Title :
The columbia compatible stereophonic record
Author :
Goldmark, P. ; Bauer, B. ; Bachman, W.
Author_Institution :
CBS Laboratories, New York, N.Y.
Abstract :
A "compatible" stereophonic record is one which will reproduce full stereophonic sound when played on a stereophonic phonograph and will be indistinguishable from an LP record when played on a monaural phonograph. Such a record may be obtained by recording the sum signal S=L+R as lateral modulation and the difference signal D=L-R as vertical modulation and suitably modifying D so that the tracking possibilities of monaural pickups are not exceeded.
Keywords :
Audio systems; Elasticity; Loudspeakers; Uninterruptible power systems;
Journal_Title :
Audio, IRE Transactions on
DOI :
10.1109/TAU.1958.1166130
