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US 10,872,615 B1Granted
ASR-enhanced speech compression/archiving
AssigneeMedallia, Inc.
InventorDavid Garrod
Life of this patent
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Abstract
A process for compressing an audio speech signal utilizes ASR processing to generate a corresponding text representation and, depending on confidence in the corresponding text representation, selectively applies more, less, or no compression to the audio signal. The result is a compressed audio signal, with corresponding text, that is compact and well suited for searching, analytics, or additional ASR processing.
Claims18
A computer-implemented process for digitally compressing an audio signal that includes human speech utterances, the process comprising at least the following computer-implemented acts:
- (1) receiving a digitally encoded audio signal that includes human speech utterances;
- (2) identifying portions of the digitally encoded audio signal that correspond to the speech utterances;
- (3) performing automatic speech recognition (ASR) processing to produce, for each utterance, a corresponding (i) original audio representation, (ii) text representation, and (iii) ASR confidence that represents a likelihood that the text representation accurately captures all spoken words contained in the corresponding audio representation;
- (4) forming a compressed audio signal by concatenating the utterances and, for each utterance, only including either its original audio representation or a compressed version of its original audio representation;
- (5) storing the compressed audio signal in a non-transitory, computer-readable medium;
- and
- (6) wherein, for each utterance, determining whether to include its original audio representation or a compressed version of its original audio representation in the compressed audio signal comprises determining whether the utterance's corresponding ASR confidence exceeds a predetermined threshold value.
4 more elements
Dependencies are inferred from the claim text.