Patent ID: 7596492
Filing Date: 2009-09-29
Classification: G10L

Abstract:
1. An apparatus for concealing a highband error in a spilt-band wideband voice codec, the apparatus comprising: a lowband LPC coefficient extracting means for extracting a lowband linear predictive coding (LPC) coefficient from a lowband voice signal passed by a lowband decoding means; a highband excitation signal generating means for generating a highband excitation signal based on the lowband voice signal and the lowband LPC coefficient; a highband LPC coefficient generating means for generating a highband LPC coefficient based on the lowband LPC coefficient; a highband voice synthesizing means for synthesizing a highband voice signal based on the highband excitation signal and the highband LPC coefficient; and a high pass filtering means for removing a lowband component of the synthesized highband voice signal by the highband voice synthesizing means and generating the synthesized highband voice signal.