CN104469623B - Sound field adjusting system and method based on car pillow - Google Patents
Sound field adjusting system and method based on car pillow Download PDFInfo
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- CN104469623B CN104469623B CN201410701003.8A CN201410701003A CN104469623B CN 104469623 B CN104469623 B CN 104469623B CN 201410701003 A CN201410701003 A CN 201410701003A CN 104469623 B CN104469623 B CN 104469623B
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Abstract
The invention provides a sound field adjusting system and method based on a car pillow. The system comprises a pillow detection and positioning module and a sound field adjusting control module; the pillow detection and positioning module is used for conducting infrared sensing detection on the car pillow within an appropriate distance; when radiation heat is detected, passenger distribution information in a car body is determined according to radiation heat signals, and the sound field center position is determined according to the passenger distribution information. The sound field adjusting control module is used for enabling a car navigation multimedia terminal to control and adjust delayed proportion information of various voice frequency channels of a voice frequency DSP, convert the delayed proportion information through a DAC and transmit the delayed proportion information to the voice frequency channels according to the sound field center position, and the voice frequency channels make sounds through a power amplifier control loudspeaker according to delayed proportion simulation voice frequency signals. By means of the sound field adjusting system and method, a sound field center in the car navigation multimedia terminal is determined by real-time passenger distribution in the car body, tedious operation and errors of manual adjustment of a user are avoided, and great convenience is brought to the user.
Description
Technical field
The present invention relates to sound field Calibration Technology field, a kind of system and method based on automotive headrest regulation sound field.
Background technology
Along with the progress of sound system, current sound system, by the single sound channel of earliest period, develops into the cincture audio playing out stereosonic double track, even multichannel, and the cincture audio of multichannel brings splendid audio experience to user.Adjustment sound field center is then needed so that sound field center concentrates on the place that human ear audition is concentrated most in order to realize optimal audio.At present, vehicle navigation multimedia system, it is only capable of under multiple audio patterns of default setting switching, can not automatically detect the real-time change of sound field center, so that it is determined that the time delay ratio of each voice-grade channel, to realize optimal auditory effect.
Therefore prior art awaits further improving.
Summary of the invention
In view of above-mentioned weak point of the prior art, it is an object of the invention to provide the user a kind of system and method based on automotive headrest regulation sound field, aim to solve the problem that the real-time change that can not automatically detect sound field center in prior art, so that it is determined that the time delay ratio of each voice-grade channel, with the problem realizing optimal auditory effect.
It is as follows that the present invention solves the technical scheme that technical problem used:
A kind of system based on automotive headrest regulation sound field, wherein, including:
Headrest detection and locating module, for carrying out infrared sensing detection in automotive headrest one distance to a declared goal, when radiations heat energy having been detected, then determine the Passenger's distribution information in vehicle body according to radiations heat energy signal, and determine sound field center according to described Passenger's distribution information；
Sound field regulation control module, for vehicle navigation multimedia terminal according to described sound field center, controlling to adjust the time delay percent information of each voice-grade channel of audio frequency DSP and send to each voice-grade channel through DAC conversion, each voice-grade channel controls speaker sounding according to the simulated audio signal of described time delay ratio through power amplifier.
Described system based on automotive headrest regulation sound field, wherein, described headrest detection and locating module specifically include:
Headrest infrared sensing detector unit, for carrying out infrared sensing detection in automotive headrest one distance to a declared goal, when radiations heat energy having been detected, sends radiations heat energy to position distribution detector unit and changes signal；
Position distribution detector unit, the radiations heat energy sent for receiving described headrest infrared sensing detector unit changes signal, and the Passenger's distribution information in signal determines vehicle body is changed according to described radiations heat energy, determine sound field center further according to described Passenger's distribution information.
