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DVB 3D-TV

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DVB 3D-TV

DVB 3D-TV is a deprecated standard that partially came out at the end of 2010 which included techniques and procedures to send a three-dimensional video signal through actual DVB transmission standards (cable, terrestrial or satellite). There was a commercial requirement text for 3D TV broadcasters and set-top box manufacturers, but no technical information was in there.

3D television technology was already in its first steps regarding its standardization, the major 3D market was in theaters and Blu-ray Disc players with stereoscopic systems, but in the near future it could be extended to diffusion, and later free viewpoint television will come into our homes, which mean the need of new coding and transmission standards.

The implementation of first generation of DVB 3D-TV could be staggered:

Matrix of signal formats for 3DTV:

Regarding how a signal once it's decoded is sent to the display, current stereoscopic systems use a frame-sequential 3D signal. Left and right frames are sent alternately to the display and by diverse systems like shuttered glasses or polarized glasses are then shown to each eye. This involves that the real frame frequency halves the video frame frequency.

In Phase 1 system, only frame-sequential 3D is allowed, using frame compatible (CFC) format. 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. This allows to handle video as normal HD video using typical channels and interfaces like HDMI, which is possible in this 1.4a version. Frame compatible (CFC) model is also compatible with 2D HD mode in the same channel, adding some signalling for switching from 2D to 3D.

There are basically two ways to do spatial multiplex: Side by side and Top and bottom, but additional spatial multiplex formats have been proposed in order to improve picture quality by providing a better balance between the V and H resolution.

Side by side (SbS) format just put the left and right images one next to the other in an HD image. Because of this, a horizontal decimate is required which causes halving of horizontal definition. DVB 3D-TV supports following SbS formats:

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