JPS59161927A - Remote sound output device - Google Patents

Abstract

PURPOSE:To obtain a remote sound output device which causes no radio wave disturbance to other devices by using the infrared rays or ultrasonic waves as the carrier waves when the TV sounds are heard at a remote place. CONSTITUTION:A modulated infrared ray 19 is transmitted by an infrared ray transmitter 18 and the output of a sound signal circuit 8. The ray 19 is received by an infrared ray receiver 20 of a TV viewer. Thus the TV viewing and listening is possible through an earphone or a speaker set close to the viewer without troubling the neighboring persons and with no radio wave disturbance at all.

Description

[Detailed Description of the Invention] The present invention allows audiovisual devices such as television receivers, video tape recorders (VTR) devices, and audio equipment to be operated and viewed from a position slightly distant from those devices using a remote control device. The present invention relates to a remote audio output device that outputs audio from a device in the hands of the viewer.

The following will explain the case of viewing using a television receiver as an example. It is preferable to view images received by a television receiver by heating them to some extent from the cathode ray tube.Moreover, it is troublesome to move your seat to the position of the receiver each time you want to change channels. Remote control devices are widely used. However, if the audio output from the receiver's speaker is directly interrupted in such a viewing condition, there is a risk of disturbing people around the user.

Therefore, instead of outputting the audio output of the receiver directly from its speakers, the audio output is converted into a high frequency signal that is frequency modulated (FM) and sent out, so that viewers who are located far away from the receiver can listen to the FM receiver. Conventionally, systems have been used that allow users to receive these high-frequency signals and enjoy viewing without bothering those around them using earphones or the like.

FIG. 1 is a block diagram showing the configuration of such a conventional remote audio output device, in which (1) is a television receiver;
is a remote viewing device, (3) is a television receiving antenna,
(4) is a tuner, (5) is a video intermediate frequency signal processing circuit, (6) is a video signal processing circuit, (7) is a cathode ray tube,
(8) is an audio signal circuit, (9) is a speaker, (10) is a remote control device, (11) is an operation signal from this remote control device (infrared rays or ultrasonic waves), (+21 is an operation (M number) (03) is a remote control receiver that controls the tuner and others (operation signal lines other than the tuner are omitted) in response to the signal; 03) is an FM transmitter that outputs a high frequency signal frequency-modulated by the output of the audio signal circuit (8); α4) is the FM transmitting antenna, 0
5) is the FM signal wave, α6) is the FM receiving antenna, (17
) is an FM receiver.

The television receiver and its control system using a remote control device are well known and need no explanation. In this conventional remote voice output method, as described above, the receiving g1. 7M radio waves are used to connect the FMM unit 03) installed on the main body of the machine and the FM receiver 07) in the viewer's hand.

Of course, this FM radio wave was powered by electric power, but there was a risk that it would cause unexpected radio interference to others.

The present invention has been made in view of the above points, and provides a remote audio output device that does not cause radio wave interference to the outside by using infrared or ultrasonic waves as a carrier wave for the remote audio output method. It is something to do.

FIG. 2 is a block configuration diagram showing an embodiment of the present invention. The same reference numerals as in the conventional example of FIG. 1 indicate equivalent parts, and the explanation thereof will be omitted. 41 in this example, infrared transmitter 08)
Amplitude modulation 1 using the output of the audio signal circuit (8) by
It sends out infrared rays (+9) modulated by frequency modulation or &i, /< /res width modulation method, which is received by the infrared receiver (3) in the viewer's hand and transmitted through earphones or the viewer's pole. The built-in speakers make it possible to enjoy viewing without disturbing those around you, and there is no radio interference like in conventional systems.

By incorporating an infrared transmitter (181 and an infrared receiver), the number of components in the device can be reduced, and parts that perform the same signal processing can be shared. Furthermore, mutual interference and malfunction can be prevented by preventing the remote audio output device from operating while the remote control device is being operated.

Although the above embodiment shows the case of using infrared rays, it can be similarly realized using ultrasonic waves. Further, although the explanation has been given by taking the case of viewing using a television receiver as an example, the present invention can also be applied to video equipment such as a video tape recorder and a video disc player, as well as audio systems and the like.

As detailed above, in the present invention, a remote audio output device using infrared rays or ultrasonic waves is formed, so that viewers can enjoy viewing without bothering those around them and without causing radio wave interference.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a conventional remote audio output device, and FIG. 2 is a block diagram showing an embodiment of the present invention. In the figure, (1) is a television receiver (audiovisual device), +21 is a remote viewing device, (lO) is a remote control device, (11 operation signals, (12) is a remote control receiver,
(+8) i is infrared transmitter (signal transmitter), 09) is infrared signal, (20) G is infrared receiver (signal receiver)
It is. In addition, the same reference numerals in the figures indicate the same or equivalent parts. Display of case Japanese Patent Application No. 58-38581 2 Title of invention Remote audio output device 3 Person making the amendment 5 Detailed description of the invention in the specification to be amended 6 Contents of the amendment

Claims (1)

[Scope of Claims] A remote audio output device characterized by being equipped with a signal receiver that receives an infrared or ultrasonic signal from a signal transmitter, demodulates it, and obtains an audio output. (2) The signal receiver is in the hands of the viewer. A signal transmitter is provided in the audio-visual device 1 and is integrated with a remote control device for remotely controlling the audio-visual device. The remote audio output device according to claim 1, characterized in that it is configured integrally with a receiver.