What is:   3GP   3ivx   AAC   ASF   ASPI   Audio_TS   AVI   Bitrate   CDA   DVD Chapter   Codec   Combo Drive   Convert & Converter   DIVA   DivX   DTS   DV   DVD   Encoding   I Frame   M3U   mini-DVD   MOV   MP3   MP4   MPEG   NTSC   PAL   CD DVD Rip   SVCD   VCD   VHS   Video Encoding   Video_TS   VOB   WMA   WMF   WMP   WMV   XVCD   XviD


3GP - The mpeg4 based video format used in mobile terminals, like cell phones. TOP

3ivx - An MPEG-4 toolkit that supports MPEG-4 Video, MPEG-4 Audio and the MP4 File Format. TOP

AAC - Stands for Advanced Audio Coder. An audio-encoding standard for MPEG-2 that is not backward-compatible with MPEG-1 audio. TOP

ASF - Stands for Advanced Streaming Format. stores audio and video information, and it is specially designed to run on networks like the Internet. ASP is a highly flexible and compressed format that contains streaming audio, video, slide shows, and synchronized events. When you use ASF files, content is delivered to you as a continuous flow of data. When an AVI file is compressed and converted to an ASF file, the file begins playing after only a few seconds. TOP

ASPI - Stands for Advanced SCSI Programming Interface. Originally developed by Adaptec. It is a software layer that enables programs to communicate with SCSI and ATAPI devices(CD and DVD Drives and other storage peripherals). TOP

AUDIO_TS - UDF file name used for the DVD-Audio directory on a DVD disc volume. DVD-Audio is a separate format from DVD-Video so on a standard DVD-Video is the AUDIO_TS folder empty. TOP

AVI - Stands for Audio Video Interleaved, storing sound and moving pictures in RIFF format developed by Microsoft. An AVI file can use different codecs and formats so there is no set format for an AVI file unlike for example standard VCD video which sets a standard for resolution, bitrates, and codecs used.  TOP

Bitrate - is the average number of bits that one second of video or audio data will consume. Higher bitrate means bigger file size and generally better video or audio quality while lower bitrate means lower file size but worse video or audio quality. Some bitrate examples in common video and audio files: MP3 about 128 kbps (kilobits per second); VCD about 1374 kbps; DVD about 4500 kbps; DV about 25 Mbps (megabits per second). TOP

CDA - CD Audio Track, audio files that are on CD media. You can play .cda files only from a CD-ROM. Often the CDA tracks are ripped to WAV or MP3 files. TOP

Combo Drive - A DVD ROM drive capable of reading and writing CD-R and CD-RW media. May also refer to a DVD-R or DVD-RW or DVD+RW drive with the same capability. TOP

Convert & Converter - To change file format ( video or audio format ) from one form into another. In video obviously it is to change form of one video format into another. For example, many people like to convert DivX to MPEG, MOV to AVI, AVI to MPEG etc. Conversions to a final format is called encoding - an example is AVI to VCD MPEG-1, AVI to MPEG-2 etc. The software that can do that should be called Converter, for example: AVI Converter, MPEG Covnerter etc. TOP

DVD Chapter (somewhat confusingly referred to as a 'Part' in the parlence of DVD authors) is generally a logical segment of a Title such as a scene in a film or one interview in a set of cast interviews. There can be up to 999 Chapters in one DVD Title. TOP

Codec - An acronym for "compression/deccompression", a codec is an algorithm or specialized computer program that encodes or reduces the number of bytes consumed by large files and programs. Files encoded with a specific codec require the same codec for decoding. Some codecs you may encounter in computer video production are Divx, MPEG-1, MPEG-2, Xivd, DV type 1 and type 2 for video and MP3 for audio. TOP

DIVA - a powerful MPEG-1/MPEG-2 video converter for Mac OS X 10.2 or later. It uses QuickTime, MPEG, MOV, SMP, AltiVec, YUV, Cocoa, Quartz, XML and other amazingly great acronyms and buzzwords. It's also fast, high quality, and integrates extremely well with 3ivx D4 4.5, allowing it to perform automated 2-pass encoding with 3ivx. TOP

