Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
185 words
A speech recognition system of the type comprising means for storing reference patterns derived from speech in a form useful for comparison with a like form derived from speech to be recognized, means for deriving from the speech to be recognized patterns in the like form with regard to the reference patterns, and means for processing the respective patterns to generate probable matches of the patterns, and means for indicating recognized words for utilization, said system BEING CHARACTERIZED IN THAT the storing means includes means for storing in an associated form sets of patterns having both data from a single time frame of the detected speech and transitional data spanning a plurality of neighboring time frames including the current frame, the deriving means comprises means for deriving, in an associated form, sets of patterns having both data from a single time frame of the detected speech, and transitional data spanning a plurality of neighboring time frames including the single time frame, and the processing means includes means for giving equivalent weight to both single time frame data and transitional data in obtaining probable recognized words.
Claim 2
Dependent Claim
185 words
A speech recognition system of the type comprising means for storing reference patterns derived from speech in a form useful for comparison with a like form derived from speech to be recognized, means for deriving from the speech to be recognized patterns in the like form with regard to the reference patterns, and means for processing the respective patterns to generate probable matches of the patterns, and means for indicating recognized words for utilization, said system BEING CHARACTERIZED IN THAT the storing means includes means for storing in an associated form sets of patterns having both data from a single time frame of the detected speech and transitional data spanning a plurality of neighboring time frames including the current frame, the deriving means comprises means for deriving, in an associated form, sets of patterns having both data from a single time frame of the detected speech, and transitional data spanning a plurality of neighboring time frames including the single time frame, and the processing means includes means for giving equivalent weight to both single time frame data and transitional data in obtaining probable recognized words.
Claim 3
Dependent Claim
66 words
A speech recognition system of the type claimed in claim 1, said system BEING FURTHER CHARACTERIZED IN THAT the storing means includes means for storing, and the deriving means includes means for deriving, sets of patterns including as the transitional data respective time-derivative data centered on the respective single frames, wherein the time-derivative data depends in part on data from one or more neighboring time frames.
Claim 4
Dependent Claim
136 words
A speech recognition system of the type claimed in claim 1, said system BEING FURTHER CHARACTERIZED IN THAT the means for storing the reference patterns comprises means for deriving spectral features by Linear Prediction Coefficient methods the single-time-frame data comprising cepstral information and the transitional data comprising time-derivative cepstral information characterizing the neighborhood of related single-time-frame data, the means for deriving patterns from the speech to be recognized comprises means for deriving spectral features by Linear Prediction Coefficient (LPC) methods, the single-time-frame data comprising cepstral information, and the transitional data comprising time-derivative cepstral information characterizing the neighborhood of the related single-time-frame data, and the means for processing the respective patterns includes means for applying the single-time-frame cepstral information and the time-derivative cepstral information equally effectively, to improve the likelihood of accuracy in recognizing words for utilization.
Claim 5
Dependent Claim
89 words
A speech recognition system of the type claimed in claim 3, said system BEING FURTHER CHARACTERIZED IN THAT the means for storing reference patterns comprises means for storing such patterns derived by a segmental training procedure from samples of connected-word speech, the means for deriving patterns from the speech to be recognized is adapted to act upon connected-word speech, and and the means for processing the respective patterns is adapted to apply both the cepstral information and the time-derivative cepstral information effectively in each level of a level-building process.