Besides these hardware specifications, Blu-ray is associated with a set of multimedia formats. DVD-Video discs were limited to a maximum resolution of 480i ( NTSC, 720×480 pixels) or 576i ( PAL, 720×576 pixels).
High-definition (HD) video may be stored on Blu-ray Discs with up to 1920×1080 pixel resolution, at 24 progressive or 50/60 interlaced frames per second. Triple-layer discs (100 GB) and quadruple-layer discs (128 GB) are available for BD-XL re-writer drives. Conventional or pre-BD-XL Blu-ray Discs contain 25 GB per layer, with dual-layer discs (50 GB) being the industry standard for feature-length video discs. The plastic disc is 120 millimetres (4.7 in) in diameter and 1.2 millimetres (0.047 in) thick, the same size as DVDs and CDs. Up to four layers are possible in a standard form BD.Ĥ05 nm diode laser with a focused beam using more power than for reading Unlike CD and DVD, the reflection has a blue hue.ĭata encoding: CLV or Zoned CAV pits-and-lands with interleaved error correction code
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