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- 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 labelled VIDEO_TS.
- VOX - Dialogic ADPCM format. The Dialogic ADPCM format is commonly found in telephony applications, and has been optimized for low sample rate voice. It will only save mono 16-bit audio, and like other ADPCM formats, it compresses to 4-bits/sample (for a 4:1 ratio). This format has no header, so any file format with the extension .VOX will be assumed to be in this format. more...
- VQF - VQF is one of the "alternative" audio compression formats back in 1990s that was aimed to take over MP3 by providing better audio quality than MP3 with lower bitrate. Failed miserabely due various reasons, most notably because of restrictive licensing. Nowadays the only serious alternatives to MP3 are probably Ogg Vorbis and Microsoft's WMA. TwinVQ is proprietary audio compression format developed by Nippon Telegraph and Telephone Corporation (NTT) and marketed by Yamaha under the name SoundVQ. Its file extension is .vqf.
- WAV (.wav) - uncompressed audio format developed by IBM and Microsoft. Became standard audio file used on PCs. A standard audio format for Windows operating systems, often used for storing high-quality, uncompressed sound. WAV files can contain CD-quality (44.1 KHz/16-bit) audio signals. However, CD-quality WAV files require relatively large amounts of memory ¡ª roughly 10 MB per minute of music. WAV is a container format. more...
- WMA (.wma) - "Windows Media Audio", Microsofts proprietary audio codec designed to compete with MP3. Claims competitive sound quality at lower bitrates. Developed by Microsoft, Windows Media Audio is one of today's most pervasive Internet audio formats. Though not as popular as MP3, proponents of lossy WMA claim that it can outperform MP3 in the area of sound quality, particularly with files encoded at lower bitrates such as 64 or 96 Kbps. This performance advantage makes it handy for applications like portable digital audio players, where total play time is limited by a finite amount of internal memory.
- WMV (Windows Media Video) Microsoft's proprietary lossy compression format for motion video. Windows Media Video is used for both streaming and downloading content via the Internet. Microsoft's Windows Media Player, an application bundled with Windows Vista operating systems, lets you play back and manage a range of audio and video file types, including WMA and WMV.
- XSVCD - XSVCD stands for eXtended SVCD.
XSVCD has same features as SVCD but it is possible to use higher resolution and higher bitrates to get higher video quality. XSVCD burned in "SVCD" Mode on a CD-R or CD-RW can be played on some hardware DVD players and many computers with appropriate software like a software DVD player or a media player with a MPEG-2 codec.
- XVCD - XVCD stands for eXtended VCD.
XVCD has same features as VCD but it is possible to use higher resolution and higher bitrates to get higher video quality. XVCD burned in "VCD" Mode on a CD-R or CD-RW can be played on some hardware VCD or DVD players and many computers with appropriate software.
- Xvid - Xvid is an open-source lossy video codec based on MPEG-4. It was developed in response to DivX, and received its name from the backwards spelling of DivX. Xvid compresses a great deal of video content into relatively small files, and retains a reasonably good video resolution. It can be used with several different operating systems, and is a popular choice for transferring video over the Internet. XviD is an ISO MPEG4 compliant video codec. It's not a product but an open source project which is developed and maintained by people around the world. XviD, like many other MPEG4 formats, can be played with certain MPEG4 compatible, stand-alone DVD/DivX/XviD players. XviD is an open source MPEG-4 video codec. Originally based on OpenDivX, XviD was started by a group of volunteer programmers after the OpenDivX source was closed.
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GLOSSARY
