DIFF Subgroup
H04S 3/02 of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
Introduced: January 1980
Full Title
Full titles differ between systems:
IPC:
Systems employing more than two channels, e.g. quadraphonic > of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
CPC:
Systems employing more than two channels, e.g. quadraphonic (H04S5/00, H04S7/00 take precedence) > of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
No child classifications to compare. This is a leaf node in both IPC and CPC.