Class: Noyes::HammingWindow

Inherits:
Object
  • Object
show all
Includes:
Math, NoyesFilterDSL
Defined in:
lib/ruby_impl/hamming_window.rb,
lib/common/noyes_dsl.rb

Overview

Takes a m x n matrix and multiples each inner array by a hamming window function. Be careful to make sure your inner array length is the same as the window size.

Instance Method Summary collapse

Methods included from Math

#dot_product, log2, max, min

Methods included from NoyesFilterDSL

#+, #|

Constructor Details

#initialize(window_size) ⇒ HammingWindow

Returns a new instance of HammingWindow.



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# File 'lib/ruby_impl/hamming_window.rb', line 7

def initialize window_size
 twopi = 2 * PI
 @hamming_window = []
  window_size.times do |i|
 	@hamming_window << 0.54 - 0.46*cos(twopi*i/(window_size-1))
 end
end

Instance Method Details

#<<(segments) ⇒ Object 



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# File 'lib/ruby_impl/hamming_window.rb', line 14

def << segments
  segments.map do |s|
    s.zip(@hamming_window).map {|d, h| d*h}
  end
end