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JPS533802

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DESCRIPTION JPS533802
The aS invention title All-around sound reproduction system Each of the other pair of output
terminals outputting a signal between a pair of output terminals or connected to either of the
output terminals of the amplifier with substantially zero impedance The all same sound
reproduction method in which the voltages generated between all the groups between the three
pairs of decoder output terminals are linearly independent of each other during the full open
sound reproduction.
% 粁 claim
DETAILED DESCRIPTION OF THE INVENTION The present invention allows the listener to
distinguish the sound from the sound source spreading in the direction of 360 °, and to
distinguish the sound from the sound source having the position VC of different heights in the
same position. It relates to the type of all round sound reproduction operation. The present
invention-is a decoder? The present invention provides a decoder of such an apparatus in which
at least one part of the operation is performed by connecting several speakers to the output of
the amplifier. A sound reproducer performed by the method by which decoding or matrixing
connects a speaker to the output of an amplifier is described in detail by Gerzon in High-End
News (H4-FiNews), page 1104, published in August 1970, "Two-channel stereo from It is
published in Zhou Acoustic J (5 channel 4 round fr + om 2-Channel Stereo) and Hi-Fi-Use 1111
page 7 Hf (Hafler) published in August 1970 [2-Channel Quddraphon F]. However, these prior
proposals have at least one set of three speakers and the linear combination of the voltages of
these speakers is O. In other words, the □ signals applied to the three speaker sets are not
linearly independent. Linear independence has been found to be desirable if it is desired to
achieve regeneration in the correct direction. According to the present invention, at least three
amplifiers are connected to each other and each output a signal between the pair of output
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terminals and connected to a number of spinics greater than the number of amplifiers. A decoder
for an all-sounds reproduction device comprising the first 6 pairs of decoder output terminals,
wherein the output terminals of the decoder are substantially O impedance electrical connection
means for power output of said power amplifier Connected either to the terminal or to the other
pair of decoder output terminals, the voltages generated between all the groups of the three pairs
of decoder output terminals during linear reproduction are linearly independent of one another.
The term "linearly independent" means that if v, = t * vs is a voltage signal applied to any three of
the loudspeakers, it always satisfies the relationship alV, a2a2vt + a, V, = 0 It means that there is
no real non-zero value aIta2ta. If the invention is applied to a sound reproduction device
provided with a plurality of pairs of loudspeakers such that the sum of the signals applied to the
six pairs of loudspeakers is the same for all pairs, the decoder may Comprising one amplifier as
soon as it is placed in the input, and six second amplifiers for six pairs of speakers, arranged to
receive the signal applied to one of the six pairs of speakers, each The first output terminals of
the amplifiers are connected to one another, and the first pair of decoder outputs for six pairs of
loudspeakers is connected to the output terminal of the corresponding second amplifier, for six
pairs of loudspeakers The second pair of output terminals is vc connected between the
corresponding second output terminal of the second amplifier and the second output terminal of
the first amplifier.
According to a variant of the invention, which applies to a loudspeaker in which the number of
loudspeakers is arranged one more than the number of amplifiers, one of the pair of decoder
output terminals is connected to one output terminal of each amplifier, and the remaining One of
the decoder output terminals of each of the pair is respectively connected to the other output
terminal of each amplifier, and the other decoder output terminals are connected to each other.
When two or more terminals are connected to one another, they can of course be switched at the
common terminal. Hereinafter, the present invention will be described in detail based on an
embodiment of the attached drawings. As an embodiment of the present invention, the case
where a speaker is disposed at each corner of a rectangle and a cube will be described. In FIG. 1,
four speakers LP, 几 F, LB, and RB are disposed at the left front, the right front, the left back, and
the right rear orientation, respectively, and surround the listening range. The positive phase
terminal of the speaker is indicated by +. The input signals are the speaker LF, two signals SLF +
8RF heard from the RF, and a signal 2W given by 2W = 8LP + 5RB = SR, F + 8LB. Here, SLB * sBB
is a signal that can be heard from the speakers LB and RB on the left rear and the right rear.
