Patent ID: 8135593
Filing Date: 2012-03-13
Classification: G10L

Abstract:
1. A method for encoding a signal, the method comprising: performing a classification decision process on high frequency signals of input signals; adaptively encoding the high frequency signals according to a result of the classification decision process, wherein the classification decision process is used to determine a type of the high frequency signals, wherein the type of the high frequency signals comprises a transient signal or a non-transient signal; encoding low frequency signals of the input signals; and outputting an encoded bitstream of the low frequency signals, an adaptively encoded bitstream of the high frequency signals, and the result of the classification decision process wherein adaptively encoding the high frequency signals comprises: encoding four time envelopes and four spectral envelopes for a transient signal; and encoding eight spectral envelopes for a non-transient signal, wherein no time envelope is encoded for the non-transient signal.