Patent ID: 11935546
Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. An audio communication device that comprises:
a difference element configured to produce a sequence of prediction error values by subtracting a sequence of predicted audio sample values from a sequence of audio samples;
a scaling element configured to produce a sequence of scaled error values by dividing each prediction error value by a corresponding envelope estimate;
a quantizer configured to operate on the sequence of scaled error values to produce a sequence of quantized error values;
a multiplier configured to use the corresponding envelope estimates to produce a sequence of reconstructed error values;
a predictor configured to produce the sequence of predicted audio sample values based on reconstructed audio samples derived from the sequence of reconstructed error values; and
an envelope estimator including:
an updater configured to apply a dynamic gain to the reconstructed error values to produce a sequence of update values; and
an integrator configured to combine each of the update values with the corresponding envelope estimate to produce a subsequent envelope estimate,

wherein the dynamic gain decreases from a maximum gain value to a minimum gain value as the corresponding envelope estimate increases.