Important formulae and problems solving in pcm
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Companding is a non-linear technique used in PCM that compresses data at the transmitter and expands the same data at the receiver. It involves compressing higher amplitude analog signals and amplifying them less than lower amplitude signals before transmission, then expanding them and amplifying higher amplitude signals more in the receiver. This reduces the effects of noise and crosstalk.
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Important formulae and problems solving in pcm
- 3. Problems:
- 16. COMPANDING IN PCM Companding The word Companding is a combination of Compressing and Expanding, which means that it does both. This is a non-linear technique used in PCM which compresses the data at the transmitter and expands the same data at the receiver. The effects of noise and crosstalk are reduced by using this technique.
- 17. Companding is the process of compression and then expansion. With companded system, the higher amplitude analog signals are compressed (amplified less than lower amplitude signals) prior to transmission and then expanded (amplified more than the lower amplitude signals) in the receiver.