Circuit and process for chrominance decoding with analog or digital delay line in a television system of a pal or secam type

摘要

The present invention provides a matching circuit for connecting a chrominance decoding integrated circuit normally connected by terminals to a conventional analog delay line so as to make it compatible with a digital delay line. This matching circuit comprises a switch connecting alternately each of the outputs of the integrated circuit to an analog-digital convertor connected to a digital delay line, to a digital-analog convertor, then to a switch routing the signal alternately to each of the two summators whose other inputs receive directly the output of the integrated circuit. The summators supply then respectively the chrominance signals R-Y and B-Y.