JPH0319118Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is equipped with a tuner that receives broadcast radio waves, records the tuner's output signal and external input signal on a magnetic tape, and simultaneously reproduces the recorded signal. The present invention relates to a magnetic recording/reproducing device that can output data to the outside.

[Background technology and its problems]

Conventionally, most of the magnetic recording and reproducing devices that record and play back TV programs have built-in tuners, so they can detect programs from different stations than the programs being displayed on the TV receiver (usually called subprograms). can be recorded simultaneously.

However, if you try to watch the above-mentioned subprogram while playing back a recorded program and watching it on a TV receiver, the playback operation will be stopped by pressing the stop button, and then the subprogram will be selected and the TV screen will be displayed. The image will be sent to the machine.

Therefore, in order to display the playback image again, the playback button must be pressed, and each time the VTR's drive mechanism stops loading the magnetic tape.
The problem was that the reproduced image could not be viewed until the magnetic tape reached a constant speed due to repeated unloading and loading.

[Purpose of the invention] In order to eliminate the above-mentioned drawbacks, this invention allows you to immediately watch the opposite program by pressing any other operation button when you want to watch the opposite program during playback, without canceling the playback operation. The objective is to provide a magnetic recording and reproducing device (VTR) that has been improved to produce images.

[Summary of the idea]

In order to achieve the above-mentioned purpose, this invention has a changeover switch that can select and output the tuner output and tape playback signal. The device is configured to operate so that the signal of the desired channel is immediately output without interrupting the playback operation.

〔Example〕

Figure 1 is a block diagram showing the outline of the magnetic recording/reproducing device of this invention, in which 1 is a tuner, 2 is a playback amplifier, 3 is a magnetic tape playback mechanism, and 4 is an RF conversion circuit that modulates a high frequency signal with a playback video signal. , 5 is a TV receiver for monitoring.

Reference numeral 6 designates a changeover switch that selects either the output signal of the tuner 1 or the output signal of the reproducing amplifier 2 and outputs it to the RF conversion circuit 4. Connected as shown in the dotted line, the magnetic tape recording signal is
It is output to the TV receiver 5 via the RF conversion circuit 4.

Further, numeral 7 indicates a logic circuit which outputs a control signal Vc by ANDing the playback operation signal 8 output from the system controller circuit 10 etc. and the signal from the record button 9. When a signal, for example, an H level output is received, the changeover switch 6 selects the output of the tuner 1 as shown by the solid line.

This device has the above-mentioned configuration, so when you want to know the progress of a baseball broadcast that is a subprogram while playing a magnetic tape, or when you want to check the time displayed on a broadcast program, etc. When you want to display a different program on the TV receiver 5 for a short period of time, as shown in FIG. Can be switched.

At this time, the reproducing operation of the magnetic recording/reproducing device continues, but the changeover switch 6 changes the output of the tuner 1.
Since the signal is supplied to the TV receiver 5 via the RF conversion circuit 4, the program on the TV receiver 5 is immediately switched to the program received by the tuner 1, that is, the counterprogram.

When the record button 9 is released, the output of the logic circuit 7 becomes the second control signal, for example, Vc=0, and the changeover switch 6 returns to the dotted line state.
The reproduced image appears on the TV receiver 5 again.

At this time, the magnetic tape playback mechanism continues its playback operation without stopping, so you can easily see what the other program is like (although the playback image is fragmented), and you can immediately return to the original playback image. It has the effect of being able to return to

Note that since the playback operation is configured to control the system control circuit 10 of the magnetic recording and playback device with priority over the recording operation, the record button 9 is pressed during playback.
Even if you press , recording will not start. However, as an input signal to the logic circuit 7 of this invention, instead of the record button 9, signals from other function buttons other than the fast forward (reverse) search, stop, etc. buttons related to playback operations are input. You can.

In particular, if you input the signal from the channel selection button on tuner 1, you can select the opposite program and select switch 6.
The advantage is that the switching is done at the same time.

Figures 2a and 2b show one embodiment of the logic circuit 7, and in the case of a, the reproduction operation signal 8 (FWD)
In the case of b, the AND circuit 13 is connected to the D terminal of the D-flip-flop 12. A logic circuit 7 is constructed by inputting a playback operation signal 8 (FWD) through the terminal, and inputting a signal (REC) from a record button 9 to a CLK terminal. Both circuit examples show cases in which an H-level control signal Vc is output, but in case a, the control signal Vc is reduced to 0 by releasing the press of the record button 9.
In the case of b, there is a memory function, and the control signal Vc is returned to 0 by the signal (REC) of the second recording button 9.

Note that the logic circuit 7 may be incorporated into the system control circuit 10.

As explained above, the magnetic recording and reproducing device of the present invention has the advantage that it is possible to easily know the status of the opposite program during playback operation, and it is also possible to immediately return to the original playback image by operating the same button. be. Furthermore, since an existing button such as a record button can be used as a switching button, there is no need to newly provide an independent switching button.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an overview of this invention, and FIGS. 2a and 2b are circuit diagrams showing an example of a logic circuit. In the figure, 1 is a tuner, 2 is a playback amplifier, 3 is a magnetic tape playback mechanism, 4 is an RF conversion circuit, and 5 is a
A TV receiver, 6 is a changeover switch, 7 is a logic circuit, 8 is a playback operation signal, and 9 is a record button.

Claims (1)

[Claims for Utility Model Registration] (1) Selected output signals from a tuner to which an antenna input signal is supplied and playback signals from a magnetic tape wound around a rotating head drum for recording and playback. In a magnetic recording and reproducing device equipped with a changeover switch capable of outputting a signal to an antenna input terminal of a television receiver via an RF conversion circuit, the magnetic recording and reproducing device is supplied with a signal from a system control circuit during a reproducing operation. A logic circuit is provided in which a first control signal is output based on a playback operation signal that does not affect the playback operation and an operation signal of an operation button that does not affect the playback operation, and the changeover switch outputs a first control signal that is output from the logic circuit. The output signal of the tuner is selected according to the signal without stopping the drive of the tape being played back, and the second control signal output from the logic circuit is selected by operating the operation button again. A magnetic recording/reproducing apparatus characterized in that it is configured to select a reproduction signal of a magnetic tape being reproduced from the tuner output. (2) Utility model registration claim No. (1) characterized in that the logic circuit is composed of an AND circuit
The magnetic recording and reproducing device described in 2. (3) The magnetic recording and reproducing apparatus according to claim (1), wherein the logic circuit is constituted by a D flip-flop circuit.