Techniques for localized perceptual audio
Audio perception in local proximity to visual cues is provided. A device includes a video display, first row of audio transducers, and second row of audio transducers. The first and second rows can be vertically disposed above and below the video display. An audio transducer of the first row and an audio transducer of the second row form a column to produce, in concert, an audible signal. The perceived emanation of the audible signal is from a plane of the video display (e.g., a location of a visual cue) by weighing outputs of the audio transducers of the column. In certain embodiments, the audio transducers are spaced farther apart at a periphery for increased fidelity in a center portion of the plane and less fidelity at the periphery.
1. A method for audio reproduction, the method comprising:
selecting audio transducers of a first column to correspond to a first visual cue position according to column snapping;
selecting audio transducers of a second column to correspond to a second visual cue position according to column snapping, wherein the audio transducers of the first and second columns are arranged in a first row and a second row, and wherein at least one of the selected audio transducers of the first column differs from the selected audio transducers of the second column;
calculating first weight factors based on the selected audio transducers of the first column and the first visual cue position, wherein the first weight factors correspond to a vertical position of a perceptual origin for the first visual cue position;
calculating second weight factors based on the selected audio transducers of the second column and the second visual cue position, wherein the second weight factors correspond to a vertical position of a perceptual origin for the second visual cue position;
producing a first audible signal using the first weight factors applied to the selected audio transducers of the first column, the first audible signal being weighted between the selected audio transducers of the first column to correspond to the first visual cue position; and
producing a second audible signal during simultaneous reproduction of the first audible signal by the first column using the second weight factors applied to the selected audio transducers of the second column, the second audible signal being weighted between the selected audio transducers of the second column to correspond to the second visual cue position,
wherein a first listener position has substantially equal first path lengths to the selected audio transducers of the first column, and wherein a second listener position has substantially equal second path lengths to the selected audio transducers of the first column.
2. The method of claim 1 wherein the first visual cue position is disposed away from a screen according to a three dimensional visual cue, and wherein the first audible signal is perceived at an adjusted coordinate computed from a three dimensional depth map.
3. The method of claim 1 wherein both the first and second visual cue positions are disposed away from a screen according to a three dimensional visual cue, wherein the first audible signal is perceived at a first adjusted coordinate computed from a three dimensional depth map, and wherein the second audible signal is perceived at a second adjusted coordinate computed from the three dimensional depth map.
4. The method of claim 1 wherein the audio transducers of the first row are uniformly spaced apart.
5. The method of claim 1 wherein two adjacent audio transducers of the first row are spaced less than 10 inches apart.
6. The method of claim 1 wherein distances between adjacent audio transducers of the first row vary.
7. The method of claim 1 wherein the first row comprises audio transducers of differing size.
8. The method of claim 1 wherein the first row comprises audio transducers having differing frequency range performance.
9. The method of claim 1 , wherein each of the selected audio transducers of the first column differs from the audio transducers of the second column.
10. The method of claim 1 , wherein the first audible signal is produced only by the selected audio transducers of the first column, and the second audible signal is produced only by the selected audio transducers of the second column.
11. A video display apparatus, the apparatus comprising:
a video display;
audio transducers arranged in a first row above the video display and a second row below the video display; and
a processor,
wherein the processor is configured to select, from the audio transducers in the first row and the audio transducers in the second row, audio transducers of a first column to correspond to a first visual cue position according to column snapping,
wherein the processor is configured to select, from the audio transducers in the first row and the audio transducers in the second row, audio transducers of a second column to correspond to a second visual cue position according to column snapping, wherein at least one of the selected audio transducers of the first column differs from the selected audio transducers of the second column,
wherein the processor is configured to calculate first weight factors based on the selected audio transducers of the first column and the first visual cue position, wherein the first weight factors correspond to a vertical position of a perceptual origin for the first visual cue position,
wherein the processor is configured to calculate second weight factors based on the selected audio transducers of the second column and the second visual cue position, wherein the second weight factors correspond to a vertical position of a perceptual origin for the second visual cue position;
wherein the selected audio transducers of the first column produce a first audible signal using the first weight factors applied to the selected audio transducers of the first column, the first audible signal being weighted between the audio transducers of the first column to correspond to the first visual cue position,
wherein the selected audio transducers of the second column produce, during simultaneous reproduction of the first audible signal by the first column using the second weight factors applied to the selected audio transducers of the second column, a second audible signal, the second audible signal being weighted between the audio transducers of the second column to correspond to the second visual cue position, and
wherein a first listener position has substantially equal first path lengths to the selected audio transducers of the first column, and wherein a second listener position has substantially equal second path lengths to the selected audio transducers of the first column.
12. The video display apparatus of claim 11 , wherein the first visual cue position is disposed away from a screen according to a three dimensional visual cue, and wherein the first audible signal is perceived at an adjusted coordinate computed from a three dimensional depth map.
13. The video display apparatus of claim 11 , wherein both the first and second visual cue positions are disposed away from a screen according to a three dimensional visual cue, wherein the first audible signal is perceived at a first adjusted coordinate computed from a three dimensional depth map, and wherein the second audible signal is perceived at a second adjusted coordinate computed from the three dimensional depth map.
14. The video display apparatus of claim 11 , wherein the audio transducers of the first row are uniformly spaced apart.
15. The video display apparatus of claim 11 , wherein two adjacent audio transducers of the first row are spaced less than 10 inches apart.
16. The video display apparatus of claim 11 , wherein distances between adjacent audio transducers of the first row vary.
17. The video display apparatus of claim 11 , wherein the first row comprises audio transducers of differing size.
18. The video display apparatus of claim 11 , wherein the first row comprises audio transducers having differing frequency range performance.
19. The video display apparatus of claim 11 , wherein each of the selected audio transducers of the first column differs from the audio transducers of the second column.
20. The video display apparatus of claim 11 , wherein the first audible signal is produced only by the selected audio transducers of the first column, and the second audible signal is produced only by the selected audio transducers of the second column.