Input signals 2W, SR, F and SLF are applied to each amplifier 10, 11 and 12. One output terminal
of each amplifier is connected to the common terminal C, and the common terminal C is not
necessarily required but may be grounded. The speakers RF and LP are respectively connected
between the other output terminal of the amplifier 11 ° 12 and the common terminal C. The
speaker LB is connected between the output terminal of the amplifier 10 and the second output
terminal of the amplifier (5), and the speaker RB is between the second output terminal of the
amplifier 10 and the second output terminal of the amplifier 12 ((It is connected. Therefore, the
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signal obtained from the speaker LBIII near 10 is 2W-8I (, F = (8LB + 8RP) -SR, F = 8I, B).
Similarly, the signal that can be seen by the speaker RB is ♀W−5RF = (5RJ3 ′ + SLF ′) − 8LF
′ = S volume. In FIG. 2, eight speakers RFD, LFU. R, FU, LFD, LBUL RBU, RBD and LBD are
disposed at each corner of the cube surrounding the listening range. These eight speakers are
then fed with signals from five amplifiers 15, 16, 17, 18 and 19 as shown in FIG. The amplifier
15 is supplied with 2W = 8LyU Ma MaBD = 8 RFU: 1: 8 LBD □ ′ ′ 5 LFD 8 8 RBU ′ = S 1 (a
signal 2W given by FD + 8 LBU).
The signals 8RFDt8RFUt5LFU and 5LFD74% EndPage: 2 are applied to the other amplifiers 1619, each of these signals being a speaker RFD. It is added to RFU, LFU and LBi'D respectively. The
method of connecting the speakers is the same as shown in FIG. 1, and the output terminals of
the respective amplifiers 16 to 19 are connected to the speakers corresponding to the input
signals to these amplifiers. Each other loudspeaker is connected between the output of the
amplifier which applies to the correspondingly diagonally opposed loudspeaker and the output of
the amplifier 15. The arrangement as shown in FIGS. 1 and 3 is any number of pairs where the
sum of the signals applied to each family opposite pair is equal to the sum of the signals applied
to each of the other diagonally opposite pairs. It can be applied to a device including a speaker.
For the ith pair of speakers, the signals found on the two speakers of this pair are Si and 8i. ただ
し、8i=2W−Siである。 Since the power amplifier providing signal 2W is connected to
substantially more speakers than any of the pond amplifiers, multiple identical amplifiers can be
substituted for convenience. In this case, each amplifier can signal to six pairs of speakers in each
group. FIG. 4 shows another decoder for adding signals to four speakers LF, 几 F, LB and RB. The
input signal is 3 signals (-8RF + 5LB). It consists of (8LF + 5LB) and (SRB + 8LB). These common
terminals C may, but need not necessarily, be grounded. The terminal of the negative (7) phase of
the speaker LB is connected to the common terminal C, and the terminal of the positive phase is
connected to the connection point, and the connection points are further connected to the
speakers LP, R, H The negative phase connection terminal and the positive phase connection
terminal of the speaker RF are connected. The other terminals of the speakers RF, LP and RB are
respectively connected to the other input terminals of the amplifier circuit 21 and n. The voltage
at the point relative to the common terminal C is given by the following equation. SI) tens F-8
times 1 + 8 LB) + (81, p + 8 LB) + (SRJ: 1 + SLB) +0) = + SLB + −; C81, p−8 几 F + 5 RJ3−5 LB)
where 81, p−8 formula + 5 RJ3−8 LB = It is 0. Therefore, it is SD "+8 LB. Therefore, the signal
8LB is seen by the speaker LB and the following three signals are applied to the other three
speakers. Speaker LPIC is (SLF + SLB)-8 LB "SLF Speaker RF & C is-(-SRF 15 LB) + 8 LB = 8 R; F
Speaker RH is (8 RB +" LH) "SLB = 8 RB Similar arrangement to that shown in Fig. 4 It can be
used to apply signals to more than four loudspeakers by using an amplifier that is less than one
loudspeaker than the number of loudspeakers.
