JPS58166512A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent a device operator from performing erroneous recording by placing recording in stereophonic mode automatically when a stereophonic broadcast is received regardless of the operation position of a manual recording selecting changeover switch. CONSTITUTION:A transistor (TR)23 in the circuit of a DC power source 13 is a TR switch for sending the output of the power source 13 to the recording selecting changeover switch 14 and normally turned on by a base resistance R. When a stereophonic signal is inputted to a decision signal detecting circuit 3, a DC output from a DC control terminal 5 is connected to the terminal 15 of the switch 14 through a diode while supplying the base of the TR23 through a diode 24 to turn off a TR3 between its emitter and collector. Consequently, switches 9-12 of a recording selecting changeover circuit operates during stereophonic reception regardless of the switching position of the switch 14 to record the left and right signals of the stereophonic signal respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention receives two systems of audio signals and video signals of audio multiplex television broadcasting (hereinafter referred to as sound length broadcasting), and
The present invention relates to a method for recording audio signals in a device that can simultaneously record after Ill Lyn.

The following describes only the audio system of the device.

Conventional recording devices that include the reception of tone length broadcasts are generally used for stereo broadcasts or two completely different broadcasts (hereinafter referred to as "different types of broadcasts"); In consideration of stereo broadcasting and different types of broadcasting, the system was constructed with a switching circuit as shown in FIG. Referring to FIG. 1 below, the audio carrier input to the audio carrier input terminal 1 is outputted by the 1M detector 2 as a discrimination signal between an audio signal and tone length broadcast, and then outputted in the matrix (b) path 4 by a discrimination signal. wrs receives DC control from the detection circuit output terminals 5 and 6 during stereo broadcasting and different types of broadcasting, and during stereo broadcasting, outputs left and right signals to matrix output terminals 7 and 8, respectively, and performs all broadcasting. Time is on one side!
If the main and the other are sub signals, the main and sub signals are each 7
and output to 8. The two output signals are sent to switches 9 to 12, which have input terminals, output terminals, and control terminals, and D
C power supply 15 and recording selection switch 14. The output is input to a recording selection circuit using a diode DK, and the output thereof is sent to the first recording amplifier 18 and the twentieth recording amplifier 19. When receiving stereo, the switch 14 is switched to the terminal 15, and the switches 9 and 12 are made conductive. Then, the left and right audio signals are input, and when different types of broadcasts are performed, the switch 1 is
When 4 is the terminal 15, the main and sub signals are input, and when the switch 14 is switched to the terminal 16 or 17, the main and main inputs are input in the case of the bender due to the operation of switches 9 to 12, similar to the above operation, and the latter is input. In the case of , enter the sub and sub. The above switching is input to the recording amplifiers 18 and 19, and 7. : 2 : 4.
The same audio signals are simultaneously sent to the magnetic medium 22 by the magnetic heads 20 and 21K, respectively. When receiving a stereo signal, if the switching circuit 14 is set to terminal 16 or 17, either the left signal or the right signal of the stereo signal will be recorded by the two magnetic heads 20, 21, and the stereo signal will be received. Nevertheless, it ends up being a typo.

An object of the present invention is to
To ensure that audio stereo recording of stereo broadcasting is performed even if there is an error by an IL handler.

Sound length broadcasting corresponds to different types of audio broadcasting systems and stereo broadcasting, and
A discrimination signal is superimposed on the broadcast signal, and the switching of the audio system of the recording device is forced only during stereo broadcasting by detecting the discrimination signal.

Hereinafter, one embodiment of the present invention will be explained with reference to FIG. 2. The circuit operations from the carrier wave input terminal 1 to the discrimination signal detection circuit 5, the matrix circuit 4, the switches 9 to 12 of the recording selection switching circuit, the recording amplifiers 18 and 19, the magnetic heads 20 and 21, and the recording selection switch 14 have been described above. However, here, D t' is a transistor switch that sends 15 outputs to the 16-time recording selection changeover switch 14, and the invitation base resistor RfC turns on 1! There is IaK. However, here, the DC output from the DC control output terminal 5 when the stereo signal is input to the discrimination signal detection circuit 3 is connected to the 250 base through the diode 24V, and to the terminal 15 of the transistor 3 through the diode 25. There is no conduction between the emitter and collector, and as can be seen from the conventional example, switches 9 to 12 of the stereo reception switching circuit record the left and right signals of the stereo signal, respectively, regardless of the switching of K and 14. I will be working in

According to the present invention, when a stereo broadcast is received, stereo recording is automatically performed regardless of the operation position i1 of the manual recording selection switch, and this prevents the operator of the device 1 from recording incorrectly. be.

[Brief explanation of the drawing]

FIG. 1 is a recording configuration diagram of a conventional example including a matrix/record selection switching circuit for tone length broadcasting, and FIG. 2 is a recording configuration diagram according to the present invention. 5...Discrimination signal detection circuit 4...Matrix circuit 14...Recording selection switch 9-12...Recording selection switching circuit

Claims (1)

[Claims] t. Two systems of audio signals of audio multiplex television broadcasting,
In an apparatus capable of recording and reproducing translated image signals and at least two systems of audio distribution circuits, when receiving the stereo broadcast of the broadcast, the two systems of audio reception signals provided by the Mayu Recording Equipment. Switch and connect to each of the two audio distribution circuits,
When receiving a stereo broadcast, the manual switch circuit for switching between recording and broadcasting is forced into the stereo state by using a stereo control signal, similar to controlling the matrix circuit for the delayed audio. A magnetic recording and reproducing device that is designed to record in stereo.