Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Introduced: September 1968

Last revised: January 2006

Full Title

Line transmission systems > Details > Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Classification Context

Section:: ELECTRICITY
Class:: ELECTRIC COMMUNICATION TECHNIQUE
Subclass:: TRANSMISSION

2 direct subcodes

Child Classifications

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H04B 3/21 using a set of bandfilters
H04B 3/23 using a replica of transmitted signal in the time domain, e.g. echo cancellers