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Cobra VAD — Android Quick Start

Platforms

  • Android (5.0+)

Requirements

  • Picovoice Account and AccessKey
  • Android Studio
  • Android device with USB debugging enabled or Android simulator

Picovoice Account & AccessKey

Signup or Login to Picovoice Console to get your AccessKey. Make sure to keep your AccessKey secret.

Quick Start

Setup

  1. Install Android Studio .

  2. Include mavenCentral() repository in the top-level build.gradle. Then add the following to the app's build.gradle:

dependencies {
// ...
implementation 'ai.picovoice:cobra-android:${LATEST_VERSION}' // replace with latest version
}
  1. Add the following to the app's AndroidManifest.xml file to enable recording with an Android device's microphone:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />

Usage

Create an instance of the Cobra VAD engine:

import ai.picovoice.cobra.Cobra;
import ai.picovoice.cobra.CobraException;
try {
Cobra cobra = new Cobra("${ACCESS_KEY}");
} catch (CobraException e) { }

Pass in frames of audio to the .process function:

short[] getNextAudioFrame(){
// .. get audioFrame
return audioFrame;
}
while(true) {
try {
float voiceProbability = cobra.process(getNextAudioFrame());
// take action based on probability of voice
} catch (CobraException e) { }
}

Release resources explicitly when done with Cobra:

cobra.delete()

Demo

For the Cobra Android SDK, we offer demo applications that demonstrate how to use the VAD engine on real-time audio streams (i.e. microphone input).

Setup

Clone the Repository

git clone --recurse-submodules https://github.com/Picovoice/cobra.git

Usage

  1. Open the Android Activity demo using Android Studio.

  2. Copy your AccessKey from Picovoice Console into the ACCESS_KEY variable in MainActivity.java .

  3. Run the application using a connected Android device or using an Android simulator.

For more information on our Cobra demos for Android, head over to our Github repository .

Resources

Package

  • cobra-android on Maven Central

API

  • cobra-android API Docs

GitHub

  • Cobra Android SDK on GitHub
  • Cobra Android Demos on GitHub

Benchmark

  • Voice Activity Benchmark

Further Reading

  • Yet Another Voice Activity Detection Engine

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Cobra VAD — Android Quick Start
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