Patent Document ID: 9361881
Application ID: 14312116

Base Claim:
1. A method comprising: analyzing acoustic features of a received audio signal from a communication device; identifying a repeating pattern of meta-data associated with the acoustic features, wherein the repeating pattern of meta-data comprises a speed of a caller associated with the communication device; classifying a background environment of the caller based on the acoustic features and the repeating pattern of meta-data, to yield a background environment classification; selecting an acoustic model matched to the background environment classification from a plurality of acoustic models; and performing speech recognition on the received audio signal using the acoustic model.

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Claim 8:
8. The method of claim 1 , further comprising: classifying a first background environment in a call and thereafter classifying a second background environment; and transitioning from a first acoustic model associated with the first background environment to a second acoustic model associated with the second background environment by: starting the second acoustic model at an initial state similar to an ending state of the first acoustic model when the first acoustic model and the second acoustic model have similar structure; and applying a morphing algorithm to the transition from the first acoustic model to the second acoustic model if the first acoustic model and the second acoustic model have dissimilar structures.