Digital data transmission method, digital data transmission device and digital data receiving device

摘要

First digital data (4) obtained by encoding a low-resolution digital video signal at a low-resolution compression encoder (13) and second digital data (5) obtained by encoding a high-resolution digital video signal at a high-resolution compression encoder (16) are multiplexed and transmitted with information relating to programs wherein identification information for identifying both digital data (4, 5) is described, and at a receiving (22) side, the first and second digital data are identified on the basis of the identification information, and are reproduced by corresponding decoders (28, 30). Therefore, when image of different resolutions is transmitted by multiplexing, it is possible to reproduce data correctly at the receiving side, thereby increasing freedom in program composition.