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Voice frequency compression method of digital deaf-aid

A technology of speech frequency and compression method, which is applied in hearing aids, speech analysis, instruments, etc., and can solve the problems of hearing restoration for patients with high-frequency hearing loss

Inactive Publication Date: 2006-11-29
北京大学科技开发有限公司
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Problems solved by technology

[0005] Based on this new hearing aid strategy, the present invention proposes a new hearing aid frequency band compression method to solve the hearing restoration problem of patients with severe high-frequency hearing loss

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Embodiment Construction

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings of the present invention.

[0019] Introduce the digital hearing aid frequency compression method that the present invention proposes below in conjunction with example, the realization process of this method is as follows figure 1 shown. The input signal is a speech signal with 16bit quantization and 16000Hz sampling rate, the signal bandwidth is 8000Hz, the output signal bandwidth is 2000Hz, and the sampling rate and quantization precision remain unchanged. The specific implementation steps are as follows:

[0020] 1. Time-frequency transformation

[0021] A frame of short-time signal (512 samples) is converted to frequency domain by Fourier transform with Hanning window. And through the Fourier transform coefficient X i , and further obtain the power spectrum of the signal.

[0022]...

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Abstract

A method for compressing voice frequency of digital deaf-aid includes carrying out time frequency domain conversion by utilizing a windowing Fourier transform, using slope of signal to digital spectrum to judge energy distribution of voice signal and dynamically regulating voice spectrum, realizing low-pass filter by removing off high spectrum coefficient and compressing voice band by regulating spectrum envelope.

Description

technical field [0001] The invention belongs to the technical field of speech signal processing, and relates to a speech processing method of a digital hearing aid, in particular to a speech processing method of a digital hearing aid for treating severe high-frequency hearing loss. Background technique [0002] Speech communication is the basic way of communication in human society, and it is also one of the basic living abilities of individuals. However, for those deaf patients, the impairment of speech communication due to hearing loss seriously affects their quality of life. This not only brought great pain to himself and his family, but also increased the burden on the whole society. According to a statistics released by the China Disabled Persons' Federation on February 7, 2002, there are 20.57 million disabled people with hearing and speech impairments in my country, accounting for 34.3% of the total number of 60 million disabled people in the country. In addition, d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/02G10L21/04G10L19/00H04R25/00G10L19/26
Inventor 迟惠生吴玺宏张志平陈婧
Owner 北京大学科技开发有限公司
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