close

Вход

Забыли?

вход по аккаунту

JP2007143102

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2007143102
A sensorless bass compensation system includes a two-layer mixing control structure including a
feedforward control unit and a feedback control unit, and a volume velocity estimation observer
(VolumeVelocity Estimation Observer). A volume velocity estimation observer does not need a
sensor because it estimates volume velocity by a dynamic equation and a linear quadratic
Gaussian law. The feedforward controller is incorporated in the digital signal processor, and the
feedback controller by the quantitative feedback technique is incorporated in the analog circuit,
thereby improving the time when the loudspeaker operates. The system has functions of
modeling and filter synthesis automatically. The operating frequency of the loudspeaker can be
reduced, accurate low frequency volume can be obtained in different spaces, and parameter drift
can be suppressed when operating for a long time. [Selected figure] Figure 1
Sensorless bass compensation system
[0001]
The present invention relates to a sensorless bass compensation system, in particular comprising
a two-layer mixing control structure and a volume velocity estimation observer that does not
require a sensor, which can reduce the operating frequency of the loudspeaker and equalize the
volume in different spaces On what is done.
[0002]
China Patent and Publication No. 557,070 Speaker box structure having bass enhancement
effect is a speaker box structure having bass enhancement effect, and in the middle stage, the
08-05-2019
1
inner space of the sound box is up and two parts of the lower chamber are As a partition, a
transverse partition plate is provided in the lateral direction, and an air passage extending to an
upper sound chamber for communicating the two sound chambers is provided between the
upper sound chamber and the lower sound chamber. At least one sound box provided with a
diffusion hole for communicating with the outside of the sound box on the wall, at least one highpitched horn provided on the wall of the upper sound chamber of the sound box, and the upper
sound of the sound box The at least one bass horn provided in the room beside the treble horn
and the at least one mid tone horn provided on the transverse partition of the voice box and
directed to the lower sound room.
The above-mentioned patent enhances the bass by improving the sound box structure, but is not
practical because the sound box takes up space.
[0003]
In addition, the ROC Patent Publication No. 381 1403 "Device and method for bass
enhancement" is a method of transmitting temporary psychoacoustic perception to an audience
as an audio signal, and such a method includes (i) at least an audio signal. Providing a low
frequency signal (LF signal) within a certain low frequency range, and (ii) generating a residual
harmonic signal corresponding to each fundamental frequency within the low frequency range,
respectively in harmonic order, The harmonic order generated based on the frequency, there is a
set of fundamental harmonics, and the set of fundamental harmonics has at least three
continuous harmonics in the set of fundamental harmonics of the fundamental frequency (Iii)
Matching by the volume and the residual harmonic signal, thereby realizing the volume matching
attribute between the residual harmonic signal and the low frequency signal. The above patent
produces a dummy deep bass by adding harmonics according to the principle of psychology, but
the addition of an extra signal affects the sound quality, and the dummy bass is It's not a true
bass.
[0004]
Also, US Patent No. 5,305,388 "Bass compensation circuit for use in sound reproduction device"
is similar to the concept of equalizer as its contents, but it compensates the bass with a high Q
filter. Because there is no consideration of the physical limitations of the single body itself, there
is a risk that the single body operates in a non-linear region.
[0005]
08-05-2019
2
In addition to the above patents, in May 1991 DK Anthony and SJ Elliott et al. Proposed A
comparison of three methods of measurement of sound source velocity (A Comparison of
Three Methods of Measuring the Volume Velocity of an Acoustic Source). The three
measurement methods use a sensor as an aid.
[0006]
The above-mentioned prior art realizes the enhancement of the deep bass and the volume
velocity measurement with the auxiliary sensor, and in the enhancement of the deep bass,
according to the above patent, the improvement of the voice box structure and the harmonics by
psychology principle. Depending on the method of adding a dummy to create a dummy deep
bass and compensating for the bass with a high Q filter, if the improvement of the voice box
structure, space is taken, if it is a dummy deep bass For example, the extra signal affects the
sound quality, and if the high Q filter compensates for the bass, the single object itself becomes
nonlinear beyond the physical limit, and a sensor for measuring the volume velocity I need.
Therefore, it was not practical for the user.
China Patent and Publication No. 557070 Gazette China and Patent Publication Gazette No.
381403 US Patent No. 5305388
[0007]
The main object of the present invention is to provide a sensor-free bass compensation system
that can reduce the operating frequency of a loudspeaker, provide accurate low frequency
loudness in different spaces, and suppress parameter drift when operating over a long period of
time I will provide a.
[0008]
The present invention is a sensorless bass compensation system comprising a two-layer mixing
control structure consisting of a feedforward controller and a feedback controller and a volume
velocity estimation observer in order to achieve the above object.
08-05-2019
3
The volume velocity estimation observer does not need a sensor because it estimates the volume
