Data Encoding :
In computers, encoding is the process of putting a sequence of characters
(letters, numbers, punctuation, and certain symbols) into a specialized format
for efficient transmission or storage. Decoding is the opposite process --
the conversion of an encoded format back into the original sequence of characters.
Encoding and decoding are used in data communications, networking, and storage.
The data encoding technique is divided into following types,depending upon the type of
data conversion.
-
Analog data to Analog signals :
The modulation techniques such as Amplitude Modulation,Frequency Modulation,
Phase Modulation of analog signals fall under this category.
-
Analog data to Digital signals :
This process can be termed as digitization,which is done by Pulse Code Modulation(PCM).
Hence it is nothing but digital modulation.
-
Digital data to Analog signals :
The modulation techniques such as Amplitude Shift Keying(ASK),Frequency Shift Keying(FSK),
Phase Shift Keying(PSK) etc fall under this category.
-
Digital data to Digital signals :
There are several ways to map digital data to digital signals. Like ---
NRZ,NRZ-I.
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