Described system based on automotive headrest regulation sound field, wherein, described sound field regulation control module specifically includes:
Time delay ratio obtains control unit, for vehicle navigation multimedia terminal according to described sound field center, regulates the time delay percent information of each voice-grade channel, and is sent to audio frequency DSP unit by USART or I2C agreement by described time delay percent information；
Audio frequency DSP unit, obtains, for receiving described time delay ratio, the described time delay percent information that control unit sends, regulates the time delay ratio of each voice-grade channel according to time delay percent information, send corresponding time delay simulated audio signal to each voice-grade channel after DAC changes；
Power amplifier and speaker unit, send corresponding time delay simulated audio signal for receiving audio frequency DSP unit to each voice-grade channel, and speaker sounding is arrived in output after being amplified by power amplifier by described time delay simulated audio signal.
Described system based on automotive headrest regulation sound field, wherein, described distance to a declared goal is 5-15cm.
Described system based on automotive headrest regulation sound field, wherein, the number of described headrest infrared sensing detector unit is identical with automotive seat number.
A kind of method based on automotive headrest regulation sound field, wherein, described method includes step:
A, carry out infrared sensing detection in automotive headrest one distance to a declared goal, when radiations heat energy having been detected, then determine the Passenger's distribution information in vehicle body according to radiations heat energy signal, and determine sound field center according to described Passenger's distribution information；
B, vehicle navigation multimedia terminal are according to described sound field center, controlling to adjust the time delay percent information of each voice-grade channel of audio frequency DSP and send to each voice-grade channel through DAC conversion, each voice-grade channel controls speaker sounding according to the simulated audio signal of described time delay ratio through power amplifier.
Described method based on automotive headrest regulation sound field, wherein, described step A specifically includes:
A1, headrest infrared sensing detector unit carry out infrared sensing detection in automotive headrest one distance to a declared goal, when radiations heat energy having been detected, send radiations heat energy to position distribution detector unit and change signal；
A2, described position distribution detector unit receive the radiations heat energy change signal that described headrest infrared sensing detector unit sends, and the Passenger's distribution information in signal determines vehicle body is changed according to described radiations heat energy, determine sound field center further according to described Passenger's distribution information.
Described method based on automotive headrest regulation sound field, wherein, described step B specifically includes:
B1, vehicle navigation multimedia terminal, according to described sound field center, are regulated the time delay percent information of each voice-grade channel, and are sent to audio frequency DSP unit by USART or I2C agreement by described time delay percent information；
B2, audio frequency DSP unit receive described time delay ratio and obtain the described time delay percent information that control unit sends, and regulate the time delay ratio of each voice-grade channel according to time delay percent information, send corresponding time delay simulated audio signal to each voice-grade channel after DAC changes；
B3, power amplifier and speaker unit receive audio frequency DSP unit and send corresponding time delay simulated audio signal to each voice-grade channel, and speaker sounding is arrived in output after being amplified by power amplifier by described time delay simulated audio signal.
Described method based on automotive headrest regulation sound field, wherein, described distance to a declared goal is 5-15cm.
Described method based on automotive headrest regulation sound field, wherein, the number of described headrest infrared sensing detector unit is identical with automotive seat number.
A kind of system and method based on automotive headrest regulation sound field provided by the present invention, system includes: headrest detection and locating module, for carrying out infrared sensing detection in automotive headrest one distance to a declared goal, when radiations heat energy having been detected, then determine the Passenger's distribution information in vehicle body according to radiations heat energy signal, and determine sound field center according to described Passenger's distribution information；Sound field regulation control module, for vehicle navigation multimedia terminal according to described sound field center, controlling to adjust the time delay percent information of each voice-grade channel of audio frequency DSP and send to each voice-grade channel through DAC conversion, each voice-grade channel controls speaker sounding according to the simulated audio signal of described time delay ratio through power amplifier.The sound field center that present invention achieves in vehicle navigation multimedia terminal determines by the real-time Passenger's distribution in vehicle body, it is to avoid troublesome operation that user manually regulates and error, greatly facilitates user.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of system preferred embodiment based on automotive headrest regulation sound field of the present invention.
Fig. 2 is headrest detection and the concrete structure block diagram of locating module in system based on automotive headrest regulation sound field of the present invention.
Fig. 3 is the concrete structure block diagram of system middle pitch field control control module based on automotive headrest regulation sound field of the present invention.
