How to squeeze two 720p images in a single 1080p frame for 3D
The 3D Tile Format is a series of algorithms that splits a 3-D image into three parts that are compressed in H.264 and then transmitted along with a single HD frame.
This is 2D compatible !
One of the metadata encoded in the H.264 bitstream is the so called “cropping rectangle”, used to signal to the decoder the part of the decoded frame that has to be output to the display. A legacy decoder, while receiving an H.264 encoded 3D signal would display only the area of the frame enclosed by the cropping rectangle.
Read the paper here in BroadcastEngineering.