JPS58143680A - Sound multiple switching device - Google Patents

Abstract

PURPOSE:To obtain a remote control transmitter where two functions are switched by one instruction word, by using pilot signals for discriminating a stereo broadcast and a bilingual broadcast which are sent from the transmission side. CONSTITUTION:Switching signals generated from pilot signals discriminating the stereo broadcast and the bilingual broadcast which are included in a sound multiple broadcast are applied to input terminals A and B. A control signal from a remote controller is applied to an input terminal C. A stereo-monaural switching signal and a first sound-second sound switching signal are obtained in output terminals D and E of AND circuits 1 and 2 respectively. Thus, the right sound (R) and the left sound (L) of the stereo broadcast and the first sound and the second sound of the bilingual broadcast which are supplied to input terminals F and G respectively are switched by one remove control signal, and stereo or monaural sounds and first sounds or second sounds are led out to output terminals H and I respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switching system suitable for remote control devices (KtJ), particularly television receivers and VTRs having an audio multiplex reception function.

Conventional TV receiver remote control transmitters have around 25 buttons, and when audio multiplexing is added, two more buttons are added, and the remote control transmitter itself becomes larger. It is necessary to add two remote control command codes to be used for control.

An object of the present invention is to increase the size of a remote control transmitter compatible with audio multiplex broadcasting by adding only one button to the remote control transmitter to perform stereo-monaural switching and switching between first audio and second audio. It consists in providing without.

In the present invention, while the number of commands of the remote control is limited, 1
When trying to provide two switching functions with one command word,
It uses the stereo signal sent from the transmitting side and the pilot signal for distinguishing between two languages.

An embodiment of the present invention will be described below with reference to the drawings.

The figure is a circuit diagram of one embodiment.

In the figure, 1.2 is an AND circuit, 3/ is a stereo,
4 is a switch for selecting stereo or mono when receiving a stereo broadcast, and 5 is a switch for selecting the first audio or second audio when receiving a dual language broadcast. .

The selector switch 3.5' is driven by a switching signal generated from the pilot signal of stereo broadcasting and/or bilingual broadcasting, and when the movable contact is connected to the upper contact in the figure, stereo broadcasting is received and the switch is switched to the lower contact in the figure. When connected to , you can receive dual-language Japanese broadcasts.

The selector switch 4 is driven by a control signal applied to the output terminal DK of the AND circuit 1, and sequentially returns the two states of ON and OFF.

The changeover switch 5 is driven by a control signal applied to the output terminal 2 of the AND circuit 2, and the first sound and the second sound are sequentially switched by the changeover K of the movable contact.

The switching signal made from the pilot signal of stereo broadcasting and dual language broadcasting included in audio multiplex broadcasting is input to the input terminals in the figure.
In addition to BK, the input terminal CK is also an output terminal, and a stereo-monaural switching signal and a first audio-second audio switching signal are obtained at l, respectively. When input terminals 1 and G are supplied with the right and left signals of a stereo signal, or the first and second audio signals of dual language broadcasting, the output terminals H and IK are stereo-monaural or first audio- The second sound is switched and derived by the only signal from the remote control.

According to the present invention, stereo-monaural switching and switching between first audio and second audio can be performed using a single remote control signal.

In addition to the new function of being able to switch between stereo and monaural and between 1st audio and 2nd audio using a single remote control transmission button, the remote control transmitter can be used without major changes to its external form because it only requires one button. There are advantages. Furthermore, since the remote control generally uses a commercially available XC, there is the advantage that one instruction can be saved.

[Brief explanation of the drawing]

The figure is a circuit diagram of an embodiment of the present invention. 1... Mu ND circuit 2... Mu MD circuit 5
．． 5'...Two-power Japanese-stereo broadcast selection switch 4.
・Stereo-monaural selection switch 5 ・Bilingual broadcast selection switch

Claims (1)

[Claims] t. A first AND circuit (1) that introduces the stereo broadcast identification signal and the switching signal, a second AND circuit (2) that introduces the dual language broadcast identification signal and the switching signal, and the stereo broadcast identification signal and the switching signal. /or the two forces l1Il [! A first selector switch (5, 5') is driven by a broadcast identification signal to switch to one broadcast reception state, and a first switch (5, 5') is driven by an output signal of the first AND circuit to sequentially switch between stereo and mono. A signal switching device comprising a second selector switch (4) and a third selector switch (5) which is driven by the output signal of the second AND circuit and sequentially switches between the first audio and the second audio.