velocity by the dynamic equation and the linear quadratic Gaussian law. The feedforward
controller, which includes at least one or more filter devices, is embedded in the digital signal
processor, and the feedback controller is embedded in the analog circuit by a quantitative
feedback technique.
[0009]
FIG. 1 is a conceptual view of the basic structure of the present invention. The present invention
is a sensor-free bass compensation system as shown in the figure, and mainly comprises a twolayer hybrid control architecture consisting of a feedforward controller 11 and a feedback
controller 12; And consists of Further, the two-layer mixing control structure can improve the
volume of the loudspeaker 3 particularly in a low frequency region, and the feedforward control
device 11 can be used as a digital signal processor (DSP) 111. Different compensation filter
devices are included to provide built-in bass enhancement and spatial volume equalization, and in
different situations different compensation filter devices can be selected, and the feedback
control device 12 It is a compensator and suppresses noise. Then, since the number of stages
does not increase, it is incorporated in the analog circuit 121 by a quantitative feedback
technique (QFT), the response speed can be increased and the delay can be reduced, and the
volume velocity estimation observer 2 is dynamic. In order to estimate the volume velocity by the
equation and the linear second-order Gauss law, a sensor is not necessary, and the volume
velocity estimation observer 2 is connected to the feedback control device 12 to enhance the
loudspeaker 3 and (Or) stability of spatial volume change is obtained.
[0010]
The system according to the invention can furthermore be connected to a loudspeaker 3, which
comprises an amplifier 31 and a dynamic loudspeaker 32. In the system operation of the present
invention, the sound source signal is transmitted from the feedforward control unit 11
incorporated in the digital signal processing unit 111 to the loudspeaker 3, and the loudspeaker
3 sends the on-circuit voltage and coil current to the volume velocity estimation observer 2.
Further, the calculated coil speed is transmitted to the feedback control unit 12, and the feedback
control unit 12 further transmits one signal to perform compensation filtering with the signal
input from the feed forward control unit 11. , And finally transmit to the loudspeaker 3. The
system has automatic modeling and filter synthesis functions, can obtain accurate low frequency
volume in different space, and can suppress parameter drift when operating for a long time.
08-05-2019
4
[0011]
FIG. 2 is a conceptual curve of volume velocity curves measured by a volume velocity estimation
observer and a laser displacement gauge of the system according to the present invention. As
shown in the figure, the volume velocity is measured in the experiment by the volume velocity
estimation observer and the laser displacement meter of the system according to the present
invention, and in the drawing, the first curve measured by the volume velocity estimation
observer of the system according to the present invention 41 and a second curve 42 measured
by means of a laser displacement meter, the first curve 41 and the second curve 42 substantially
coinciding, which proves that the system according to the invention is practical.
[0012]
FIG. 3 is a curve conceptual diagram of sound pressure measurement according to the present
invention. As shown, when the microphone is located 50 cm in front of the horn of the
loudspeaker, it is a curve of measured sound pressure, and in the figure it has the original first
pressure curve 51 of the loudspeaker and a feedback control device There is a second sound
pressure curve 52 of the loudspeaker, a third sound pressure curve 53 of the loudspeaker with
feedforward control and a fourth sound pressure curve 54 of the loudspeaker with the system
according to the invention, from the figure As can be seen, the system according to the present
invention has the operating frequency in the low frequency region due to the two-layer mixing
control structure, so that the two-layer mixing control structure is stable when the loudspeaker
operates in the low frequency region. Sex can be enhanced and the operating frequency of the
loudspeaker can be reduced.
[0013]
As described above, the sensorless bass compensation system according to the present invention
can lower the operating frequency of the loudspeaker, can accurately obtain low frequency
volume in different spaces, and parameter drift when operating for a long time The patent claims
are filed according to the law because they can effectively eliminate the conventional drawbacks
and are more advanced and practical.
[0014]
The above are merely better embodiments of the present invention, and the present invention is
not limited thereby, and all equivalent changes and modifications in accordance with the
08-05-2019
5
contents of the claims and the specification relating to the present invention are included in the
present invention. It is included in the claims related to the invention.
[0015]
Conceptual diagram of basic structure of the present invention. Curve conceptual diagram of
volume velocity measured by a volume velocity estimation observer and a laser displacement
gauge of a system according to the present invention. Curve conceptual diagram of sound
pressure measurement of the present invention
Explanation of sign
[0016]
11 feed forward control device 111 digital signal processing device 12 feedback control device
121 analog circuit 2 volume velocity estimation observer 3 loudspeaker 31 amplifier 32 speaker
41 first curve 42 second curve 51 first sound pressure curve 52 second Sound pressure curve 53
third sound pressure curve 54 fourth sound pressure curve
08-05-2019
6
1/--страниц
Пожаловаться на содержимое документа