ENCODING AND DECODING APPARATUS FOR LINEAR PREDICTIVE CODER RESIDUAL SIGNAL OF MODIFIED DISCRETE COSINE TRANSFORM BASED UNIFIED SPEECH AND AUDIO CODING

摘要

Disclosed is an encoding and decoding apparatus for the LPC residual signal of MDCT based unified speech and audio coding. The encoding apparatus for the LPC residual signal analyzes the property of an input signal, selects the encoding method of an LPC filtered signal, and encodes the LPC residual signal based on one among real filterbank, complex filterbank, algebraic code excited linear prediction (ACELP). So, the performance of encoding can be improved.