Articles by Jean-Marc Valin
A Real-Time Wideband Neural Vocoder at 1.6 kb/s Using LPCNet
This is an update on the LPCNet project, an efficient neural speech synthesizer from Mozilla’s Emerging Technologies group. LPCNet combines signal processing and deep learning to improve the efficiency of neural speech synthesis. Our recent work turns LPCNet into a very low-bitrate neural speech codec that’s actually usable on current hardware and even on phones.
LPCNet: DSP-Boosted Neural Speech Synthesis
LPCNet is a new project out of Mozilla’s Emerging Technologies group — an efficient neural speech synthesiser with reduced complexity over some of its predecessors. Neural speech synthesis models have already demonstrated impressive speech synthesis quality, but their computational complexity has made them hard to use in real-time, especially on phones. Our solution with LPCNet uses a combination of deep learning and digital signal processing (DSP) techniques.
Introducing Opus 1.3
Opus is a totally open, royalty-free, audio codec that can be used for all audio applications, from music streaming and storage to high-quality video-conferencing and VoIP. This 1.3 release brings quality improvements to both speech and music compression, ambisonics support, and more.
RNNoise: Using Deep Learning for Noise Suppression
The Mozilla Research RRNoise project shows how to apply deep learning to noise suppression. It combines classic signal processing with deep learning, but it’s small and fast. And you can help! Find out how to donate your noise to science.
Opus audio codec version 1.2 released
The Opus audio codec just got another major upgrade with the release of version 1.2, bringing many speech and music quality improvements, especially at low bitrates.
On January 18th, France Telecom filed an IPR disclosure against Opus citing a single patent under non-royalty free terms. This raises a key question – what impact does this have on Opus? A close evaluation indicates that it has no impact on the Opus specification in any way. Summary: A careful reading of the FT […]
It's Opus, it rocks and now it's an audio codec standard!
In a great victory for open standards, the Internet Engineering Task Force (IETF) has just standardized Opus as RFC 6716. Opus is the first state of the art, free audio codec to be standardized. We think this will help us achieve wider adoption than prior royalty-free codecs like Speex and Vorbis. This spells the beginning […]