JPH03272080A - Audio reproducing device - Google Patents

Abstract

PURPOSE:To constitute the device so that two listeners can listen independently to difference sources by providing an auxiliary audio signal line in addition to an audio signal line, and transmitting an audio signal of this auxiliary signal line by a radio wave. CONSTITUTION:In addition to an audio signal line 10, an audio signal line 20 is provided. By this auxiliary audio signal line 20, stereo audio signals from terminals 1L - 3R are supplied to switch circuits 22L, 22R for an input selector and an arbitrary stereo audio signal is fetched, and this signal is supplied to a transmitting circuit 24 through variable attenuators 23L, 23R for adjusting the sound volume. Accordingly, it can be reproduced from loudspeakers 15L, 15R and a headphone 45, but in this case, switching of the source and adjustment of the sound volume to the loudspeakers 15L, 15R and switching of the source and adjustment of the sound volume to the headphone 45 can be executed independently and freely, respectively. In such a way, one set of device can be used independently by two listeners.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an audio playback device.

[Summary of the Invention 2 The present invention provides an auxiliary audio signal line in addition to the original audio signal line in an audio playback device, and transmits the audio signal of this auxiliary signal line by radio waves. This allows listeners to listen to different sources independently.

[Prior art: - In an audio playback device such as a component stereo, sources such as an FM tuner, CD player, cassette player, DAT, etc. can be freely switched for playback.

[Problem to be solved by the invention]

By the way, in the audio playback device as described above, when a certain listener is listening to a certain source, all the remaining sources are idle.

However, in conventional audio playback devices, even if another source is available, another listener cannot select and listen to it. Therefore, an audio playback device is required for each listener.

Furthermore, if an audio playback device is provided for each listener, the listener will be unable to casually enjoy music because the other party's sound will be noisy unless the listener is in an extremely acoustically blessed environment.

This invention attempts to solve these problems.

[Means to solve the problem]

Therefore, in the present invention, a first audio signal line and a second audio signal line are provided, and both audio signal lines are provided with a selector for switching the source and a volume adjustment means.

The audio signal on the first 1-dio signal line is then supplied to a speaker so that it can be heard by a first listener, while the audio signal on the second audio signal line is supplied to a transmitting circuit. wirelessly
and the second listener can listen to it through headphones.

[Effect]

Even with one audio playback device, the sources are selected independently by two listeners.

〔Example〕

In FIG. 1, (1shi, IR) to (3L, 3R) indicate the input terminals for the first to third stereo audio signals, and among these terminals, the terminal with the suffix L is used to input the left channel audio signal. A right channel audio signal is supplied to the R terminal. Although not shown, these audio signals are supplied from an FM tuner, CD player, cassette deck, etc.

Further, (10) indicates the first audio signal line, and the stereo audio signals from the terminals (IL) to (3R) are transmitted to the input selector switch circuit (12L), (1
2R) and an arbitrary stereo audio signal is taken out, this signal passes through variable attenuators (13L) and (13R) for volume adjustment, and is further output to an amplifier (14).
L), (14R) through the left and right speakers (15L)
), (15R).

In this case, the switch circuits (12L), (12R) and attenuators (13L), (13R) are controlled electronically in conjunction with each other, and their input switching and signal attenuation are controlled by external control signals. It is possible to do.

Furthermore, (20) indicates a second audio signal line, in which stereo audio signals from terminals (IL> to (3R) are transmitted to input selector switch circuits (22L) and (2).
2R), an arbitrary stereo audio signal is taken out, and this signal is supplied to the transmission circuit (24) through variable attenuators (23L) and (23R) for volume adjustment.

In this case, the switch circuits (22L), (22R) and attenuators (23L), (23R) are also electronically controlled, and their input switching and signal attenuation can be controlled by external control signals. It is like that.

The transmitting circuit (24) also converts the stereo audio signal supplied thereto into an FM signal having the same signal format as current FM broadcasting, or converts the left and right channel audio signals to different frequencies. Two Fs by i
The signal is converted into an M signal and transmitted from the antenna <25>, and its transmission frequency is, for example, slightly below the FM broadcast band.

Furthermore, (40) indicates the receiver, and the antenna (25)
) is received by the antenna (41);
This received signal is supplied to the receiving circuit <42>, the original stereo audio signal is extracted, and this signal is supplied to the stereo headphones (45).

Further, (51) and (52> indicate transmitters of an infrared remote control, and the transmitter <51) is for remote control of the input selection and volume of the first audio signal line (10), and is used for transmitting The device (52) is for remote control of input selection and volume of the second audio signal line (20). Therefore, the transmitters (51) and (52)
Although not shown, it has an input selection key, a volume adjustment key, etc. When these keys are operated, data DT of the adjustment item assigned to the operated key is formed, and this data DT pulses. Modulated infrared light is output. Further, at this time, the output infrared light is also pulse-modulated by an identification code rD for identifying the transmitters (51) and (52).

(30> indicates the receiving circuit of the remote control; when infrared light for the remote control is output from the transmitter (51) or (52), the infrared light is transmitted to the photo sensor (3).
1), the light is received and converted into a remote control signal, and this signal is supplied to a decoder (33) through a shaping amplifier (32), where data DT of adjustment items and identification code In are decoded. Of this decoded output, data DT is supplied to the latches (341) and (342), and a latch pulse is supplied to the latch corresponding to the identification code In among the latches (341) and (342). Ru.

