CN105578354A - Loudspeaker denoising method based on FT platform - Google Patents
Loudspeaker denoising method based on FT platform Download PDFInfo
- Publication number
- CN105578354A CN105578354A CN201510985576.2A CN201510985576A CN105578354A CN 105578354 A CN105578354 A CN 105578354A CN 201510985576 A CN201510985576 A CN 201510985576A CN 105578354 A CN105578354 A CN 105578354A
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- audio
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- loud speaker
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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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
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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
- H04R2203/00—Details of circuits for transducers, loudspeakers or microphones covered by H04R3/00 but not provided for in any of its subgroups
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention discloses a loudspeaker denoising method based on a soar platform. The specific implementation process of the loudspeaker denoising method is as follows: a PSOC chip is contained, the PSOC chip is connected to an audio control chip and a loudspeaker through an pop noise elimination module, the audio control module and the loudspeaker communicate with each other, the audio control module is further connected to a USB HUB controller through a USB interface, and the USB HUB controller is connected with a CPU chip through a coprocessor; and the pop noise elimination module pulls down abnormal pulse generated at the moment of startup or shutdown by a transistor to prevent noise from being transmitted to the loundspeaker. Compared with the prior art, according to the loudspeaker denoising method based on the PT platform, an audio output device provided with the pop noise elimination module can filter pop noise generated during power up and power down of an audio chip at the startup moment of the device, so that the sound output quality of the audio device can be greatly improved, and a noise filtering function is realized.
Description
Technical field
The present invention relates to field of computer technology, specifically a kind of practical, based on the loud speaker noise-reduction method of platform of soaring.
Background technology
There is the equipment that audio frequency exports; audio-frequency power amplifier is part important in its system; the quality of its performance and the work of normal table can have very important effect to equipment; existing audio frequency and video output equipment is when switching on and shutting down; or when equipment enters sleep, resting state and wakes up in above-mentioned state; its audio control chip often can produce explosion sound (popnoise) in the moment of power supply and power-off, affects the normal use of people.For improving product quality, the invention provides a kind of loud speaker noise-reduction method based on platform of soaring, the method increases explosive sound cancellation module on the notebook mainboard of platform of soaring, and sets about in noise source itself, by external noise reduction circuit and audio chip cooperation filtering explosion sound.
Summary of the invention
Technical assignment of the present invention is for above weak point, provide a kind of practical, based on the loud speaker noise-reduction method of platform of soaring.
A kind of loud speaker noise-reduction method based on platform of soaring, its specific implementation process is: comprise PSOC chip, this PSOC chip is connected to audio control chip and loud speaker by explosive sound cancellation module, be interconnected between this audio frequency control module and loud speaker and audio frequency control module is also connected to USBHUB controller by USB interface, this USBHUB controller connects cpu chip by coprocessor; Above-mentioned explosive sound cancellation module drags down start or the abnormal pulsers produced instantaneously that shuts down by transistor, stops noise to pass to loud speaker.
The course of work of described explosive sound cancellation module is: when system boot, system loads audio driven, before audio control chip resets, PSOC chip sends and controls the enable of erasure signal, activate explosive sound erasure signal, the power amplification being closed to loud speaker exports, thus the explosive sound that filtering is corresponding.
Described explosive sound cancellation module concrete structure comprises signal generator module and audio-frequency power amplifier, wherein signal generator module is used for the drive singal signal that PSOC chip sends being converted to audio-frequency power amplifier, the signal at stop that audio-frequency power amplifier then produces according to signal generator module exports to the power amplification of loud speaker, filtering explosive sound.
Described signal generator module concrete structure is:
The power input connecting PSOC chip connects the b pole of transistor Q1, e pole ground connection, the c pole of transistor Q1 are divided into three branch roads after resistance R1, one tunnel is connected to the b pole that voltage input one, one road is connected to transistor Q2 after resistance R2, and a road is through electric capacity C1 ground connection;
The e pole of transistor Q2 connects voltage input one, c pole and is divided into two branch roads, and a road is ground connection after resistance R3, and a road is connected to the G pole of metal-oxide-semiconductor;
The S pole ground connection of this metal-oxide-semiconductor, D pole are then divided into two branch roads, and a road connects voltage input two after resistance R4, and another road is connected to signal output part.
A kind of loud speaker noise-reduction method based on platform of soaring of the present invention, has the following advantages:
A kind of loud speaker noise-reduction method based on platform of soaring of the present invention controls audio chip by PSOC (ProgrammableSystem-On-Chip), add explosive sound cancellation module audio output apparatus can facility switching machine moment, filtering audio chip powers on and the Popnoise produced during power down, greatly can improve the voice output quality of audio frequency apparatus, realize noise filtering function, practical, be easy to promote.
Accompanying drawing explanation
Accompanying drawing 1 is overall structure schematic diagram of the present invention.
Accompanying drawing 2 is signal generator module schematic diagram.
Accompanying drawing 3 is explosive sound cancellation module overall schematic.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
The invention provides a kind of loud speaker noise-reduction method based on platform of soaring, as shown in accompanying drawing 1, Fig. 2, Fig. 3, its specific implementation process is: comprise PSOC chip, this PSOC chip is connected to audio control chip and loud speaker by explosive sound cancellation module, be interconnected between this audio frequency control module and loud speaker and audio frequency control module is also connected to USBHUB controller by USB interface, this USBHUB controller connects cpu chip by coprocessor; Above-mentioned explosive sound cancellation module drags down start or the abnormal pulsers produced instantaneously that shuts down by transistor, noise is stoped to pass to loud speaker, because transistor has very high input impedance, larger power gain, can control the supply power voltage that audio chip provides for loud speaker fast and effectively.
The course of work of described explosive sound cancellation module is: when system boot, system loads audio driven, before audio control chip resets, PSOC chip sends and controls the enable of erasure signal, activate explosive sound erasure signal, the power amplification being closed to loud speaker exports, thus the explosive sound that filtering is corresponding.
Described explosive sound cancellation module concrete structure comprises signal generator module and audio-frequency power amplifier, wherein signal generator module is used for the drive singal signal that PSOC chip sends being converted to audio-frequency power amplifier, the signal at stop that audio-frequency power amplifier then produces according to signal generator module exports to the power amplification of loud speaker, filtering explosive sound.
Described signal generator module concrete structure is:
The power input connecting PSOC chip connects the b pole of transistor Q1, e pole ground connection, the c pole of transistor Q1 are divided into three branch roads after resistance R1, one tunnel is connected to the b pole that voltage input one, one road is connected to transistor Q2 after resistance R2, and a road is through electric capacity C1 ground connection;
The e pole of transistor Q2 connects voltage input one, c pole and is divided into two branch roads, and a road is ground connection after resistance R3, and a road is connected to the G pole of metal-oxide-semiconductor;
The S pole ground connection of this metal-oxide-semiconductor, D pole are then divided into two branch roads, and a road connects voltage input two after resistance R4, and another road is connected to signal output part.
The working mechanism of signal generator module realizes mainly through PSOC.Start sequential is controlled by CPLD (ComplexProgrammableLogicDevice), press key and start timing, system loads audio driven, before CM6300 audio chip resets, PSOC chip enable HW_DE_POP_PSOC, thus drive SPK_OUT_CLOSE#.PSOC chip, while detecting off signal, activates SPK_OUT_CLOSE#.
As shown in Figure 3, SPK_OUT_CLOSE# signal controls audio-frequency power amplifier at the significant instant of correspondence, and when it is effective, audio-frequency power amplifier can be closed chip and be exported to the power amplification of loud speaker, thus the explosion sound in filtering correspondence moment.
When actual installation, cpu chip adopts FT1000A, and this cpu chip is connected to MCS9990 by PCIE bus; MCS9990 is that PCIE bus produces four road usb bus, i.e. the model of coprocessor employing; USB2514 is the model that USBHUB controller adopts; CM6300 is the model that audio control chip adopts, and it can peripheral earphone interface, microphone interface and loud speaker; Explosive sound cancellation module is then for the circuit of filtering Popnoise; The model that audio-frequency power amplifier adopts is LM4866.
Above-mentioned embodiment is only concrete case of the present invention; scope of patent protection of the present invention includes but not limited to above-mentioned embodiment; claims of any a kind of loud speaker noise-reduction method based on platform of soaring according to the invention and the those of ordinary skill of any described technical field to its suitable change done or replacement, all should fall into scope of patent protection of the present invention.
Claims (4)
1. the loud speaker noise-reduction method based on platform of soaring, it is characterized in that, its specific implementation process is: comprise PSOC chip, this PSOC chip is connected to audio control chip and loud speaker by explosive sound cancellation module, be interconnected between this audio frequency control module and loud speaker and audio frequency control module is also connected to USBHUB controller by USB interface, this USBHUB controller connects cpu chip by coprocessor; Above-mentioned explosive sound cancellation module drags down start or the abnormal pulsers produced instantaneously that shuts down by transistor, stops noise to pass to loud speaker.
