UHJ, BHJ, & B-FORMAT EXPLAINED

Ambisonics consists of the B-format and UHJ (BHJ) encoding.

B-FORMAT FOR MICROPHONES

B-format is used for multidirectional mics in 3 dimensions:

θ is the horizontal angle with front being 0 and clockwise rotation being positive.
ø is the vertical angle with the horizontal plane being 0 and up being positive.

This provides a method to record sounds from any 3-dimensional direction.

ENCODING B-FORMAT INTO UHJ DISTRIBUTION MEDIA

2 CHANNEL DISTRIBUTION MEDIA - BHJ

This is the only version commercially available.

The encoded material may be played in stereo or mono with no cancellation of back signals.

2.5 CHANNEL DISTRIBUTION MEDIA - SHJ

3 CHANNEL DISTRIBUTION MEDIA - THJ

4 CHANNEL DISTRIBUTION MEDIA - PHJ

ENCODING UHJ DISTRIBUTION MEDIA FROM DOLBY SURROUND SPEAKER POSITIONS

DECODING UHJ DISTRIBUTION MEDIA BACK TO B-FORMAT

2.5, 3, and 4 channel media

2 channel media

DECODING QUADRAPHONIC FROM B-FORMAT

DECODING DISTRIBUTION MEDIA TO DOLBY SURROUND SPEAKERS