qosapremier.blogg.se - Types of encoding in communication

Voltage level remains constant during the bit interval which is the main behavior. NRZ codes represents 1 and 0 for High voltage level and low voltage level respectively. Below are the ways to map digital data to digital signals. Digital data to Digital signals − those are discussed in this section.Digital data to Analog signals – Techniques such as Amplitude Shift Keying (ASK), Frequency Shift Keying (FSK), Phase Shift Keying (PSK), etc., come under this category.Better output can be obtained from Delta Modulation than PCM. Key factors in PCM are sampling and quantization.

Analog data to Digital signals – Pulse Code Modulation (PCM) does the digitization process also called as digital modulation.

Analog data to Analog signals – Techniques such as Frequency Modulation, Amplitude Modulation and Phase Modulation of analog signals come under this category.

Encoding Techniquesīelow are the data encoding techniques based on the type of data conversion. Unipolar, Polar, Bipolar and Manchester are the general types of line coding. It is the process of employing number of patters of voltage and current levels to show 1s and 0s of the digital signals on the transmission link. On the other hand, Decoding is quite opposite to Encoding which is extracting information from the converted format.

Encoding is the process of converting a sequence of symbols, characters, alphabets or the data into a specific format for sending the data securely.