| 摘要 |
In the present invention, in order that compatibility should be realized between contents protection based on a framework of restricted receiving in MPEG-2 broadcasting and contents protection using Right Object like in OMA DRM, a transmitting apparatus transmits: a first encrypted digital video bit stream (3) protected by first rights information in a PMT information and key information in ECM/EMM; and a second encrypted digital video bit stream (29) protected by ECM/EMM that stores Right Obj ect that contains second rights information and key information and rights object identification information. In a receiving apparatus, the first encrypted digital video bit stream (62) is readout on the basis of the first rights information in the PMT information and the key information contained in the ECM/EMM, while the second encrypted digital video bit stream (79) is read out on the basis of the second rights information and the keys contained in the ECM/EMM that stores the rights object identified by the rights object identification information.
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