Fig. 4 is the flow chart of method preferred embodiment based on automotive headrest regulation sound field of the present invention.
Fig. 5 is the particular flow sheet of step S100 in method based on automotive headrest regulation sound field of the present invention.
Fig. 6 is the particular flow sheet of step S200 in method based on automotive headrest regulation sound field of the present invention.
Detailed description of the invention
For making the purpose of the present invention, technical scheme and advantage clearer, clear and definite, the present invention is described in more detail for the embodiment that develops simultaneously referring to the drawings.Should be appreciated that specific embodiment described herein is used only for explaining the present invention, be not intended to limit the present invention.
Refer to the structured flowchart that Fig. 1, Fig. 1 are system preferred embodiment based on automotive headrest regulation sound field of the present invention.As it is shown in figure 1, described system based on automotive headrest regulation sound field, including:
Headrest detection and locating module 100, for carrying out infrared sensing detection in automotive headrest one distance to a declared goal, when radiations heat energy having been detected, then determine the Passenger's distribution information in vehicle body according to radiations heat energy signal, and determine sound field center according to described Passenger's distribution information
In prior art, owing to being affected by frequency response curve skewness and audio amplifier directivity, the sound field that sound equipment is broadcasted the most more or less with former recording time situation be discrepant.Sound field technology is exactly to allow be presented in face of listener or try one's best around the three-dimensional spatial impression of surrounding with when recording consistent technology, is to recording site, reproduction system and coding, the specification of decoding.Sound field center is then topmost regulation parameter in sound field adjustment, and one is regulated to appropriate location and can bring optimal audio experience to user.
In presently preferred embodiments of the present invention, described headrest detection and locating module 100 are exactly according to being arranged on each seat whether radiations heat energy in the infrared sensor rested the head on detects seat distance to a declared goal changes, then understand the passenger that sat down on this seat when changing, wherein said distance to a declared goal is set to 5-15cm.Until when the Passenger's distribution information detected in vehicle body, then determining sound field center according to Passenger's distribution information.
Sound field regulation control module 200, for vehicle navigation multimedia terminal according to described sound field center, controlling to adjust the time delay percent information of each voice-grade channel of audio frequency DSP and send to each voice-grade channel through DAC conversion, each voice-grade channel controls speaker sounding according to the simulated audio signal of described time delay ratio through power amplifier.
Obviously, after sound field centralized positioning module 100 determines sound field center, the time delay ratio of each voice-grade channel in vehicle navigation multimedia terminal need to be regulated, to guarantee that position is being specified in the sound field center of vehicle navigation multimedia terminal by sound field regulation control module 200.
Further, as in figure 2 it is shown, described headrest detection and locating module 100 specifically include:
Headrest infrared sensing detector unit 101, for carrying out infrared sensing detection in automotive headrest one distance to a declared goal, when radiations heat energy having been detected, sends radiations heat energy to position distribution detector unit and changes signal.
Concrete, at each chair headrest that described headrest infrared sensing detector unit 101 is arranged in body of a motor car, namely the number of described headrest infrared sensing detector unit 101 is identical with automotive seat number.
Position distribution detector unit 102, the radiations heat energy sent for receiving described headrest infrared sensing detector unit 101 changes signal, and the Passenger's distribution information in signal determines vehicle body is changed according to described radiations heat energy, determine sound field center further according to described Passenger's distribution information.
Wherein, the location distribution information of seated passenger during described Passenger's distribution information is the multiple seats in determining vehicle body.Such as, a double car of four, before the seat that keeps left be operator seat, before seat of keeping right be co-driver, after two seats be then passenger position；More specifically, the plane of seat distribution a direct coordinate system of plane can be set up in car, as with headstock left end point as zero, with vehicle body direction backwards as Y-axis, with the vehicle body direction being perpendicular to backwards and set up XOY rectangular coordinate system towards the direction of car left end for X-axis；And setting operator seat coordinate as (1,1), co-driver coordinate is (2,1), and the back seat seat coordinate that keeps left keeps right seat coordinate for (2,2) for (2,1) and back seat；When the pressure only detecting operator seat changes, then Passenger's distribution information is Passenger's distribution in (1,1) point, can determine that sound field center is for (1,1) according to this Passenger's distribution information；When pressure main driving position and co-driver being detected all changes, then Passenger's distribution information is Passenger's distribution in (1,1) and (2,1) point, can determine that sound field center is for (1.5,1) according to this Passenger's distribution information.Visible, change in real time according to the radiations heat energy in infrared sensor detection distance to a declared goal and determine Passenger's distribution information, sound field center is determined further according to Passenger's distribution information, achieve the detection automatically of sound field center and automatically switch, each channel parameters of stereo set is manually regulated without user, avoid loaded down with trivial details user operation and error that inaccurate regulation brings, greatly aspect user.