DivX - a new format for digital video, much like MP3 is a format for digital music. DivX is the brand name of a patent-pending video compression technology created by DivX Networks, Inc., The DivX codec is based on the MPEG-4 compression standard. This codec is so advanced that it can reduce an MPEG-2 video (the same format used for DVD or Pay-Per-View) to ten percent of its original size. TOP

DTS - Digital Theater Systems Digital Sound, A product of DTS, Inc., DTS is a multichannel audio compression format similar to Dolby Digital used in DVD-video discs, DVD-audio, 5.1 channel audio CDs, and some movie theaters. DTS differs from Dolby Digital in that it generally uses higher data rates and many have the opinion that DTS is better quality. DTS can only be on a DVD-video disc if accompanied by a Dolby Digital or LPCM track (for North America) or mpeg audio and LPCM (European Community) to ensure compatibility, because DVD players are only required to decode those standards in those regions. TOP

DV - Digital Video, video captured to a PC from a digital camcorder, often through Firewire. There are two methods of storing DV video data, referred to in this article as type-1 and type-2. Both are stored usually in AVI files. TOP

DVD - DVD once stood for Digital Video Disc or Digital Versatile Disc, but now it just stands for DVD -- the next generation of optical disc storage technology. DVD is essentially a bigger, faster CD that can hold cinema-like video, better-than-CD audio, and computer data. TOP

Encoding - is the process of changing data from one form into another according to a set of rules specifiec by a codec. The data is usually a file containing audio, video or still image. Often the encoding is done to make a file compatible with specific hardware (such as a DVD Player) or to compress or reduce the space the data occupies. Common video encoding methods are DivX, MPEG-1, MPEG-2 and MPEG-4. A common audio encoding method is MP3 although many others exist including MPEG1 audio, DTS, and Dolby Digital. TOP

I Frame - An I frame is encoded as a single image, with no reference to any past or future frames. Often video editing programs can only cut MPEG-1 or MPEG-2 encoded video on an I frame since B frames and P frames depend on other frames for encoding information. TOP

M3U - An .m3u file is a special type of metafile playlist that is used with MP3 files that have an .mp3 file extension. The .m3u file includes information about the location of the .m3u file on the computer and the properties of the file. An .m3u file is similar to the ASX playlist files. TOP

mini-DVD - is a DVD video written onto a CD-R(W) instead of a DVD disc. mini-DVD is also sometimes called cDVD. A miniDVD only fits about 15 minutes of DVD quality video on a 650 MB CD-R(W). TOP

MOV - QuickTime Content (.mov, .qt) a file format developed by Apple Computer to create, edit, publish, and view multimedia files. QuickTime supports video, animation, graphics, 3D and virtual reality (VR). TOP

MP3 - is an acronym for MPEG-1 (or MPEG-2) Layer 3 audio encoding (it is not an acronym for MPEG-3). MP3 is a popular compression format used for audio files on computers and portable devices. TOP

MP4 - is a new container format, a container format allows you to combine different multimedia streams into one single file. Multimedia containers are for example the well known AVI, MPEG , Matroska, OGM. MP4 is the global file extension for the official container format defined in the MPEG-4 standard. MP4 is streamable and supports all kinds of multimedia content, multiple audio-, video-, subtitlestreams, pictures, variable-framerates, -bitrates, -samplerates...) and advanced content like 2D and 3D animated graphics, user interactivity, DVD-like menus. TOP

MPEG - An ISO/ITU standard for compressing video offering lossy compression technique (some data of the original image is lost during the compression). TOP

NTSC - Abbreviation of National Television Standards Committee. The NTSC is responsible for setting television and video standards in the United States (in Europe and other parts of the world, the dominant television standards are PAL and SECAM). The NTSC standard for television defines a composite video signal with a refresh rate of 60 fields (half-frames interlaced) per second. Each frame contains 525 lines and can contain 16 million different colors. The resolution of an NTSC VCD is 352x240 pixels, an NTSC SVCD is 480x480, and an NTSC full D1 DVD is 704 or 720 x 480. TOP

