An orthogonal transform chip set.

This paper presents a set of custom chip building blocks and two digital signal processing systems constructed from them. The basic building blocks are a complex multiplier (rotator), a communication processor, a matrix transpose memory, a look- up table, and a normalization unit. The first system is a general eight point orthogonal transforms, like the popular trigonometric transforms (FFTs, DCTs) and the optimal (Karhunen- Loeve) transform. It can also be used for QR decomposition. The second system embodies a two dimensional eight by eight Discrete Cosine Transform (DCT), a major part of image compression systems. The chips have been submitted on CMOS shuttle #8 and samples are expected in mid August. It is estimated that they can be clocked at 10 MHz resulting in a throughput of 5.7 million 8-point transforms per second.