Question
Download Solution PDFCompanding is used to
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe smaller the signal strength, the stronger it is hit by the quantization process. Companding is used to protect these small strength signals from quantization noise.
Companding:
- Companding, also known as Companded PCM, is a non-uniform quantization technique.
- It is implemented to improve the signal to quantization noise ratio of weak signals.
- The compression of the signal at the transmitter and expansion at the receiver is combined to be called companding. This is shown in the form of a block diagram:
- Companders like A-law and μ-law Companders are used in PCM to compress signals before input to the ADC in the transmitter stage and expand it after the input to DAC at the receiver.
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