公开(公告)号：EP3166107A4

公开(公告)日：2018-01-03

申请号：EP15814179

申请日：2015-06-22

Applicant: CLARION CO LTD

Inventor： HASHIMOTO TAKESHI ,  WATANABE TETSUO ,  FUJITA YASUHIRO ,  FUKUE KAZUTOMO ,  KUMAGAI TAKATOMI

IPC: G10L21/0388 ,  G10L21/0232

CPC classification number: G10L21/0332 ,  G10L21/0232 ,  G10L21/0388

Abstract: There is provided a signal processing device, comprising: a frequency detecting means that detects a frequency satisfying a predetermined condition from an audio signal; an offset means that gives an offset to the detected frequency by the frequency detecting means in accordance with a frequency property at the detected frequency or around the detected frequency; a reference signal generating means that generates a reference signal by extracting a signal from the audio signal based on the detected frequency offset by the offset means; an interpolation signal generating means that generates an interpolation signal based on the generated reference signal; and a signal synthesizing means that performs high band interpolation by synthesizing the generated interpolation signal and the audio signal.