Further, as it is shown on figure 3, described sound field regulation control module 200 specifically includes:
Time delay ratio obtains control unit 201, for vehicle navigation multimedia terminal according to described sound field center, regulates the time delay percent information of each voice-grade channel, and is sent to audio frequency DSP unit 202 by USART or I2C agreement by described time delay percent information；
Audio frequency DSP unit 202, the described time delay percent information that control unit 201 sends is obtained for receiving described time delay ratio, regulate the time delay ratio of each voice-grade channel according to time delay percent information, after DAC changes, send corresponding time delay simulated audio signal to each voice-grade channel；
Power amplifier and speaker unit 203, send corresponding time delay simulated audio signal for receiving audio frequency DSP unit 202 to each voice-grade channel, and speaker sounding is arrived in output after being amplified by power amplifier by described time delay simulated audio signal.
nullIn presently preferred embodiments of the present invention，After vehicle navigation multimedia terminal receives sound field center，Automatically will preserve each position center sound field time delay scale base and automatically set the time delay ratio of each voice-grade channel in being pre-configured with，By time delay ratio, each voice-grade channel time delay ratio is obtained control unit 201 send to audio frequency DSP unit 202，Each voice-grade channel time delay ratio is adjusted according to system processor instruction by audio frequency DSP unit 202，After export the time delay simulated audio signal of respective channel again，Give the amplification output of rear class power amplifier and send sound to loudspeaker，Sound wave amplitude-frequency signal ADC conversion sampling will be received again by position audio receiver (being arranged at automotive headrest)，Correct by delivering to DSP unit with default center sound field benchmark comparison operation、Obtain the mutual data communication of control unit with time delay ratio verify or adjust，To reach currently to be automatically adjusted the accuracy of sound field.
Based on said system, present invention also offers a kind of method based on automotive headrest regulation sound field.As shown in Figure 4, described method based on automotive headrest regulation sound field, including:
Step S100, carry out infrared sensing detection in automotive headrest one distance to a declared goal, when radiations heat energy having been detected, then determine the Passenger's distribution information in vehicle body according to radiations heat energy signal, and determine sound field center according to described Passenger's distribution information；As detailed above.
Step S200, vehicle navigation multimedia terminal are according to described sound field center, controlling to adjust the time delay percent information of each voice-grade channel of audio frequency DSP and send to each voice-grade channel through DAC conversion, each voice-grade channel controls speaker sounding according to the simulated audio signal of described time delay ratio through power amplifier；As detailed above.
Further, as it is shown in figure 5, in described method based on automotive headrest regulation sound field, described step S100 specifically includes:
Step S101, headrest infrared sensing detector unit carry out infrared sensing detection in automotive headrest one distance to a declared goal, when radiations heat energy having been detected, send radiations heat energy to position distribution detector unit and change signal；As detailed above.
Step S102, described position distribution detector unit receive the radiations heat energy change signal that described headrest infrared sensing detector unit sends, and the Passenger's distribution information in signal determines vehicle body is changed according to described radiations heat energy, determine sound field center further according to described Passenger's distribution information；As detailed above.
Further, as shown in Figure 6, in described method based on automotive headrest regulation sound field, described step S200 specifically includes:
Step S201, vehicle navigation multimedia terminal, according to described sound field center, are regulated the time delay percent information of each voice-grade channel, and are sent to audio frequency DSP unit by USART or I2C agreement by described time delay percent information；As detailed above.
