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JPH1079896

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPH1079896
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
television receiver.
[0002]
2. Description of the Related Art For example, when reproducing a video disk, there is a circuit
device called an AV amplifier as means for making the reproduction sound field more effective.
This AV amplifier basically performs processing to change the acoustic effect of an audio signal
reproduced from a video disc and outputs it from a speaker, for example, a combination as
shown in FIG. 3 or FIG. 4 Used in
[0003]
That is, in FIG. 3, reference numeral 11 denotes a television receiver, 12 denotes a VTR, 13
denotes a video disc player, and 14 denotes an AV amplifier.
[0004]
When the television broadcast is received, the switch 112 is connected in the state shown in the
figure by the user.
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Further, in the tuner circuit 111, a target channel is selected, and a video signal and an audio
signal of that channel are extracted from the tuner circuit 111. The extracted video signal is
supplied to the CRT 113 through the switch 112 to display an image, and an audio signal from
the tuner circuit 111 is supplied to the speaker 114. Therefore, as in the case of a normal
television receiver, it is possible to view television broadcasts.
[0005]
On the other hand, when the VTR 12 or the video disc player 13 is used, the switch 112 is
connected by the user in the opposite state to the figure. Also, the video and audio signals from
the VTR 12 and the video and audio signals from the video disc player 13 are selected by the AV
amplifier 14.
[0006]
Then, the selected video signal is supplied from the AV amplifier 14 to the television receiver 11,
and further supplied to the CRT 113 through the switch 112 to display an image. The selected
audio signal is subjected to surround processing, reverberation processing, echo processing and
the like in the AV amplifier 13 and supplied to the left and right speakers 15L and 15R.
[0007]
Therefore, when the VTR 12 or the video disc player 13 is used, the reproduction screen can be
viewed by the television receiver 11, and at the same time, a more effective sound field can be
obtained.
[0008]
When the AV amplifier 14 has an OSD function, a predetermined video signal is supplied from
the AV amplifier 13 to the television receiver 11, and the operation mode of the AV amplifier 13
and its parameters are displayed on the CRT 113 by this video signal. Ru.
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Therefore, when setting the parameters of the playback sound field, etc., the setting value is
displayed on the CRT 13, so that setting can be performed while confirming the contents.
[0009]
Further, in FIG. 4, the tuner device 16 similar to the tuner circuit 111 is connected to the AV
amplifier 14, and when viewing a television broadcast, the video signal and the audio signal from
the tuner device 16 are the same. used.
[0010]
However, in the case of the combination shown in FIG. 3, when viewing a television broadcast,
not only the channel should be switched to the target broadcast station, but also the switch 112
must be switched to the state shown in the figure. Well, the operation is troublesome.
Further, when the VTR 12 or the video disc player 13 is used, the switch 112 must be switched
to the opposite state to that shown in the figure, and the VTR 12 or the player 13 needs to be
operated.
[0011]
Moreover, the combination of FIG. 3 can not effectively use the AV amplifier 14 when viewing a
television broadcast.
[0012]
In that respect, in the case of FIG. 4, there is no need to switch the switch 112, neither when
viewing a television broadcast nor when using the VTR 12 or the video disc player 13, and it
takes less time and effort.
In addition, also when viewing a television broadcast, the AV amplifier 14 can be effectively used,
and a more effective sound field can be obtained.
[0013]
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However, in the case of FIG. 4, although the receiver 11 incorporates the tuner circuit 111, it is
necessary to separately prepare the tuner device 16.
[0014]
In addition, when the receiver 11 is used alone, the switch 112 is normally connected in the
reverse state to that in FIG. 4, so that depending on the model, when the power is turned on, the
switch 112 is not connected. There is one that is forcibly connected to the state opposite to that
in FIG.
Therefore, in such a model, when the power is turned on, the switch 112 must be switched to the
state shown in FIG. 4 and the usability is extremely deteriorated.
[0015]
Furthermore, depending on the model, when the channel of the tuner circuit 111 is switched,
there is also a case where the switch 112 is switched to the tuner circuit 111 side in order to
validate the channel after the switching. When the channel operation of the tuner circuit 111 is
performed, the switch 112 has to be switched to the state shown in FIG.
[0016]
The present invention is intended to solve the above problems.
