Joint quantization and integer transform normalization using a mantissa-exponent representation of a quantisation parameter

摘要

A method is provided for the quantization of a coefficient. The method comprises: supplying a coefficient K; supplying a quantization parameter (QP); forming a quantization value (L) from the coefficient K using a mantissa portion (Am(QP)) and an exponential portion (XAe(QP)). Typically, the value of x is 2. In some aspects of the method, forming a quantization value (L) from the coefficient K includes L = K * A(QP) = K * Am(QP) * (2Ac(QP)). The function of the mantissa portion contains different structures corresponding to different basis functions of the transform.