In general, when applying signals from m amplifiers to m + 1 spies and forces, one terminal of
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the (m + 1) th speaker is connected to the interconnection common output terminal of each
amplifier, and the other terminal is the other (9 ) The other terminal of the other speaker is
connected to the other output terminal of each amplifier. The signal voltage required between
the terminals of the first loudspeaker is Sl, S, +8. ... When + 8m + 1 = 0, the signal Si-Sm + is
applied to the first amplifier. ここに、i=1.2、・・・・・・・・・9mである。 This is
because the potential of the first terminal of the (m + 1) th speaker is Sm + t and is higher than
the potential of the other terminal, and the potential of the second terminal of the first speaker is
Si Make sure that. In the case of the four loudspeakers described above with respect to ylc 4
figure, Sr = -8RPvSm-SLF? S, = SRJ 13 and 84 = -8 LB. The voltage between the three pairs of
loudspeakers arbitrarily selected in any of the following embodiments is the signal W. If X and Y
are linearly independent, and there is a pair of signals X and Y such that the signal of any
speaker is given by 5i = W-1-biX-)-CiY, it is linearly independent Indicates that there is. (10)
EndPage: 3 but bi and Ci are non-zero real coefficients, and the ratio bi: ct is a unique value for
each speaker. While this situation is sufficient to ensure the required linear independence, such
independence can be achieved in other ways. If there are at least four speakers such that the
device meets the above requirement for linear independence, it is clear that it is within the scope
of the invention, even if there are other speakers which do not meet the requirement. For
example, the third speaker is connected between the positive terminals of the loudspeakers LF
and RF shown in FIG. 1, and the signals SLF and S pseudo 1 are mixed and added. The
embodiments of the present invention are summarized below. 1. At least three amplifiers each
outputting a signal between a pair of output terminals, and six pairs of decoder output terminals
for connecting to a larger number of speakers than the number of amplifiers, the output
terminals of the decoder being Another pair of output terminals or any impedance zero
connected to either of the output terminals of the amplifier, all groups between the three pairs of
decoder output terminals throughout the same sound reproduction An all-round sound
reproduction method in which the voltages generated between them are linearly independent of
each other.
A first amplifier and one of the six pairs of loudspeakers having an arrangement of pairs of
loudspeakers such that the sum of the signals applied to the 2.6 pairs of loudspeakers is the
same for all the pairs A decoder comprising a second amplifier for six pairs of loudspeakers
arranged to receive a VC applied signal, and a first output terminal of each amplifier being qtcconnected, the first pair for six loudspeakers Decoder output terminals are connected to the
output terminals of the corresponding second amplifier, and the output terminals of the second
pair of loudspeakers of the six pairs are corresponding to the second output terminal of the
second amplifier and the second 2. A system according to claim 1, wherein said system is
connected between the second output terminals of the first amplifier. 3. One of the pair of
decoder output terminals is connected to one output terminal of each amplifier, one of the
decoder output terminals of the other polarity is connected to the other output terminal of each
amplifier, and the output terminal of the other decoder is The decoder according to claim 1, 4 or
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5 for the arrangement of loudspeakers, wherein the number of loudspeakers or the number of
amplifiers connected to each other is one more square. An all-around sound reproduction system
comprising: and each speaker connected to the output terminal of six pairs of decoders. 5. The
all-around sound reproducing system according to the above item 4, wherein fc4 speakers are
disposed at each corner of the rectangle. 6. The all-around sound reproducing system according
to claim 4, comprising eight speakers arranged at each corner of the cube. (2) Brief Description
of the Plane The first is a block diagram showing an embodiment of the all-around sound
reproduction method according to the present invention, and a schematic view of speakers
disposed at each corner of a rectangle and decoders used for these speakers Fig. 2 shows the
positional relationship when speakers are arranged at each corner of a cube, and Fig. 3 is a block
showing an embodiment of a decoder for adding a signal to the speakers arranged at each
position shown in Fig. 2. Fig. 4 is a block diagram showing another embodiment of a decoder
used for a speaker disposed at each corner of a rectangle (14) 10-22. · · Amplifiers, RB, LB, RF,
LF, LBU. LFU, LBD, LFD, 9 BU, RF'U, RHD, RFD ... speaker. EndPage:4・−FIG、
1−・・−FIG、2. −・EndPage: 5
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