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Home » Archives for Horacio Franco » Page 5
Horacio Franco

Horacio Franco

Chief Scientist, Speech Technology and Research Laboratory
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Publications

Speech & natural language publications September 1, 2001

Improved Maximum Mutual Information Estimation Training of Continuous Density HMMs

Horacio Franco

We derive a new set of equations for MMIE based on a quasi-Newton algorithm, without relying on EBW. We find that by adopting a generalized form of the MMIE criterion, the H-criterion, convergence speed and recognition performance can be improved

Speech & natural language publications October 1, 2000

Prosodic Features for Automatic Text-Independent Evaluation of Degree of Nativeness for Language Learner

Horacio Franco, Kristin Precoda

Predicting the degree of nativeness of a student’s utterance is an important issue in computer-aided language learning.

Information & computer science publications October 1, 2000

Consonant Discrimination in Elicited and Spontaneous Speech: A Case for Signal-Adaptive Front Ends in ASR

Horacio Franco

This work investigates an approach to add back such transient information to a speech recognizer, without losing the robustness of the standard acoustic models. We demonstrate a set of phonetically-motivated acoustic features that discriminate a preliminary test set of highly ambiguous voiceless stops in CV contexts.

Speech & natural language publications August 1, 2000

Effects of Speech Recognition-based Pronunciation Feedback on Second-Language Pronunciation Ability

Kristin Precoda, Horacio Franco

This study’s goal was to determine whether receiving a particular type of feedback on nativeness of second-language accent positively influenced pronunciation over time.

Speech & natural language publications August 1, 2000

The SRI EduSpeak(TM) System: Recognition and Pronunciation Scoring for Language Learning

Horacio Franco, Harry Bratt, Kristin Precoda, Victor Abrash

The EduSpeak(TM) system is a software development toolkit that enables developers of interactive language education software to use state-of-the-art speech recognition and pronunciation scoring technology.

Speech & natural language publications May 1, 2000

The SRI March 2000 Hub-5 Conversational Speech Transcription System

Harry Bratt, Horacio Franco, Colleen Richey

We describe SRI’s large vocabulary conversational speech recognition system as used in the March 2000 NIST Hub-5E evaluation.

Information & computer science publications January 1, 2000

Rate-dependent Acoustic Modeling for Large Vocabulary Conversational Speech Recognition

Horacio Franco

In this paper, we evaluate our approach on a large-vocabulary conversational speech recognition (LVCSR) task over the telephone, with several minimal pair comparisons based on different baseline systems.

Speech & natural language publications August 1, 1998

Collection and Detailed Transcription of a Speech Database for Development of Language Learning Technologies

Harry Bratt, Horacio Franco

We describe the methodologies for collecting and annotating a Latin-American Spanish speech database. We use the annotated database to investigate rater reliability, the effect of each phone on overall perceived nonnativeness, and the frequency of specific pronunciation errors.

Education & learning publications September 1, 1997

Automatic Pronunciation Scoring of Specific Phone Segments for Language Instruction

Horacio Franco

The aim of the work described in this paper is to develop methods for automatically assessing the pronunciation quality of specific phone segments uttered by students learning a foreign language.

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