Patent ID: 9021318
Filing Date: 2015-04-28
Classification: G10L,H04L

Abstract:
1. A voice processing apparatus in an ADPCM (Adaptive Differential Pulse Code Modulation) voice transmission system in which voice data that is differentially quantized through an ADPCM scheme is transmitted, the voice processing apparatus comprising: an error detector which detects whether or not an error occurs in a transmission frame containing voice data that indicates a differential value; an error determiner which determines a level of the error detected by the error detector when the error detector detects the error; a voice processor which corrects the voice data with a correction value depending on the level of the error detected by the error detector; and an ADPCM decoder which decodes the voice data corrected by the voice processor, wherein the voice processor defines a correction interval value for determining a time interval for correction, and changes the correction interval value according to the level of the error, and the voice processor corrects the voice data with a longer time interval by setting the correction interval value to a larger value as the level of the error is lower, and corrects the voice data with a shorter time interval by setting the correction interval value to a smaller value as the level of the error is higher.