[0017]
In the present invention, a tuner circuit for selecting a channel and outputting a video signal and
an audio signal, a first external output terminal for outputting the video signal to the outside, and
the audio signal From the first external input terminal to which the video signal from the external
AV apparatus is supplied, the first external input terminal to which the video signal from the
external AV device is supplied, the tuner circuit, and the first external input terminal First switch
means for selectively taking out the video signal of the second video signal and the first switch
means, and when the first switch means selects the video signal from the tuner circuit, A second
switch unit for extracting an audio signal from the tuner circuit; and a video signal output from
the first switch unit is displayed as an image. In the state of selecting the video signal from the
first external input terminal, the speaker, which outputs the audio signal output from the second
switch means as a sound, and the first and second switch means. And a means for holding the
television set.
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[0018]
Therefore, the video signal and the audio signal from the tuner circuit and the external AV device
are supplied to the AV amplifier, and the process of changing the sound field is performed on the
audio signal.
[0019]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 20
denotes an example of a television receiver according to the present invention, which has a tuner
circuit 21 and a video processing circuit 23, and has, for example, a color CRT 24 as a color
display element. .
[0020]
In this case, the tuner circuit 21 selects a channel according to the user's operation, and outputs
a video signal (a composite signal of a luminance signal and a carrier color signal) and an audio
signal (a stereo signal of the left and right channels) of that channel. It is a thing.
Also, when a video signal is supplied to the video processing circuit 23, the video processing
circuit 23 demodulates red, green and blue three primary color signals from the video signal and
supplies these signals to the CRT 24.
[0021]
Furthermore, the receiver 20 includes switch circuits 22 and 25, an audio processing circuit 26,
and speakers 27L and 27R of left and right channels.
The switch circuits 22 and 25 are, by default, connected in the opposite state to that shown in
the figure, and therefore are connected in the opposite state to the figure when shipped from the
factory.
Further, when an audio signal is supplied to the audio processing circuit 26, the audio processing
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circuit 26 performs power amplification and the like on the audio signal and supplies the audio
signal to the speakers 27L and 27R.
[0022]
Then, the video signal and the audio signal from the tuner circuit 21 are taken out to the external
output terminals 31 and 32 and supplied to the switch circuits 22 and 25 and the video signals
supplied to the external input terminals 33 and 34 as described later. And audio signals are
supplied to the switch circuits 22, 25.
Then, in the switch circuits 22, 25, one set of two video and audio signals supplied thereto is
selected, and the selected signal is supplied to the circuits 23, 26.
[0023]
Further, the receiver 20 is provided with a microcomputer 35 for system control, and the
microcomputer 35 supplies a channel selection signal to the tuner circuit 21 and controls the
circuits 22, 23, 25 and 26. A signal is provided.
[0024]
The receiver 20 is also provided with a remote control signal (remote control signal) receiving
element, such as an infrared light receiving element 36, whereby an infrared signal from a
remote control transmitter (not shown) is received. The received signal is supplied to the
microcomputer 35, and the remote control of the receiver 20 is realized.
[0025]
Further, reference numeral 40 denotes an AV amplifier, which includes switch circuits 41 and 43
for selecting an input video signal and audio signal, a video processing circuit 42, and an audio
processing circuit 44.
[0026]
In this case, the video processing circuit 42 has a buffer amplifier or the like, and sends the video
signal selected by the switch circuit 41 to the input terminal 33 of the receiver 20 almost as it is.
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Also, the audio processing circuit 44 performs processing to enhance the effect of the sound field
such as surround sound, reverberation, echo, delay, matrix, and frequency characteristic on the
audio signal selected by the switch circuit 43. The output audio signal is supplied to the speakers
50L and 50R of the left and right channels.
[0027]
Further, an audio signal of the center channel is taken out from the audio processing circuit 44
and this audio signal is supplied to the input terminal 34 of the receiver 20.
The speakers 50L, 50R are disposed on the left and right of the receiver 20 as viewed from the
user.
[0028]
Further, the AV amplifier 40 is provided with a microcomputer 45 for system control, and the
control signals are supplied from the microcomputer 45 to the circuits 41 to 44.
The control signal supplied to the audio processing circuit 44 controls parameters of processing
items such as surround sound, reverberation, echo, delay, matrix, and frequency characteristics.
[0029]
Further, the AV amplifier 40 is provided with a remote control signal receiving element, such as
an infrared light receiving element 46, whereby the infrared signal from the transmitter 47 of the
remote control is received and the received signal is supplied to the microcomputer 45. The
remote control of the AV amplifier 40 is realized.
[0030]
Reference numerals 51 and 52 denote external AV devices such as a VTR and a video disc player,
and video and audio signals from these are supplied to an AV amplifier 40.
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[0031]
In such a configuration, when the receiver 20 is used alone, it can be used in the same manner as
a general television receiver.
That is, at the time of shipment from the factory, switch circuits 22 and 25 are connected in the
reverse state to that shown in the figure (when switch circuits 22 and 25 are connected in the
state shown in the figure, for example, keys of receiver 20 (not shown) When the control circuit
is operated, a predetermined control signal is taken out from the microcomputer 35, and the
switch circuits 22 and 25 are connected in the reverse state to the figure by this control signal.
The data for making this connection state is held in the microcomputer 35, and this connection
state is held unless the user releases it.
[0032]
When the switch circuits 22 and 25 are connected in the reverse state to that in the figure, the
video signal and the audio signal from the tuner circuit 21 are transmitted through the switch
circuits 22 and 25 to the video processing circuit 23 and the audio processing circuit 26. And to
the CRT 24 and the speakers 27L and 27R.
Therefore, the television broadcast of the channel selected by the tuner circuit 21 can be viewed.
That is, the receiver 20 can be used alone.
[0033]
On the other hand, when the receiver 20 is used in combination with the AV amplifier 40, these
are connected as shown in the figure. Further, in response to this connection state, for example,
the key of the receiver 20 is operated.
[0034]
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Then, a predetermined control signal is taken out from the microcomputer 35, and the switch
circuits 22 and 25 are connected in the state of the figure by this control signal, and data for
making this connection state is held in the microcomputer 35. This connection state is
maintained as long as is not released.
[0035]
Then, the video signal and the audio signal from the tuner circuit 21 are supplied to the switch
circuits 41 and 43 of the AV amplifier 40 through the output terminals 31 and 32.
In addition, video and audio signals from the AV devices 51 and 52 are also supplied to the
switch circuits 41 and 43 of the AV amplifier 40.
[0036]
Therefore, when a predetermined key operation is performed on the operation key (not shown)
of the AV amplifier 40 or the remote control transmitter 47, the switch circuits 41 and 43 are
interlocked and switched by the control signal from the microcomputer 45, Among the video and
audio signals from the tuner circuit 21 and the AV devices 51 and 52, the video and audio
signals corresponding to the key operation are selected and extracted.
[0037]
Then, the video signal extracted from the switch circuit 41 is supplied to the input terminal 33 of
the receiver 20 through the video processing circuit 42, and is further supplied to the video
processing circuit 23 through the switch circuit 22.
Therefore, of the video signals from the tuner circuit 21 and the AV devices 51 and 52, the image
of the video signal selected by the switch circuit 41 is displayed on the CRT 24.
[0038]
Further, at this time, the audio signal extracted from the switch circuit 42 is supplied to the audio
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processing circuit 44, subjected to predetermined processing, and then supplied to the speakers
50L and 50R. In addition, an audio signal of the center channel is taken out from the audio
processing circuit 44, and this audio signal is supplied to the input terminal 34 of the receiver 20
and is further supplied to the audio processing circuit 26 through the switch circuit 25.
[0039]
Therefore, among the audio signals from tuner circuit 21 and AV devices 51 and 52, the
reproduced sound by the audio signal selected by switch circuit 42, that is, the audio signal
paired with the video signal displayed as an image on CRT 24 Reproduction sound is output from
the speakers 50L, 50R, 27L, 27R. Therefore, the receiver 20 and the AV amplifier 40 can be used
in combination.
[0040]
In this case, when the remote control transmitter 47 is operated, the infrared signals to be output
from this are received by the light receiving elements 36 and 46, and channel switching of the
receiver 20 and input switching of the AV amplifier 40 are remote controlled.
[0041]
Thus, the receiver 20 of FIG. 1 can be used alone or in combination with the AV amplifier 40. In
this case, the switch circuits 22 and 25 may be used alone or in combination with the AV
amplifier 40. Once switching is performed according to the user's intention, it is not necessary to
switch thereafter unless the usage mode is changed.
Therefore, when the television broadcast or the VTR 12 or the video disc is reproduced, various
operations are not necessary, and the usability is good.
[0042]
Furthermore, when the switch circuits 22 and 25 are switched to the state shown in the figure,
the switching state is maintained. Therefore, when the power is turned on or the channel is
switched, the switch circuits 22 and 25 are put into the state shown in the figure. There is no
need to switch, and this is also convenient.
