Compression

Posted by admin | 3D Tech,Compression | Monday 2 August 2010 13:27

Compression/Decompression Technology Makes the Difference in Image Quality

That alone will not wholly resolve the compatibility issues between different 3D broadcasters and TVs, though. The problem is that there is a variety of implementation for the above-mentioned RealD and SENSIO 3D formats. Concretely, there are differences in image compression and decompression technology, and which (if any) error correction technologies are used. These differences manifest themselves as differences in image resolution and data processing speed in many cases. The details of the physical implementation will sway image fidelity and price.

Assuming that side-by-side is the easiest method to implement, then the horizontal image resolution after compression will degrade to half the source for both left and right images (Fig. 4). This compression is, in principle, non-recoverable, which means significant quality loss in unavoidable when the images are decompressed for viewing on the set. A number of proprietary specifications have emerged as engineers search for ways to minimize this image deterioration. A source at one broadcaster says “The difference in compression/decompression technology between the first 3D sets in about 2007, and the sets today, makes an enormous difference in image quality.”

Fig. Multiple Proprietary Specs for Side-by-Side Compression/Decompression
Differences in the compression/decompression technology used in side-by-side can result in significant differences in 3D image resolution, resistance of the transmission path to noise, data volume and interoperability.