pvcobra 1.1.0

Cobra voice activity detection (VAD) engine

Cobra Voice Activity Detection Engine

Made in Vancouver, Canada by Picovoice

Cobra is a highly accurate and lightweight voice activity detection (VAD) engine.

Compatibility

• Python 3.5+
• Runs on Linux (x86_64), macOS (x86_64), Windows (x86_64), Raspberry Pi, NVIDIA Jetson (Nano), and BeagleBone.

Installation

pip3 install pvcobra

Usage

Create an instance of the engine

import pvcobra

handle = pvcobra.create(access_key=${AccessKey})

Replace ${AccessKey} with your AccessKey obtained from Picovoice Console. handle is an instance of Cobra.

When initialized, the valid sample rate is given by handle.sample_rate. Expected frame length (number of audio samples in an input array) is handle.frame_length. The engine accepts 16-bit linearly-encoded PCM and operates on single-channel audio.

def get_next_audio_frame():
    pass

while True:
    voice_probability = handle.process(get_next_audio_frame())

When done, resources have to be released explicitly:

handle.delete()

Demos

pvcobrademo provides command-line utilities for processing real-time audio (i.e. microphone) and files using Cobra.