Patent ID: 7133521
Filing Date: 2006-11-07
Classification: G10L,H04L,H04Q

Abstract:
1. An apparatus for feature processing of telecommunications signals, the apparatus being adapted to operate in a CELP domain without decoding to a speech signal domain the apparatus comprising: a dual-tone modulation frequency (DTMF) signal detection module, the dual-tone modulation frequency (DTMF) signal detection module being adapted to determine one or more DTMF tones based upon at least one or more mint CELP parameters, and the DTMF signal detection module being adapted to output the one or more DTMF signals if determined; a multi-input mixing module coupled to the DTMF signal detection module, the multi-input mixing module being adapted to process CELP parameters from more than one CELP-based codecs, representing respective more than one voice signals, into a single set of CELP parameters;