Multimedia File SizesMultimedia File sizeLow res photo for the web - 1024x720 - jpg 100 KbPhoto for printing A4 size –jpg – 4000x3000 4MBPhoto for magazine (RAW format) 4000x3000 13MBMusic – wav file – 3 minutes 20MBMusic - mp3 -128kbps – 3 minutes 3MBMusic - mp3 - 256kbps – 3 minutes 6MB90 minutes of DVD quality video (xvid/divx/mp4 compression) 720x480 700MB1 DVD film (mpeg compression) 720x480 4.5GB1 hour of Digital Video (DV compression on tape) 720x480 13GB1 hour of HiDef video (AVCHD compression on memory card) 1920x1080 6GB1 hour of HiDef video (HDV compression on tape) 1920x1080 11GB
How optical storage is changing Pit size Laser Track Data Maximim Year on the Comments Name Optical Storage wave distance Transfer Capacity Market length Rate CD Compact Disc 0.834 μm 780nm 1.6μm 1200 Kbps 650 MB 1982 Enough space for about 90 minutes of compressed video DVD Digital Versatile Disc 0.4 μm 650nm 0.74μm 10.5 Mbps 4.7 GB 1996 Many formats - maximum size is 17 GB - DVD-18 (Double sided and double layer)Blu Ray 0.204 μm 405nm 0.4μm 36-54 25 GB 2006 Double sided possible - at the moment this Mbps becoming quite normal in EuropeCBHD China Blue High 0.204 μm 405nm 0.4μm 36 Mbps 30 GB 2006 Double sided possible - very cheap, used Definition extensively all over China HVD Holographic ? ? ? 1000 Mbps 6 TB 2016 Theoretical 1 PB (Peta Byte) Uses the Versatile Disc (125 MB/s) interference of two green laser beams and a third red laser beam is used to monitor the position of the green laser beams. Stores information in laser interference fringes (patterns)5D DVD Five-Dimensional ? ? ? 1500 Mbps 10 TB 2018 5D DVDs use a writing system that uses Digital Verstaile extremely tiny particles on which data is Discs written, with multiple layers that are read by three different colours of laser
A particular slide catching your eye?
Clipping is a handy way to collect important slides you want to go back to later.