Method for reducing database requirements for speech recognition systems
AssigneeVoice Control Systems, Inc.
InventorThomas B. Schalk
Life of this patent
Estimating the term…
Abstract
The present invention comprises a method for reducing the database requirements necessary for use in speaker independent recognition systems. The method involves digital processing of a plurality of recorded utterances from a first database of digitally recorded spoken utterances. The previously recorded utterances are digitally processed to create a second database of modified utterances and then the first and second databases are combined to form an expanded database from which recognition vocabulary tables may be generated.
Claims12
A method for reducing database requirements for a speaker independent recognizer of a speech recognition system, comprising the steps of:
- selecting a plurality of utterances from a set of preexisting speech databases comprising the vocabulary of the speech recognition system;
- recording into a first database samples of the selected utterances from a predetermined number of sample users;
- processing each of the samples of the first database to create a plurality of modified samples of the selected utterances, the modified samples forming a second database, wherein the step of processing includes a step of filtering the samples to emphasize and de-emphasize high and low frequency information within the samples;
- and
- combining the first database and the second database to generate an expanded database for use in training the speaker independent recognizer.
A method for reducing training database sample requirements for speaker independent recognition systems, comprising the steps of:
- creating a training database of a plurality of digital samples, each digital sample representing a spoken utterance recorded from a sample user;
- digitally processing each of the plurality of digital samples to generate a plurality of modified digital samples wherein the step of digitally processing includes the step of filtering the digital samples to emphasize and de-emphasize high and low frequency information within the digital samples;
- and
- adding the plurality of modified digital samples to the training database to provide an expanded training database.
Dependencies are inferred from the claim text.