There was a commercial requirement text for 3D TV broadcasters and set-top box manufacturers, but no technical information was in there.
This is made by a spatial multiplex that combines the left and right video sequences in one HD stream which is coded with H.264 as a single image.
It must be also possible to include in the broadcast signal information about the pixel arrangement used to decimate the master HDTV full samples/line pictures to create the anamorphic version, if 3D is available.
It is used in Blu-ray players, but at the moment it's not applicable to broadcast because of the processing time for encoding, which uses motion compensation algorithms.
Total Free viewpoint television can be reached by capturing multiple views and extracting 2D+depth information from them to create a 3D model of the scene.