Matrix-vector multiplier module for natural/synthetic hybrid video coding

An architecture of a Matrix-Vector Multiplier (MVM) is devised, which is dedicated to MPEG-4 natural/synthetic video decoding. The MVM can perform the matrix-vector multiplication both in the IDCT (Inverse Discrete Cosine Transform) and in the geometrical transformation of 3D CG; or specifically, can achieve the multiplication of a 4×4-matrix by a 4-tuple vector necessary both in the 1D IDCT for eight pixels and in the geometrical transformation for a point in a 3D space. The present paper describes a new architecture of this MVM, and also shows the implementation result of a functional module composed of four MVMs with the use of 440 K transistors, which can operate at 20 MHz or less