Patent ID: 9230555
Filing Date: 2016-01-05
CPC Classification: G10L

Claim Text:
1. An apparatus for generating an output audio data signal, the apparatus comprising: a receiving device for receiving an input encoded audio data signal comprising a plurality of encoding layers including a base layer and a plurality of enhancement layers; a reference unit for generating reference audio data from a reference set of layers of the plurality of encoding layers; a sampling device for generating sample audio data from a set of layers smaller than the reference set of layers; a comparison processor for comparing the sample audio data to the reference audio data, the comparison reflecting a difference between a first decoded signal corresponding to the sample audio data and a second decoded signal corresponding to the reference audio data; an output device for determining whether the comparison meets a criterion and if so, generating the output audio data signal to not include audio data from a first layer, the first layer being a layer of the reference set not included in the smaller set of layers; and otherwise, generating the output audio data signal to include audio data from the first wherein the comparison is based on a perceptual model, wherein the comparison processor is configured to: generate a first perceptual indication by applying the perceptual model to the reference audio data; and wherein the perceptual model is configured to: