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JPS564079

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DESCRIPTION JPS564079
■ Three-dimensional recording and reproducing method and its apparatus and record board
App. No. 47-5264 ■ Japanese Patent Application No. 43-65104 [Phase] Application No. 43
(1968) Sept. 11 @ Kaoru Kamiya [Phase] Agent Patent Attorney Minoru Nakano (The applicant is
ready for assignment or licensing. )
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an enlarged front view showing the
relationship between a sound groove and a needle according to a conventionally known stereo
system, and FIG. 2 is a diagram showing the related structure of a sound groove and a needle
according to the present invention Its front, b is its side, C is an enlarged view of its plane, FIG. 3
is the operation explanation of the needle tip according to the present invention, a is its front, b is
its side, C is an enlarged view of its front, FIG. Both a and b are vector diagrams showing the
direction of the amplitude according to the conventional method, and c is a vector diagram
according to the present invention, FIG. 5 is a front view of the regenerating needle used in the
method of the present invention, and FIG. FIG. 7 is a schematic view of a recording system, and
FIG. 8 is a schematic view of a reproduction system.
DETAILED DESCRIPTION OF THE INVENTION The present invention aims to further enhance the
three-dimensional effect by adding the spread in the longitudinal direction to the conventional
planar three-dimensional effect. Recording and playback methods using conventional records are
generally classified into a single system called monaural and a binary system called stereo, and
there was nothing other than to use multiple recording tapes or films etc. for more than multiple
recording and playback. . Therefore, the stereo effect in the case of recording and reproduction
by stereo record has remained in [111111] with a horizontal planar spread. However, the real
sound in the sound field is generated not only in the lateral direction but also in the height
direction. When recording and reproducing such a sound only in the lateral direction The sense
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of reality is transmitted to the human hearing as being somewhat different from the stereoscopic
sense of reality. The present invention is intended to record and reproduce a three-dimensional
sound in which a vibration element is added to the vibration element for recording and
reproducing the horizontal width of the prior art to generate the vertical spread, and three
directional microphones or integer multiples thereof are used. Arranged at each vertex of the
triangle to record the sound emitted from the sound source, and in the case of playback, arrange
as many speakers as the same number or integer multiples of the microphone arrangement used
for recording, In the recording / reproduction of the second embodiment, the inclination of the
needle in the direction of the sound groove orthogonal to both the inclined surfaces of the sound
groove and the sound groove is used as the third recording / reproducing vibration element,
thereby having a spread in the vertical and horizontal directions It is characterized in that threedimensional sound is recorded and reproduced. Hereinafter, embodiments of the present
invention will be described with reference to the drawings. FIG. 7 shows the situation in the case
of recording the sound emitted from the sound source. That is, three directional microphones d,
e, f or integer multiples thereof are disposed at positions of vertices of an isosceles triangle or an
equilateral triangle on a vertical plane facing the sound source. e, f are amplifiers a, b, c and
oscillator a /. bl and c / are connected. The electric signals recorded in the respective
microphones d, e, f are separately transmitted to the oscillators 4 + b ′ ′ ′ through the
respective amplifiers a, b, c, and the electric signals are transmitted in the respective oscillators a
/, bl, c ′. Is converted into mechanical vibration, and is recorded as a three-system recording
vibration element described later in the sound groove of the record surface 1 rotated at a low
speed by the sound recording needle 2. However, the above explanation only shows the
theoretical recording principle, and in reality, sound is recorded from a sound collection element
such as a microphone to three tracks such as a tape, and this signal is recorded on the record by
the above method. System recording [111111] EndPage: 1 is performed.
FIG. 8 shows the situation in the case where the sound is reproduced from the recorded record
board 1. In the case of reproduction, when the reproducing needle 2 is relatively slid along the
sound groove of the record disc 1 recorded completely reverse to the above, the reproduction
needle 2 records three types of recordings from the sound groove of the record disc 1 Three
types of vibration are obtained in contact with the vibrating element, and three piezoelectric
electrons a ′ ′ provided with the three types of vibration in the cartridge. In addition to b ", C"
separately, this is converted into an electrical signal and transmitted to the speakers dl, e /, f / via
the amplification devices al, bl, c /. The speakers d /, e / and f / are arranged at the respective
apexes of triangles identical or similar to the arrangement of the directional microphones d, e
and f shown in FIG. The three-dimensional sound is reproduced by synthesizing the sound
emitted more. In the case of the embodiment, by combining the sounds emitted from the
speakers d 'and c' located at the base of the triangle, a three-dimensional sound spreading in the
lateral direction is obtained, and the sound emitted from the speaker f located above the center is
additionally added to this. As a result, it is possible to obtain a three-dimensional sound effect
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having a spread in the vertical and horizontal directions. Next, the recording and reproduction
modes on the recording board will be specifically described. FIG. 1 shows the relationship
between a conventional stereo 45-45 style needle and a sound groove. It is known that two types
of recording and reproduction vibration elements are recorded and reproduced on two planes X
and Y each having an angular difference of 45 ° with respect to the center line 0 of the record
groove. FIG. 2 and FIG. 3 show the relationship between the needle and the sound groove which
form the main part of the present invention. First, Fig. 2a is a front view showing the mechanical
relationship between the needle and the sound groove, but in the conventional stereo shown in
Fig. 1, a 90 ° needle is used for recording but generally for reproduction. Using a 60 ° needle,
the contact surface between the sound groove and the needle is often point contact. Although
this has various effects in sound reproduction, the pressure on the other side is excessive and it
is deformed into surface contact in a relatively short time, which causes the sound efficiency to
be significantly reduced. However, in the present invention, three recording vibration elements
are incorporated in the sound groove of one record disc, and the first and second recording
vibration elements form an angle of 45 ° with each other as in the prior art. In addition to
recording on the two planes X and Y of the cross section of the V horn groove, the inverted
posture of the needle with respect to the sound groove is used as the third recording vibration
element, and the needle and the sound groove are shown in FIG. As shown in the above, it does
not make sense unless it is a line contact or a multipoint contact of two or more points with
respect to the recording surface [1111111 of the sound groove. Reproduction using such a
needle also has an advantage of being able to maintain the recording accuracy long lastingly to
abrasion as well as the main effect.
