Leopard
On-device speech-to-text engine powered by deep learning
Install / Use
/learn @Picovoice/LeopardREADME
Leopard
Made in Vancouver, Canada by Picovoice
Leopard is an on-device speech-to-text engine. Leopard is:
- Private; All voice processing runs locally.
- Accurate
- Compact and Computationally-Efficient
- Cross-Platform:
- Linux (x86_64), macOS (x86_64, arm64), Windows (x86_64, arm64)
- Android and iOS
- Chrome, Safari, Firefox, and Edge
- Raspberry Pi (3, 4, 5)
Table of Contents
AccessKey
AccessKey is your authentication and authorization token for deploying Picovoice SDKs, including Leopard. Anyone who is using Picovoice needs to have a valid AccessKey. You must keep your AccessKey secret. You would need internet connectivity to validate your AccessKey with Picovoice license servers even though the voice recognition is running 100% offline.
AccessKey also verifies that your usage is within the limits of your account. You can see your usage limits and real-time usage on your Picovoice Console Profile. To continue using Picovoice after your trial or renew and adjust your usage limits, please reach out to our Enterprise Sales Team or your existing Picovoice contact.
Language Support
- English, French, German, Italian, Japanese, Korean, Portuguese, and Spanish.
- Support for additional languages is available for commercial customers on a case-by-case basis.
Demos
Python Demos
Install the demo package:
pip3 install pvleoparddemo
Run the following in the terminal:
leopard_demo_file --access_key ${ACCESS_KEY} --audio_paths ${AUDIO_FILE_PATH}
Replace ${ACCESS_KEY} with yours obtained from Picovoice Console and ${AUDIO_FILE_PATH} with a path to an audio file you
wish to transcribe.
C Demo
Build the demo:
cmake -S demo/c/ -B demo/c/build && cmake --build demo/c/build
Run the demo:
./demo/c/build/leopard_demo -a ${ACCESS_KEY} -l ${LIBRARY_PATH} -m ${MODEL_FILE_PATH} ${AUDIO_FILE_PATH}
Replace ${ACCESS_KEY} with yours obtained from Picovoice Console, ${LIBRARY_PATH} with the path to appropriate
library under lib, ${MODEL_FILE_PATH} to path to default model file
(or your custom one), and ${AUDIO_FILE_PATH} with a path to an audio file you wish to transcribe.
iOS Demo
To run the demo, go to demo/ios/LeopardDemo and run:
pod install
Replace let accessKey = "${YOUR_ACCESS_KEY_HERE}" in the file ViewModel.swift with your AccessKey.
Then, using Xcode, open the generated LeopardDemo.xcworkspace and run the application.
Android Demo
Using Android Studio, open demo/android/LeopardDemo as an Android project and then run the application.
Replace "${YOUR_ACCESS_KEY_HERE}" in the file MainActivity.java with your AccessKey.
Node.js Demo
Install the demo package:
yarn global add @picovoice/leopard-node-demo
Run the following in the terminal:
leopard-file-demo --access_key ${ACCESS_KEY} --input_audio_file_path ${AUDIO_FILE_PATH}
Replace ${ACCESS_KEY} with yours obtained from Picovoice Console and ${AUDIO_FILE_PATH} with a path to an audio file you
wish to transcribe.
For more information about Node.js demos go to demo/nodejs.
Flutter Demo
To run the Leopard demo on Android or iOS with Flutter, you must have the Flutter SDK installed on your system. Once installed, you can run flutter doctor to determine any other missing requirements for your relevant platform. Once your environment has been set up, launch a simulator or connect an Android/iOS device.
Run the prepare_demo script from demo/flutter with a language code to set up the demo in the language of your choice (e.g. de -> German, ko -> Korean). To see a list of available languages, run prepare_demo without a language code.
dart scripts/prepare_demo.dart ${LANGUAGE}
Replace "${YOUR_ACCESS_KEY_HERE}" in the file main.dart with your AccessKey.
Run the following command from demo/flutter to build and deploy the demo to your device:
flutter run
React Native Demo
To run the React Native Leopard demo app you will first need to set up your React Native environment. For this, please refer to React Native's documentation. Once your environment has been set up, navigate to demo/react-native/LeopardDemo/src to run the following commands:
For Android:
yarn android-install # sets up environment
yarn android-run ${LANGUAGE} # builds and deploys to Android
For iOS:
yarn ios-install # sets up environment
yarn ios-run ${LANGUAGE} # builds and deploys to iOS
Java Demo
The Leopard Java demo is a command-line application that lets you choose between running Leopard on an audio file or on microphone input.
From demo/java run the following commands from the terminal to build and run the file demo:
cd demo/java
./gradlew build
cd build/libs
java -jar leopard-file-demo.jar -a ${ACCESS_KEY} -i ${AUDIO_FILE_PATH}
Replace ${ACCESS_KEY} with yours obtained from Picovoice Console and ${AUDIO_FILE_PATH} with a path to an audio file you wish to transcribe.
For more information about Java demos go to demo/java.
.NET Demo
Leopard .NET demo is a command-line application that lets you choose between running Leopard on an audio file or on real-time microphone input.
From demo/dotnet/LeopardDemo run the following in the terminal:
dotnet run -c FileDemo.Release -- --access_key ${ACCESS_KEY} --input_audio_path ${AUDIO_FILE_PATH}
Replace ${ACCESS_KEY} with yours obtained from Picovoice Console and ${AUDIO_FILE_PATH} with a path to an audio file you
wish to transcribe.
For more information about .NET demos, go to demo/dotnet.
Web Demos
Vanilla JavaScript and HTML
From demo/web run the following in the terminal:
yarn
yarn start
(or)
npm install
npm run start
Open http://localhost:5000 in your browser to try the
