Patent ID: 8463603
Filing Date: 2013-06-11
Classification: G10L

Abstract:
1. A signal processing method, comprising: receiving, by an access device, an encoded energy attack signal in a frequency domain, wherein the encoded energy attack signal is encoded from an energy attack signal of an audio signal in a time domain by performing a transformation with a current transform window, and wherein the current transform window covers a significant energy portion of the energy attack signal; decoding, by the access device, the encoded energy attack signal into the time domain by performing an inverse-transformation; detecting an energy attack point of the decoded energy attack signal in the time domain; and replacing, by the access device, a signal segment with spectral pre-echoes in the decoded energy attack signal before the energy attack point with a corresponding signal segment without spectral pre-echoes retrieved from a signal history buffer, wherein the signal segment without spectral pre-echoes is covered by a previous transform window, and is decoded and stored in the signal history buffer.