CN113689852A - Vehicle-mounted voice control method and system based on sound source positioning - Google Patents
Vehicle-mounted voice control method and system based on sound source positioning Download PDFInfo
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- CN113689852A CN113689852A CN202110906659.3A CN202110906659A CN113689852A CN 113689852 A CN113689852 A CN 113689852A CN 202110906659 A CN202110906659 A CN 202110906659A CN 113689852 A CN113689852 A CN 113689852A
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- 230000004807 localization Effects 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 claims description 3
- 230000005236 sound signal Effects 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 abstract description 5
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/22—Procedures used during a speech recognition process, e.g. man-machine dialogue
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/22—Procedures used during a speech recognition process, e.g. man-machine dialogue
- G10L2015/223—Execution procedure of a spoken command
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
Abstract
The invention provides a vehicle-mounted voice control method and system based on sound source positioning, aiming at the competitiveness of voice commands of drivers and passengers in a vehicle, the position of a voice source in the vehicle is judged by a time difference method, and whether the voice source is executed or not is selected according to setting, so that the driving safety performance is ensured, meanwhile, the man-machine interaction function and scene are enriched, the function of controlling a designated vehicle by a designated person is realized, and the use safety of the vehicle is improved. The voice command user who includes the main driver, the auxiliary driver and the back row passengers is customized, so that the voice command user has various choices and is flexible to use. The method has simple calculation and does not need complex calculation, thereby improving the response sensitivity. The invention can realize free switching of functions, enrich the functions of the vehicle-mounted terminal and improve the high-grade feeling. The invention has simple structure and low cost.
Description
Technical Field
The invention belongs to the technical field of sound source positioning, and particularly relates to a vehicle-mounted voice control method and system based on sound source positioning.
Background
With the increasingly hot and high call sound of concepts of automatic driving and intelligent cabins, the requirements on vehicle-mounted equipment are increasingly high, and the functions need to be realized and refined. At present, vehicle-mounted IVI on the market can realize basic voice interaction function, which brings convenience to drivers and passengers to a certain extent, but the current product cannot judge the source of voice, namely no matter who, as long as a voice command is sent, the system can automatically execute related functions, the functions are relatively single, and certain voice commands related to driving safety are sent by designated personnel to be safer. Therefore, the voice control system based on sound source positioning is provided, the system does not need complex calculation, can quickly position a voice source, realizes safer operation and enriches the functions of the vehicle machine.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the vehicle-mounted voice control method and system based on sound source positioning are used for realizing the function of controlling a specified vehicle by a specified person.
The technical scheme adopted by the invention for solving the technical problems is as follows: a vehicle-mounted voice control method based on sound source positioning comprises the following steps:
s1: the method comprises the steps of constructing a vehicle-mounted voice control system based on sound source positioning, wherein the vehicle-mounted voice control system comprises a left front microphone, a right front microphone, a rear microphone and a voice control unit; the left front microphone and the right front microphone are symmetrically arranged in the left and right directions relative to the longitudinal axis of the automobile; the right front microphone and the rear microphone are symmetrically arranged in front and back of a cross shaft of the automobile; the signal input end of the voice control unit is respectively connected with the signal output ends of the left front microphone, the right front microphone and the rear microphone;
s2: the driver and the crew send out voice control instructions in the form of sound waves, and the sound waves are transmitted to the left front microphone, the right front microphone and the rear microphone respectively;
s3: the left front microphone, the right front microphone and the rear microphone respectively convert the received sound signals into electric signals and transmit the electric signals to the voice control unit;
s4: the voice control unit analyzes the electric signal into a voice control instruction and stamps a time stamp to be used as a sequence mark;
s5: the voice control unit judges the position of a sound source of the voice control instruction through region estimation according to the sequence of the received voice control instruction; under the condition that the sound source does not move, the distance between the sound source and any two microphones is constant; the sound source is simultaneously positioned on a left hyperbola and a right hyperbola which take the left front microphone and the right front microphone as focuses and an upper hyperbola and a lower hyperbola which take the right front microphone and the rear microphone as focuses; judging whether the sound source is positioned on a left half curve or a right half curve of the left hyperbola or the right hyperbola according to the distance difference between the sound source and the left front microphone and the right front microphone; judging the upper half part curve or the lower half part curve of the upper and lower hyperbolas of the sound source according to the distance difference from the sound source to the front right microphone and the rear microphone; the coordinates of the intersection points of the left and right hyperbolas and the upper and lower hyperbolas are the coordinates of the sound source.
