DCC is a consumer audio format developed by Philips to be backwardly compatible with conventional analog compact cassettes (not very popular outside Europe).
The DCC has chromium dioxide tape running at the same speed as conventional compact cassettes, namely 1 7 / 8 inches per second.
The housing has drive apertures on one side with a sliding cover.
The tape travel and head direction are reversed at the end of a side fixed heads have nine parallel tracks covering half the tape width, and two analog heads for replay of conventional cassettes.
Precision adaptive sub-band coding or PASC for a 4:1 reduction in data rate.
References
Watkinson, J., 1992, The Art of Digital Audio, Focal Press, Oxford