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Ming Ita Book 1, Name of Invention
1gg converter
3. Detailed Description of the Invention The present invention is a sound image from a signal that
does not have redundancy information t-signal when converting a signal that is not a M signal
into a binaural signal, which is 9iS in a 1g summer device and does not have a M signal. J: 距,
sound image to configure direction information into a separate circuit, in a distance Q between
the specific position in the space intended to localize the sound and the listener EndPage: 1 It is
an object of the present invention to provide a D / A converter which can control the position of
the point on the surface and, in particular, the circuit can be configured more easily as the
number of signals which are not localized at all. Hereinafter, the Tani Ko dance example of the
non-invention device will be described with reference to the drawings. FIG. 1 is a private view
showing the positional relationship between a single sound source and a listener. The single
sound source x (tl exists in the pressure diagonally forward of the receiving 4 肴 M. Now,
assuming that the front direction of the listener M is 7 00, the f source signal x (tl which reaches
the space from the single sound source located at the angle θ and the distance sr reaches the
entrance of the listener Mo left ear Let hz (t: θ, r) be the transmission characteristic until
reaching the right ear entrance of the listener M-ff sex 1 ha (t; θor), the hill ear entrance and the
right ear of the listener M The signal eL (tl and eR + t) at the inlet is largely expressed by the
following equation using convolution integration. Japanese Patent Application Laid-Open No. 53137102 (2): 10,000, no localized fPt signal (for example, a monaural signal or each individual
channel signal of multiple channels), as in the case of pinosil 46 obtained by pseudo-following Of
the signal f to convert to pinola / l /, ii, s, (tlls, (tl, the listener M can detect the sound source x (tl
Must be established. The equation (1) is substituted into the equation (2). Here, when the concept
of the distance firK standard distance ro between the listener M and the sound source is
introduced, the equation (3) is rewritten as the following equation. The formula (4) 'ie Igl road
411 is completed as follows. x h R (t; θ? ro) In the equations (5-2) and (5-2), (hL (!: & t ', r) /' hL
(t; θ, ro-) is the sound source X (tl , The sound source of the listener M, the change in the
transmission characteristics to the population of 10,000 ears, the change in the distance by 6
minutes. The signal g corresponding to this equation can be obtained by the attenuator and the
filter. However, in the case where the distance lIr is larger than 2 m, a so-called inverse square
characteristic in which the level attenuates in inverse proportion to the square of the distance
can be configured with only the attenuator.
The term can be expressed as a change in the I5r sub-interaural running characteristic with
respect to the distance change, and can be expressed as a pressure difference or a time
difference, but the time, the di / 'difference generally hardly changes, and the signal of the
transfer characteristic corresponding to this term Can be configured with an attenuator and a
filter. However, when the distance r is larger than 2 m, the transfer characteristic of this term is
l # , and it is not necessary to consider. The device according to the present invention is such
that the transfer characteristics relating to the two above-mentioned two rights can be applied to
the first signal conversion circuit described later. Moreover, hR (t; θ, ro) in hL (t; θ, r0) and (5-2)
in the equation (5-1) is a standard distance r. Is a term giving information on the localization
direction θ, and 侶 g corresponding to this term can be obtained by a circuit composed of an
attenuator, a filter, a delay circuit, etc. as conventionally known. In the device of the present
invention, this characteristic is obtained by the second signal conversion circuit, which will be
described later. FIG. 2 shows a block diagram of the first embodiment of the device of the present
invention. In the figure, l is localization information t-Wt, not a single sound source! −1 tX (at
the input terminal where tl comes in, this signal x (t) is supplied to the attenuator 2 Kig. The
signal x (t1 is a signal obtained by applying an attenuation according to the distance rEndPage: 2
and extracted from the attenuator 2) (t is an L9 predetermined frequency time t-weight applied
to the filter 3, the output terminal 6 and the attenuator 4 is supplied. The 1g issue x (t) with C
given the characteristic of (hL, (11θ * r) / hL (t; θtrg)) from this fill 3 is output. The signal,
which has been reduced by a predetermined amount by the attenuator 4, is supplied to the filter
5, where it is imparted with a predetermined frequency type property, from which it is taken out
as a signal recorded as the output signal of the filter 3 and output to the output terminal 7. Led.
The first signal processing circuit that gives the distance ufn information of the above-mentioned
temperament localization position, the above-mentioned 6 attenuators 2 and 4 and the filters 3
and 5 in large scale, 0 output 0 No. 10 is supplied to the signal processing circuit 11 including
the filter through the input terminal 9, where a predetermined frequency type time property is
given to the hL (t; sr (1) fL 峙 峙It is led to the unplugged output terminal 14 given the property.
Therefore, the output terminal enolall signal is output. 10,000, the output terminal 7 to 9 signal
taken out is through the input terminal 10, and it is 41ft that carries out a roundabout signal
processing time w! ! 12, and is given a predetermined frequency timing, and is given an axial
property of (t: θtro), and is then led to the output terminal 15.
Accordingly, (a pinaural signal 5R (t; θsr) satisfying (5-phantom) is output from the output
terminal 15. However, if the direction intended to make one sound 1 # 11 fixed is the right half
from the front of the listener, the signal processing circuit 11 is configured to include a delay
circuit. Are configured to include a delay circuit. As apparent from the above description, the
signal processing circuit 11.12 constitutes a second signal processing circuit for giving
information on the localization direction of the sound image localization position. The listener is
the above Bino 2A signal s, (t; θ, r). 5H (t: a, r) t-The distance r shown in FIG. 1 by simultaneously
making a left ear and a right ear @ by means of headphones at the same time. It is possible to
sense that tS is localized at an angle θ and φ is felt. In addition, in order to be in the same state
as listening to a binaural signal with headphones, strike a large amount of crosstalk that occurs
between the speaker, the pressure source and the listener's both ears emitted from the speaker in
advance. Time to erase #! By using r, the listener is emitted from the speaker in the sight, and his
/ her own Pinora / l / signal S1. (J: θe '); 5B (t: θ, r) t-11g Even with the lifting platform, it can
be felt that the sound image is localized at a predetermined position in the dark that is intended
beforehand. Of course. FIG. 3 shows a block diagram of an embodiment of 4e for converting a
human power signal without multi-channel localization information t ′ ′ into a pinaural signal
using the device of the present invention. In the figure, the same parts as in FIG. 1. .., L are valley
input terminals of three signals having no localization information, and the first signal circuit
1318. 〜18. Great connection to First g-number conversion circuit 18. 〜18. Is the same
circuit configuration 69, and each circuit is oJ variable attenuation 62 '* 4', variable filter 3 '. 5 ',
the image position control signal generation fct 16 and the switching unit 17 are formed VS. ,
Sound image position control signal generation unit [16 generates control signals 0 ° to o, ' The
timing of each block of Cp2 'to 5' is changed to ˜ 04 to f1! 41! The control signal 05 is
supplied to the switch 17 while arbitrarily changing the position distance 1lilr by -I. The switch
17 is a 5 g 20 value conversion circuit 13 configured to give a positional direction habit of the
forefoot of people in advance, the output signal of the output terminal Of the intended
localization direction lft @ is output according to the control signal 05.
The first one! * F 俟 circuit 182118. Similarly, the second signal rhombus circuit 13. 〜13.
