Mark's DVD Page

Updated on :- 06/08/2000

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What is a DVD Player?

A DVD player is the state of the art addition to your home entertainment system that allows you to watch a movie of more than 2 hours in length in the utmost quality from a 12-cm disc, a size of your standard CD. You can have the comforts of your home and also experience theater-like quality in picture and sound with digital audio and video with a DVD player. What's DVD? DVD is a next generation media to lead consumer electronics. -Uses MPEG-2 Compression Technology -Same size as Compact disc -Maximizes the recording density of the surface of disc -Holds up to 17GByte data The Capacity of DVD is 7 times the Capacity of CD, 640 MB. -DVD uses narrower tracks and more of them than a CD. -DVD also uses red-laser with short-wave length. -Each track also has more pits to hold more data. DVD vs CD-ROM Comparison   DVD CD-ROM Single Layer Dual Layer Laser wavelength 650nm (635nm) 780nm 780mm Track Pitch 0.74um 1.6um 1.6um Disc Diameter 120nm 120nm Disc Thickness 1.2 (0.6x2) mm 1.2mm Linear Velocity 3.49m/s 3.84m/s 1.2 - 1.4m/s About DVD disc format Single sided Disc Single side / Single Layer 4.7GB Single side / Dual Layer 8.5GB Double sided Disc Double side / Single Layer 9.4GB Double Side / Dual Layer 17GB DVD Application Area Not only Consumer products (A/V), but also IT industry. FORMAT TYPE APPLICATIONS DVD-Video Playback Only movie s/w, audio/visual packaged media with high quality recording of sound and images DVD-ROM Read Only large-capacity data media making possible high-level multi-media application programs for computers DVD-AUDIO Playback Only packaged media of high fidelity music DVD-RAM Data Rewritable high-capacity rewritable data media for computer use DVD-R 1-time Record high-capacity write-once data media for computer use DVD-Recorder A/V Rewritable high-capacity rewritable A/V media for home use DVD Specifications    DVD-VIDEO VIDEO-CD Laser Disc Video Compression Tech MPEG-2 MPEG-1 Analog  Number of Pixels 720 X 480 352 X 240 Vertical Resolution Max 500 Lines Max 240 Lines Approx.. 420 Lines Compression Rate 1 / 40 1 / 140 Analog  Bit Rate Max 9.8Mbps (Variable) 1.15Mbps (Fixed) Aspect Ratio 16:9 / 4:3 4 : 3 4 : 3 Audio Audio max 8 streams 2ch stereo 2 Analog ch.2 Digital ch. (16bit 44.1khz) or 1 Analog ch.1 Stream of Dolby Digital Ch. (16bit 44.1khz)     Recording Method Dolby Digital Linear PCM MPEG-1 Layer 2 Bit Rate 448Kbps 6.144Mbps 224Kbps (Fixed) Channel 5.1Ch 8Ch 2 Channel Only Sampling Frequency 48KHz 16,20,24bit 48, 96KHz; 16bit, 44.1KHz Distinctive features of DVD Category Feature Comparison Remark The highest Picture Quality Higher Resolution than LD ( Up to 500 H/line ) VCR : 240 line MPEG-2 Digital compression Tech. The highest Sound Quality Theater-quality sound ( 5.1Ch ¡æ Speaker 6 System ) VCD : 2Ch HiFi VCR : 2Ch Dolby AC-3 The biggest capacity 133 Minutes Movie in a single disc ( 4.7GB ) CD : 74 Minutes CD-ROM : 640MB High-density Recording Tech. Multiple Aspect Ratio 16:9 (Wide) & 4:3 4:3 only Letter Box, Pan&Scan Multi-function Up to 8 languages dubbing Up to 32 languages subtitles 1 Caption Audio portion 1.3 GB Multi-Angle Variety of View point per one scene - 9 Different angles A Block Diagram of the DVD Player

 

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