Polarity reversal and electronic decorrelation fixed mono surround head-localization.
Evidence
In the beginning the surround signal was monophonic, meaning that listeners on the center line localized the sound in their heads, which was not acceptable. The first remedy was to reverse the polarity of one of the surround loudspeakers, which helped. A substantial improvement, introduced by Shure HTS, was to electronically decorrelate the sounds emerging from the left and right loudspeakers (Julstrom, 1987). This was very effective, and the idea, although not the Shure patented algorithm, was adopted by THX. — Toole, Floyd E, Sound reproduction- the acoustics and…, 761
Categorization
Category: Causal Relationships
Related
- Decorrelation of surround channels solved in-head localization in home theaters. (similarity 0.89)
- Headphone reproduction lacks the spatial cues loudspeakers in rooms provide (similarity 0.80)
- Headphones calibrated to semi-reflective room sound best reproduce stereo recordings made for loudspeakers. (similarity 0.80)
- Canceling speaker HRTFs can synthesize virtual surround sound when head position is fixed (similarity 0.80)
- Audible acoustic polarity effects require the ear’s asymmetric detection process (similarity 0.80)
- Surround loudspeakers close to listeners become distractingly localizable. (similarity 0.79)
- Processing corrected at discrete seats also improves sound between and around those seats. (similarity 0.78)
- Loudspeaker signals can be computed as virtual microphone signals with first-order directional patterns. (similarity 0.78)
- Loudspeaker evaluation requires mono, while enjoyment happens in multichannel (similarity 0.78)