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Patent Office Secretary Hideo Saito 1, Patent Name of the Invention 6, the same as the patent
applicant 6, patent applicant, 49-06, 874 ■ Japanese Patent Office Open Patent Gazette ■
Japanese Patent Application Laid-Open 5 0 161 202 0 Japanese Patent 50. (1975) 12.27 Agency
Serial Number Z-Tuk / Sword 7 // ♂b1, Title of the Invention] 1, Title of the Invention] Multichannel stereo reproduction system
2, inventor
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to sound
reproduction schemes, and more particularly to multi-channel stereo reproduction schemes. For
example, four speakers are placed at angular positions so as to form a square, and four channels
of stereo signals are given to the speakers, and all sides of the square formed by the speakers are
provided. It is known to form sound image localization at a nearby position. FIG. 1 (A) is a
conceptual diagram of a known RM decoder for obtaining a 4-channel stereo signal from 2
channels, and FIG. 1 (B) shows a layout of speakers. LB。 LP, RF and RB are signals given to
speakers to be disposed as shown in FIG. 1 (B) at the rear left, front left, front right and rear right,
respectively. 1'o, 12.14 and 16 respectively show phase shifters of 90 °, 0 °, 0 ° and + 9ci ',
and in such a configuration, the present embodiment shown in Fig. 1 (B) · LF +- ) LB, RF 2 RB.
There is a phase difference of 900 between each of the speakers, and a preferable sound image
localization can not be obtained. It is known that such a phase difference is substantially zero,
that is, it is preferable that there is no phase difference, and that a phase difference of about 45
° at EndPage: 1 is substantially acceptable. Fig. 2 (A)-A known RM decoder is a 4-channel stereo
output LB ', L, of QDC 84 channel cartridge (cartridge designed by the applicant and capable of
obtaining a direct 4-channel stereo signal). ', R,' RB 'are shown. As shown in FIG. 2 (B), the phase
difference between the speakers LF / ← ′ ′ B ′% LF′HR, t, −R, / → RB ′ can be ideally 0
°, but the rear The phase difference between the loudspeakers LB "++ RB" is 180 ° --there is a
drawback that sound image localization between the rear loudspeakers can not be realized
preferably. Furthermore, in the multi-channel stereo reproduction system, the retirement age is
surely ensured between the speakers! It makes sense that “ideal” is within 60 ° of the angle
between the speakers with respect to the listener. In the four-channel stereo system described
above, the above-mentioned angles are all 90 ° in the ideal state where the central position of
the square formed by the speaker corresponds to the listening position. Thus, it is known that six
or more loudspeakers and n stereo signals to each loudspeaker are required to make all such
angles less than 600. The present invention uses four output signals from, for example, QDC8
From that, the λ output signal is input to the electronic circuit according to the present
invention: f'L6 channel / sq or more; that is, it is subjected to stereo signal conversion applied to
six or more speakers. Follow? Thus, the above-described inter-speaker angle can be 45 ° or less.
Furthermore, according to the present invention, the signal phase difference of each adjacent
speaker can be 450 or less. . FIGS. 3 (A) and 3 (B) show the phase shifters
And + Of the first embodiment of the present invention. The input signals provided to
M 2.24.26 are, for example, the LB ', LF /, R, /, RB / scratch signals from the QDCS cartridge. It is
given to speakers in front of the right, in front of the right, behind the right, "a stereo signal
intended for Uo. The output from each phase shifter is connected to the respective
speaker (see FIG. 3 (&) ') and the signal' channel (LB, 57% 87% RB) is supplied. The outputs of the
“LB” phase shifter 20 and the LF phase shifter 24 are preed by a resistor 2.81.30 and
connected to the Ci channel for the central left speaker OL via a channel 32. With this uniformity,
each phase difference of 0L-LB and 0L-LF can be cooled to 450. The same applies to the centerright-handed speaker CRK. It is not necessary to provide the back holes 52 and 32 /. , LB / and
RB / are each shifted by 90 ° and + 90 °, respectively. As a result, the phase difference
between LB− and RB is 0 °. FIG. 3 (B) shows this relationship. FIGS. 4 (A) and 4 (B) provide a
summary of the second embodiment of the present invention. The LB 'input signal is connected
to the Bl channel through a 90 ° phase shifter 64, and is routed through the 00 phase shifter 36
to the LP channel. 7LF/□URp’、ヶっゆヤ□イ。。 ・。 , EndPage: 2 connected to the FL
and FR channels via 258 and 40. The Rβ 'signal is connected to the BR channel through the + 90
° phase shifter 46 and to the RF channel through the 0 ° phase shifter 42. The outputs of the
FL and FR phase shifters 58 and 40 are connected via the preeder resistor 48 f'L, LP and R, the
outputs of the phase shifters 36 and 42 are connected via the preder resistor 50 n1 further the
BL and BR phase shifters The outputs of 64 and 46 are connected via a preader resistor 52. As
shown in FIG. 4 (B) K, this phase has a phase difference of 900 between LP and BL, and between
RF and BL, but in particular, the phase difference of the output on the front side is The
purpose is to ensure localization and to set the phase difference between BL and BL on the rear
side to 00, and to reproduce the Hall acoustic effect.
