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JPS4883801

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DESCRIPTION JPS4883801
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an electric circuit diagram of one example of a
conventional four-channel sound field display device, and FIGS. 2A to 2 F are display modes of a
Braun tube sound field corresponding to respective channel input signals. FIG. 3 is an electric
circuit diagram of one embodiment of the four-channel sound field display device according to
the present invention, FIG. 4A-D is a display diagram of a Braun tube sound field corresponding
to its in-phase two-channel input signal, FIG. FIGS. 7A to 7C are views of a display area of a CRT
sound field corresponding to a music tooth signal rich in sound field. 15 to 18 иии и и и 4 channel
signal input terminals, E и и и vertical input terminals, 23, 24 и и и и и и и и и и horizontal input terminals.
25, иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
Capacitors, ASW1, SW2 иииииии switch. CL1 / (: 1 ? ? z C dz dz? -4A 3CCL> 'H4 W JCtc & 4'b-'l to
91 / ? / 3 1 1 ? 48-83801 (2) 2 sets (F) cJ, M 3 ? 42 1 ? 48-83801 (3) f-4-solid-3
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an l-channel
sound field display device, and it is usual to recognize the aspect of the room sound field in 4channel reproduction on an oscilloscope so that localization between adjacent channels can be
known together with each level of each channel. It is an object of the present invention to
provide an l-channel sound field display device that can be displayed using a Cathode- ray
oscilloscope. An electric circuit diagram of an example of a conventional reference channel sound
field display device is shown in FIG. The seventh channel signal ch / ???- committee channel
signal CA added to each terminal terminal is respectively connected through a circuit consisting
of capacitors O1-04, resistors 1 ? to R%, and diodes D0 to D. Only the positive side is supplied to
the amplifiers j to t. The amplified n-th positive signal of each channel is supplied to the
oscilloscope 13 and applied to the deflection electrodes 12 to 12 of the cathode ray tube / 41,
respectively. Deflection electrode? Usually, they are arranged in an overlapping and horizontal
relationship, but in this case (?) 4B-838C1? In the case of -03, the deflection electrodes of the
1111 Ys + 's-system are set so as to correspond to the reproduction sound field corresponding to
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the deflections 1a to 12 as shown in FIG. When each signal cAl-the is independently added to the
ladder l-da, respectively, the signal display is localized on the Braun tube / 41 as shown in FIG. 1
(1)-(1). The arrow indicates the direction in which the signal indication line is formed
corresponding to the rise in signal level. When the signals chl and cA3 enter the apparatus at the
same level and in phase, as shown in FIG. 2 (-as shown on the Braun tube display surface / 41, as
in FIG. 2 cN1 (line between ah / and ch3 indicated by a display) It shows that it appears in the
middle of the 1st channel and the 3rd channel. Also, when both signals come in out of phase, the
second Ii! 3 images]] <each 14th ch ,. C-m3 is displayed independently to indicate that nl is not
localized in the middle. The sound field display device of the above configuration is superior as a
display method, but it is necessary to independently add the signal of well known O's a3 ░ -G'J
? Fig-) which is obvious from the circuit of the first If However, it is necessary to use an
amplifier for amplifying the respective signals (J) 4B-83801-04 // and also to use a special Braun
tube, which is disadvantageous in that the apparatus becomes expensive. The present invention
eliminates the above disadvantages and will be described with reference to FIG. FIG. 3 shows an
electrical circuit diagram of one embodiment of a reference channel sound field display device
according to the present invention. ??? It is an input terminal to which each channel signal ch
/ -CA # of each of the D-channels is added.
Capacitors 0 to 0 resistors R5 to B are connected 581 to the terminals lj to / I, respectively. In
the signal path of the seventh channel and the third channel, diodes D5 and D7 are respectively
directly connected in the forward direction to the connection point between the capacitor O6 and
the resistor R5 and the connection point between the capacitor 0 ? and the resistor R7: There is.
Furthermore, the diodes D5 and D7 are respectively connected to the input of the amplifier core
and to the input of the resistor l via the resistors R3 and R11, respectively. amplification! The
outputs of $ 27 and l1 are mtt at the double input positive fik @@ and the horizontal input
positive terminal 3 of the oscilloscope US, respectively. The vertical and horizontal input negative
terminals are connected to ground (Fi, 48-83801-0'5). In the signal paths of the first channel and
the first channel, phase inverters lq and 20 are connected to the connection point of the
capacitor C6 and the resistor R6 and to the connection point of the capacitor 08 and the resistor
R8, respectively. A switch SW and a switch SW2 are respectively inserted on the output side of
the phase inverter / 9 and the core O, and the phase inverter l? , ? can be taken out in phase or
in phase with the input. Diodes D6 and D8 are connected in reverse to the contacts of switches
SW and SW2, respectively. Diodes D6 and D8 are connected to the input of the amplifier and the
core via resistors R and B12, respectively. The connection point between the resistor RR and the
amplifier core is the resistor R ?. ??? The connection point between the resistor RR and the
amplifiers N and 1X '11 is grounded via a resistor "111". There are 1 scope k axis cathode ray
tube Fi vertical axis, 1 horizontal axis ? ? direction KIISJf, kei, 1 fixed, ? d1. Terminal / here!
