Ayaan Sharif's picture

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Ayaan Sharif

Ayaan-Sharif

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https://shariif.tech

AI & ML interests

NLP, LLM, TEXT, Languages

Recent Activity

replied to sanchit-gandhi's post 4 days ago

Why does returning timestamps help Whisper reduce hallucinations? 🧐 Empirically, most practitioners have found that setting `return_timestamps=True` helps reduce hallucinations, particularly when doing long-form evaluation with Transformers’ “chunked” algorithm. But why does this work?.. My interpretation is that forcing the model to predict timestamps is contradictory to hallucinations. Suppose you have the transcription: ```markdown The cat sat on the on the on the mat. ``` Where we have a repeated hallucination for “on the”. If we ask the model to predict timestamps, then the “on the” has to contribute to the overall segment-level timing, e.g.: ```markdown <|0.00|> The cat sat on the on the on the mat.<|5.02|> ``` However, it’s impossible to fit 3 copies of “on the” within the time allocation given to the segment, so the probability for this hallucinatory sequence becomes lower, and the model actually predicts the correct transcription with highest probability: ```markdown <|0.00|> The cat sat on the mat.<|5.02|> ``` In this sense, the end timestamp is of the opposite of the initial timestamp constraint they describe in Section 4.5 of the paper https://huggingface.co/papers/2212.04356 → it helps the model remove extra words at the end of the sequence (rather than the initial timestamp which helps when the model ignores words at the start), but the overall principle is the same (using timestamps to improve the probability of more realistic sequences). Leaving it open to you: why do you think timestamps reduces Whisper hallucinations?

liked a Space 5 days ago

R1ckShi/FunClip

liked a Space 5 days ago

sanchit-gandhi/whisper-jax

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upvoted a collection 13 days ago

IndicConformer

A collection of ASR models for 22 scheduled languages of India • 22 items • Updated Oct 15, 2024 • 5

upvoted an article 8 months ago

Article

Introducing the Open Arabic LLM Leaderboard

May 14, 2024

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