In such a configuration, when a key on the transmitter (51) is operated, data D corresponding to the operated key is transmitted.
Infrared light with an identification code In indicating T and the transmitter (51) is transmitted, and the infrared light is received by the light receiving element (31).

Then, according to the identification code 10 from the decoder (33), the data DT is latched in the latch (341), and the data DT is latched in the switch circuit (12L).
), (12R) or attenuator (13L), (1
3R) as its control signal, and the input of the first signal line (10) is switched or the volume is adjusted.

Therefore, when the keys of the transmitter (51) are operated, the source or volume output from the speakers (15L) and (15R) can be controlled.

Further, when a key of the transmitter (52) is operated, the data DT corresponding to the operated key and the transmitter (52)
) is transmitted, and the infrared light is received by the light receiving element (31>).

Then, in accordance with the identification code rD from the decoder (33), the data DT is latched in the latch (342), and the data DT is latched in the switch circuit (22L).
), (22R) or attenuator (23L), (2
3R) as its control signal, and the input of the second signal line (20) is switched or the volume is adjusted.

Therefore, when the keys of the transmitter (52) are operated, the source or volume output from the headphones (45) can be controlled.

Thus, according to the present invention, the speaker (15L), (
15R) and (20) can be played back through headphones (45); in this case, especially according to the present invention, switch circuits (12L, 1) are connected to the signal lines (10), (20).
2R), (22L, 22R) and attenuator (13
Since the speakers (L, 13R) and (23L, 23R) are provided independently, it is possible to switch the source and adjust the volume for the speakers (15L) and (15R), and to adjust the volume of the headphones (45L) and (15R).
) can freely switch sources and adjust volume independently.

Therefore, one device can be used independently by two listeners, and there is no need for an audio playback device for each listener.

Furthermore, since one listener listens to music through headphones (45), there is no need to arrange speakers that take up space, and there is no need for wiring to such speakers.

Furthermore, since the headphones (45) are wireless, the listener can move freely around the house.
You can easily enjoy music etc.

In addition, since one listener listens to music through the headphones (45), the sound of the other party does not become too loud for the listener who is listening to the music through the speakers (15L) and (15R), and the headphones (45) The listener listening on the headphones (45) also uses the speakers (15L),
Since the sound from (15R) is blocked, the sound from that speaker (
The sound from 15L) and (151?) does not become too loud.

Furthermore, if you combine it with a television set that has a picture-in-picture function, you can watch two programs at the same time on one television set.

In addition, in the above, the switch circuits (12L) to (2
2R) and attenuators (13L) to (23R) are electronically controlled, but a mechanical switch and variable resistor may also be rotated by a motor.

In addition to input (source) switching and volume control,
DSP etc. can also be adjusted in the same way. Furthermore, the volume of the headphones (45) can also be controlled by the receiver (4o).

〔Effect of the invention〕

According to this invention, the switch circuits (12L, 12R), (22L, 22R) are connected to the signal lines (10), (20).
) and (attenuator (13L, 13R), (23L
, 23R) are installed independently, so the speaker (15R) is installed independently.
L), (15R) and the source and volume adjustment for the headphones (45) can be independently and freely performed.

Therefore, one device can be used independently by two listeners, and there is no need for an audio playback device for each listener.

Furthermore, since one of the listeners listens to music through headphones (45), there is no need to arrange speakers that take up space, and there is no need for wiring to such speakers.

Furthermore, since the headphones (45) are wireless, listeners can move freely around the house.
You can easily enjoy music etc.

In addition, since one listener listens to music etc. through head hooks 45), the sound of the other party does not become too loud for the listener who is listening to music etc. through speakers (15L) and (15R), and also when listening through headphones <45). The listener also has headphones (45〉) and speakers (15L), (
Since the sound from the speaker (15R) is insulated, the sound from that speaker (1
The sound from 5L) and (15R) does not become too loud.

Furthermore, if you combine it with a television set that has a picture-in-picture function, you can watch two programs at the same time on one television set.

[Brief explanation of drawings]

FIG. 1 is a system diagram of an example of the present invention. (IL) ~ (3R) C input terminal, (10) C first (
D audio signal line, (12L), (12R), (
22L), (22R) are input selectors, (13L), (
13R), (23L), (23R) are variable attenuators, (15L), (15R)
(c) second audio signal line; (24) is a transmitting circuit; (30) is a receiving circuit; (4o) is a receiver; (45) is a headphone; (51) and (52) are transmitters.

Claims (1)

[Scope of Claims] A first audio signal line to which a plurality of audio signals are supplied, a second audio signal line to which the plurality of audio signals are supplied, and a transmission circuit; The second audio signal lines each have an input selector for selecting one of the plurality of audio signals, and the first audio signal line is connected to a speaker, and the audio signal selected by the input selector is The second audio signal line is supplied to the speaker, and the second audio signal line is connected to the transmission circuit, and the audio signal selected by the input selector is transmitted to the receiver through the transmission circuit. An audio playback device in which an audio signal selected by an audio signal line selector is supplied to headphones.