Filter Design Toolbox

wordlength

Return the word length for a quantizer

Syntax

wordlength(q)

Description

wordlength(q) returns the word length of quantizer q.

Examples

q = quantizer([16 15]); 
wordlength(q) 

returns 16.

Even though the word length can be read in two stages,

q = quantizer([16 15]); 
fmt = q.format; 
w = fmt(1); 

it is handy to have it available for use in equations. For example, the algorithm for realmax(q) when q is a signed fixed-point quantizer (q.mode = 'fixed') is

which can be coded as

q = quantizer('fixed',[8 4]); 
r = pow2(wordlength(q) - fractionlength(q) - 1) - eps(q) 

See Also
fractionlength  Return the exponent length of a quantizer.

exponentlength  Return the fraction length for a quantizer.

unitquantizer

zerophase