2. a kind of loud speaker noise-reduction method based on platform of soaring according to claim 1, it is characterized in that, the course of work of described explosive sound cancellation module is: when system boot, system loads audio driven, before audio control chip resets, PSOC chip sends and controls the enable of erasure signal, activates explosive sound erasure signal, the power amplification being closed to loud speaker exports, thus the explosive sound that filtering is corresponding.
3. a kind of loud speaker noise-reduction method based on platform of soaring according to claim 2, it is characterized in that, described explosive sound cancellation module concrete structure comprises signal generator module and audio-frequency power amplifier, wherein signal generator module is used for the drive singal signal that PSOC chip sends being converted to audio-frequency power amplifier, the signal at stop that audio-frequency power amplifier then produces according to signal generator module exports to the power amplification of loud speaker, filtering explosive sound.
4. a kind of loud speaker noise-reduction method based on platform of soaring according to claim 3, it is characterized in that, described signal generator module concrete structure is:
The power input connecting PSOC chip connects the b pole of transistor Q1, e pole ground connection, the c pole of transistor Q1 are divided into three branch roads after resistance R1, one tunnel is connected to the b pole that voltage input one, one road is connected to transistor Q2 after resistance R2, and a road is through electric capacity C1 ground connection;
The e pole of transistor Q2 connects voltage input one, c pole and is divided into two branch roads, and a road is ground connection after resistance R3, and a road is connected to the G pole of metal-oxide-semiconductor;
The S pole ground connection of this metal-oxide-semiconductor, D pole are then divided into two branch roads, and a road connects voltage input two after resistance R4, and another road is connected to signal output part.
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| CN201510985576.2A CN105578354B (en) | 2015-12-25 | 2015-12-25 | A kind of loudspeaker noise-reduction method based on platform of soaring |
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| CN105578354B CN105578354B (en) | 2018-12-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109729479A (en) * | 2017-10-31 | 2019-05-07 | 华为技术有限公司 | Audio playing circuit and audio-frequence player device |
| CN113110241A (en) * | 2021-05-13 | 2021-07-13 | 中科可控信息产业有限公司 | Electronic equipment and audio control method thereof |
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| US5818948A (en) * | 1996-10-23 | 1998-10-06 | Advanced Micro Devices, Inc. | Architecture for a universal serial bus-based PC speaker controller |
| CN201910249U (en) * | 2010-12-29 | 2011-07-27 | 上海博泰悦臻电子设备制造有限公司 | Vehicle-mounted terminal and audio device thereof |
| CN102811026A (en) * | 2011-05-30 | 2012-12-05 | 嘉兴禾润电子科技有限公司 | Class D audio power amplifier for noise suppression and audio signal processing method thereof |
| CN103248985A (en) * | 2012-02-03 | 2013-08-14 | 安凯(广州)微电子技术有限公司 | Noise-suppression circuit provided with blocking capacitor of audio amplifier |
| CN204014030U (en) * | 2014-06-24 | 2014-12-10 | 比亚迪股份有限公司 | Eliminate the circuit of pop noise |
| CN104640028A (en) * | 2015-03-05 | 2015-05-20 | 浪潮集团有限公司 | Audio frequency MUTE circuit based on completely homemade Feiteng processor platform |
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2015
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Patent Citations (6)
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| US5818948A (en) * | 1996-10-23 | 1998-10-06 | Advanced Micro Devices, Inc. | Architecture for a universal serial bus-based PC speaker controller |
| CN201910249U (en) * | 2010-12-29 | 2011-07-27 | 上海博泰悦臻电子设备制造有限公司 | Vehicle-mounted terminal and audio device thereof |
| CN102811026A (en) * | 2011-05-30 | 2012-12-05 | 嘉兴禾润电子科技有限公司 | Class D audio power amplifier for noise suppression and audio signal processing method thereof |
| CN103248985A (en) * | 2012-02-03 | 2013-08-14 | 安凯(广州)微电子技术有限公司 | Noise-suppression circuit provided with blocking capacitor of audio amplifier |
| CN204014030U (en) * | 2014-06-24 | 2014-12-10 | 比亚迪股份有限公司 | Eliminate the circuit of pop noise |
| CN104640028A (en) * | 2015-03-05 | 2015-05-20 | 浪潮集团有限公司 | Audio frequency MUTE circuit based on completely homemade Feiteng processor platform |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109729479A (en) * | 2017-10-31 | 2019-05-07 | 华为技术有限公司 | Audio playing circuit and audio-frequence player device |
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| CN113110241A (en) * | 2021-05-13 | 2021-07-13 | 中科可控信息产业有限公司 | Electronic equipment and audio control method thereof |
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| CN105578354B (en) | 2018-12-25 |
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