The present invention relates to an information processing device and method, recording medium, and program that make it possible to enhance a data transfer speed. In a recording medium, a recording area is divided into a plurality of pseudo zones, and a set of a plurality of pseudo zones is made to be a pseudo zone group. Addresses are determined for each pseudo zone area such that the addresses are interleaved between pseudo zones composing a pseudo zone group. Interleaving addresses between pseudo zones in this way makes it possible to reduce nearby seek operations and waiting for rotation when multiple channels of recording medium data are simultaneously recorded or played back and to enhance data transfer speed. This invention can be applied to an optical disk.