Patent ID: 8554551
Filing Date: 2013-10-08
Classification: G10L

Abstract:
1. A method of processing a digital audio signal according to a state of a process control signal, the digital audio signal including a speech component and a context component, said method comprising: encoding frames of a part of the digital audio signal that lacks the speech component at a first bit rate when the process control signal has a first state; and when the process control signal has a second state different than the first state, (A) suppressing the context component from the digital audio signal to obtain a context-suppressed signal, (B) generating an audio context signal, (C) mixing a first signal that is based on the generated audio context signal with a second signal that is based on the context-suppressed signal to obtain a context-enhanced signal, (D) calculating a level of a third signal that is based on the context suppressed signal, wherein at least one among said generating and said mixing includes controlling, based on the calculated level of the third signal, a level of the first signal, and (E) encoding frames of a part of the context-enhanced signal that lacks the speech component at a second bit rate that is higher than the first bit rate.