PAL - Short for Phase Alternating Line, the dominant television standard in Europe. The United States uses a different standard, NTSC. PAL delivers 625 lines at 50 fields (half-frames interlaced) per second. The resolution of a PAL VCD is 352x288 pixels, a PAL SVCD is 480x576, and a PAL full D1 DVD is 704 or 720 x 576. TOP

CD DVD Rip - To take off the audio or video from a CD or DVD. Often CD Audio is "ripped" to MP3 WAV OGG VQF files or DVD video ripped to AVI MPEG DivX files. TOP

SVCD - stands for 'Super VideoCD'. A SVCD is very similiar to a VCD, it has the capacity to hold about 35-60 minutes on 74/80 min CDs of very good quality full-motion MPEG-2 video along with up to 2 stereo audio tracks and also 4 selectable subtitles. A SVCD can be played on many standalone DVD Players and of course on all computers with a DVD-ROM or CD-ROM drive with the help of a software based decoder / player. TOP

VCD - stands for 'Video Compact Disc' and basically it is a CD that contains moving pictures and sound. If you're familiar with regular audio/music CDs, then you will know what a VCD looks like. A VCD has the capacity to hold up to 74/80 minutes on 650MB/700MB CDs respectively of full-motion video along with quality stereo sound. VCDs use an encoding standard called MPEG-1 to store the video and audio. A VCD can be played on almost all standalone DVD Players and of course on all computers with a DVD-ROM or CD-ROM drive with the help of a software based decoder / player. TOP

VHS - an analog format capable of delivering 240 lines of video resolution, along with stereo sound that's nearly as good as CD (in dynamic range and frequency response). Blank tapes usually feature either 120 minutes or 160 minutes of recording time at the highest recording speed (6 hours or 8 hours at the slowest speed). VHS and VCR's are slowly being phased out in favor of DVD players and other digital tape media. TOP

Video Encoding - The process for changing a video from one format to another by altering the resolution and/or the bitrate. Normally the result of this process is a movie with a different compression. For a proper encoding you need a piece of software and/or hardware, which is called codec. TOP

VIDEO_TS - The UDF file name used for DVD-Video directory on a DVD disc volume. Files under this directory name contain pointers to the sectors on the disc which hold the program streams. TOP

VOB - All DVD movies are stored in on a DVD video disc in so-called VOB files. VOB files usually contain multiplexed Dolby Digital audio 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 labelled VIDEO_TS (all upper case). TOP

WMA - Windows Media Audio. TOP

WMF - Windows Media Format files are audio/video files encoded with the Windows Media Encoder, providing high quality and media security for streaming and download-and-play applications on PCs, set-top boxes, and portable devices. Windows Media Format comprises Windows Media Audio and Video codecs, an optional integrated digital rights management (DRM) system, and a file container. TOP

WMP - Windows Media Player, a multimedia audio and video player bundled with the Windows Operating System. The player can play many different formats natively including WAV, ASF, WMF, MPEG-1 and can play many types of AVI files if the codec is installed including Divx. WMP can also play MPEG-2 with a third party codec installed (like the ones installed by software DVD players such as WinDVD and PowerDVD). TOP

WMV - Windows Media file with Audio and/or Video (WMV): You can use a WMV file either to download and play files or to stream content. The WMV file format is similar to the ASF file format. TOP

XVCD - eXtended VCD, XVCD has same features as VCD but it is possible to use higher bitrates and higher resolution to get higher video quality. XVCD is basically everything that uses MPEG-1 video, is not within the VCD standard, and burned in "VCD" Mode on a CD-R or CD-R(W). XVCD can be played on some hardware VCD or DVD players and many computers with appropriate software. TOP

XviD - is an ISO MPEG-4 compliant video codec. It's not a product but an open source project which is developed and maintained by people around the world. TOP

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