公开(公告)号：JP2003169399A

公开(公告)日：2003-06-13

申请号：JP2001366148

申请日：2001-11-30

Applicant: ATR ADVANCED TELECOMM RES INST

Inventor： SHIMADA MASAHARU ,  HOKARI HARUHIDE ,  MAYAHARA TATSUHIRO ,  MIZUMACHI MITSUNORI ,  NAKAMURA SATORU

IPC: H04S1/00

Abstract: PROBLEM TO BE SOLVED: To provide a stereophonic sound image controller in which expansion/ shrinkage and rotation of sound image range can be operated by digital signal processing substantially in real time and deterioration of sound quality is substantially eliminated. SOLUTION: The stereophonic sound image controller comprises means for calculating the main value of the phase between 2 channel signals obtained by a time-frequency converting means, means for expanding/shrinking the sound image generating range based on the main value of the phase thus calculated and a preset expansion/shrinkage rate, means for moving a sound image based on the output from the sound image expanding/shrinking means and a preset rotational angle of movement, and a frequency-time converting means for converting the signal of each channel outputted from the sound image moving means into the signal of time axis. COPYRIGHT: (C)2003,JPO