Exp - golomb codes are applied to code the pairs of the run - length of zero coefficients and the nonzero coefficient for lower storage requirement . c2dvlc is a low complexity coder in terms of both computational time and memory requirement 以往視頻編碼標準如h . 263定義了可選擇的算術編碼器,新近的h . 264 avc標準也采用了高效的算術編碼方法cabac 。