Skip to main content
NVIDIA
Explore
Models
Skills
Blueprints
GPUs
Docs
Help Center
Getting Started
  1. Create and verify your account to unlock full access to NVIDIA NIM APIs.
ResourcesDeveloper ForumsContact Support
FAQs
  • Terms of Use
    Privacy Policy
    Your Privacy Choices
    Contact

    Copyright © 2026 NVIDIA Corporation

    NVIDIA

    Background Noise Removal

    DownloadableFree Endpoint

    Removes unwanted noises from audio improving speech intelligibility.

    • communications
    • denoising
    • nvidia ai for media
    • speech enhancement
    Get API Key
    API ReferenceAPI Reference
    Accelerated by DGX Cloud

    Getting Started

    NVIDIA Background Noise Removal NIM uses gRPC APIs for inferencing requests. Following instructions demonstrate the usage of BNR NIM model using Python client.

    Prerequisites

    You will need a system with git and Python 3.10+ installed.

    Setup NVIDIA BNR Python client

    Download the BNR Python client code by cloning the NIM gRPC Client Repository:

    git clone https://github.com/NVIDIA-Maxine/nim-clients.git
cd nim-clients/bnr

    Install the dependencies for the NVIDIA BNR Python client:

    sudo apt-get install python3-pip
pip install -r requirements.txt

    Run Python Client

    Navigate to the scripts directory.

    cd scripts

    Send the gRPC requests

    python bnr.py --preview-mode \
    --ssl-mode TLS \
    --target grpc.nvcf.nvidia.com:443 \
    --function-id c95bfe76-c553-4975-bc18-8ef9d6e2666b \
    --api-key $NVIDIA_API_KEY \
    --input <input_file_path> \
    --output <output_file_path> \
    --streaming False

    Note the requirements for input file:

    • The supported format is 16-bit mono channel wav file.
    • The size limit for input file is 35 MB.
    • The duration limit for input file is 6 min.

    Command line arguments:

    • --preview-mode - Flag to send request to preview NVCF server on https://build.nvidia.com/nvidia/bnr/api.
    • --ssl-mode - Set the SSL mode to TLS or MTLS. Defaults to no SSL. When running preview, TLS mode must be used with default root certificate.
    • --target <ip:port> - URI of NIM's gRPC service. Use grpc.nvcf.nvidia.com:443 when hosted on NVCF. (Default: 127.0.0.1:8001)
    • --api-key $NVIDIA_API_KEY - NGC API key required for authentication. Utilized when using TRY API ignored otherwise.
    • --function-id <function_id> - Function ID for the feature.
    • --input <input_file_path> - The path to the input audio file. (Default: ../assets/bnr_48k_input.wav)
    • --output <output_file_path> - The path to the output audio file. (Default: ./bnr_48k_output.wav)
    • --streaming - Flag to control if streaming or transactional mode should be used. Streaming mode will be used by default, set to False to enable transactional mode.
    • --intensity-ratio - Intensity ratio value between 0 and 1 to control denoising intensity. Default is 1.0 (maximum denoising).

    Refer the BNR NIM documentation for more information.