Patent Document ID: 8762143
Application ID: 11754814

Base Claim:
1. A method comprising: analyzing acoustic features of a received audio signal from a caller of a communication device; identifying, based on a previously recorded time and a previously recorded speed of the caller of the communication device, in combination with the acoustic features, a repeating pattern of meta-data associated with the acoustic features; 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; prompting the caller to perform one of: speaking more slowly, speaking more clearly, and moving to a quieter location based on the background environment classification; selecting an acoustic model matched to the background environment classification from a plurality of acoustic models, each of the plurality of acoustic models being generated for a particular predefined background environment classification; and performing speech recognition on the received audio signal using the acoustic model.

---

Claim 6:
6. 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.