When the signal ch / ?chlI of the seventh to qth channel 4?-83801-06 (j) is added to P? / I,
respectively, the positive signal of signal 0 person / ? and the negative signal of signal ch11 Are
superimposed, and the negative signal of signal Ch- and the positive signal of signal CAJ are
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superimposed on the vertical input positive terminal-of oscilloscope C, and the O switch is
supplied to horizontal input positive terminal core 3 respectively. When SW1 and SW2 are
connected to the contact point ?, the outputs of the phase inverter / 9 and ? O are in phase
with human power. At this time, when the signals ch / and chJ or the signals CA? and Ch arrive
at the same level and in phase with each other, the respective sound fields on the Braun tube 26
are localized, and the true sound which is the central sound field of the signals rh / and chJ. A
bright line appears in the upper direction or just below the central sound field of the signals ch2
and chu.
FIG. 4 (4) shows a mode in which the sound field is localized and displayed when the signals Ch /
and chJ arrive at the same level and phase. However, even if the signal ch / and chJ or the signal
C3 and the signal C3 come in the same level and phase, the sound field on the Braun tube is not
localized and the signal cA / and chJ or the signal C3 and ah Corresponding bright lines appear
independently for each channel. Fig. 2 (2) shows that the sound field is not localized when the
signals cA / and chJ are input at the same level (4) 4S-83801-1?7 phase, and the emission lines
corresponding to the signal ch / and CAJ become independent. Show an aspect of displaying.
Therefore, in this case, the switch SW, SV2 is connected by switching the contact AK. The phase
inverter / de, J (the output of 7 is in antiphase relation with the input. At this time, depending on
switching of the switches SW1 and SW2, the signals ch / and ch3. Since the phase relationship
between the signals chJ and cJh does not change, when the signals ch / and CAJ, and CAJ and CA
# are at the same level and in phase as described above, the central sound field is either upward
or downward. A bright line appears in the direction and the sound field above the CRT 4 is
localized. Fig. 4 (@ shows a mode in which the sound field is localized and displayed when the
signals ch / and ckJ are at the same level and in phase at the switch jw, 8W2 at the contact jK
switching hole, owt before switching * V; same as the display mode on the cathode ray tube ? ?
? shown in n 1 (4). When the signals ck / and CAJ, and the signals chJ and cal are at the same
level and in phase, 1 switch sw1 and sw2 switch to 1 switch k each system phase relationship is i
? switch connection to contact a tro 0 shift, positive terminal cono 1 negative ? 1714G-838CI?
Since the positive and negative signals supplied to the -08 pole terminal core 3 are in phase with
each other, the sound field on the CRT 4 is localized and the signal ck / and ah co or the center
sound field of the signals chJ and ch just beside A bright line appears in the direction. FIG. 1 (1
shows a mode in which the sound field is localized and displayed by a bright line in the left
lateral direction when the signals cA / and CAJ arrive at the same level and phase. Therefore the
terminal /! When a rich music source signal is connected to each channel by ~ / r and the
localized sound is displayed only in the front-back direction ([1 direct direction) corresponding to
the CRT channel 4 upper channel reproduction sound field, The switch swsw may be connected
to the contact point ?, and when the 1% 2 channel signals Ch / ?ch 4 I are received, the
forward direction C just upward direction on the cylindrical tube ? 6 as shown in FIG. And a
display by a bright line is made within a range opened at a dull angle in the backward direction
(directly below).
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In the case where localization is performed in the direction of chair n in the front-rear direction
(overlay direction) and the left-right direction (horizontal direction) to perform the next display,
the switch 8W and B112 may be connected to the contacts. As shown in FIG. S (2), a person of
signal chlwch Da, 4s-83807-09 has a light S within a range of llj 'in the leftward and rightward
directions as shown in FIG. <No display on the screen, no sync signal on the channel in contact
with the sea junction O sound field display on the cathode ray tube roller is localized and
displayed in the middle, and the sound field display in all directions is one with the playback
Maebashi Will be done. For example, in the case of a music source in which a singer or the like
sings around the listener (see Fig. 5 (the Braun tube, the bright line on the 26 ░ rotates its scrap
around the center 0 as shown in Fig. 5). It is possible to clearly know the reproduction sound
field O localization position moving with time. As described above, according to the da-channel
sound field display device according to the present invention, the localization in the back and
forth and left and right directions in the tunnel sound field and the relationship between adjacent
channels can be clearly displayed, and the amplifier has a double input system and The
horizontal input system is characterized in that it is sufficient to use only A / [each, and the
circuit is simplified and can be configured at extremely low cost.
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