class Diarize::SuperVector

Attributes

vector[R]

Public Class Methods

divergence(sv1, sv2) click to toggle source
# File lib/diarize/super_vector.rb, line 54
def divergence(sv1, sv2)
  return ubm_gaussian_weights.mul(((sv1.vector - sv2.vector) ** 2) / ubm_covariance).sum
end
generate_from_model(model) click to toggle source
# File lib/diarize/super_vector.rb, line 11
def generate_from_model(model)
  # Generates a supervector from a LIUM GMM
  dim = model.nb_of_components * model.components.get(0).dim
  vector = GSL::Vector::alloc(dim)
  model.nb_of_components.times do |k|
    gaussian = model.components.get(k)
    gaussian.dim.times do |i|
      vector[k * gaussian.dim + i] = gaussian.mean(i)
    end
  end
  SuperVector.new(vector)
end
new(vector) click to toggle source
# File lib/diarize/super_vector.rb, line 5
def initialize(vector)
  @vector = vector
end
ubm_covariance() click to toggle source
# File lib/diarize/super_vector.rb, line 39
def ubm_covariance
  # Returns a vector of diagonal covariances, same dimension as speaker's super vectors
  @@ubm_covariance ||= begin
    ubm = Speaker.ubm
    cov = GSL::Vector::alloc(ubm.supervector.dim)
    ubm.model.nb_of_components.times do |k|
      gaussian = ubm.model.components.get(k)
      gaussian.dim.times do |i|
        cov[k * gaussian.dim + i] = gaussian.getCovariance(i, i)
      end
    end
    cov
  end
end
ubm_gaussian_weights() click to toggle source
# File lib/diarize/super_vector.rb, line 24
def ubm_gaussian_weights
  # Returns a vector of gaussian weights, same dimension as speaker's super vectors
  @@ubm_gaussian_weights ||= begin
    ubm = Speaker.ubm
    weights = GSL::Vector::alloc(ubm.supervector.dim)
    ubm.model.nb_of_components.times do |k|
      gaussian = ubm.model.components.get(k)
      gaussian.dim.times do |i|
        weights[k * gaussian.dim + i] = gaussian.weight
      end
    end
    weights
  end
end

Public Instance Methods

dim() click to toggle source
# File lib/diarize/super_vector.rb, line 60
def dim
  @vector.size
end
hash() click to toggle source
# File lib/diarize/super_vector.rb, line 64
def hash
  @vector.to_a.hash
end
to_a() click to toggle source
# File lib/diarize/super_vector.rb, line 68
def to_a
  @vector.to_a
end