DIFF Subgroup
H04B 3/23 using a replica of transmitted signal in the time domain, e.g. echo cancellers
Introduced: January 1980
Full Title
Full titles differ between systems:
IPC:
Line transmission systems > Details > Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other > using a replica of transmitted signal in the time domain, e.g. echo cancellers
CPC:
Line transmission systems (combined with near-field transmission systems H04B5/00) > Details > Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other > using a replica of transmitted signal in the time domain, e.g. echo cancellers
Of 6 combined children, 0 exist in both systems.
6 codes are CPC-only extensions.
Child Classifications
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