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DVD stands for Digital Versatile Disc. Due to wide spreading of this disk as a media for high-quality video distribution, DVD is often called Digital Video Disc. But most people just use the abbreviation - DVD without specifying what V is. A DVD disc and a CD disc look the same (both 120mm diameter). But that's the end of the "sameness". It's essentially a bigger (not in size, but capacity), faster CD that can hold cinema-like video, better-than-CD audio, and computer data. DVD aims to encompass home entertainment, computers, and business information with a single digital format, eventually replacing audio CD, videotape, laserdisc, CD-ROM, and perhaps even video game cartridges. DVD has widespread support from all major electronics companies, all major computer hardware companies, and all major movie and music studios. With this unprecedented support, DVD has become the most successful consumer electronics product of all time in less than three years of its introduction.



DVD Cloner

DVD Cloner

DVD-CLONER designed to backup your favorite DVD movies. Have you stored your DVD movies properly? According to a survey among movie fans, we find that half of them can't keep their movies more than 3 years due to the following reasons:

  • 24% accidentally damaged by children or pets
  • 25% naturally worn or damaged by defective DVD player
  • 25% lost
  • 13% become unusable itself or by unfavorable weather
  • 13% others

So it is critical to backup your DVD movies and DVD-CLONER becomes your best choice. >>>


dvdSanta: The Most Easy to Use DVD Creating Tool

DVD Creating Tool

dvdSanta is an All-in-One software that lets you copy, create, convert and burn your DVD movies. It can copy 9GB double layer DVD movies into a 4.7GB DVD-R disc, can turn your photos into DVD movies with Hollywood style motion effects, can convert other video formats (avi, wmv, vob, asf, DivX, Mpeg,...) into DVD video, can transfer miniDV camcorder tapes directly to DVD video. >>>

 

What Is DVD?

By the time DVD ("Digital Video Disc" or "Digital Versatile Disc") was introduced to the American public in March 1997, years of research and development had preceded its arrival as the "next generation" format of home entertainment. Consumer electronics manufacturers and movie studios established an industry-wide DVD-video standard in 1996; and by the end of 1997, DVD players had set sales records and well over 500 DVD movie titles had been released, with the rate of new releases rapidly increasing from that point forward.

A DVD is identical in thickness (1.2 millimeters) and diameter (120 millimeters or 4.7 inches) to a standard Compact Disc, but that's where the similarities end. The DVD's storage capacity is seven times that of a CD, with a 4.7-gigabyte capacity on a single-side/single-layer DVD. That's the data-storage equivalent of a 133-minute movie, thus allowing 95 percent of all movies to fit comfortably on a single-layer DVD, eliminating the need for "flipping" the disc and leaving extra room for multiple audio, language, and subtitle tracks; bonus materials; menu screens; and other features unique to DVD. This capacity is nearly doubled (8.5 GB) on a single-side/dual-layer DVD, and quadrupled (17 GB) on a double-side/dual-layer DVD, allowing DVD to flourish not only as a movie-lover's format, but as an amazingly flexible medium (DVD-ROM) for high-definition computer games and multimedia applications. In short, this makes DVD the home entertainment and multimedia format of the new millennium.

Why should I bother with DVD?

Don't worry--you won't have to trash your VCR if you don't want to. But the vastly improved audio and video quality of DVD, along with its durability and flexibility (no rewinding, instant scene access, etc.) makes VHS pale in comparison. You don't need an upgraded home-theater system (unless DVD makes you want one!); and affordable DVD players are compatible with CDs, while some "combo" models allow the playback of DVDs, CDs, and laserdiscs. With all major movie studios now supporting the format, the selection of current and classic movies on DVD (along with music videos, opera, documentaries ... you name it!) is rapidly expanding, along with outlets for DVD sales and rentals.

From big screen to little disc (a basic primer)

Videophiles and laserdisc loyalists will debate the pros and cons of DVD for years, but one thing is certain: the process of transferring a movie to DVD is highly advanced and designed to deliver the highest quality of audio and video available. For every video format (VHS, laserdisc, and DVD), the process begins with "telecine" (TEL-a-sin-ee), but the procedures for DVD adhere to much higher standards. The telecine process begins when light is passed through the film (frame by frame, with exacting precision) and strikes an array of semiconductors that convert the light into electrical signals. That information is then digitally transferred to High Definition video (HD), which is capable of picture resolution nearly equal to that of the original film.

The HD master can be color-corrected and further checked to match the original film (a process often involving the film's director and cinematographer). Then its massive data capacity must be compressed via MPEG-2 encoding (developed by the Motion Picture Experts Group, or MPEG), which produces a varying rate of transferred data to exploit similarities from one film frame to the next. Less data is required for redundant details while more data is reserved for complex details such as rain, smoke, crowd scenes, etc. (This process leads to image-quality debates between laserdisc and DVD fanatics, due to the idiosyncrasies of MPEG-2 compression, but DVD maintains a definite edge in picture resolution.)

