CN1296722A - Band stop filter - Google Patents
Band stop filter Download PDFInfo
- Publication number
- CN1296722A CN1296722A CN00800347A CN00800347A CN1296722A CN 1296722 A CN1296722 A CN 1296722A CN 00800347 A CN00800347 A CN 00800347A CN 00800347 A CN00800347 A CN 00800347A CN 1296722 A CN1296722 A CN 1296722A
- Authority
- CN
- China
- Prior art keywords
- signal
- audio signal
- listener
- audio
- audio system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S1/00—Two-channel systems
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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
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
- H04R2430/03—Synergistic effects of band splitting and sub-band processing
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Stereophonic System (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
Bass audio signals can give an annoyance of neighbors (non-voluntary listener) of the listener (voluntary listener). To overcome this band block filters are known, but by blocking the audio signals in the frequency band the perception for the listener is less good. The invention overcomes this problem by combining enhancing means to obtain the so-called ultra bass, with the blocking filter.
Description
The present invention relates to a kind of as claim 1 audio system as described in the preamble.
The invention still further relates to resistance bass filter device.
Learn the audio system that a kind of bass signal is enhanced from European patent application EP-A-0546619 (applicant's reference number PHA 40.624).This realizes that by the psycho-acoustic phenomenon of using so-called empty tone or losing fundamental frequency this causes the illusion of higher bass response, in these low frequency upper speaker and non-radiating more power.Replace by the harmonic wave that uses tone and to occur in audio signal but can't can produce this illusion with all periodicity pitches that little loud speaker produces.Now, harmonic wave is represented drummy speech, so-called subwoofer.Like this, improved the audio signal that the listener received.
Low frequency (bass) signal is offered under the situation of loud speaker not wishing, known audio system can not successfully be worked.The objective of the invention is under low frequency signal can not be provided for the situation of loud speaker, to improve the audio signal that is received.
For this reason, a first aspect of the present invention provides as the defined a kind of audio system of claim 1.
The present invention is based on such understanding, actual low frequency signal is offered under the situation of loud speaker not allowing, for example do not wish to listen to these bass signals because live in the people (passive listener) in next door, may stop these actual low frequency signals, simultaneously by using the subwoofer characteristic to provide bass signal well to feel to the personnel (initiatively listener) of listening to audio signal.
The feature that comprises claim 2 according to a kind of embodiment of audio signal of the present invention.
By stoping the low frequency part of 50 to 120Hz scopes, bothering of neighbours (passive listener) is lowered to minimum.
With reference to hereinafter described and the example in the accompanying drawings, can be used to usually realize that the present invention of advantage of the present invention and bells and whistles will be conspicuous.
Accompanying drawing illustrates a schematic example of square frame of audio system of the present invention.
The figure shows the schematic example of audio system AS.At input I, audio system receives an audio signal.This audio signal is provided for intensifier EM.In this example, intensifier comprises the bandpass filter device BPF that is used to select a part of audio signal (low frequency part).The output of band pass filter and so-called non-linear equipment (for example harmonic wave maker or integrator) coupling.Non-linear equipment generates the harmonic wave of signal that band pass filter provides.
The output of non-linear equipment is provided for the low pass filter that is used for the filtering high fdrequency component.The output signal of intensifier is provided for adding device SUM.In another input, adding device receives the signal from bandreject filtering apparatus BSF, for example low frequency component of bandreject filtering apparatus filtering input audio signal.The output of adding device SUM is provided for the output O of audio system.Output O can be coupled to speaker unit etc.
For example can be as this intensifier of realization EM as described in the European patent application EP 98202998.5 (applicant's reference number PHN17 ' .092), this piece document and corresponding application thereof are incorporated herein by reference.By generating the harmonic wave of original audio signal, improved the sensation of low-frequency band (so-called subwoofer), and do not disturbed passive listener (for example neighbours).
Be not both loud speaker or transmission channel restricted situation in lower band with common " subwoofer " one.
