Is DVD compatible with CD-i?
No it is not. It is not required by the DVD specification and no manufacturer has decided to provide this. Due to the (old) CD-i technology it would be very expensive to produce a combi player that handles both formats. The professional Philips DVD player however provides extended functionality on top of the DVD Video standard and is becoming the defacto successor for many professional CD-i applications. More and more interactive DVD titles are now also appearing for consumers.