Features of DVD discs
A, Large capacity (DVD Copy)
CD and DVD discs and VCD discs are very similar in diameter to 80 or 120mm, thickness 1.2mm, but in fact their very different. DVD can be divided into single layer, single-sided double-layer, double-sided single layer and double-double of four physical structure. Single-sided single layer DVD have a capacity of 4.7GB, while the double-double of the DVD capacity up to 17GB (about 26 times the CD).
B, Nice picture quality (DVD Player Software)
DVD uses the most advanced digital compression technology MPEG ?.
MPEG ?: MPEG ? video data decompress is divided into two steps, first analyse the scene complexity, distribute more bits on the screen that have more details, fewer of assigned bits to less detailed images parts; second Step is to analyse picture frame redundancy between the frame for the painting before and after the effective inter-frame interpolation and predictive coding, a small amount of compensation for the motion part. The use of this technology have greatly improved the clarity of the screen, only a small number of DVD and other AV products or higher products are using this technology. Up to 450-550 lines of horizontal resolution. Far more than 250 lines VCD and SVCD’s 350 line. Resolution up to 720 × 480.
C, excellent sound quality (Video Converter)
DVD support 48kHz ~ 96kHz audio sampling rate, word length available among 16bits, 20bits, 24bits, far better than LD’s 44KHZ. DVD can be suppressed with DOLBY DIGITAL, DTS (DIGITAL THEATER SYSTEM) digital audio signal information. After decoding playback, you can enjoy the thrilling six-channel DOLBY DIGITAL or DTS sound field effect.