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Rhino Speech-to-Intent
Java Quick Start

Platforms

  • Linux (x86_64)
  • macOS (x86_64, arm64)
  • Windows (x86_64, arm64)
  • Raspberry Pi (3, 4, 5)

Requirements

  • Picovoice Account and AccessKey
  • Java 11+

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 JDK 11+.

  2. Install the Java binding from the Maven Central Repository at:

ai.picovoice:rhino-java:${version}

Usage

Create an instance of Rhino Speech-to-Intent that infers intent from spoken commands within a given context:

import ai.picovoice.rhino.*;
Rhino rhino = new Rhino.Builder()
.setAccessKey("${ACCESS_KEY}")
.setContextPath("${CONTEXT_FILE_PATH}")
.build();

Pass in frames of audio to the .process function:

short[] getNextAudioFrame() {
// ...
return audioFrame;
}
while(true) {
boolean isFinalized = rhino.process(getNextAudioFrame());
if(isFinalized){
RhinoInference inference = rhino.getInference();
if(inference.getIsUnderstood()){
String intent = inference.getIntent();
Map<string, string> slots = inference.getSlots();
// .. Use intent and slot values
}
}
}

Release resources explicitly when done with Rhino Speech-to-Intent:

rhino.delete();

Custom Contexts

Create custom contexts on Picovoice Console using the Rhino Speech-to-Intent Grammar. Download the custom context file (.rhn) and create an instance of Rhino using the .setContextPath build method.

Non-English Languages

Use the corresponding model file (.pv) to detect non-English contexts. The model files for all supported languages are available on the Rhino Speech-to-Intent GitHub repository.

Pass in the model file using the setModelPath build method to change the detection language:

Rhino rhino = new Rhino.Builder()
.setAccessKey("${ACCESS_KEY}")
.setContextPath("${CONTEXT_FILE_PATH}")
.setModelPath("${MODEL_FILE_PATH}")
.build();

Demo

For the Rhino Speech-to-Intent Java SDK, we offer demo applications that demonstrate how to use the Speech-to-Intent engine on real-time audio streams (i.e. microphone input) and audio files.

Setup

  1. Clone the Rhino Speech-to-Intent repository from GitHub:
git clone --recurse-submodules https://github.com/Picovoice/rhino.git
  1. Build the Rhino Speech-to-Intent Java demo using Gradle:
cd rhino/demo/java
./gradlew build

Usage

To see the usage options for the demos, use the -h flag:

java -jar build/libs/rhino-mic-demo.jar -h

Ensure you have a working microphone connected to your system and run the following command to make inferences based on the given context file:

java -jar build/libs/rhino-mic-demo.jar -a ${ACCESS_KEY} -c ${CONTEXT_FILE_PATH}

For more information on our Rhino Speech-to-Intent demos for Java, head over to our GitHub repository.

Resources

Package

  • ai.picovoice:rhino-java on the Maven Central Repository

API

  • ai.picovoice:rhino-java API Docs

GitHub

  • Rhino Speech-to-Intent Java SDK on GitHub
  • Rhino Speech-to-Intent Java Demos on GitHub

Benchmark

  • Speech-to-Intent Benchmark

Further Reading

  • Prioritizing Privacy: Add Offline Speech Recognition to a Java Application

Video

  • Control Java Swing Application with Offline Speech Recognition

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