Discrete cosine transform processor using a c.c.d. programmable transversal filter

The design and performance of a compact discrete-cosine prime-transform processor using a charge-coupled-device programmable transversal filter is reported. The c.c.d. design used here allows the required operations of data permutation and correlation to be performed in the same device. In addition, this arrangement permits an N-stage c.c.d. filter to be used for implementation of an N-point transform. This represents a factor-of-two reduction in c.c.d. stages over previously reported systems.