Method for fast dynamic estimation of background noise

A background noise and dynamic estimation technology, applied in computing, communication between multiple stations, special data processing applications, etc., can solve problems such as intrusion and VAD cannot adapt quickly

Inactive Publication Date: 2005-10-19
GOOGLE TECH HLDG LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

VAD cannot quickly adapt to the recognition of increased background noise levels
This causes the noise level to break in and lock the channel

Method used

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  • Method for fast dynamic estimation of background noise
  • Method for fast dynamic estimation of background noise
  • Method for fast dynamic estimation of background noise

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Embodiment Construction

[0012] Although the description ultimately boils down to claims defining the features of the invention which are believed to be novel, it is believed that the invention will be better understood upon consideration of the following description in conjunction with the accompanying drawings, in which like reference numerals have been used. Typically in audio equipment, speech and other audio data is divided into frames. Various parameters such as energy parameters and pronunciation pattern parameters are included in each frame. The pronunciation mode parameter is a value indicating a pitch component or a frame period. Typically, smaller articulation mode values ​​indicate fricatives, while higher values ​​indicate tonal sounds, such as vowels.

[0013] These parameters mentioned above can be generated by the transmitting device so that the portable communication device receiving the information has the parameters available. Optionally, the receiving device may calculate the par...

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Abstract

The invention provides a method and system for dynamically estimating background noise. The system includes a portable communication device, a vocoder, and a voice trigger detector. Based on the information received by the portable communication device, the vocoder determines parameters related to the incoming message, including an utterance pattern indicative of a periodicity of the incoming message. The voice trigger detector then compares the utterance pattern to a threshold to determine whether to update the background noise estimate. The method includes the steps of: receiving a period indicator of an input speech frame and a current moderate noise level; if the current moderate noise level is equal to a previous moderate noise level, comparing the period indicator to a predetermined threshold; and if the period indicator exceeds the predetermined threshold The background noise estimate is then maintained, and if the period indicator does not exceed a predetermined threshold, the background noise estimate is revised.

Description

technical field [0001] The present invention relates generally to mobile units and, more particularly, to portable communication devices operable in a hands-free phone mode. Background technique [0002] Speakerphones are used by individuals and businesses in a variety of settings to facilitate communication between multiple parties and to provide a hands-free setup. Hands-free phones are often used in cars so that the user does not have to deal with the receiver while driving the car. Most speakerphones are half-duplex speakerphones, in which only one party can occupy the communication channel at a time. Once one party acquires the channel, the other party must wait until the channel is free to continue. [0003] If the speakerphone is used in an environment where the noise level suddenly increases, the output audio will be temporarily muted. For example, in a car, car acceleration increases the overall noise level, so when the car is in motion, the output audio is silen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00G10L11/02G10L19/00G10L21/02H04B7/26H04M1/60
CPCG10L25/78G10L2021/02168G10L19/012G06F17/00G10L21/0216
Inventor 阿里·贝布迪恩普拉蒂克·德赛黄展鹏
Owner GOOGLE TECH HLDG LLC
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