Patent Document ID: 9111531
Application ID: 13722669

Base Claim:
1. A method comprising: receiving a portion of an audio signal at a first classifier in a digital audio device; classifying, by the digital audio device, the portion of the audio signal at the first classifier as speech or as music; and processing the portion of the audio signal, wherein processing the portion of the audio signal comprises: if the portion is classified by the first classifier as speech, then encoding, by the digital audio device, the speech using a first coding mode; or if the portion is classified by the first classifier as music, then: providing the portion to a second classifier in the digital audio device; classifying, by the digital audio device, the portion at the second classifier as speech or as music; and encoding the portion of the audio signal, wherein encoding the portion of the audio signal comprises: if the portion is classified at the second classifier as speech, then encoding, by the digital audio device, the portion using a second coding mode; or if the portion is classified at the second classifier as music, then encoding, by the digital audio device, the portion using a third coding mode.

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Claim 5:
5. The method of claim 1 , further comprising determining if the second classifier is enabled prior to providing the portion to the second classifier, and if the second classifier is not enabled, then encoding the portion with the third coding mode.