Patent · US Expired

Unified clustering tree

US7389229B2 · kind B2 · utility

3Cited by

92References

14Claims

0Family size

Assignee

BBN Technologies Corporation · US

Inventors

Jayadev Billa · Evanston, US
Daniel Kiecza · Cambridge, US
Francis G. Kubala · Boston, US

Key dates

Filing date	Oct 16, 2003
Grant date	Jun 17, 2008
Priority date	—
Expiry date	Jan 29, 2026

Classification

Technology area (CPC G)Physics
CPC primaryG10L15/32
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A unified clustering tree (500) generates phoneme clusters based on an input sequence of phonemes. The number of possible clusters is significantly less than the number of possible combinations of input phonemes. Nodes (510, 511) in the unified clustering tree are arranged into levels such that the clustering tree generates clusters for multiple speech recognition models. Models that correspond to higher levels in the unified clustering tree are coarse models relative to more fine-grain models at lower levels of the clustering tree.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.