Frame erasure concealment technique for a bitstream-based feature extractor
First Claim
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1. A method, comprising:
- measuring a Euclidean distance between line spectrum pairs of adjacent frames representative of speech signals, wherein the Euclidian distance is given by
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Abstract
A frame erasure concealment technique for a bitstream-based feature extractor in a speech recognition system particularly suited for use in a wireless communication system operates to “delete” each frame in which an erasure is declared. The deletions thus reduce the length of the observation sequence, but have been found to provide for sufficient speech recognition based on both single word and “string” tests of the deletion technique.
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16 Claims
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1. A method, comprising:
measuring a Euclidean distance between line spectrum pairs of adjacent frames representative of speech signals, wherein the Euclidian distance is given by - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method, comprising:
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computing a probability of an observation sequence based on a decoding algorithm in response to detecting a frame erasure; and deleting an observation vector of the observation sequence, the observation vector associated with the frame erasure, wherein the means for deleting the observation vector of the observation sequence comprises; measuring a Euclidean distance between line spectrum pairs of contiguous frames, wherein the Euclidian distance is given by - View Dependent Claims (8, 9, 10, 11)
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12. A method, comprising:
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computing a probability of an observation sequence based on a decoding algorithm in response to detecting a frame erasure; and measuring a Euclidean distance between line spectrum pairs of adjacent frames representative of speech signals, wherein the Euclidian distance is given by - View Dependent Claims (13, 14, 15, 16)
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Specification