edsp::quantizer Namespace Reference

Functions
template<typename InputIt , typename OutputIt >
constexpr void	mu_law_compression (InputIt first, InputIt last, OutputIt d_first, meta::value_type_t< InputIt > absolute_max_value, meta::diff_type_t< InputIt > compression_factor)
	The \( \mu \) law converts data in 16-bit linear formats to a 8-bit µ-law format. More...
template<typename InputIt , typename OutputIt >
constexpr void	inverse_mu_law_compression (InputIt first, InputIt last, OutputIt d_first, meta::value_type_t< InputIt > absolute_max_value, meta::diff_type_t< InputIt > compression_factor)
	The \( \mu \) law converts data in 8-bit µ-law format to 16-bit linear formats. More...

Function Documentation

inverse_mu_law_compression()

template<typename InputIt , typename OutputIt >

constexpr void edsp::quantizer::inverse_mu_law_compression	(	InputIt	first,
		InputIt	last,
		OutputIt	d_first,
		meta::value_type_t< InputIt >	absolute_max_value,
		meta::diff_type_t< InputIt >	compression_factor
	)

The \( \mu \) law converts data in 8-bit µ-law format to 16-bit linear formats.

The de-compression process is performed as follows:

\[ {\displaystyle F^{-1}(y)=\operatorname {sgn}(y){1 \over \mu }{\Bigl (}(1+\mu )^{|y|}-1{\Bigr )}~~~~-1\leq y\leq 1} \]

Parameters

first	Input iterator defining the beginning of the input range.
last	Input iterator defining the ending of the input range.
d_first	Output iterator defining the beginning of the destination range.
absolute_max_value	Maximum value of the input
compression_factor	Compression ratio

Returns

mu_law_compression()

template<typename InputIt , typename OutputIt >

constexpr void edsp::quantizer::mu_law_compression	(	InputIt	first,
		InputIt	last,
		OutputIt	d_first,
		meta::value_type_t< InputIt >	absolute_max_value,
		meta::diff_type_t< InputIt >	compression_factor
	)

The \( \mu \) law converts data in 16-bit linear formats to a 8-bit µ-law format.

The compression process is performed as follows:

\[ {\displaystyle y=F(x)=\operatorname {sgn}(x){\frac {\ln(1+\mu |x|)}{\ln(1+\mu )}}~~~~-1\leq x\leq 1} \]

Parameters

first	Input iterator defining the beginning of the input range.
last	Input iterator defining the ending of the input range.
d_first	Output iterator defining the beginning of the destination range.
absolute_max_value	Maximum value of the input
compression_factor	Compression ratio