Electrical audio signal processing systems and devices – Binaural and stereophonic – Pseudo stereophonic
Reexamination Certificate
2011-03-22
2011-03-22
Chin, Vivian (Department: 2614)
Electrical audio signal processing systems and devices
Binaural and stereophonic
Pseudo stereophonic
C367S135000
Reexamination Certificate
active
07912225
ABSTRACT:
3D sound is generated using an improved HRTF modeling technique for synthesizing HRTFs with varying degrees of smoothness and generalization. A plurality N of spatial characteristic function sets are regularized or smoothed before combination with corresponding Eigen filter functions, and summed to provide an HRTF (or HRIR) filter having improved smoothness in a continuous auditory space. A trade-off is allowed between accuracy in localization and smoothness by controlling the smoothness level of the regularizing models with a lambda factor. Improved smoothness in the HRTF filter allows the perception by the listener of a smoothly moving sound rendering free of annoying discontinuities creating clicks in the 3D sound.
REFERENCES:
patent: 5500900 (1996-03-01), Chen et al.
patent: 5659619 (1997-08-01), Abel
patent: 7085393 (2006-08-01), Chen
patent: 7231054 (2007-06-01), Jot et al.
patent: 0448890 (1991-10-01), None
patent: 62-145297 (1987-06-01), None
patent: 1240032 (1989-09-01), None
V. Ralph Algazi, et al., “Elevation localization and head-related transfer function analysis at low frequencies”, J. Acoust. Soc. Am., 109(3), Mar. 2001, p. 1110-1122.
Corey I. Cheng, “Visualization, Measurement, and Interpolation of head-related transfer functions (HRTF's) with Applications in Electro-Acoustic Music”, dissertation, The University of Michigan, Aug. 2001, pp. 1-205.
Jiashu Chen, et al., “A Spatial Feature Extraction and Regularization Model for the Head-Related Transfer Function,” Journal of Acoustical Society of America, Jan. 1995, pp. 439-452.
Jiashu Chen, et al., “External Ear Transfer Function Modeling: A Beamforming Approach,” Journal of Acoustical Society of America, Oct. 1992, pp. 1933-1944.
Richard A. Reale, et al., “Am Implementation of Virtual Acoustic Space for Neurophysiological Studies of Directional Hearing,” Virtual Auditory Space: Generation and Applications, Chapter 5, 1996, pp. 153-183.
Tomaso Poggio et al., “From Regularization to Radial, Tensor and Additive Splines,” Neural Networks for Signal Processing, 1993, pp. 223-227.
Agere Systems Inc.
Chin Vivian
Mendelsohn Steve
Mendelsohn, Drucker & Associates P.C.
Zhang Leshui
LandOfFree
Generating 3D audio using a regularized HRTF/HRIR filter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Generating 3D audio using a regularized HRTF/HRIR filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Generating 3D audio using a regularized HRTF/HRIR filter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2711967