Greatly supplied to any Lgl path of Second signal conversion Igl path 13. 〜13. The pinaural
signal to be transmitted to the left ear of the listener among the output signals of the receiver is
supplied to the mixer 19 to be transmitted 10,000 and the pinaural signal to be transmitted to
the right ear of the listener is a mixer. The mixture is fed to 20 and mixed. The output signal of
the mixer 19 ° 20 is a binaural signal sxb (t; θ, r) to be finally heard by the listener's ear-right
ear. EndPage: The output terminal 14.15 is outputted as 35 × R (t; θsr). Thus, the device
according to the present invention provides the first double g conversion circuit for providing
distance information of the backlash position, the same number as the number of input signals to
be provided with the localization T # signal, and the first signal conversion The second signal
conversion circuits for giving the localization signal i1 of the position of 廿 gR to the output
signal of the circuit in the history may be provided as many as necessary for the intended one for
localization, and the circuit configuration becomes simple . FIG. 4 is a block diagram of Abe's
practical example of the apparatus of the present invention. In the figure, the same reference
numerals as in FIG. 2 denote the same parts as in FIG. 2, and a description thereof will be
omitted. FIG. 4 is a block diagram of a second signal conversion circuit, which is a signal
processing circuit having the characteristics of a plurality of predetermined n buildings. 311. 11
nj 12. .About.12 oe, the signal processing circuit 11. 〜11. The respective output terminals of
are commonly connected to the output terminal 14, and the signal processing circuit # 12. The 12 ° valley output terminals are connected to the cascaded delay circuits 21, ˜ 21 ° ship pillow
points. Incoming to Force Terminal 9L An incoming signal is supplied to the circuit of any one of
the signal processing circuits 11 DEG -52-137102 (4) to 11n by the switch S. Further,-10,000. A
signal received from the input terminal lO is processed by the 1N signal processing circuit 12 by
the switch S2. It is supplied to any one circuit of ˜ 12 o. スイッチS、、S2は1. It is
configured to be delayed and switched according to the localization direction. The signal
processing circuit 11. 〜11. Is a circuit for obtaining a deposit of hL (t; θ5r (4)), and signal
processing circuits 12. to 12n are circuits for obtaining an additivity of hR (t; 0. ro). By the way,
hB (t; 0.r) / hLct; θsr) has a time difference, and its habit is due to the localization direction 〇! It
becomes A, but the case of θ = 90 'becomes maximum. Accordingly, in this case, the delay times
τ and τ of the delay circuits 211 to 2io.
The signal processing circuit 12 only for the time of the sum of. Output signal is delayed. In the
case of θ <90 °, it is necessary to share the delay circuits 212 to 21 o 1 with a desired delay
time that is simple j! ! It can be obtained by the configuration and thus can be configured
inexpensively. The localization direction becomes rhomboid according to this delay time.
According to this embodiment, even in the case where there are a plurality of input-signals to
which the localization information should be given, the second signal conversion circuit jii 8 may
be only one circuit shown in FIG. The switches S, S2 are the third switch shown in FIG. Used for
the same purpose. As described above, the signal summer line device according to the present
invention uses a signal that does not have localization debris @ as a human power signal, gives
this signal the localization position of the sound image and extermination information of the
darkness of the listener, and outputs it. A second signal conversion circuit that receives an output
signal of the first signal conversion circuit as an external power source, gives information on the
localization position of the sound image to the signal between the listener and the signal, and
outputs the signal as a pinaural signal Since the circuit and the circuit are composed in four,
binaural signal 11 having no localization information is recorded using a microphone (a so-called
on microphone) placed at a position close to the valley source instead of the pseudo head. When
obtaining the sound 11i foot position information @, not only the localization direction but also
the sense of distance can be given to the listener, and the sound image localization position is
arbitrarily set by changing the characteristics of the first signal conversion circuit. In the position
of In addition, when the 1g which can be moved and does not have the above-mentioned
localization information * t-no gathers, the first signal conversion circuit is provided by a number
equal to this number, and the first signal By providing a means for switching the output signal of
the conversion circuit according to the localization direction, the second signal conversion circuit
can convert and output a pinaural signal independently of the number of input signals, so that
the Jo path compensation can be reduced. In addition, the delay circuit constituting a private
circuit to the upper-self second signal and a plurality of delay circuits are connected in cascade,
and it is intended to localize the sound source. Can be configured to supply the output signal of
the first signal conversion circuit to the power of any one delay circuit of the plurality of delay
circuits corresponding to Share some expensive delay circuits Possible for those having features
t- such inexpensively configured. 4.1 A scale factor explanation of the plane Fig. 1 is a schematic
diagram showing an example of the positional relationship between a single sound source and a
listener, Fig. 2 is a block system diagram of an example of the device of the present invention 3
実 施 does not M EndPage: 4 'N 定位 2 定位 定位 1 報 # using the present invention # C 3 block
yarn anti of one example in the case of converting three input value g into a pinhole signal FIG. 4
is a block diagram of the main part of the second embodiment of the present invention at.
1.1. 〜1. ... Signal that does not have localization information @. Input terminals 2, 4 ...
attenuators 3, 5 ... filters 8.18. 〜18. ... 1st signal conversion time. Road 13, 13. 〜13. @ ··
Second signal conversion circuit, 14.15 ··· Binaural signal output terminal, 16
··············································································································· 21 ・・・、+!! Circuit. JP 53-137
102 (5) FIG. 1-FIG. 5