Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of BE562956ApublicationCriticalpatent/BE562956A/xx
H04J3/04—Distributors combined with modulators or demodulators
H04J3/042—Distributors with electron or gas discharge tubes
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04B—TRANSMISSION
H04B14/00—Transmission systems not characterised by the medium used for transmission
H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
H04B14/06—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation
H04B14/062—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation using delta modulation or one-bit differential modulation [1DPCM]