Method and apparatus for speech signal processing

An apparatus for speech signal processing, the apparatus comprising:

• a background noise frame obtaining unit implemented in a processor and adapted to obtain one or more background noise frames subsequent to an erasure concealment frame;
• an energy attenuation gain value setting unit adapted to set energy attenuation gain values for background noise signals corresponding to the background noise frames subsequent to the erasure concealment frame, to make differences between the energy attenuation gain values of the background noise signals corresponding to the background noise frames subsequent to the erasure concealment frame and the energy attenuation gain values of signals corresponding to their respective previous frames be within a threshold range;
• and
• a control unit adapted to control energy attenuation of the background noise signals corresponding to the background noise frames subsequent to the erasure concealment frame by using the energy attenuation gain values.

A method for speech signal processing,

• when one or more background noise frames subsequent to an erasure concealment frame are obtained, setting, by a processor an initial energy attenuation gain value for the background noise frames subsequent to the erasure concealment frame according to the energy attenuation gain value of the erasure concealment signal corresponding to the erasure concealment frame,
• setting a sum value of the initial energy attenuation gain value and an energy attenuation gain added value 1/256 to an energy attenuation gain value of a background noise signal corresponding to the first one of the background noise frames subsequent to the erasure concealment frame;
• and
• controlling energy attenuation of the background noise signals corresponding to the background noise frames subsequent to the erasure concealment frame by using the energy attenuation gain values.