Patent ID: 7930173
Filing Date: 2011-04-19
Classification: G10L

Abstract:
1. A signal processing method for performing processing of an acoustic signal obtained by dequantizing a coded acoustic signal, comprising steps of: receiving coded acoustic signals; acquiring coefficients by dequantizing the received coded signals; detecting quantization bit rates of the acquired coefficients, respectively, at quantization time of the acquired coefficients; deciding whether each of the detected quantization bit rates is more than a predetermined value or not; outputting the coefficients whose detected quantization bit rates are respectively decided to be more than the predetermined value; picking up the coefficients whose detected quantization bit rates are respectively decided to be not more than the predetermined value; selecting a plurality of coefficients from the coefficients whose detected quantization bit rates are respectively decided to be more than the predetermined value; computing an interpolation coefficient for the picked up coefficients using the selected plurality of coefficients; interpolating the picked up coefficients by utilizing the computed interpolation coefficients to obtain corrected interpolation coefficients; transmitting the corrected interpolated coefficients; and carrying out the processing on the output coefficients and the transmitted corrected interpolation coefficients.