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Posted byAdmin
PCM vs ADPCM Most of the natural signals such as voice are analog signals. However, since computers and almost all the equipment we use today are digital, converting those analog signals to digital signals are essential. For example, to record a voice into a computer, the signal should be represented as a series of bits. […]
Posted byAndrew
E1和T1 E1和T1数字电信tion carrier standards, initially developed in different continents to carry voice conversations simultaneously using time division multiplexing. Both the standards use transmit and receive paths separately to achieve full duplex communication. E1 is the European hierarchy, which was called as CEPT30+2 (European Conference of Postal and Telecommunications […]