The MPEG-2 digital video transfer is later synchronized with all the audio elements (soundtracks and language or commentary tracks) and then combined on a specialized computer called a "multiplexer," along with all the potential elements of DVD, including subtitles, menu files, chapter stops, closed-captioning, parental-control information, regional encoding, and copy-protection. This digitally combined information is then recorded onto a tape drive, which is then checked for signal integrity, further inspected for quality control, and finally used as the data source from which a master DVD can be made for unlimited duplication.

What does it all mean?

Don't let the techno-babble fool you--find a local consumer outlet and test-drive DVD for yourself, and remember how readily the public traded in their vinyl records for music CDs. The same phenomenon appears to be happening with DVD, although VHS videotapes are far too entrenched in the market to disappear anytime soon. However, as it becomes clear that DVD will avoid the niche-market fate of laserdiscs to become the accepted format for home entertainment, DVD--with its convenience, affordable cost, and superior performance--speaks for itself.


Pocket DVD Wizard

Pocket DVD Wizard

The Pocket DVD Wizard allows you to make backup copies of your personal DVD's, Mpeg, AVI and DivX video and then play them on your Windows Mobile™ Pocket PC.

Imagine the possibilities! You can now record your favorite TV program with your DVD recorder and transfer it to your Pocket PC, then watch it later in the office, or on the beach! >>>


There are 4 standard formats. D10 and D18 are not as common.

A DVD-5 (single sided) DVD-Video disc will hold nominally 133 minutes of high quality MPEG-2 encoded video, together with three surround-sound audio channels and four subtitle channels. (Without video compression one DVD-5 disc would hold only about 3 minutes of video).

A DVD-9 (dual layer) disc increases the playing time to 240 minutes of continuous video.

A DVD-10 (double sided) disc will hold a nominal 133 minutes on each side (ie 266 minutes in all), but the disc needs to be turned over to play the other side.

A DVD-18 (dual layer, doubled sided) disc can hold 240 minutes on each side and the disc also needs to be turned over to play the other side.

Most DVD is D9 or D5 format. DVD-Cloner can clone D9 to just ONE DVDr/rw disc (D5 format) without evident losing.


Backup Software - WinBackup - Backup Made Easy
A Six Point Guide to Buying Backup Software
Backup Made Easy: A Six Point Guide to Buying Backup Software
The Need for a Backup Strategy
The Need for Backup
DVD Burner: GEAR PRO Professional Edition for DVD/CD-RW
DVD Cloner: backup your favorite DVD movies
Video Converters
WinAVI Video Converter
AVI to DVD VCD SVCD
MPEG to DVD Burner
EZ DVD Copy: Copy any DVD movie to CD-R or DVD-R
DVD-Squeeze: Copy any DVD to a CD
Media Master - take your movies in any format - AVI, MPEG, DVD, or DivX!
DVDSanta: The Most Easy to Use DVD Creating Tool
Super DVD Creator
DVD Glossary
Why can't the content in DVD be duplicated in the usual ways?
DVD Formats
What is D5 and D9? What is the difference? Any other formats?
DVD Knowledge
What are DVD Menu and Navigation?
DVD Copy Protection
How to get the best DVD quality?
DVD Region Coding
DVD Video Disc Structure
What is DVD
DVD Software Links
DVD Software News
DVD X Player: First region-free software DVD player
Pocket DVD Wizard - watch DVD recordings on Pocket PC
DVD X Ghost: Region Free Software
ImTOO DVD Ripper - DVD to VCD, DivX, MPEG, AVI converter
DVD Photo Slideshow FAQ
DVD Photo Slideshow
DVD Software

DVD Files and Directories

The VOBs and other data are contained in files in the VIDEO_TS directory. The table below gives an example of these files for a single title set disc.

Filename Description
VIDEO_TS.IFO
VIDEO_TS.VOB
VIDEO_TS.BUP
VMGI file (Video Manager Information)
VOB file for VMG Menu
VMGI backup file
VTS_01_0.IFO
VTS_01_0.VOB
VTS_01_0.BUP
VTSI file (VTS Manager Information)
Video Object Set for VTS Menu
VTSI backup file
VTS_01_1.VOB
VTS_01_2.VOB
. . . . . .
VTS_01_n.VOB
First Title Video Object Set file
Second Title Video Object Set file
. . . . . .
Last Title Video Object Set file (n not more than 9)

The audio, video and subpictures for the movie are contained in up to 9 Title VOB files, where each file is not more than 1GB in size. For a DVD-5 there will be no more than 5 Title VOB files, for a DVD-9 a full 9 will be required if the disc is full.

The VTS*.* files can be repeated for each VTS and will be named VTS_02*.*, VTS_03*.* etc. Each VTS will have one each of the .IFO and .BUP files plus one or more .VOB files.

 

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