Glossary
| Glossary 1 | DVD, DVD-10, DVD-18, DVD-5, DVD-9, DVD-Audio, DVD-MP3, CSS, VEDIO_TS, AUDIO_TS, VOB, ISO, DAT. |
| Glossary 2 | AAC, AC3, AIFF, FLAC, M4A, M4P, MIDI, MP2, MP3, M3U, MP3 ID3 Tag, ID3, WAV, WMA. |
| Glossary 3 | 3GP, ASF, AVI, MPEG, MPEG1, MPEG2, MPEG4, MPEG7, QuickTime, MOV, RA, RealVideo, RM, RMVB, WMV, DivX, XviD. |
| Glossary 4 | NTSC, PAL, ASX, Codec, DRM, Region codes, Streaming. |
DVD
DVD stands for Digital Versatile Disc.
DVD is essentially a bigger, faster CD that can hold cinema-like video, better-than-CD audio, and computer data. View How to rip DVD to all popular video and audio formats with Only one software? (Rip DVD to MPEG, PSP, iPod, MP4, DivX, AVI, WMV, 3GP, RM, MOV, MP3, WAV, AAC, OGG, WMA, etc.)
DVD-10
DVD-10 is a double sided single layer DVD. Video DVD, DVD-R/W and DVD+R/W support this format. Effectively this means that DVD-10 is a dual-sided DVD-5 and can hold 8.75 gigabytes of data with 4.38 gigabytes on each side. Two-sided discs need to be flipped over in order to access the other data side. Unfortunately many blank DVD media advertisers mislead customers to believe that these discs are actually blank DVD-9 discs in hope that they could copy their dual-layer discs directly to blank discs.
DVD-18
DVD-18 is a double sided dual layer DVD which can fit up to 17 GB or 15.9 computer GB which some commercial video DVDs are using today (a DVD-18 is basicly four pressed plastic DVD-5s pressed together. They are not burned). Video DVD supports this format but DVD-R/W and DVD+R/W does not support this format.
DVD-5
DVD-5 is a single sided single layer DVD that stores up to about 4.7 GB = 4 700 000 000 bytes and that is 4.38 computer GigaBytes where 1 kilobyte is 1024 bytes(4 700 000 000B/1024 = about 4 589 843KB/1024 = about 4485MB/1024 = about 4.38GB). Video DVD, DVD-R/W and DVD+R/W support this format, often referred to as "single sided, single layer".
DVD-9
DVD-9 is a single sided dual layer DVD which can fit up to 8.5 GB or 7.95 computer GB which many commercial video DVDs are using today (a DVD-9 is basically two pressed plastic DVD-5s pressed together. They are not burned). Video DVD supports this format but DVD-R/W and DVD+R/W does not support this format.
DVD-Audio
DVD-Audio is music disc, aimed to replace regular audio CD within next few years. DVD-Audio disc can contain 4 - 18 GBs of data, depending on how many layers and sides of the disc are used. Regular DVD-Audio disc contains various copy-protection methods and obviously the audio data itself -- audio can be stored in various formats, including uncompressed (L)PCM format (in frequencies from 44.1kHz up to 192kHz) with bitrates as high as 9.8Mbit/sec. Other formats allowed include Dolby Digital 5.1, MPEG-1 (stereo, audio layers II and III), MPEG-2 (multichannel), DTS and SDDS.
DVD-Audio discs can't be played with regular DVD-Video players -- the player has to be so-called "Universal DVD" player in order to support DVD-Audio (but if your player has DVD-Audio logo, it supports these discs). View Xilisoft DVD Audio Ripper, ripping DVD to MP3, WAV, WMA, AAC, AC3, OGG, RA formats easily.
DVD-MP3
This type of disc is created when MP3 audio files are burned on a DVDR/W disc. Some DVD Players can play these discs, but many so far cannot. View The best way to rip DVD to MP3, WAV, WMA, AAC, etc.
CSS
CSS stands for Content Scrambling System.
In DVD-Video, an encryption scheme designed to protect copyrighted material that resides on a disc by periodically scrambling the data using encryption keys. A tool named Decss can allow users to circumvent it. Decss didn't exactly crack the CSS, but used leaked decryption keys instead.
VIDEO_TS
On a DVD disc, DVD movie files are stored in the VIDEO_TS folder. There is also an AUDIO_TS folder, which is where DVD-Audio would be stored, but usually the folder is empty.
VOB
VOB stands for DVD Video Object.
The VOB file is one of the core files found on DVD-Video discs and contains multiplexed Dolby Digital audio (normally AC3 format) and MPEG-2 video. VOB files on a DVD are numbered as follows: vts_XX_y.vob where XX represents the title and Y the part of the title. There can be 99 titles and 10 parts, although vts_XX_0.vob does not contain any video, usually just menu or navigational information. You can find them on a DVD video disc in a subdirectory labeled VIDEO_TS. View Xilisoft VOB to AVI MPEG Converter.
ISO
ISO refers also to a CD or DVD image (not picture..) file with an extension of ".iso". The extension comes from the full name of the CD-ROM and DVD-ROM file system specification, ISO 9660. Just like other CD/DVD image formats, ISO is a file that contains full content of the disc, including every single track, directory, file and information about the structure of the disc. Normally ISO files are being used to replicate existing CD/DVD discs, transfer those discs over the network to other location (or to other person) and burn back to CD/DVD which then would be an identical replica of the original disc.
DAT
DAT is used to refer to a certain tape backup format. But in audio/video terminology it normally refers to files that VideoCD has in its SEGMENT or MPEGAV directories. These DAT files are basically MPEG-1 files with an additional information and certain specific file structure -- they are NOT "real" MPEG-1 files and you need to convert them back to "real" MPEG-1 files in order to edit them even that most of the software players treat them as regular MPEG-1 files.
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