[Philip Lelyveld comment: article about Sisvel 3D encoding approach]
[Excerpt]
… In 2010, Sisvel Technology launched an alternative 3D transmission format that fulfills these criteria. The 3D Tile Format™ replaces the ipso facto standard of vertical or horizontal resolution halving, with a full-resolution image for both left and right eyes. The two stereoscopic images for left and right are delivered at full 720p resolution, fitting into the 1080p frame without requiring extra bandwidth. The perceived image quality is therefore of the full HD experience the subscriber signed up for, without the image degradation caused by heavy compression.
Like the current method, the 3D Tile Format does not need any special equipment or changes to production and transmission infrastructure. This sets it apart from other possible alternative methods such as 2D plus delta, which do require alterations in the infrastructure, at the set top box and TV, and in the bandwidth allocation since the 2D signal uses the full 10M bandwidth normally allocated for the channel and the depth (delta) information needs another 40% on top.
What makes the 3D Tile Format a particularly elegant solution is its simplicity: the cropping window information – which is used to slice the image – is already part of the specification of the H.264 format.
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