According to the scheme, in the step S2, the specific steps are as follows:
respectively setting B, A, D, F at the points of the sound source, the left front microphone, the right front microphone and the rear microphone, and respectively setting BA, BD and BF as sound wave transmission routes; and C and E are respectively the distance equivalent points of A and D on the lines BD and BF, then:
LBA＝LBC (1)，
LBD＝LBE (2)，
assuming that the propagation speed of sound in air is v, the time for sound wave to pass from B to A is:
TBA＝LBA/v (3)，
the time for the sound wave to travel from B to D is:
TBD＝LBD/v (4)，
the time for the sound wave to travel from B to F is:
TBF＝LBF/v (5)。
further, in step S5, the specific steps include:
s51: if TBD＞TBAThen L isBD＞LBAThe left front microphone receives signals before the right front microphone, and the sound source is positioned on the left half part curve of a hyperbola taking the left front microphone and the right front microphone as focuses;
if TBD＜TBAThen L isBD＜LBAThe right front microphone receives signals before the left front microphone, and the sound source is located at the left front microphoneThe right half curve of the hyperbola with the right front microphone as the focus;
s52: if TBF＞TBDThen L isBF＞LBDThe right front microphone receives signals before the rear microphone, and a sound source is positioned on the upper half curve of a hyperbola taking the right front microphone and the rear microphone as focuses;
if TBF＜TBDThen L isBF＜LBDThe rear microphone receives signals before the right front microphone, and the sound source is positioned on the lower half part curve of a hyperbola taking the right front microphone and the rear microphone as focuses;
s53: the sound source is positioned on the left half curve of the hyperbola taking the left front microphone and the right front microphone as focuses, and when the sound source is positioned on the upper half curve of the hyperbola taking the right front microphone and the rear microphone as focuses, the sound source is a main driver seat person;
when the sound source is positioned on the right half curve of the hyperbola taking the left front microphone and the right front microphone as focuses and is positioned on the upper half curve of the hyperbola taking the right front microphone and the rear microphone as focuses, the sound source is a passenger seat person;
the sound source is positioned on the left half curve of the hyperbola taking the left front microphone and the right front microphone as focuses, and when the sound source is positioned on the lower half curve of the hyperbola taking the right front microphone and the rear microphone as focuses, the sound source is a back left seat person;
when the sound source is located on the right half curve of the hyperbola with the left front microphone and the right front microphone as the focal points, and is located on the lower half curve of the hyperbola with the right front microphone and the rear microphone as the focal points, the sound source is a right and rear seat person.
According to the scheme, in the step S3, the specific steps are as follows: the signal transmission adopts FIFO first-in first-out mode.
According to the scheme, the method further comprises the following steps:
s6: the voice control unit ignores the voice control instructions issued by other positions and determines whether to execute the received voice control instruction or not by setting the authority of the voice control instruction at the specific position for executing the vehicle function.
A vehicle-mounted voice control system based on sound source positioning comprises a left front microphone, a right front microphone, a rear microphone and a voice control unit; the left front microphone and the right front microphone are symmetrically arranged in the left and right directions relative to the longitudinal axis of the automobile; the right front microphone and the rear microphone are symmetrically arranged in front and back of a cross shaft of the automobile; the signal input end of the voice control unit is respectively connected with the signal output ends of the left front microphone, the right front microphone and the rear microphone.
A computer storage medium having stored therein a computer program executable by a computer processor, the computer program executing a sound source localization-based in-vehicle voice control method.
The invention has the beneficial effects that:
1. according to the vehicle-mounted voice control method and system based on sound source positioning, aiming at the competitiveness of voice commands of drivers and passengers in a vehicle, the position of a voice source in the vehicle is judged through a time difference method, whether the voice source is executed or not is selected according to setting, the driving safety performance is guaranteed, meanwhile, the man-machine interaction function and scenes are enriched, the function that the appointed persons control the appointed vehicle is achieved, and the use safety of the vehicle is improved.
2. The voice command user who includes the main driver, the auxiliary driver and the back row passengers is customized, so that the voice command user has various choices and is flexible to use.
3. The method has simple calculation and does not need complex calculation, thereby improving the response sensitivity.
4. The invention can realize free switching of functions, enrich the functions of the vehicle-mounted terminal and improve the high-grade feeling.
5. The invention has simple structure and low cost.
Drawings
Fig. 1 is a view showing a microphone mounting position according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of area location according to an embodiment of the present invention.
Fig. 3 is a flow chart of area location according to an embodiment of the present invention.
