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Noise suppression method and noise suppression system for processing in different frequency bands

A technology of noise suppression and frequency division, applied in speech analysis, telephone structure, instruments, etc., can solve problems affecting call quality, call obstacles, voice deviation, etc., to suppress the spread of noise, enhance voice calls, and improve efficiency. Effect

Active Publication Date: 2020-05-08
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, when a general microphone collects voice data, it is inevitable to collect some noise data. The noise data is generally the environmental noise of the user during a call, and the noise data will be transmitted to the other end of the call along with the user's voice data. ;In general, noise will affect the quality of the call; when it is serious, the noise will cause call barriers, which will cause deviations in the voice conveyed during the call; how to accurately distinguish between voice and noise during the call, and effectively suppress the spread of noise to improve call quality. Quality becomes a big problem

Method used

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  • Noise suppression method and noise suppression system for processing in different frequency bands
  • Noise suppression method and noise suppression system for processing in different frequency bands
  • Noise suppression method and noise suppression system for processing in different frequency bands

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] In the description of the embodiments of the present invention, it should be understood that the terms "first" and "second" are only for convenience and simplification of description of the present invention, and thus should not be construed as limiting the present invention.

[0027] see figure 1 , figure 1 It is a flow chart of a noise suppression method for processing in divided frequency bands in an embodiment of the present invention.

[0028] li...

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Abstract

The invention discloses a noise suppression method for processing in different frequency bands, which is used for suppressing noise in call sound and comprises the following steps of: converting the signal type of acquired sound data into a frequency domain signal from a time domain signal; dividing the frequency domain signal into a low-frequency signal and a medium-high frequency signal, calculating a low-frequency noise power spectrum estimated value according to the amplitude of the low-frequency signal, and calculating a medium-high frequency noise power spectrum estimated value accordingto the amplitude of the medium-high frequency signal; calculating according to the low-frequency noise power spectrum estimated value, the medium-high-frequency noise power spectrum estimated value and the frequency domain signal to obtain a gained frequency domain signal; and converting the gained frequency domain signal into a gained time domain signal. The invention also discloses a noise suppression system for processing in different frequency bands. According to the invention, the noise propagation is inhibited, the voice call quality is improved, and the noise in the call is effectivelyinhibited.

Description

technical field [0001] The invention relates to the technical field of voice communication, in particular to a noise suppression method and system for processing by dividing frequency bands. Background technique [0002] With the development of science and technology, voice calls have gradually replaced handwritten letters. Compared with text communication, voice calls can convey information faster and more accurately; Phrasing, etc. perceive each other's emotions, thereby improving the efficiency of communication. For voice calls at the present stage, a microphone is generally used to collect voice data, the voice data is an analog signal, and then the voice data of the analog signal is converted into a digital signal, which is transmitted to the other party through a wired or wireless method. When the other party receives the digital signal After that, the digital signal is converted to an analog signal for playback. [0003] At present, when a general microphone collect...

Claims

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Application Information

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IPC IPC(8): G10L21/0208G10L21/0232H04M1/19
CPCG10L21/0208G10L21/0232H04M1/19
Inventor 于伟维纪伟潘思伟董斐雍雅琴林福辉
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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