Title:
LOW-COMPLEXITY ADJUSTABLE FILTER BANK FOR DIGITAL HEARING AID AND OPERATING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2016/086849
Kind Code:
A1
Abstract:
A low-complexity adjustable filter bank for a digital hearing aid and an operating method therefor. The filter bank comprises a masking module and a multi-band generation module which are connected in sequence, wherein the masking module is used for dividing received voice signals into three regions, i.e. a low frequency region, a medium frequency region and a high frequency region in accordance with frequencies, and the multi-band generation module is used for giving three different subband decomposition states to each of the three regions, i.e. the low frequency region, the medium frequency region and the high frequency region, and then outputting subband signals. The three different subband decomposition states comprise: state 1: decomposing each region into subbands of which the bandwidth is π/3; state 2: uniformly decomposing each region into two subbands of which the bandwidth is π/6; and state 3: uniformly decomposing each region into four subbands of which the bandwidth is π/12. The method is low in complexity and small in delay, so that the division states of frequency bands can be changed by controlling parameters in the case where the structure of the filter bank is not changed, thereby achieving the goal of performing voice decomposition according to hearing loss characteristics of a patient.
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Inventors:
WEI YING (CN)
LIU DEBAO (CN)
LIU DEBAO (CN)
Application Number:
PCT/CN2015/096155
Publication Date:
June 09, 2016
Filing Date:
December 01, 2015
Export Citation:
Assignee:
UNIV SHANDONG (CN)
International Classes:
H04R25/00
Domestic Patent References:
| WO1997014266A2 | 1997-04-17 |
Foreign References:
| CN104486711A | 2015-04-01 | |||
| CN102984634A | 2013-03-20 |
Other References:
WEI, YING ET AL.: "A Reconfigurable Digital Filterbank for Hearing-Aid Systems With a Variety of Sound Wave Decomposition Plans", IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, vol. 60, no. 6, 30 June 2013 (2013-06-30), pages 1628 - 1634, XP011509833, DOI: doi:10.1109/TBME.2013.2240681
Attorney, Agent or Firm:
JINAN SHENGDA INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
济南圣达知识产权代理有限公司 (CN)
济南圣达知识产权代理有限公司 (CN)
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