Audio signal recognition computer
First Claim
1. A signal pattern encoder including a transducer, a signal processing assembly coupled to the output of said transducer for providing spectrum samples representative of the signal output of said transducer and a timing and control assembly connected to said signal processing assembly wherein the improvement comprises:
- event encoding logic means coupled to the output of said signal processing assembly and also coupled to said timing and control assembly for computing the difference between a current spectrum sample and the last previous spectrum sample accepted by said event encoding logic means;
first means responsive to said event encoding logic means for rejecting said current spectrum sample if said difference is below a predetermined value;
second means responsive to said event encoding logic means for encoding said current spectrum sample into a binary signal if said difference is above said predetermined value;
circularly addressed data buffer means connected to said encoding means for continuously storing said encoded spectrum samples within said circularly addressed data buffer means;
an event detector connected to said circularly addressed data buffer means and responsive to said event encoding logic means for determining the boundaries of a particular event, and for storing the addresses within said circularly addressed data buffer means of said boundaries; and
third means connected to said circularly addressed data buffer means and responsive to said event detector for reading data relating to said particular even from said circularly addressed data buffer means.
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Accused Products
Abstract
A signal encoder and classifier particularly adapted to speech recognition includes a circularly addressed buffer which is independently addressed by a new data writing address system and a buffered data reading system so that writing and reading of data may be accomplished on a time shared basis. This time shared operation permits serial writing and reading of the pattern data without interrupting income signal storage. The writing data address system addresses the data into the buffer in a circular fashion while the reading data address system utilizes stored addresses identifying the beginning and end of the signal patterns for addressing sequential patterns from the buffer.
15 Citations
9 Claims
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1. A signal pattern encoder including a transducer, a signal processing assembly coupled to the output of said transducer for providing spectrum samples representative of the signal output of said transducer and a timing and control assembly connected to said signal processing assembly wherein the improvement comprises:
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event encoding logic means coupled to the output of said signal processing assembly and also coupled to said timing and control assembly for computing the difference between a current spectrum sample and the last previous spectrum sample accepted by said event encoding logic means; first means responsive to said event encoding logic means for rejecting said current spectrum sample if said difference is below a predetermined value; second means responsive to said event encoding logic means for encoding said current spectrum sample into a binary signal if said difference is above said predetermined value; circularly addressed data buffer means connected to said encoding means for continuously storing said encoded spectrum samples within said circularly addressed data buffer means; an event detector connected to said circularly addressed data buffer means and responsive to said event encoding logic means for determining the boundaries of a particular event, and for storing the addresses within said circularly addressed data buffer means of said boundaries; and third means connected to said circularly addressed data buffer means and responsive to said event detector for reading data relating to said particular even from said circularly addressed data buffer means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification