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# Voice To Noise Ratio Estimator Library

`lib_vnr` is a library which estimates the ratio of speech signal in noise for an input audio stream. `lib_vnr` library functions uses `lib_xcore_math` to perform DSP using low-level optimised operations, and `lib_tflite_micro` and `lib_nn` to perform inference using an optimised TensorFlow Lite model.

Contents

- Repository Structure
- Requirements
- API Structure
- Getting and Building
- VNR Inference Model
- VNR Overview
- API Reference

## On GitHub

`lib_vnr` is present as part of `fwk_voice`. Get the latest version of `fwk_voice` from `https://github.com/xmos/fwk_voice`. The `lib_vnr` module can be found in the modules/lib_vnr directory in `fwk_voice`.