Step S202, audio frequency DSP unit receive described time delay ratio and obtain the described time delay percent information that control unit sends, regulate the time delay ratio of each voice-grade channel according to time delay percent information, after DAC changes, send corresponding time delay simulated audio signal to each voice-grade channel；As detailed above.
Step S203, power amplifier and speaker unit receive audio frequency DSP unit and send corresponding time delay simulated audio signal to each voice-grade channel, and speaker sounding is arrived in output after being amplified by power amplifier by described time delay simulated audio signal；As detailed above.
Further, in described method based on automotive headrest regulation sound field, described distance to a declared goal is 5-15cm；As detailed above.
Further, in described method based on automotive headrest regulation sound field, the number of described headrest infrared sensing detector unit is identical with automotive seat number；As detailed above.
In sum, a kind of system and method based on automotive headrest regulation sound field provided by the present invention, system includes: headrest detection and locating module, for carrying out infrared sensing detection in automotive headrest one distance to a declared goal, when radiations heat energy having been detected, then determine the Passenger's distribution information in vehicle body according to radiations heat energy signal, and determine sound field center according to described Passenger's distribution information；Sound field regulation control module, for vehicle navigation multimedia terminal according to described sound field center, controlling to adjust the time delay percent information of each voice-grade channel of audio frequency DSP and send to each voice-grade channel through DAC conversion, each voice-grade channel controls speaker sounding according to the simulated audio signal of described time delay ratio through power amplifier.The sound field center that present invention achieves in vehicle navigation multimedia terminal determines by the real-time Passenger's distribution in vehicle body, it is to avoid troublesome operation that user manually regulates and error, greatly facilitates user.
It is understood that for those of ordinary skills, can be according to technical scheme and inventive concept thereof in addition equivalent or change, and all these change or replace the protection domain that all should belong to appended claims of the invention.
Claims (8)
1. a system based on automotive headrest regulation sound field, it is characterised in that including:
Headrest detection and locating module, for carrying out infrared sensing detection in automotive headrest one distance to a declared goal, when radiations heat energy having been detected, then determine the Passenger's distribution information in vehicle body according to radiations heat energy signal, and determine sound field center according to described Passenger's distribution information；
Sound field regulation control module, for vehicle navigation multimedia terminal according to described sound field center, controlling to adjust the time delay percent information of each voice-grade channel of audio frequency DSP unit and send to each voice-grade channel through DAC conversion, each voice-grade channel controls speaker sounding according to the simulated audio signal of described time delay ratio through power amplifier；
Described headrest detection and locating module specifically include:
Headrest infrared sensing detector unit, for carrying out infrared sensing detection in automotive headrest one distance to a declared goal, when radiations heat energy having been detected, sends radiations heat energy to position distribution detector unit and changes signal；
Position distribution detector unit, the radiations heat energy sent for receiving described headrest infrared sensing detector unit changes signal, and the Passenger's distribution information in signal determines vehicle body is changed according to described radiations heat energy, determine sound field center further according to described Passenger's distribution information；
Described sound field regulation control module specifically includes:
Time delay ratio obtains control unit, for vehicle navigation multimedia terminal according to described sound field center, regulates the time delay percent information of each voice-grade channel, and is sent to audio frequency DSP unit by USART or I2C agreement by described time delay percent information；
Audio frequency DSP unit, obtains, for receiving described time delay ratio, the described time delay percent information that control unit sends, regulates the time delay ratio of each voice-grade channel according to time delay percent information, send corresponding time delay simulated audio signal to each voice-grade channel after DAC changes；
Position audio receiver is set at automotive headrest, by amplitude-frequency signal ADC conversion sampling in the sound wave that position audio receiver will receive, correct by delivering to audio frequency DSP unit with default center sound field benchmark comparison operation and carry out data communication to verify or to adjust sound field center with time delay ratio acquisition control unit.
System based on automotive headrest regulation sound field the most according to claim 1, it is characterised in that described sound field regulation control module specifically includes:
Power amplifier and speaker unit, send corresponding time delay simulated audio signal for receiving audio frequency DSP unit to each voice-grade channel, and speaker sounding is arrived in output after being amplified by power amplifier by described time delay simulated audio signal.
