VLSI architectures of two-dimensional filters for HDTV coding

Key components for implementation of HDTV subband coding schemes are filter banks for band splitting at the transmitter side and for band synthesis at the receiver side. The authors deal with VLSI architectures and implementations of these filters. To reduce hardware cost and size, VLSI realizations of filter banks by dedicated circuits are considered. The impact of the filter algorithms, architectural structures and circuit technique on the implementation is explained. In particular, the advantages of quadrature mirror filters (QMFs) for the hardware implementation of two-dimensional HDTV filter banks are presented. The potential of dedicated circuit design with consideration of all a priori knowledge is illustrated for a 14×10 tap QMF filterbank with on-chip line memories