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# Mu-Law Expander

Implement µ-law expander for source coding

Source Coding

## Description

The Mu-Law Expander block recovers data that the Mu-Law Compressor block compressed. The formula for the µ-law expander, shown below, is the inverse of the compressor function.

`$x=\frac{V}{\mu }\left({e}^{|y|\mathrm{log}\left(1+\mu \right)/V}-1\right)\mathrm{sgn}\left(y\right)$`

The input can have any shape or frame status. This block processes each vector element independently.

## Parameters

mu value

The µ-law parameter of the compressor.

Peak signal magnitude

The peak value of the input signal. This is also the peak value of the output.

## Supported Data Type

PortSupported Data Types
In
• double

Out
• double

## Pair Block

Mu-Law Compressor

## References

[1] Sklar, Bernard. Digital Communications: Fundamentals and Applications. Englewood Cliffs, N.J.: Prentice-Hall, 1988.

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