| US 7,551,741 B2 | ||
| System and method for 3D sound processing | ||
| Qinglin Zhu, Santa Clara, Calif. (US) | ||
| Assigned to ESS Technology, Inc., Fremont, Calif. (US) | ||
| Filed on May 21, 2004, as Appl. No. 10/851,848. | ||
| Prior Publication US 2005/0259827 A1, Nov. 24, 2005 | ||
| Int. Cl. H04R 5/00 (2006.01) | ||
| U.S. Cl. 381—1 [381/17; 381/18; 381/19] | 31 Claims |
| 1. A method for a 3D sound generation, comprising:
filtering a left input using a first lattice filter;
filtering an output of the first lattice filter using a second lattice filter;
filtering a right input using a third lattice filter;
filtering an output of the third lattice filter using a fourth lattice filter;
attenuating the output of the first lattice filter and the output of the third lattice filter;
combining the output of the first lattice filter and an output of the second lattice filter;
subtracting from the combined output of the first lattice filter and the second lattice filter, a quantity of the attenuated
output of the third lattice filter combined with an output of the fourth lattice filter, thereby creating a left processed
output;
combining the output of the third lattice filter and the output of the fourth lattice filter;
subtracting from the combined output of the third lattice filter and the fourth lattice filter, a quantity of the attenuated
output of the first lattice filter combined with the output of the second lattice filter, thereby creating a right processed
output; and
generating the 3D sound using a left speaker for sounding the left processed output and a right speaker for sounding the right
processed output.
|