US 12,432,520 B2
Colorless generation of elevation perceptual cues using all-pass filter networks
Joseph Anthony Mariglio, III, Encinitas, CA (US); and Zachary Seldess, San Diego, CA (US)
Assigned to Boomcloud 360 Inc., Encinitas, CA (US)
Filed by Boomcloud 360 Inc., Encinitas, CA (US)
Filed on Jul. 7, 2022, as Appl. No. 17/859,791.
Claims priority of provisional application 63/284,993, filed on Dec. 1, 2021.
Claims priority of provisional application 63/219,698, filed on Jul. 8, 2021.
Prior Publication US 2023/0022072 A1, Jan. 26, 2023
Int. Cl. H04S 7/00 (2006.01); G10L 19/008 (2013.01); G10L 19/16 (2013.01); G10L 19/26 (2013.01); G10L 21/028 (2013.01); H04R 3/04 (2006.01); H04S 1/00 (2006.01); H04S 3/00 (2006.01)
CPC H04S 7/307 (2013.01) [G10L 19/008 (2013.01); G10L 19/16 (2013.01); G10L 19/26 (2013.01); G10L 21/028 (2013.01); H04R 3/04 (2013.01); H04S 1/007 (2013.01); H04S 3/008 (2013.01); H04S 2400/01 (2013.01); H04S 2400/05 (2013.01); H04S 2400/13 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for encoding spatial cues along a sagittal plane into a monaural signal to generate a plurality of resulting channels, comprising, by a processing circuitry:
determining a target amplitude response for either mid- or side-components of the plurality of resulting channels based upon a spatial cue and corresponding to a coloration change in mid/side space, wherein the target amplitude response corresponds to a frequency-dependent phase shift that preserves coloration in left/right space;
converting the target amplitude response for either the mid or side components into a transfer function for a single-input, multi-output allpass filter; and
processing the monaural signal using the single-input, multi-output allpass filter, wherein the allpass filter is configured based upon the transfer function.