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JPH03195299

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DESCRIPTION JPH03195299
[0001]
FIELD OF THE INVENTION The present invention relates to video equipment and audio
equipment. Prior Art In recent years, the development of the audio and video industry has been
remarkable. In particular, multi-devices that can correspond to each signal source with one
device are regarded as important, and multi-response is also required in voice input. Hereinafter,
an example of a conventional audio circuit will be described with reference to the drawings. Fig.
3 is a block 2 · · ·-2 of the conventional stereo audio circuit. The circuit shown in FIG. Right voice
input terminal Left voice output circuit 3 ° Right voice output circuit 4. The left speaker 6 and
the right speaker 6 are configured. And it has separate input terminals, audio output circuits and
speakers on the left and right sides respectively. The audio signal input to the left side is output
to the left speaker, and the audio signal input to the right side is output to the right speaker, and
the left and right speakers are in a stereo where different sounds can be heard. SUMMARY OF
THE INVENTION However, in the configuration as described above, since the left side and the
right side are completely separate, a monaural audio signal (hereinafter referred to as
monophonic audio) input to either the left input or the right input When I input), I can hear the
sound only from the speaker of the input person and I have the problem that I can not hear
anything from the other speaker. In view of the above problems, the present invention provides a
monaural input stereo audio circuit capable of handling even monophonic audio from a stereo
audio circuit. Means for Solving the Problems In order to solve the above-mentioned problems,
the monophonic input corresponding stereo audio circuit of the present invention is configured
to use a phono pin jack with a switch on one side or both sides of an audio input terminal.
Operation The present invention can cope with monophonic monaural sound even though it is a
stereo sound circuit by the above-described configuration. Tsutsushi: When one person's
monaural audio signal is input, the same sound can be heard from the left and right speakers.
When stereo audio signal is input, different sounds can be heard from the left and right speakers,
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and the circuit is switched. Without it, an audio output corresponding to the input can be
obtained. The stereo / monaural audio circuit according to one embodiment of the present
invention will be described with reference to the drawings. FIG. 1 is a block diagram of a
monaural input stereo audio circuit according to an embodiment of the present invention. The
circuit of FIG. 1 has a left 14 voice input terminal 11.
Right voice input terminal 12. Left voice output circuit 3. Right audio output circuit 4. Left
speaker 5. The right speaker 6 is configured. The configuration is the same as that of the
conventional stereo audio circuit except that a phono pin jack with switch is used for the left
audio input terminal 11 and the right audio input terminal 12. The operation of the monaural
input corresponding stereo audio circuit configured as described above will be described below
with reference to FIGS. 1 and 2. First, the switchable phono pin jack used for the input terminal
11.12 is configured as shown in FIG. 2, and if the audio cable is inserted, the switch in the phono
pin jack is separated, Terminals a and b in FIG. 2 are not connected. This phono pin jack with
switch is used for the left audio input terminal 11 and the right audio input terminal 12, and the
terminal in FIG. 2 separated by the switch in the phono pin jack is connected to the other audio
signal line in FIG. For example, the inputs of the left audio output circuit 3 and the right audio
output circuit 4 in FIG. 1 are connected unless both the sound door 1 signal is manually input to
both the left audio input terminal 11 and the right audio input terminal 120. Therefore, in the
case of monophonic monaural sound input, the same sound can be heard from the left speaker 5
and the right speaker 6 regardless of which of the left sound input terminal 11 and the right
sound input terminal 12 is input. In the case of stereo audio input, it is input to both the left
audio input terminal 11 and the right audio input terminal 12, so the left and right audio circuits
are separated by the switch phono pin jack of the audio input terminal. It becomes a stereo
sound which can process and hear different sounds from the left speaker 5 and the right speaker
6. When the phono pin jack with switch is used for only one of the left and right audio input
terminals, when inputting single-power monaural audio, input to the other audio input terminal
instead of the switch phono pin jack There is a restriction that it is necessary to do, but there is
no change in that it can cope with monophonic voice of one person in spite of being 6 · · · stereo
voice circuit. As described above, according to the present embodiment, by providing a phono pin
jack with a switch on one side or both sides of the audio input terminal, it is possible to cope with
monaural audio of one person, though it is a stereo audio circuit. According to the present
invention, by providing a phono pin jack with a switch on one side or both sides of the audio
input terminal, it is possible to cope with monaural audio of one person, though it is a stereo
audio circuit.
[0002]
Brief description of the drawings
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[0003]
FIG. 1 is a block diagram of a monaural input corresponding stereo audio circuit according to an
embodiment of the present invention, FIG. 2 is an internal configuration diagram of a switchequipped phono pin jack used for an audio input terminal according to the present invention, and
FIG. It is a circuit diagram of an audio circuit.
11 ...... left audio input terminal, 12 ... ... right audio input terminal, 3 ...... left audio output circuit,
4 ...... right audio output circuit, a speaker
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