variable-depth
variable-differential
variable-duration
variable-elevation
variable-focal-length
variable-format
variable-frequency
variable-gain
variable-inductance
variable-iris
  variable-length
variable-metric
variable-mu
variable-parametric
variable-pitch
variable-pulse
variable-rate
variable-ratio
variable-reactance
variable-reflectivity
variable-reluctance

    variable-length coding

    неравномерное кодирование