System based on automotive headrest regulation sound field the most according to claim 1, it is characterised in that described distance to a declared goal is 5-15cm.
System based on automotive headrest regulation sound field the most according to claim 1, it is characterised in that the number of described headrest infrared sensing detector unit is identical with automotive seat number.
5. a method based on automotive headrest regulation sound field, it is characterised in that described method includes step:
A, carry out infrared sensing detection in automotive headrest one distance to a declared goal, when radiations heat energy having been detected, then determine the Passenger's distribution information in vehicle body according to radiations heat energy signal, and determine sound field center according to described Passenger's distribution information；
B, vehicle navigation multimedia terminal are according to described sound field center, controlling to adjust the time delay percent information of each voice-grade channel of audio frequency DSP unit and send to each voice-grade channel through DAC conversion, each voice-grade channel controls speaker sounding according to the simulated audio signal of described time delay ratio through power amplifier；
Described step A specifically includes:
A1, headrest infrared sensing detector unit carry out infrared sensing detection in automotive headrest one distance to a declared goal, when radiations heat energy having been detected, send radiations heat energy to position distribution detector unit and change signal；
A2, described position distribution detector unit receive the radiations heat energy change signal that described headrest infrared sensing detector unit sends, and the Passenger's distribution information in signal determines vehicle body is changed according to described radiations heat energy, determine sound field center further according to described Passenger's distribution information；
Described step B specifically includes:
B1, vehicle navigation multimedia terminal, according to described sound field center, are regulated the time delay percent information of each voice-grade channel, and are sent to audio frequency DSP unit by USART or I2C agreement by described time delay percent information；
B2, audio frequency DSP unit receive described time delay percent information, regulate the time delay ratio of each voice-grade channel according to time delay percent information, send corresponding time delay simulated audio signal to each voice-grade channel after DAC changes；
Position audio receiver is set at automotive headrest, by amplitude-frequency signal ADC conversion sampling in the sound wave that position audio receiver will receive, correct by delivering to audio frequency DSP unit with default center sound field benchmark comparison operation and carry out data communication to verify or to adjust sound field center with time delay ratio acquisition control unit.
Method based on automotive headrest regulation sound field the most according to claim 5, it is characterised in that described step B specifically includes:
B3, power amplifier and speaker unit receive audio frequency DSP unit and send corresponding time delay simulated audio signal to each voice-grade channel, and speaker sounding is arrived in output after being amplified by power amplifier by described time delay simulated audio signal.
Method based on automotive headrest regulation sound field the most according to claim 5, it is characterised in that described distance to a declared goal is 5-15cm.
Method based on automotive headrest regulation sound field the most according to claim 5, it is characterised in that the number of described headrest infrared sensing detector unit is identical with automotive seat number.
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| CN201410701003.8A CN104469623B (en) | 2014-11-28 | 2014-11-28 | Sound field adjusting system and method based on car pillow |
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| CN107392094A (en) * | 2017-06-14 | 2017-11-24 | 蔚来汽车有限公司 | The system and method for adjust automatically vehicle audio audio pattern |
| US10618443B2 (en) * | 2018-02-01 | 2020-04-14 | GM Global Technology Operations LLC | Method and apparatus that adjust audio output according to head restraint position |
| CN109922411A (en) * | 2019-01-29 | 2019-06-21 | 惠州市华智航科技有限公司 | Sound field control method and sound field control system |
| CN110647304A (en) * | 2019-09-20 | 2020-01-03 | 宝能汽车有限公司 | Method and system for adjusting sound effect of vehicle-mounted sound |
| CN113115199B (en) * | 2021-03-12 | 2022-05-24 | 华南理工大学 | Vehicle-mounted sound reproduction signal delay method adaptive to listening center position |
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| CN101282592A (en) * | 2008-05-15 | 2008-10-08 | 华硕电脑股份有限公司 | Acoustics system with audio field adjusting function as well as method for adjusting audio field |
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