Multi dimensional sound circuit

Details Multi dimensional sound circuit Multi dimensional sound circuit

1992-11-12

1994-06-07

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Quadrasonic

H04S 300

Patent

active

053197135

ABSTRACT:
An audio sound system decodes from non-encoded two-channel stereo into at least four channel sound. The rear channel information is derived by taking a difference of left minus right and dividing that difference into a plurality of bands. In a simplistic implementation, at least one band is dynamically steered while the other band is unaltered so as to avoid any perceived pumping effects while providing transient information to left/right, as well as directional enhancement. In a preferred embodiment, multiple bands are dynamically steered left or right, so as to enhance directional information to the rear of the listener. In both schemes, the low pass filtered output of the sum of the left and right inputs is also combined with the directionally enhanced information, so as to provide a composite left rear and right rear output. Furthermore, the center channel information does not necessarily require a discrete loudspeaker, and can be divided so that low frequency information can be applied to the rear channels while mid and high frequency information from the center channel can be applied to the front left and right channels to compensate for any perceived loss of center information.

REFERENCES:
patent: 3632886 (1972-01-01), Scheiber
patent: 4414430 (1983-11-01), Gerzon
patent: 4589129 (1986-05-01), Blackmer
patent: 4680796 (1987-07-01), Blackmer
patent: 4932059 (1990-06-01), Fosgate
patent: 4941177 (1990-07-01), Mandell et al.
patent: 5067157 (1991-11-01), Ishida et al.
patent: 5216718 (1993-06-01), Fukuda
patent: 5251260 (1993-10-01), Gates
patent: 5263087 (1993-11-01), Fosgate

Affiliated with

Also associated with

Rating

Multi dimensional sound circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi dimensional sound circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi dimensional sound circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-799819