PeopleofSuperintelligence

Researcher

Bishnu S. Atal

Also known as Bishnu Saroop Atal

Bishnu Atal was a speech-processing researcher in speech analysis, synthesis, recognition, and coding. Born in Kanpur, India, he earned degrees in India and the United States, taught acoustics at the Indian Institute of Science, and joined Bell Laboratories in 1961. He developed multipulse linear predictive coding and CELP for efficient speech transmission over telephone networks. At AT&T, he led the Shannon Laboratory, received the 2003 Benjamin Franklin Medal and the 2013 IEEE Kilby Signal Processing Medal, and served as an Affiliate Professor at the University of Washington. He died in 2026.

Works
161
Citations
9,947
h-index
36
Badges

Publication numbers from OpenAlex, as of 19 October 2026.

Timeline

  1. 1933–1968

    Education and IISc teaching

    He is born in Kanpur, India in 1933, earns a physics degree at the University of Lucknow in 1952, receives a diploma in electrical communication engineering from the Indian Institute of Science in 1955, and completes a PhD in electrical engineering at the Polytechnic Institute of Brooklyn in 1968. From 1957 to 1960, he teaches acoustics in IISc's Department of Electrical Communication Engineering.

  2. 1961–2002

    Speech research at Bell Labs

    He joins Bell Laboratories in 1961 and researches speech and acoustics there until retiring in 2002.

  3. 1997–2002

    Technology director at Shannon Lab

    He serves as Technology Director at the AT&T Shannon Laboratory in Florham Park, New Jersey, from 1997 to 2002.

  4. 2003

    Speech coding and a Franklin Medal

    His research spans speech analysis, synthesis, recognition, and coding. He develops multipulse linear predictive coding and CELP, which find widespread applications for efficient speech transmission over telephone networks. In 2003, the Franklin Institute awards him the Benjamin Franklin Medal in Electrical Engineering.

  5. 2003–2026

    Affiliate professor at UW

    Following his retirement from Bell Labs and AT&T Labs in 2003, he serves as an Affiliate Professor at the University of Washington.

  6. 2013–2018

    Medals and an Interspeech talk

    In 2013, he receives the IEEE Jack S. Kilby Signal Processing Medal. He receives the ISCA Medal for scientific achievement in 2018 for work in speech coding and analysis. At Interspeech 2018, he gives a main-conference talk as an ISCA medalist.

  7. 2026

    Death in 2026

    He dies in 2026 at age 93.

Career

  1. 2003–2026University of WashingtonAffiliate Professor
  2. 1997–2002AT&TTechnology Director
  3. 1961–2002Bell LabsResearcher
  4. 1957–1960Indian Institute of Science

Education

  1. 1968Polytechnic Institute of BrooklynPhD in electrical engineering
  2. 1955Indian Institute of ScienceDiploma in electrical communication engineering
  3. 1952University of LucknowPhysics degree

From the biography and OpenAlex affiliations (the years of papers that list the organization), so some years are approximate.

Most-cited works

  1. Speech Analysis and Synthesis by Linear Prediction of the Speech Wave1971 · The Journal of the Acoustical Society of America · 1,213 citations
  2. Code-excited linear prediction(CELP): High-quality speech at very low bit rates2005 · IEEE International Conference on Acoustics Speech and Signal Processing · 1,045 citations
  3. Effectiveness of linear prediction characteristics of the speech wave for automatic speaker identification and verification1974 · The Journal of the Acoustical Society of America · 916 citations
  4. Efficient vector quantization of LPC parameters at 24 bits/frame1993 · IEEE Transactions on Speech and Audio Processing · 591 citations
  5. A new model of LPC excitation for producing natural-sounding speech at low bit rates2005 · IEEE International Conference on Acoustics Speech and Signal Processing · 510 citations

From OpenAlex, as of 19 October 2026.

  1. Stanford University trained or employed 26 of the 108 AI major-prize winners, more than any other universityIncludes University of Washington. Stanford University trained or employed 26 of the 108 AI major-prize winners, more than any other university. We compare doctorate and employment links for major-prize and best-paper winners.
  2. Google has the highest combined h-index among AI organizationsIncludes University of Washington. Our estimates of combined and median h-index at AI organizations, using current affiliations and OpenAlex records.
  3. The company share of AI researchers’ top papers rose from 2% to 32%Includes University of Washington. We estimate where leading AI researchers worked when their most-cited papers appeared. The company share rose from 2% in 1975–1979 to 32% in 2020–2024.
  4. More people shaping AI studied at Massachusetts Institute of Technology than at any other institutionIncludes University of Washington. Our estimates of where the people shaping AI studied and where their careers led, from education records in cited biographies.

Colleagues

People with dated positions at the same organization in the same years.

Sources and credits

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  1. Oral-History:Bishnu Atal - Engineering and Technology History Wiki ethw.org. Checked 18 October 2026.
  2. Bishnu S. Atal | The Franklin Institute fi.edu. Checked 18 October 2026.
  3. 2000 Awardees njinvent.org. Checked 18 October 2026.
  4. Three EE Affiliate Professors Receive IEEE Landmark Awards! | UW Department of Electrical & Computer Engineering ece.uw.edu. Checked 18 October 2026.
  5. BISHNU.NET - Home bishnu.net. Checked 18 October 2026.
  6. stcnewsletter August 2003 signalprocessingsociety.org. Checked 18 October 2026.
  7. ISCA - Memorials wa.isca-speech.org. Checked 18 October 2026.
  8. SPS Members Receive 2013 IEEE Awards | IEEE Signal Processing Society Asset 8 signalprocessingsociety.org. Checked 18 October 2026.
  9. Interspeech 2018 Conference Review | IEEE Signal Processing Society Asset 8 signalprocessingsociety.org. Checked 18 October 2026.