Title:
AMPLITUDE LIMITING APPARATUS AND AMPLITUDE LIMITING METHOD
Document Type and Number:
WIPO Patent Application WO/2023/082159
Kind Code:
A1
Abstract:
The embodiments of the present application relate to the technical field of audio. Disclosed are an amplitude limiting apparatus and an amplitude limiting method, which alleviate the problem in the prior art of the service life of a loudspeaker being short and even the loudspeaker being damaged due to the fact that the displacement of a diaphragm is too large or the temperature of the loudspeaker is too high. The specific solution is: the amplitude limiting apparatus comprises a prediction circuit, a gain estimation circuit and a multiplier, wherein a first input end of the multiplier is used for receiving an audio signal, an output end of the amplitude limiting apparatus is coupled to an input end of the gain estimation circuit by means of the prediction circuit, and an output from the gain estimation circuit is fed back to a second input end of the multiplier; the prediction circuit is used for predicting the displacement of a diaphragm and/or the temperature of a voice coil of a loudspeaker on the basis of the audio signal which is output by the amplitude limiting apparatus; the gain estimation circuit is used for obtaining a gain estimation value on the basis of an amplitude limiting parameter predicted by the prediction circuit; and the multiplier is used for multiplying the received audio signal by the gain estimation value, so as to obtain an amplitude-limited audio signal, and the output end of the amplitude limiting apparatus outputs the amplitude-limited audio signal.
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Inventors:
YAN ZHANPENG (CN)
PAAAHO JOUNI (CN)
DU LIANG (CN)
LIAO WENTING (CN)
KE BO (CN)
REN BO (CN)
PAAAHO JOUNI (CN)
DU LIANG (CN)
LIAO WENTING (CN)
KE BO (CN)
REN BO (CN)
Application Number:
PCT/CN2021/130175
Publication Date:
May 19, 2023
Filing Date:
November 11, 2021
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H04R3/00; H03G3/20; H04R29/00
Foreign References:
| CN107317559A | 2017-11-03 | |||
| CN105471355A | 2016-04-06 | |||
| CN111541975A | 2020-08-14 | |||
| CN106817655A | 2017-06-09 | |||
| US20150215704A1 | 2015-07-30 | |||
| CN110868653A | 2020-03-06 | |||
| CN105120414A | 2015-12-02 | |||
| EP2806656A1 | 2014-11-26 | |||
| TW564592B | 2003-12-01 | |||
| US10897670B1 | 2021-01-19 |
Attorney, Agent or Firm:
BEIJING ZBSD PATENT & TRADEMARK AGENT LTD. (CN)
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