A method for generating additional information for guaranteeing seamless playback of data streams, a recording medium for storing the information, and recording, editing andor playback apparatus using the same are provided. Forming a layer of hafnium oxide by chemical vapor deposition and forming a layer of a lanthanide oxide by electron beam evaporation, where the layer of hafnium oxide is adjacent and in contact with the layer of lanthanide, provides a dielectric layer with a relatively high dielectric constant as compared with silicon dioxide. The delayed audio difference signal is combined with the right- and left-channel audio signals, thus composite audio signals being generated.