Polyphase matrix
id:
polyphase-matrix-285-9262700
title:
Polyphase matrix
text:
In signal processing, a polyphase matrix is a matrix whose elements are filter masks. It represents a filter bank as it is used in sub-band coders alias discrete wavelet transforms. If h , g are two filters, then one level the traditional wavelet transform maps an input signal a 0 to two output signals a 1 , d 1 , each of the half length: Note, that the dot means polynomial multiplication; i.e., convolution and ↓ means downsampling. If the above formula is implemented directly, you will compute
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Polyphase_matrix
date created:
date modified:
2020-10-24T08:00:07Z
main entity:
{"identifier":"Q7226737","url":"https://www.wikidata.org/entity/Q7226737"}
image:
fields total:
13
integrity:
13