Under situation involved in the present invention, aspect transmission channel (perhaps audio player) and loud speaker all without limits, but be interference in this restriction to neighbours.
Use this audio system, can overcome the interference of low frequency signal (bass signal) on the one hand listener (initiatively listener) neighbours (passive listener).This realizes by bandreject filtering apparatus BSF.On the other hand, use intensifier to improve the sensation of listener's audio signal.
Claims (3)
1. audio system, comprise an input that is used for received audio signal and an output that is used to provide output signal, be used to handle the processing unit and the intensifier of institute's received audio signal, this intensifier comprises the choice device that is used to select a part of audio signal, be used for generating the signal generator of a signal according to the selected part of audio signal, with the adding device that is used for addition audio signal and audio signal enhancing part, it is characterized in that this audio system comprises the bandreject filtering apparatus between input and the adding device, is used to stop a part of audio signal.
2. according to the audio system of claim 1, it is characterized in that the bandreject filtering apparatus has from 50 to 120Hz frequency band.
3. the blocking filting apparatus that in audio system, uses (blocking filter meams) according to claim 1 or 2.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99200907.6 | 1999-03-24 | ||
| EP99200907 | 1999-03-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1296722A true CN1296722A (en) | 2001-05-23 |
Family
ID=8240018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00800347A Pending CN1296722A (en) | 1999-03-24 | 2000-03-06 | Band stop filter |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1080607A1 (en) |
| JP (1) | JP2002540697A (en) |
| KR (1) | KR20010043780A (en) |
| CN (1) | CN1296722A (en) |
| WO (1) | WO2000057673A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800923A (en) * | 2009-06-08 | 2010-08-11 | 瑞声声学科技(深圳)有限公司 | Device and method for inhibition of second resonance mode of vibrating diaphragm |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2982404B1 (en) * | 2011-11-07 | 2014-01-03 | Arkamys | METHOD FOR REDUCING PARASITIC VIBRATIONS OF A SPEAKER ENVIRONMENT FOR PRESERVING PERCEPTION OF THE LOW FREQUENCIES OF THE SIGNAL TO BE DISTRIBUTED AND ASSOCIATED PROCESSING DEVICE |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0546619B1 (en) * | 1991-12-09 | 1998-09-23 | Koninklijke Philips Electronics N.V. | Low frequency audio doubling and mixing circuit |
| TW343417B (en) * | 1996-05-08 | 1998-10-21 | Philips Eloctronics N V | Circuit, audio system and method for processing signals, and a harmonics generator |
| US5930373A (en) * | 1997-04-04 | 1999-07-27 | K.S. Waves Ltd. | Method and system for enhancing quality of sound signal |
| WO1999008380A1 (en) * | 1997-08-08 | 1999-02-18 | Hearing Enhancement Company, L.L.C. | Improved listening enhancement system and method |
-
2000
- 2000-03-06 JP JP2000607443A patent/JP2002540697A/en not_active Withdrawn
- 2000-03-06 CN CN00800347A patent/CN1296722A/en active Pending
- 2000-03-06 KR KR1020007013188A patent/KR20010043780A/en not_active Application Discontinuation
- 2000-03-06 EP EP00909316A patent/EP1080607A1/en not_active Withdrawn
- 2000-03-06 WO PCT/EP2000/001907 patent/WO2000057673A1/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800923A (en) * | 2009-06-08 | 2010-08-11 | 瑞声声学科技(深圳)有限公司 | Device and method for inhibition of second resonance mode of vibrating diaphragm |
| CN101800923B (en) * | 2009-06-08 | 2013-12-11 | 瑞声声学科技(深圳)有限公司 | Device and method for inhibition of second resonance mode of vibrating diaphragm |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002540697A (en) | 2002-11-26 |
| KR20010043780A (en) | 2001-05-25 |
| WO2000057673A1 (en) | 2000-09-28 |
| EP1080607A1 (en) | 2001-03-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |