Method and apparatus to reproduce expanded sound using mono...

Electrical audio signal processing systems and devices – Sound effects – Reverberators

Reexamination Certificate

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C381S074000

Reexamination Certificate

active

07853023

ABSTRACT:
A method and apparatus to reproduce sound using a mono speaker, and a stereo sound system employing the same. The sound reproducing method can include: adding a first channel signal and a second channel signal of an input stereo signal or an input mono signal; sound field filtering by adding a sound field effect to the added signals; convolving the signal of the first channel with a first HRTF in a first convolution process; convolving the signal of the second channel with a second HRTF in a second convolution process; and adding the signal output from the sound field filtering and the signals output from the first and second convolution processes to produce an output signal.

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International Search Report dated Feb. 21, 2007 issued in PCT International Application PCT/KR2006/005029.
European Search Report issued Mar. 4, 2009 in EP Application No. 06823737.9
Korean Office Action dated Sep. 29, 2006 issued in KR 2005-115847.

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