FIGS. 5 ('A) and 5 (B) show a sixth embodiment of the present invention in which the phase
difference between the front four outputs and the rear difference between the four outputs are
all 00, respectively. The example aL'B 'signal is connected to the BL channel through a 900 phase
shifter 54 and to the channel through a 00 phase thick 58. The L and / signals are connected to
the LBB channel via a 90 ° phase shifter 56 and to the FL channel via a 00 phase shifter 60. The
RF / signal is connected to the FR channel through 0 ° phase shifter 62 and RB channel through
+900 phase shifter 66. The RB1 signal is connected to the RF channel via the 00 phase shifter 64
and to the BL channel via the + 96 ° phase difalto 8. Between FI and F'R channels, L '? Breen
resistors 70.72.74 and 76 are connected between RF and RF channels, between L, 13 and RB
channels, and between BL and BR channels, respectively. FIG. 5 (B) shows the phase relationship
of the speaker output with such a configuration. FIGS. 6A and 6B show that the phase difference
between the speaker outputs at both corners on the front and rear sides as shown in FIGS. The
fourth embodiment is shown. The phase difference of FLHp'H% BL4-) BR is OQ, but the phase
difference of FL4-> "FXFR, LB-> BL, 33R4- + R: s is 450. The LB / signal is connected to the BL
channel via a 90 ° phase shifter 78 and to the LBB channel via a -450 phase shifter 8o. The -L, /
signal is connected to the LF channel through the -45 DEG 5 phase shifter 82 and to the FL
channel via the 0 DEG phase thick. RF '(No. 1 is connected to the FR channel through 0 ° phase
shifter 86 and to the RF channel through +450 phase thick 88). It is connected to the RBB
channel via the lid 90 at the RB / scratch signal + 45 ° phase and to the BR channel via the + 90
° phase shifter 92. , FL and FR channels are connected with a leader resistance 96, IJB and LIF
channels are connected with a leader resistance 94, RF and RB channels are connected with a
leader resistance 98, and BL and BR are connected with a leader resistance 100. It is done.
According to this configuration, the same localization can be obtained symmetrically in the front,
rear, left, and right. 7 (A) and 7 (B), the resistances 102 and 104 and the resistances 102 and
104 and the resistances 108 and 110 in the embodiment of FIG. A fifth embodiment of the
present invention is shown in which outputs OL and CR are obtained via EndPage: 3.
The phase difference between OL and LP and LB% OR and RF and RB 'is 450 respectively. FIG. 8
shows FLHLF 1 LB6BL% FR → RF during the phase difference output of 450 in the embodiment
of FIG. RB 44 BR [An example in which each channel output is provided by preder resistors 114
and 116.120 and 122.126 and 128.162 and 134 and a buffer amplifier'56 is
shown. (A) shows its circuit diagram, (B) shows its speaker layout. Buffers 118-136 are not
necessarily the same elements as 106 and 112 in FIG.
4. Brief description of the drawings] FIG. 1 and FIG. 2 show the conventional system i, FIGS. 6 to
8 show the multi-channel stereo reproduction system according to the present invention, and
FIG. Is a layout diagram of the speaker, LB /, LF /, R, F /, R'B / is a 4-channel stereo input signal,
LP% Rps 21% FR% SLF% 5 RIF is a speaker on the front side, a signal LB% RB% BL% BRXSLB) SRB
indicates a speaker signal at the rear side. \ R Patent applicants Nagamura Futaka-Human patent
attorney Atsushi Yuasa, 2- (Extra 2 persons) Drawing J) a-2- (1 · '容 1 1' No history. Figure 2 '',
(A), (B) EndPage: 45 List of Appendices (1) One Letter of Proxy (2) One Certificate of Article 30
Paragraph 4 of the Patent Law (3) Specification, 1 (4) Drawing 1 6 Agent address other than the
above, same office procedure amendment (Cabera 1, indication of the case Showa 'year' Egg No.
9 '/ l 7 I-No. dust d ~, l l / active Remajor to 1h '6, the person who makes corrections (relationship
with the case founder's address' 8, N = +! -1 <f へ 7-14 Sacrifice and address Address Tokyo,
Chiyoda-ku, Otemachi, Kencho-chome 2 ′ ′ ′ No. 1 “5, date of correction instruction
EndPage: 5
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