Patent ID: 8244525
Filing Date: 2012-08-14
Classification: G10L

Abstract:
1. A method comprising: calculating, in an encoder, a first set of parameters associated with at least one frame of a received signal, wherein said first set of parameters comprises parameters based on energy levels of a plurality of frequency bands associated with the at least one frame; selecting, in a first stage, one of algebraic code excited linear prediction excitation, transform coding excitation or an uncertain mode based at least in part on predetermined conditions associated with the first set of parameters; calculating a second set of parameters associated with the at least one frame; selecting, in a second stage, one of algebraic code excited linear prediction excitation and transform coding excitation based at least in part on the second set of parameters and whether in the first stage the uncertain mode is selected; and encoding the frame using the selected one of algebraic code excited linear prediction excitation and the transform coding excitation from the second stage.