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[0043]
Further, the AV amplifier 14 can be effectively used not only when using the VTR 12 or the video
disc player 13 but also when viewing a television broadcast, and a more effective sound field can
be obtained.
Furthermore, since the tuner circuit 21 built in the receiver 20 can be used, it is not necessary to
separately prepare a tuner device.
[0044]
Furthermore, the AV amplifier 40 and the receiver 20 can be remote-controlled by one remote
control transmitter 47, and it is not necessary to use the remote control transmitter attached to
the receiver 20 in combination.
[0045]
In the example shown in FIG. 2, the microcomputer 35 of the receiver 20 and the microcomputer
45 of the AV amplifier 40 are connected through the communication line 61.
[0046]
Therefore, in order to emphasize the use of the receiver 20 alone, when the channel is switched
by the remote control, the switch circuits 22 and 25 are further connected reversely to the figure
so that the inputs of the terminals 33 and 34 become invalid. Even when the receiver 20 is
configured, the AV amplifier 40 can be effectively used.
[0047]
That is, when the remote control transmitter 47 is operated to perform channel switching key
operation, the infrared signal from the transmitter 47 is received by the light receiving element
46, and the received signal is supplied to the microcomputer 45. Predetermined data is
transmitted to the microcomputer 35 through.
As a result, the microcomputer 35 switches the tuner circuit 21 to the target channel, and the
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switch circuits 22 and 25 are connected in the state shown in the figure.
Therefore, even if the channel is switched by the remote control, the input signals of the
terminals 33 and 34 become valid.
[0048]
Thus, in the case of this example, when the receiver 20 is used alone, the remote control can be
performed by the remote control transmitter attached to the receiver 20, and when used in
combination with the AM amplifier 40, the remote control transmitter As 47 can be used, it can
be used according to the application.
[0049]
Further, by using the communication line 61, for example, when using the AV devices 51, 52, an
instruction to switch the switch circuits 22, 25 to the state of the drawing may be sent through
the communication line 61 or the receiver 20 is in the standby state. For example, it can be
turned on.
Alternatively, when the power of the AV amplifier 40 is turned off, an instruction to turn off the
power (standby state) can be sent from the AV amplifier 40 to the receiver 20 through the
communication line 61.
[0050]
In the receiver 20 of FIG. 1, when the channel is switched by the remote control, the receiver 20
is further connected such that the switch circuits 22 and 25 are connected in the reverse of the
figure so that the inputs of the terminals 33 and 34 become invalid. When configured, the
remote control transmitter 47 may be configured to output an infrared signal for switching the
switch circuits 22 and 25 to the state shown in the figure following the infrared signal for
channel switching.
[0051]
Further, in FIG. 1, although it is assumed that the infrared signal from the remote control
transmitter 47 of the receiver 20 (and the AV devices 51 and 52) is received by the light
receiving element 36, the received signal is supplied to the microcomputer 35. An infrared signal
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from the remote control transmitter 47 is received by the light receiving element 46, and the
received signal is converted into a remote control signal for the receiver 20 (or AV equipment 51,
52) in the microcomputer 45, and this remote control signal is an infrared signal To be supplied
to the light receiving element of the light receiver 20 (or the AV devices 51, 52).
[0052]
According to the present invention, it is not necessary to switch between the tuner output and
the external input, neither when viewing a television broadcast nor when using an AV device, and
it takes less time and effort.
In addition, even when viewing a television broadcast, the AV amplifier can be effectively used,
and a more effective sound field can be obtained.
[0053]
Moreover, the tuner circuit built in the receiver can be effectively used, and it is not necessary to
separately prepare a tuner device.
In addition, when the power is turned on or when the channel is switched, there is no need to
always switch the tuner output and the external input to the tuner output side, which is also
convenient in this respect.
[0054]
Brief description of the drawings
[0055]
1 is a connection diagram showing an embodiment of the present invention.
[0056]
2 is a connection diagram showing another embodiment of the present invention.
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[0057]
3 is a connection diagram for explaining the present invention.
[0058]
4 is a connection diagram for explaining the present invention.
[0059]
Explanation of sign
[0060]
Reference Signs List 20 TV receiver 21 tuner circuit 23 video processing circuit 24 color CRT 26
audio processing circuit 27L and 27R speakers 31 and 32 external output terminals 33 and 34
external input terminals 35: microcomputer, 36: light receiving element, 40: AV amplifier, 47:
remote control transmitter, 50L and 50R: speaker, 51: VTR, 52: video disc player
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