In the figure: 1. a left front microphone; 2. a front right microphone; 3. a rear microphone; 4. a sound source.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 3, an embodiment of the present invention includes a left front microphone 1, a right front microphone 2, a rear microphone 3, a voice control unit, and the like. The left front microphone 1 and the right front microphone 2 are installed in bilateral symmetry about the longitudinal axis of the automobile, and the right front microphone 2 and the rear microphone 3 are installed in front-rear symmetry about the transverse axis of the automobile.
The working principle of the invention is illustrated as follows:
referring to fig. 1, the front left microphone 1, the front right microphone 2 and the rear microphone 3 are fixedly installed, that is, the coordinate position is known, and the sound source 4 is unknown. Although the sound source position is unknown, when the sound source 4 is not moved, the distance difference between the sound source 4 and the front left microphone 1 and the front right microphone 2 is constant, and it can be known from geometrical knowledge that the sound source 4 must be on a hyperbolic curve with the front left microphone 1 and the front right microphone 2 as the focal point, and similarly, the sound source 4 must also be on a hyperbolic curve with the front right microphone 2 and the rear right microphone 3 as the focal point, and the intersection point of the two hyperbolic curves is the coordinate of the sound source 4.
Referring to fig. 2, it is assumed that the sound source 4 is positioned in the driving position. When a driver sends a voice command, sound waves are transmitted to the left front microphone 1, the right front microphone 2 and the rear microphone 3, the transmission routes are BA, BD and BF respectively, C and E in the figure are distance equivalent points of A and D on the lines BD and BF, and the following formula can be obtained:
LBA＝L BC ①
LBD＝L BE ②
the time for the sound wave to pass from B to A is TBA＝LBA/v ③
The time for the sound wave to pass from B to D is TBD＝LBD/v ④
The time for the sound wave to pass from B to F is TBF＝LBF/v ⑤
Where v represents the speed of sound propagation in air.
When L isBD>LBAWhen, TBD>TBAThe front left microphone 1 receives the signal before the front right microphone 2, i.e. the sound source 4 should be located so as to1 and 2 are on the left curve of the hyperbola with focus, when LBF>LBDWhen, TBF>TBDThe right front microphone 2 receives signals before the rear microphone 3, and the sound source 4 should be located on the upper half curve of a hyperbola that focuses on the right front microphone 2 and the rear microphone 3, so that it can be concluded that the sound source 4 should be located in the front left area, in line with the figure. Other locations may be correctly located in this way.
When the voice control instruction is issued, the left front microphone 1, the right front microphone 2 and the rear microphone 3 convert the sound signal into an electric signal and transmit the electric signal to the voice control unit, and the signal transmission adopts a FIFO (first in first out) mode. The voice control unit analyzes the electric signal into a corresponding command and simultaneously stamps a time stamp on the command as a sequence mark. The voice control unit judges whether the position of the sound source 4 of the voice control instruction is a main driver seat, a secondary driver seat, a rear left side or a rear right side through region estimation according to the sequence of the received commands of the three microphones, and determines whether to execute the voice control instruction according to the current setting. And the driving safety can be improved by setting a control command which can only be sent by a driver if lane keeping is started and ignoring similar instructions sent by other positions.
The area location algorithm is as follows:
the above embodiments are only used for illustrating the design idea and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and implement the present invention accordingly, and the protection scope of the present invention is not limited to the above embodiments. Therefore, all equivalent changes and modifications made in accordance with the principles and concepts disclosed herein are intended to be included within the scope of the present invention.
Claims (7)
1. A vehicle-mounted voice control method based on sound source positioning is characterized in that: the method comprises the following steps:
s1: the method comprises the steps of constructing a vehicle-mounted voice control system based on sound source positioning, wherein the vehicle-mounted voice control system comprises a left front microphone, a right front microphone, a rear microphone and a voice control unit; the left front microphone and the right front microphone are symmetrically arranged in the left and right directions relative to the longitudinal axis of the automobile; the right front microphone and the rear microphone are symmetrically arranged in front and back of a cross shaft of the automobile; the signal input end of the voice control unit is respectively connected with the signal output ends of the left front microphone, the right front microphone and the rear microphone;
s2: the driver and the crew send out voice control instructions in the form of sound waves, and the sound waves are transmitted to the left front microphone, the right front microphone and the rear microphone respectively;
s3: the left front microphone, the right front microphone and the rear microphone respectively convert the received sound signals into electric signals and transmit the electric signals to the voice control unit;
s4: the voice control unit analyzes the electric signal into a voice control instruction and stamps a time stamp to be used as a sequence mark;
s5: the voice control unit judges the position of a sound source of the voice control instruction through region estimation according to the sequence of the received voice control instruction; under the condition that the sound source does not move, the distance between the sound source and any two microphones is constant; the sound source is simultaneously positioned on a left hyperbola and a right hyperbola which take the left front microphone and the right front microphone as focuses and an upper hyperbola and a lower hyperbola which take the right front microphone and the rear microphone as focuses; judging whether the sound source is positioned on a left half curve or a right half curve of the left hyperbola or the right hyperbola according to the distance difference between the sound source and the left front microphone and the right front microphone; judging the upper half part curve or the lower half part curve of the upper and lower hyperbolas of the sound source according to the distance difference from the sound source to the front right microphone and the rear microphone; the coordinates of the intersection points of the left and right hyperbolas and the upper and lower hyperbolas are the coordinates of the sound source.
