公开(公告)号：AU2002343212B2

公开(公告)日：2006-03-09

申请号：AU2002343212

申请日：2002-10-29

Applicant: PANASONIC IP CORP AMERICA

Inventor： SAWADA YOSHIAKI ,  ISHIKAWA TOMOKAZU ,  MIYASAKA SHUJI

IPC: G10L19/02 ,  G10L19/18 ,  G10L19/24

Abstract: A decoding device (30a) comprises a narrow-band decoding unit (31) operable to reproduce a PCM signal (P1) from a narrow-band bit stream included in a wide-band bit stream (S0), a wide-band decoding unit (32) operable to reproduce a PCM signal (P2) having a frequency band which is wider than that of the PCM signal (P1) reproduced by the narrow-band decoding unit (31) from the narrow-band bit stream and a band expanding bit stream included in the wide band bit stream (S0) and a selecting unit (34) operable to select either the PCM signal (P1) reproduced by the narrow-band decoding unit (31) or the PCM signal (P2) reproduced by the wide-band decoding unit (32), and to output the selected sound digital signal.