Title:
BAND EXPANDING DEVICE AND METHOD
Document Type and Number:
WIPO Patent Application WO/2008/015732
Kind Code:
A1
Abstract:
A band expanding device (1) is provided with a first generating means (111, 121)
for generating a base band signal (xB(n)) by up-sampling an input signal
(x(n)) and then making the up-sampled input signal pass through a low pass filter,
a second generating means (21) for generating a high frequency band signal (xH(n))
by squaring a band limited signal (xb(n)) that is a prescribed band
component signal out of the base band signal to obtain a signal (xb
2(n))
and by extracting a signal component of a high frequency band side of the squared
signal, and a third generating means (141) for generating an output signal (xE(n))
by adding the high frequency band signal to the base band signal.
Inventors:
KOMAMURA, Mitsuya (Sougou Kenkyusho. 1-1 Fujimi 6-chome, Tsurugashima-sh, Saitama 88, 3502288, JP)
Application Number:
JP2006/315165
Publication Date:
February 07, 2008
Filing Date:
July 31, 2006
Export Citation:
Assignee:
PIONEER CORPORATION (4-1 Meguro 1-chome, Meguro-ku Tokyo, 54, 1538654, JP)
パイオニア株式会社 (〒54 東京都目黒区目黒１丁目４番１号 Tokyo, 1538654, JP)
TECHEXPERTS INCORPORATION (15-5, Ohmorinishi 4-chome Ohta-k, Tokyo 15, 1430015, JP)
パイオニア株式会社 (〒54 東京都目黒区目黒１丁目４番１号 Tokyo, 1538654, JP)
TECHEXPERTS INCORPORATION (15-5, Ohmorinishi 4-chome Ohta-k, Tokyo 15, 1430015, JP)
International Classes:
G10L21/04; G10L19/02; G10L21/00; G10L19/00
Attorney, Agent or Firm:
EGAMI, Tatsuo et al. (3rd Floor Oak Building Kyobashi,16-10, Kyobashi 1-chom, Chuou-ku Tokyo, 104-0031, JP)