What is line code? List some properties of Line Coding?

Line code, also known as digital baseband transmission method or digital baseband modulation, is the code used for converting a sequence of bits to a digital signal. It is used to convert the digital signal from digital data. At the sender side, digital data is converted into a digital signal and vice versa at the receiver side.

• Error detection: Codes like duobinary detect the errors in data. Moreover, it does not need to add new error detection bits into the data sequence. .
• Bandwidth compression: There are some codes which help in enhancing the bandwidth utilization like multilevel codes. It does this by permitting the decrease in needed bandwidth for a given data rate. As a result, more information can be conveyed per unit bandwidth .
• Differential Encoding: In communication inverted waveform is very useful and line code permits the polarity of a differentially encoded waveform to be inverted. In this process, it does not affect the data detection. .
• Noise Immunity: There are some codes which produce lesser bit detection errors in comparison with others (for same transmitted energy) in the presence of noise .
• Transparency: To maintain transparency, long strings of 0s and 1s are avoided.