Patent ID: 9154875
Filing Date: 2015-10-06
Classification: H04R

Abstract:
1. A device for processing an audio data stream having transient portions and non-transient portions, the device comprising: a transient detection unit configured and arranged to detect the transient portions of the audio input data stream and filter transient portions of the audio input data stream from inclusion in an audio output data stream, wherein the transient detection unit includes a low-pass filter and a high-pass filter, wherein the transient detection unit further includes a logic unit adapted to compare signals provided at an output of the low-pass filter and at an output of the high-pass filter; and wherein the transient detection unit is adapted to detect a transient portion of the audio data stream when the audio input data stream having passed the low-pass filter crosses the high-pass filter and a smoothing filter adapted to smooth the audio input data stream; and a harmonics generator configured and arranged to generate the audio output data stream based on the audio input data stream as filtered by the transient detection unit, the audio output data stream including a sequence of harmonics generated from the non-transient portions of the audio input data stream without contribution of the transient portions of the audio input data stream.