Next b is its side view, again c showing its plane. It is desirable that the needle used in the
present invention be an elliptical needle at the tip of both recording and reproduction. This is
because the use of an elliptical needle whose major axis is orthogonal to the traveling direction
can greatly expand the frequency range of recording and reproduction. However, it is not natural
that it can not be implemented unless it is an elliptical needle. Of course, circular needles are
naturally included in the present invention as they also differ depending on the diameter of the
needles. Subsequently, FIG. 3 is an explanatory view showing the operating condition of the
needle and the sound groove, where a is a front view, and recording and reproducing both X and
Y as two vibration elements is a conventional method and There is no difference. However, also
in the side view shown in FIG. 2B, describing how the third sound recording vibration element is,
the rotation of the record causes the needle to receive lateral pressure in the same direction by
contact friction with the sound groove. Therefore, the support of the needle is configured so that
the inclination of the needle can be freely maintained in a certain range of inclination angle
elastically with respect to the perpendicular. In this case, it is experimentally found that it is best
to set the maximum value of θ at around 15 ° from the perpendicular 0. In addition, taking the
inclination angle θ on one side θ, or both sides θ and θI of the perpendicular 0 is also a
mechanical problem and is free. FIG. 3C is a front view of the same needle and sound groove as a,
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but is an explanatory view showing the difference between the X and Y vibrations shown in a and
the Z vibration according to the present invention; Vibration Theoretically, it is vibration in a
plane orthogonal to the sound groove traveling axis composed of X and Y, whereas Z / vibration
is vibration in b plane shown in b. The three vibrations are therefore each having a completely
different direction which is orthogonal. Therefore, the movement of the needle caused by
following the waveform of the sound groove is separated into vibrating elements in the Xl, yl and
z 'directions. Further, the relationship between the needle and the sound groove in the
implementation situation will be described again with reference to FIG. 3. First, in the case of
recording, the recording needle 2 is brought into contact with the rotating record 1 and three
different systems as described later The sound is converted to the same number of machines
[111111] EndPage: 2 mechanical vibration by three oscillators that operate through the sound
and electric system: 2 sound recording planes X and Y on the left and right of the sound groove,
and the sound groove direction of both A change in the inclination angle θ of the wave of the
waveform is recorded as Z as a third recording vibration element. For example, when the
vibration of this recording needle (cutter) is tilted by θ angle in the groove direction (the
advancing direction of the record), the cross-sectional shape of the groove formed by the X and Y
planes becomes 90 ° C. The sound grooves, that is, the waveforms of the recording surfaces X
and Y, which are engraved in the direction orthogonal to the grooves, are engraved in an inclined
state.
That is, what 71 [1! As a result, although the X and Y waveforms change T, the changed
waveform becomes a normal waveform for reproducing the vibration at the time of recording. Of
course, the recording needle may first be inclined and configured to be upright by a change in
vibration. Next, in the case of playback, exactly the opposite operation occurs, and the three
recording planes X recorded as described above. When sliding the playback needle 2 in contact
with Y and Z at a constant speed in the direction of the sound groove, the vibration transmission
of the left and right recording surfaces X and Y is the same as the conventional stereo system,
but the third recording vibration element Z is Since the recording is performed using the change
in the inclination angle of the recording surface X, Y, in the case of reproduction, the traveling
resistance of the needle at each point naturally changes according to the waveform inscribed in
the sound groove of the record . The needle tilts back and forth according to the magnitude of
this traveling resistance, and at the same time, the recording surface X. Since it changes up and
down according to the waveform of y, it is possible to reproduce sound in three directions by
separating the vibration of the movement x /, y /, z / of this needle. The vibrating element in the
direction of the groove of the recording board is not a special component, but is an oscillating
element that inevitably occurs on the record needle when the sound is reproduced from the
recording board. That is, as long as the unevenness is formed in the sound groove, if the needle is
made to conform to this waveform, the needle is elastically supported in the front and back
direction, so the running resistance is received from the unevenness of the waveform and
Vibrate. In the present invention, the vibration 2 'in the back and forth direction of the needle is
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taken out as a change in inclination of the needle. Although the present invention modulates the
x /, y / torsional vibration waveform without it by this z / fold signal addition and cuts it into the
sound groove, the actual x, which is carved by the z / fold signal addition. Since the waveform of
the y-plane is a combination of three elements, it is possible to reversibly reproduce the sound at
the time of recording by making the needle follow the waveform. This principle is explained by
FIG. That is, FIG. 4 is an amplitude vector diagram of the needle tip showing the difference
between the present invention and the conventional method [1111111. a represents a
conventional monaural system, Q represents a vertical direction, and P represents a horizontal
amplitude vector. According to the monaural system, the vibration of the needle is unified, and
the sound recorded on one side can be taken out by this vibration. b is a conventional stereo
system, and shows 45-45 oblique diagonal vectors R and S of mutually orthogonal amplitudes.
Since both vectors R and S are orthogonal to each other, they do not theoretically interfere with
each other. Reference numeral 0 denotes an amplitude vector applied to the method of the
present invention, and in addition to the amplitude vectors R and S in the directions orthogonal
to each other shown in the drawing, a third vector T orthogonal to both vectors R and S is shown.
It is what I took in.
Since the three vectors R, S, and T are orthogonal to one another, they do not theoretically
interfere with one another. Therefore, the Z vibration can be recorded and reproduced as a sound
separate from the X and Y vibrations by matching the vibration direction of the needle as much
as possible to the direction of the vector T. The direction of this vector T is the direction
orthogonal to the cross section of the sound groove, that is, the traveling direction of the sound
groove, and this direction is the only one that can be adopted when the third recording /
reproducing vibration element is incorporated into the record groove again. It is a direction. An
embodiment of the regeneration needle suitable for this invention system is shown in FIGS. The
regeneration needle has a protrusion 4 integrally integrally provided on the support 3 of the
needle 2 supported on the cartridge by an elastic member or the like (not shown), and one
protrusion in a direction orthogonal to the left and right direction. 4ν are integrally provided,
and each contact the piezoelectric element 6 via an armature. Moreover, the needle 2 is
configured to be given a tendency by the spring 7 to always tilt the needle tip in the direction
opposite to the advancing direction of the record 1. According to this configuration, the hand 2
causes left and right vibrations with respect to the sound groove along the waveform of the
recording surface X, Y of the record, and the V-shaped sound groove due to the progressive
change of the waveform of the recording surface X, Y Vibration is induced in the direction of and
can be regenerated. Of course, it goes without saying that the reproduction apparatus is adopted
in the form of a ridge. As described above, according to the present invention, the microphones
are disposed at the positions of the vertices of the triangle, and the sounds emitted from the
sound source are separately recorded, converted into mechanical vibrations, and within one
sound groove of the record board. Three-direction mechanical [111111] EndPage: three-wave
waveform is engraved in the case of reproduction, in the case of reproduction separated three
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waveforms from the sound groove of the record board, it is converted into an electrical signal, It
generates sound from three speakers installed at the same or similar positions as the above
microphones, or from an integral multiple of the speakers, and has a sound spread in the vertical
and horizontal directions, unlike the conventional horizontal sound spread. It is possible to
perform three-dimensional sound reproduction. In the present invention, in addition to the planes
X and Y having their own differences with respect to the center line of the sound groove of the
recording disc, the groove direction of the first and second recording and reproducing vibration
elements with respect to the sound groove direction In order to record the third recording /
reproducing vibration element by the change in inclination, recording and reproduction of three
kinds of recording / reproducing vibration elements of one sound groove are enabled, and
furthermore, the recording / reproducing of the third recording vibration element is performed
first, Using the change of the inclination angle θ of the recording surfaces X and Y by the second
vibration element, the reproducing needle 2 vibrates while being inclined in the groove direction
according to the inclination angle of the waveform to perform recording and reproduction it can.
When sound from the sound source is simultaneously recorded by the microphones d, e, f,
recording in the Z direction is the inclination of the needle relative to the sound groove direction
of the waveform on the recording surfaces X, Y of the front two parties. When recording is
performed only in the Z direction, a hidashi is formed on the recording surfaces X and Y,
which is inclined in the advancing direction of the groove by the deflection direction of the
advancing direction of the needle. When the needle is made to follow along the groove,
resistance is received from this "fold", and a shake in the back and forth direction along the
direction of the sound groove occurs in the needle, and the amplitude varies depending on the
magnitude of the resistance. The sound in the Z direction can be reproduced by extracting the
direction of the shake (horizontal component). The shake of the needle in the Z direction is the
same as the shake of the X and Y planes, and it is all (reversible) at the time of recording and
playback. There is no problem in practical use, and three-dimensional sound can be reproduced.
As described above, according to the present invention, it is possible to record and reproduce
three-dimensional sound much more than the conventional Srlllllll Teleo system.
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