• Skip to primary navigation
  • Skip to main content
SRI logo
  • About
    • Press room
    • Our history
  • Expertise
    • Advanced imaging systems
    • Artificial intelligence
    • Biomedical R&D services
    • Biomedical sciences
    • Computer vision
    • Cyber & formal methods
    • Education and learning
    • Innovation strategy and policy
    • National security
    • Ocean & space
    • Quantum
    • Robotics, sensors & devices
    • Speech & natural language
    • Video test & measurement
  • Ventures
  • NSIC
  • Careers
  • Contact
  • 日本支社
Search
Close
Speech & natural language publications November 1, 2005

Multirate ASR Models for Phone-Class Dependent N-Best List Rescoring

Citation

Copy to clipboard


Gadde, V. R., Sonmez, K., & Franco, H. (2005, November). Multirate ASR models for phone-class dependent N-best list rescoring. In IEEE Workshop on Automatic Speech Recognition and Understanding, 2005. (pp. 157-161). IEEE.

Abstract

Speech comprises a variety of acoustical phenomena occurring at differing rates. Fixed-rate ASR systems assume in effect a constant temporal rate of information flow via incorporating uniform statistics in proportion to a sound’s duration. The usual tradeoff window length of 25–30 milliseconds represents a time-frequency resolution compromise, which aims to allow reasonable speed for following changes in the spectral trajectories and sufficient number of samples to estimate the harmonic structure. In this work, we describe a technique to augment a recognizer that uses this compromise with information from multiple-rate spectral models that emphasize either better time or better frequency resolution in order to improve performance. The main idea is to use the hypotheses generated by a fixed-rate recognizer to determine the appropriate model rate for a segment of the speech waveform. This is realized through a technique based on rescoring of N-best lists with acoustical models using different temporal windows by a phone-dependent posterior-like score. We report results on the NIST Evaluation 2002 dataset, and demonstrate that the rescoring method produces word error rate (WER) improvements in a baseline system.

↓ Download

↓ View online

Share this

How can we help?

Once you hit send…

We’ll match your inquiry to the person who can best help you.

Expect a response within 48 hours.

Career call to action image

Make your own mark.

Search jobs

Our work

Case studies

Publications

Timeline of innovation

Areas of expertise

Institute

Leadership

Press room

Media inquiries

Compliance

Careers

Job listings

Contact

SRI Ventures

Our locations

Headquarters

333 Ravenswood Ave
Menlo Park, CA 94025 USA

+1 (650) 859-2000

Subscribe to our newsletter


日本支社
SRI International
  • Contact us
  • Privacy Policy
  • Cookies
  • DMCA
  • Copyright © 2023 SRI International
Manage Cookie Consent
To provide the best experiences, we use technologies like cookies to store and/or access device information. Consenting to these technologies will allow us to process data such as browsing behavior or unique IDs on this site. Not consenting or withdrawing consent, may adversely affect certain features and functions.
Functional Always active
The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
Preferences
The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user.
Statistics
The technical storage or access that is used exclusively for statistical purposes. The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.
Marketing
The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes.
Manage options Manage services Manage vendors Read more about these purposes
View preferences
{title} {title} {title}