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JP2003009279

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DESCRIPTION JP2003009279
[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 Conventionally, as an audio output circuit of a television
receiver, one described in Japanese Patent Application Laid-Open No. 9-200900 is known. FIG. 3
shows an audio output circuit of a conventional television receiver.
[0003]
In FIG. 3, 1 is a first LPF for extracting a bass region, 2 is a second LPF for extracting a bass
region having a frequency characteristic different from that of the first LPF 1, 3 is a BPF for
extracting a vocal band, and 4 is a switch , 6 is composed of a plurality of speakers provided in
addition to the two left and right speakers.
[0004]
In this audio output circuit, the audio output from a plurality of prepared speakers other than the
left and right speakers only selects the left and right audio components from among several
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characteristics and outputs them. .
In this case, even in the case where a sound source is separated from the beginning such as a
right speaker, a left speaker, a center speaker, a woofer speaker, etc., such as 5.1ch audio input.
Since it was possible to output only the filtered output to the component that synthesized the left
and right voices, it was not possible to enjoy the sound full of sense of presence.
[0005]
SUMMARY OF THE INVENTION According to the present invention, each audio component such
as a right speaker, left speaker, center speaker, woofer speaker, etc. When the source divided
from the beginning is input, it is intended to output the sound assigned to each speaker in an
honest manner, and to enjoy the more realistic sound.
[0006]
SUMMARY OF THE INVENTION In order to solve this problem, according to the present
invention, input audio is automatically determined, and components assigned to the left and right
speakers and the left and right audio components are used. The audio output switching circuit is
configured to switch between the synthesized component and the component.
[0007]
As a result, the channel components assigned to the third, fourth, fifth, and sixth speakers can be
automatically output during 5.1-channel audio, so that more realistic sound can be enjoyed. .
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION The present invention incorporates six
speakers, that is, a right speaker, a left speaker, a center speaker, a woofer speaker, a left
surround speaker, and a right surround speaker. In the television receiver according to the
present invention, at the time of 2-channel audio input, a signal synthesized based on the left and
right speaker components is output from the center speaker, the woofer speaker, the left
surround speaker, and the right surround speaker.
[0009]
However, at the time of 5.1ch audio input, the center speaker and the woofer speaker, the left
surround speaker and the right surround speaker are not the voices synthesized from the left and
right voices as in the prior art, but they are automatically discriminated and This is a television
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receiver characterized by outputting the assigned ch component from the center speaker, the
woofer speaker, the left surround speaker, and the right surround speaker, and the user can
create a more realistic voice when 5.1ch audio is input. It has the effect that it can be enjoyed.
[0010]
An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
FIG.
[0011]
Embodiment 1 FIG. 1 shows a television receiver according to an embodiment of the present
invention.
In FIG. 1, 5, 6, 7, 8 are four speakers other than the left and right speakers, and 9 is the third,
fourth, fifth, six at 5.1ch audio input and at 2ch audio input. An audio output switching circuit
that switches the output of the speaker of the eye, and 10 is a synthesis circuit that generates the
third, fourth, fifth, and sixth speaker components from the left and right audio when 2ch audio is
input.
[0012]
At the time of 2-channel audio input, the third, fourth, fifth and sixth speaker components
produced by the synthesis circuit 10 pass through the audio output switching circuit 9 to the
speakers 5, 6, 7 and 8. It is output.
[0013]
At the time of 5.1ch audio input, the audio output switching circuit 9 discriminates the
components assigned to the third, fourth, fifth and sixth speakers from the 5.1ch audio input as
the speaker 5 , 6, 7, and 8.
[0014]
Second Embodiment FIG. 2 shows a BS digital television receiver according to a second
embodiment of the present invention.
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In FIG. 2, reference numeral 11 is a set built-in center speaker, 12 is a set built-in woofer
speaker, 13 is a set built-in left surround speaker, 14 is a set built-in right surround speaker, 9 is
a 5.1ch audio input and a 2ch audio input An audio output switching circuit that switches the
output of the center and woofer speakers, left surround speakers, and right surround speakers,
and 10 is a composite that creates center speakers and woofers, left surround speakers, and right
surround speaker components from left and right audio when 2ch audio is input It is a circuit.
[0015]
At the time of normal 2ch audio input, the center speaker and woofer speaker, left surround
speaker and right surround speaker components made by the synthesis circuit 10 pass through
the audio output switching circuit 9, set built-in center speaker 11, set built-in woofer speaker 12
, Left surround speaker 13 and right surround speaker 14.
[0016]
At the time of 5.1ch audio input such as 5.1ch broadcast by BS digital broadcast, the audio
output switching circuit 9 determines, and from 5.1ch audio input to the center speaker and
woofer speaker, left surround speaker, right surround speaker The assigned components are
output to the set built-in center speaker 11, the set built-in woofer speaker 12, the left surround
speaker 13, and the right surround speaker 14.
[0017]
(Third Embodiment) FIG. 2 shows a television receiver with a built-in DVD according to a second
embodiment of the present invention.
In FIG. 2, reference numeral 11 is a set built-in center speaker, 12 is a set built-in woofer
speaker, 13 is a set built-in left surround speaker, 14 is a set built-in right surround speaker, 9 is
a 5.1ch audio input and a 2ch audio input An audio output switching circuit that switches the
output of the center and woofer speakers, left surround speakers, and right surround speakers,
and 10 is a composite that creates center speakers and woofers, left surround speakers, and right
surround speaker components from left and right audio when 2ch audio is input It is a circuit.
[0018]
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At the time of normal 2ch audio input, the center speaker and woofer speaker, left surround
speaker and right surround speaker components made by the synthesis circuit 10 pass through
the audio output switching circuit 9, set built-in center speaker 11, set built-in woofer speaker 12
, Left surround speaker 13 and right surround speaker 14.
[0019]
During 5.1ch audio input such as Dolby Digital (AC3) in DVD reproduction, the audio output
switching circuit 9 discriminates, and from 5.1ch audio input to the center speaker and woofer
speaker, left surround speaker, right surround speaker The assigned components are output to
the set built-in center speaker 11, the set built-in woofer speaker 12, the left surround speaker
13, and the right surround speaker 14.
[0020]
As described above, according to the present invention, in the case of 5.1 ch voice, the third,
fourth, fifth, and so on are used to output the sounds synthesized from the left and right voices.
The ch component assigned to the sixth speaker can be automatically output to enjoy more
realistic sound.
[0021]
Brief description of the drawings
[0022]
1 is a block diagram of a television receiver in the first embodiment of the present invention
[0023]
2 is a block diagram of a television receiver in the second and third embodiments of the present
invention
[0024]
Fig. 3 A block diagram of a television receiver in a conventional television receiver
[0025]
Explanation of sign
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[0026]
1 1st LPF 2 2nd LPF 3 BPF 4 Switch 5 Speaker 6 Speaker 7 Speaker 8 Speaker 9 Audio Output
Switching Circuit 10 Synthesis Circuit 11 Set Built-in Center Speaker 12 Set Built-in Woofer
Speaker 13 Set Built-in Left Surround Speaker 14 Set Built-in Right Surround Speaker
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