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Category: robotics/AI – Page 630

OpenAI unveils voice-cloning tool

OpenAI on Friday revealed a voice-cloning tool it plans to keep tightly controlled until safeguards are in place to thwart audio fakes meant to dupe listeners.

A model called “Voice Engine” can essentially duplicate someone’s speech based on a 15-second audio sample, according to an OpenAI blog post sharing results of a small-scale test of the tool.

“We recognize that generating speech that resembles people’s voices has serious risks, which are especially top of mind in an election year,” the San Francisco-based company said.

RLHF: Reinforcement Learning from Human Feedback

Despite being almost a year old, this blog by Chip Huyen is still a great read for getting into fine-tuning LLMs.

This article covers everything you need to know about Reinforcement Learning from Human Feedback (RLHF).

#AI #ReinforcementLearning

A narrative that is often glossed over in the demo frenzy is about the incredible technical creativity that went into making models like ChatGPT work. One such cool idea is RLHF: incorporating reinforcement learning and human feedback into NLP. This post discusses the three phases of training ChatGPT and where RLHF fits in. For each phase of ChatGPT development, I’ll discuss the goal for that phase, the intuition for why this phase is needed, and the corresponding mathematical formulation for those who want to see more technical detail.

Artificial Intelligence tool successfully predicts ventricular arrhythmia from standard heart tracings: Study

In a Leicester study that looked at whether artificial intelligence (AI) can be used to predict whether a person was at risk of a lethal heart rhythm, an AI tool correctly identified the condition 80 per cent of the time.

The findings of the study, led by Dr Joseph Barker working with Professor Andre Ng, Professor of Cardiac Electrophysiology and Head of Department of Cardiovascular Sciences at the University of Leicester and Consultant Cardiologist at the University Hospitals of Leicester NHS Trust, have been published in the European Heart Journal-Digital Health.

Ventricular arrhythmia (VA) is a heart rhythm disturbance originating from the bottom chambers (ventricles) where the heart beats so fast that blood pressure drops which can rapidly lead to loss of consciousness and sudden death if not treated immediately.

Swimming in the deep end of artificial intelligence

Artificial Intelligence — yada, yada, yada.

Sometimes the only way to learn how to swim is to be tossed into the deep end. And that is exactly what I have decided to do.

Herewith a very short elementary course. ChatGPT, OpenAI etc. are all based on LLM — large language models. They scraped a couple billion words and images and then using a magic Cuisinart, they mixed and matched until their platform software was able to know what you thought you were thinking before you thought it, or in the alternative gave you information in an elegant format that you could give to your professor while assuring him that you wrote or painted it yourself. Or not.

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