A phase-change optical disk that has an optical phase-shift signal reproducing structure and the same physical specifications as the 4.7 GB read-only digital versatile disc (DVD) was developed. A minimum jitter of 9% and a wide tilt tolerance for the jitter were obtained under DVD reproducing conditions of λ=650 nm and N A=0.60. This new medium can be used as an inspection tool for DVD authoring. It was also confirmed that this optical disk had a potential for use as a rewritable 4.7 GB DVD medium that has compatibility with the read-only DVD.