Dual-step sound pattern matching
First Claim
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1. A method for identifying an unknown sound having a registration mode and an identification mode, wherein, during the registration mode, said method comprising the steps of:
- forming a time-dependent first pattern from a sound inputted to be registered; and
storing said first pattern as a first reference pattern while adding a predetermined portion of said first pattern together to define a second reference pattern and storing said second reference pattern, whereby first and second reference patterns are stored for various sounds to be registered;
during the identification mode, said method comprising the steps of;
forming a time-dependent second pattern from an unknown sound inputted to be identified;
adding a predetermined portion of said second pattern together to define a comparison pattern;
comparing said comparison pattern with said stored second reference patterns, thereby selecting those second reference patterns which have at least a predetermined level of similarity with said comparison pattern; and
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Abstract
A sound or speech recognition system is made faster by first using data-reduced patterns to find candidates in preliminary testing, and then making a final decision by testing against full-data patterns. Specifically, a signal is transformed to a time-sequence of spectral vectors, which forms a full-data pattern. Then, a predetermined number of vectors representing the beginning or front-end of the signal are duplicated and summed to form a sum spectral vector which is used as the data-reduced pattern for preliminary testing.
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Citations
10 Claims
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1. A method for identifying an unknown sound having a registration mode and an identification mode, wherein, during the registration mode, said method comprising the steps of:
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forming a time-dependent first pattern from a sound inputted to be registered; and storing said first pattern as a first reference pattern while adding a predetermined portion of said first pattern together to define a second reference pattern and storing said second reference pattern, whereby first and second reference patterns are stored for various sounds to be registered;
during the identification mode, said method comprising the steps of;forming a time-dependent second pattern from an unknown sound inputted to be identified; adding a predetermined portion of said second pattern together to define a comparison pattern; comparing said comparison pattern with said stored second reference patterns, thereby selecting those second reference patterns which have at least a predetermined level of similarity with said comparison pattern; and - View Dependent Claims (3, 5)
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- 2. comparing said second pattern with those of said first reference patterns which correspond to the selected second reference patterns to determine which has the best similarity, thereby identifying the unknown sound.
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8. A method for identifying an unknown sound having a registration mode and an identification mode, wherein, during the registration mode, said method comprising the steps of:
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forming a time-dependent first pattern from a sound inputted to be registered; and storing said first pattern as a first reference pattern while adding a predetermined portion of said first pattern together to define a second reference pattern, classifying said second reference pattern into one of predetermined types, and storing the type of said second reference pattern, whereby first reference patterns and types thereof are stored for various sounds to be registered; during the identification mode, said method comprising the steps of; forming a time-dependent second pattern from an unknown sound inputted to be identified; adding a predetermined portion of said second pattern together to define a third pattern; classifying said third pattern into one of said predetermined types; and comparing said second pattern with those of said first reference patterns which have the same type as that of said third pattern to determine which has the best similarity, thereby identifying the unknown sound. - View Dependent Claims (10)
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Specification