Patent ID: 6249758
Filing Date: 2001-06-19
Classification: G10L

Abstract:
An audio signal encoding device comprising:an input for receiving a sub-frame of an audio signal;a voiced audio signal synthesis stage coupled to said input capable of producing a first synthetic audio signal approximating the sub-frame of an audio signal received at said input on a basis of a first set of parameters;an unvoiced audio signal synthesis stage coupled to said input capable of producing a second synthetic audio signal approximating the sub-frame of an audio signal received at said input on a basis of a second set of parameters;processing unit coupled to said signal synthesis stages for outputting a set of parameters allowing generation of a selected one of the first synthetic audio signal and the second synthetic audio signal, said processing unit comprising a switch having:a) a first input coupled to said voiced audio signal synthesis stage for receiving the first synthetic audio signal;b) a second input coupled to said unvoiced audio signal synthesis stage for receiving the second synthetic audio signal;c) an output for releasing either one of the first synthetic audio signal and the second synthetic audio signal.