2. The vehicle-mounted voice control method based on sound source localization as claimed in claim 1, wherein: in the step S2, the specific steps are as follows:
respectively setting B, A, D, F at the points of the sound source, the left front microphone, the right front microphone and the rear microphone, and respectively setting BA, BD and BF as sound wave transmission routes; and C and E are respectively the distance equivalent points of A and D on the lines BD and BF, then:
LBA＝LBC (1)，
LBD＝LBE (2)，
assuming that the propagation speed of sound in air is v, the time for sound wave to pass from B to A is:
TBA＝LBA/v (3),
the time for the sound wave to travel from B to D is:
TBD＝LBD/v (4),
the time for the sound wave to travel from B to F is:
TBF＝LBF/v (5)。
3. the vehicle-mounted voice control method based on sound source localization as claimed in claim 2, characterized in that: in the step S5, the specific steps are as follows:
s51: if TBD＞TBAThen L isBD＞LBAThe left front microphone receives signals before the right front microphone, and the sound source is positioned on the left half part curve of a hyperbola taking the left front microphone and the right front microphone as focuses;
if TBD＜TBAThen L isBD＜LBAThe right front microphone receives signals before the left front microphone, and the sound source is positioned on the right half curve of a hyperbola taking the left front microphone and the right front microphone as focuses;
s52: if TBF＞TBDThen L isBF＞LBDThe right front microphone receives signals before the rear microphone, and a sound source is positioned on the upper half curve of a hyperbola taking the right front microphone and the rear microphone as focuses;
if TBF＜TBDThen L isBF＜LBDThe rear microphone receives signals before the right front microphone, and the sound source is positioned on the lower half part curve of a hyperbola taking the right front microphone and the rear microphone as focuses;
s53: the sound source is positioned on the left half curve of the hyperbola taking the left front microphone and the right front microphone as focuses, and when the sound source is positioned on the upper half curve of the hyperbola taking the right front microphone and the rear microphone as focuses, the sound source is a main driver seat person;
when the sound source is positioned on the right half curve of the hyperbola taking the left front microphone and the right front microphone as focuses and is positioned on the upper half curve of the hyperbola taking the right front microphone and the rear microphone as focuses, the sound source is a passenger seat person;
the sound source is positioned on the left half curve of the hyperbola taking the left front microphone and the right front microphone as focuses, and when the sound source is positioned on the lower half curve of the hyperbola taking the right front microphone and the rear microphone as focuses, the sound source is a back left seat person;
when the sound source is located on the right half curve of the hyperbola with the left front microphone and the right front microphone as the focal points, and is located on the lower half curve of the hyperbola with the right front microphone and the rear microphone as the focal points, the sound source is a right and rear seat person.
4. The vehicle-mounted voice control method based on sound source localization as claimed in claim 1, wherein: in the step S3, the specific steps are as follows: the signal transmission adopts FIFO first-in first-out mode.
5. The vehicle-mounted voice control method based on sound source localization as claimed in claim 1, wherein: further comprising the steps of:
s6: the voice control unit ignores the voice control instructions issued by other positions and determines whether to execute the received voice control instruction or not by setting the authority of the voice control instruction at the specific position for executing the vehicle function.
6. A vehicle-mounted voice control system for the sound source localization-based vehicle-mounted voice control method according to any one of claims 1 to 5, characterized in that: the microphone comprises a left front microphone, a right front microphone, a rear microphone and a voice control unit; the left front microphone and the right front microphone are symmetrically arranged in the left and right directions relative to the longitudinal axis of the automobile; the right front microphone and the rear microphone are symmetrically arranged in front and back of a cross shaft of the automobile; the signal input end of the voice control unit is respectively connected with the signal output ends of the left front microphone, the right front microphone and the rear microphone.
7. A computer storage medium, characterized in that: stored therein is a computer program executable by a computer processor, the computer program performing a sound source localization-based vehicular voice control method according to any one of claims 1 to 5.
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