Researcher

Hermann Ney

Hermann Ney develops statistical and machine learning approaches to speech recognition and machine translation. Ney used dynamic programming beam search for large-vocabulary speech recognition in 1990. The approach used a lexical prefix tree to construct the search space dynamically. His work included Kneser–Ney smoothing for language modelling in 1995. The method was a shared research contribution.

Works
1,452
Citations
47,651
h-index
93

Publication numbers from OpenAlex, as of 14 October 2026.

Photo of Hermann Ney

Timeline

  1. 1990

    Search for speech recognition

    Ney used dynamic programming beam search for large-vocabulary speech recognition in 1990. The approach used a lexical prefix tree to construct the search space dynamically.

  2. 1995

    Language model smoothing

    His work included Kneser–Ney smoothing for language modelling in 1995. The method was a shared research contribution.

  3. 1999

    Phrase-based translation

    Ney and his team worked on data-driven translation with bilingual word groups. He worked on this contribution in 1999, connecting it with the phrase-based approach to machine translation.

  4. 2001

    A word alignment toolkit

    His work included the GIZA++ toolkit, which became public in 2001. The shared toolkit trains statistical word alignments for machine translation and made this research infrastructure available to other teams.

  5. 2020

    Research recognition

    ACL elected Hermann Ney as a Fellow in 2020.

Sources and credits

Photo: Cairnlee, via Wikimedia Commons. License: CC BY-SA 4.0. Source: commons.wikimedia.org. Cropped to a square and resized. Ask us to remove or replace this photo.

  1. ISCA_Medal2020_Ney_BioCV_31Dec20.dvi (https://www-i6.informatik.rwth-aachen.de/web/Staff/ney/HomePage_Ney_BioCV2_31Dec20.pdf) www-i6.informatik.rwth-aachen.de. Checked 13 October 2026.
  2. ACL Fellows — 2020 — Hermann Ney aclweb.org. Checked 13 October 2026.