Method and apparatus for voice activity detection

A technology for voice activity and detection equipment, which is applied in the direction of voice analysis, instruments, etc., and can solve problems such as bad, low voice detection accuracy, signal type or signal condition change or unstable change, etc.

Active Publication Date: 2012-10-17
HUAWEI TECH CO LTD
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AI Technical Summary

Problems solved by technology

However, depending on the signal class and signal conditions, conventional voice activity detectors may also produce undesirable results, i.e. the detector may have low voice detection accuracy when detecting the voice activity of the applied input signal
Also, the signal condition and signal type of the applied input signal may change over time, and thus, conventional voice activity detection devices are not robust to signal type or signal condition changes or variations

Method used

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  • Method and apparatus for voice activity detection
  • Method and apparatus for voice activity detection
  • Method and apparatus for voice activity detection

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Embodiment Construction

[0074] figure 1 A block diagram of a voice activity detection device 1 is shown to illustrate the first aspect of the invention. The voice activity detection device 1 comprises at least one signal inlet 2 for receiving an input signal. This input signal is, for example, an audio signal consisting of signal frames. The audio signal may be a digital signal formed from a sequence of signal frames each comprising at least one data sample of the audio signal. The digital signal applied to the voice activity detection device may be provided by an analog-to-digital converter connected to a signal source, eg a microphone of a voice communication device such as a user equipment device or a mobile phone.

[0075] In the illustrated embodiment, the voice activity detection device 1 comprises a signal condition analysis unit 3 which analyzes at least one signal parameter of said input signal to detect a signal condition of the corresponding input signal. Such as figure 1 The voice act...

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Abstract

The present invention provides an apparatus (1) for voice activity detection, comprising: a signal condition analyzing unit (3) which analyses at least one signal parameter of an input signal to detect a signal condition (SC) of the input signal; at least two voice activity detection units (4-i) comprising different voice detection characteristics, wherein each voice activity detection unit (4-i) performs separately the voice activity detection of the input signal to provide a voice activity detection decision (VADD); and a decision combination unit (5) which combines the voice activity detection decisions (VADDs) provided by the voice activity detection units (4-i) depending on the detected signal condition (SC) to provide a combined voice activity detection decision (cVADD).

Description

technical field Background technique [0001] The present invention relates to a method and a device for voice activity detection, and in particular for detecting the presence or absence of human speech in an audio signal suitable for processing by an audio signal processing unit such as an encoder. [0002] Voice Activity Detection (VAD) is generally a technique used to detect voice activity in a signal. Voice activity detection is also known as voice activity detection, or simply speech detection. Voice activity detection can be used in speech applications that detect the presence or absence of human speech. Voice activity detection can be used, for example, in speech coding or speech recognition. Since voice activity detection is relevant to a variety of voice-based applications, various VAD algorithms have been developed that offer diverse characteristics and compromise between requirements such as delay, sensitivity, accuracy, and computational complexity. Some voice a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L11/02G10L21/02G10L19/00G10L25/78
CPCG10L2025/786G10L25/78
Inventor 阿里斯·塔勒布王喆许剑峰苗磊
Owner HUAWEI TECH CO LTD
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