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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing a conventional
sound collecting method, FIG. 2 is a schematic diagram showing an example of a reproduction
state of the sound collecting signal, and FIG. FIG. 4 is a similar layout showing another
embodiment of the present invention, and FIG. 4 is a similar layout showing another embodiment
of the signal processing apparatus according to the present invention. In the drawing k, 1 is a
sound source group, ML1 and MR1 are direct sound collecting microphones ML2tMR2
respectively reverberation sound collecting microphones, SPO is a front center skier, SPLeSPR is
a left and right skiker, and 3 is a listener. Fig. 1-One actual application. (2) Fig. 2 Fig. 3 1 + e 尉 (e
飄-KeBN) 68 · C. 10 θ ') aL-Nf! 6g) Fig.4-2-47: 216 o1 (3) Correction: correction 46430 Fig. 4 is
corrected as follows. Figure 4 3
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stereo signal
processing device, in particular of the musical note! It is intended to clarify the position. As
shown in Figure 1 as one of the sound collection methods for stereo signals, main microphones
ML1 and M □ 1 with single-phase characteristics are opposed to the bass group + IIK to pick up
the WL horns of the left and right side as well as the sound source Set up auxiliary microphones
ML2 and MR2 that pick up echoes and reverberations away from group (1) and divide echoes or
reverberations reflected from the wall of the hall wall (2) into left and right components of the
hall and collect them Blue and auxiliary microphones ML2 and 'R11's signals · BL and · B □ are
mixed with the main microphones ML □ and MR units signals DL and • D □, respectively, so
that the left direct sound signals · DL and so on. Left signal-1! SL and the right (1; 147-2.160102. There is a prior scheme in which the right signal 8R consisting of 'II' (i's [箒 [II 箒 sound
signal D と and reverberation signal ス テ レ オ BR] as a stereo signal is recorded on the 1 ll
recording disc or the magnetic tape KV. . On the other hand, as one of the methods of
reproducing the 6x Dereo signal, a speaker 示 す is employed which is indicated as a factor j.
That is, listeners (3: both central speakers 8Po in front of them and left speakers BPL-right
speakers 8PR are arranged on the left and right (left and right speakers 8PL, 8PR # -i). The
center speaker 8PcK supplies left and right signals 8L + 81, and the left and right speakers PL
and BP'RT / C supply left and right signals 4 + 8L and 8 respectively to perform stereo
reproduction. According to such a whistle sound reproduction method, there is an advantage that
a stereo signal to which a remnant sound has been added can be reproduced and a hall feeling
with a spread can be reproduced. However, there is a drawback that the localization of a small
amount of sound (the position of the sound source) becomes unclear when this left-right signal
including the reverberation component is reproduced by this speaker arrangement (in the front
center speaker). Since the present invention is a book that aims to clear up such a drawback, the
following 11 are considered! Draw a travel example and explain it in detail. In this proposal, a
phase inversion circuit (3 m) (sb) is provided at the bottom of the figure 3 as shown in Fig. 3. A
part of the reverberation component of the auxiliary microphones L2 and R2 is a binary phase
inversion circuit (3 a) (7) through the (sb) to the signal system of antagonism, respectively 7 to
make a ridge supporting negative four-stalk with respect to the reverberation-t ^, at the time of
reproduction both central speakers 8 PC and odor residual sound components are not emitted as
much as possible Serve in a bowl. That is, the 7E $ signal 8L% 8P + to be transmitted is 8LxteBL
+ (eBL- "BR)-...----m8n 戴 eDn + (eBR-KeBL) ..... 2) where K represents the attenuation in the phase
inversion circuit (3a) (3b) K and is 0 (K (l of l), so the center speaker 5 pctcri 8 L + 8B-eDL + * D,
+ (1-K) ( , OBL + eBL)----(3 + mixed signal 併 f1 residual sound component (eBL "" Bh) ri (1-K)
times · 5 · 11 Hatsune · · ·.
□ + 0 °, compared with -4 〒 \ J enough-メ 中央 メ メ PC PC PC 略 略 略 略 略 略 略 略 略 略 略
為 為 為 為 為 為 為 為 為 為 為. The left and right speakers spt and 8P1j are supplied with the
left and right signals shown in the above expression 1 and the quality, and the reverberation acid
content thereof is (.IIL-x @ B,) and (.B @[email protected]@@@ IB1. ) 11I, because of the nature of the left and
right residuals, ..., and 31 holes reverberation amount, not only there is a level difference but also
a phase difference, and rather that the phase relationship is almost random JR Oru. The left and
right speakers 8PL and BPR are reproduced, and the reverberation component is reproduced
without being erased sufficiently, and a hall feeling can be realized F). 4I El shows another
embodiment of the present invention, and in this IPm, the case where the reverberation sound
collecting microphone is set to 1 is shown, and the signal e1 from this miter pigeon is otted to
one channel. The other channel is mixed through a phase inverting circuit (31). In this way, it is
possible to obtain the comrade effect in the case of the above equation Ktk′′rxwx. As
described above, according to the present invention, stereo reproduction can be performed with
a sense of localization with a small amount of sound and a sense of hole due to a residual