1. The method of multi-channel surround sound simulation comprising the steps of:
selectively reverberating a front left channel and a front right channel;
forming a head related transfer function of a front center channel;
selectively reverberating a surround left channel and a surround right channel;
summing the selectively reverberated front left channel with the selectively reverberated surround left channel thereby forming a first left sum;
summing the first left sum and the head related transfer function of the front center channel thereby forming a second left sum;
summing the selectively reverberated front right channel with the selectively reverberated surround right channel thereby forming a first right sum;
summing the first right sum and the head related transfer function of the front center channel thereby forming a second right sum; and
canceling cross talk between the second left sum and the second right sum to produce a left channel simulation signal and a right channel simulation signal.
2. The method of claim 1, wherein:
said step of forming a head related transfer function includes performing a cascade of at least one resonator andor anti-resonator.
3. The method of claim 1, wherein:
each step of selectively reverberating includes
providing at least one delay of a left channel input;
selectively attenuating each at least one delay of the left channel input;
summing the selectively attenuated at least one delay of the left channel input thereby forming a first sum signal;
forming a first head related transfer function of the first sum signal relative to a listener’s left ear;
forming a second head related transfer function of the first sum signal relative to a listener’s right ear;
providing at least one delay of a right channel input;
selectively attenuating each at least one delay of the right channel input;
summing the selectively attenuated at least one delay of the right channel input thereby forming a second sum signal;
forming a third head related transfer function of the second sum signal relative to a listener’s right ear;
forming a fourth head related transfer function of the second sum signal relative to a listener’s left ear;
summing said first and fourth head related transfer functions thereby forming a third sum;
summing said third sum and the left channel input thereby forming a left channel output;
summing said second and third head related transfer functions thereby forming a fourth sum; and
summing said fourth sum and the right channel input thereby forming a right channel output.
4. The method of claim 1, wherein:
each step of forming a head related transfer function includes performing a cascade of at least one resonator andor anti-resonator.
5. The method of claim 1, wherein:
said at least one delay of the left input channel differs from said at least one delay of the right channel input.
6. The method of claim 1, wherein:
said step of providing at least one delay of a left channel input consists of providing a cascade of a plurality of delays; and
said step of providing at least one delay of a right channel input consists of providing a cascade of plurality of delays.
7. The method of claim 6, wherein:
said step of selectively attenuating each at least one delay of the left channel input includes attenuating each of said plurality of delays; and
said step of selectively attenuating each at least one delay of the right channel input includes attenuating each of said plurality of delays.
8. The method of claim 1, wherein:
said step of summing said third sum and the left channel input includes weighting the left channel input by a first weighting factor and weighting said third sum by a second weighting factor; and
said step summing said fourth sum and the right channel input includes weighting the right channel input by said first weighting factor and weighting said fourth sum by said second weighting factor.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A clamping force generation mechanism for a transmission, the mechanism comprising:
a hub shell cover having a first reaction surface, the hub shell cover adapted to couple to a hub shell;
a traction ring having a second reaction surface, wherein the traction ring comprises an annular groove, the second reaction surface comprising a set of ramps and a plurality of flat surfaces, the traction ring further comprising a traction surface;
a plurality of load cam rollers interposed between the first and second reaction surfaces;
a load cam roller retainer adapted to retain the plurality of load cam rollers, wherein the load cam roller retainer comprises a retainer tab extension; and
a spring, adapted to be at least partially housed in the annular groove, the retainer tab extension configured to engage a first end of the spring, the traction ring adapted to engage a second end of the spring, wherein the plurality of load cam rollers are configured to roll up the set of ramps and come to rest on the plurality of flat surfaces of the traction ring.
2. The mechanism of claim 1, wherein the hub shell cover comprises a central bore adapted to receive a bearing.
3. The mechanism of claim 1, wherein the first reaction surface comprises a set of ramps.
4. The mechanism of claim 1, further comprising a cam driver having a set of ramps.
5. The mechanism of claim 1, wherein each of the plurality of load cam rollers is configured to roll along a path including at least one of the set of ramps and at least one of the plurality of flat surfaces.
6. A clamping force generator (CFG) for a transmission, the CFG comprising:
a traction ring having a first side, a middle portion, and a second side, wherein the first side comprises a set of ramps and a plurality of flat portions and wherein the second side comprises a traction surface, wherein each of a plurality of load cam rollers is configured to roll along a path including at least one of the set of ramps and at least one of the plurality of flat portions;
a spring having a first end and a second end;
wherein the traction ring is adapted to couple to one end of the spring; and
a load cam roller retainer for retaining the plurality of load cam rollers, the load cam roller retainer having at least one tab adapted to engage the second end of the spring.
7. The CFG of claim 6, wherein the spring is a torsion spring, and wherein the traction ring comprises a hole for receiving the first end of the torsion spring.
8. The CFG of claim 6, wherein the set of ramps comprises spring-loaded ramps.
9. The CFG of claim 8, further comprising a set of torque transferring shoulders coupled to the spring-loaded ramps.
10. The CFG of claim 9, wherein a coupling between load cam rollers retained in the load cam roller retainer and the set of spring-loaded ramps is configured to prevent the load cam rollers from decoupling from the set of spring-loaded ramps during a free-wheeling or back-driving condition.
11. The CFG of claim 6, wherein when the torsion spring expands to a diameter that is substantially equal to an inner diameter of the retainer extension the load cam rollers are positioned substantially at or near the flat portions of the ramps.
12. The CFG of claim 6, wherein the spring is a torsion spring, and wherein when the torsion spring expands to its full diameter in a free, unwound state, the diameter of the torsion spring is larger than an inner diameter of the retainer extension.
13. The CFG of claim 6, wherein the CFG is an input-side clamping force generator.
14. A clamping force generation mechanism for a transmission, the mechanism comprising:
an annular ring having a first reaction surface having a first set of ramps;
a traction ring having a second reaction surface, wherein the traction ring comprises an annular groove, the second reaction surface comprising a second set of ramps and a plurality of flat surfaces;
a plurality of load cam rollers interposed between the first and second reaction surfaces, wherein each of the plurality of load cam rollers is configured to roll up the second set of ramps and come to rest on the plurality of flat surfaces of the traction ring;
a load cam roller retainer adapted to retain the load cam rollers, wherein the load cam roller retainer comprises a retainer tab extension;
and a spring, adapted to be at least partially housed in the annular groove, the retainer tab extension configured to engage a first end of the spring, the traction ring adapted to engage a second end of the spring.
15. The mechanism of claim 14, wherein the annular ring further comprises a central bore having a reinforcing rib.
16. The mechanism of claim 15, wherein the central bore further comprises a set of splines.
17. The mechanism of claim 15, wherein the annular ring further comprises a shoulder adapted to receive a thrust bearing.
18. The mechanism of claim 14, wherein the first reaction surface comprises a plurality of flat surfaces.
19. The mechanism of claim 14, wherein the traction ring further comprises a traction surface.
20. The mechanism of claim 14, wherein each of the plurality of load cam rollers is configured to roll along a path including at least one of the second set of ramps and at least one of the plurality of flat surfaces.