by the recording heads 7 and 8. 10 is a video signal detection circuit, which normally detects only the sync signal in the video signal and outputs only when there is a sync signal
10a is generated. In this case, the output 10a is at a logic low level, and 11, 12 are logical product and logical sum circuits as can be seen from the figure. An index signal recording circuit 13 operates only when the output of the OR circuit 12 is at a logical high level, and the index signal is recorded on the tape 9 by the magnetic head 14. Reference numeral 15 shows a part of a system control circuit including a microprocessor for controlling the entire operation of the VTR.

With the above configuration, when the recording signal is the video signal including the synchronizing signal, the output 10a is at the low level, and therefore the index signal is recorded even if the system control circuit 15 outputs the high level signal 15a at the time of releasing the recording pause. Although the circuit 13 does not operate, the output 10a is at a high level when recording only the audio signal, so that the index signal is recorded by the signal 15a even when the recording pause is released. On the other hand, at the time of recording from the stop mode, the index recording circuit 13 operates regardless of the output 10a because of the signal of the output 15b. By the above, an example of index signal recording satisfying a desired function can be obtained.

〔The invention's effect〕

According to the present invention, since the index signal is recorded according to the content of the recorded program, the cueing operation at the time of reproduction becomes more convenient, and the effect of improving the usability is great.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a magnetic recording / reproducing circuit of the present invention. 2: Tuner, 5: Audio signal recording circuit, 6: Video signal recording circuit, 10: Video signal detection circuit, 15: System control circuit

Claims (1)

[Claims] 1. A magnetic recording / reproducing apparatus for recording / reproducing both a video signal and an audio signal on a magnetic tape, wherein an index signal recording circuit for recording an index signal for cueing a program on the magnetic tape, and an input of a video signal. Detection means for detecting the presence or absence of a recording medium, a control circuit for discriminating recording start from a normal stop position and recording start from a recording pause state, respectively, and when the control circuit discriminates recording start from a normal stop position. When the control circuit unconditionally drives the index signal recording circuit and the recording start from the recording pause state is determined by the control circuit, the index signal recording circuit is operated only when the image signal is not detected by the detection circuit. A magnetic recording / reproducing apparatus provided with a selecting means for driving.