Blu-ray Disc standard developed by a group of companies called the Blu-ray Disc Association, led by Philips and Sony. Compared to HD DVD (HD-DVD) with similar characteristics and development. Blu-ray disc with a capacity of 25 GB on a single layer. (Single-Layer) and 50 GB dual-layer (Double-Layer), while HD DVD single layer with 15 GB and two floors with 30 GB, which can increase the refractive index, a 4-layer capacity. Write to the 128 GB one.
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