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US 2012/0072214 A1Published application
Frame Erasure Concealment Technique for a Bitstream-Based Feature Extractor
AssigneeAT&T Intellectual Property II, L.P.
InventorsRichard Vandervoort Cox, Hong Kook Kim
Life of this patent
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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.
Claims13
1-5. (canceled)
A method of frame erasure concealment, comprising:
- detecting a frame erasure;
- computing a probability of an observation sequence based on a decoding algorithm in response to detecting the frame erasure;
- and
- deleting an observation vector of the observation sequence, the observation vector associated with the frame erasure.
1 more element
A system of frame erasure concealment, comprising:
- means for detecting a frame erasure;
- means for computing a probability of an observation sequence based on a decoding algorithm in response to detecting a frame erasure;
- and
- means for deleting an observation vector of the observation sequence, the observation vector associated with the frame erasure.
1 more element
Dependencies are inferred from the claim text.