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Encyclopedia > Vorbis
Vorbis
Ogg Vorbis Logo
File extension: .ogg
MIME type: application/ogg
Developed by: Xiph.Org Foundation
Type of format: Audio codec
Contained by: Ogg
Standard(s): Specification

Vorbis is an open source, lossy audio codec project headed by the Xiph.Org Foundation and intended to serve as a replacement for MP3. It is most commonly used in conjunction with the Ogg container and is then called Ogg Vorbis. Image File history File links Fish_xiph_org. ... A filename extension is a suffix to the name of a computer file applied to show its format. ... Multipurpose Internet Mail Extensions (MIME) is an Internet Standard that extends the format of e-mail to support text in character sets other than US-ASCII, non-text attachments, multi-part message bodies, and header information in non-ASCII character sets. ... An audio codec is a computer program that compresses/decompresses digital audio data according to a given audio file format or streaming audio format. ... Look up Ogg in Wiktionary, the free dictionary. ... Standards are produced by many organizations, some for internal usage only, others for use by a groups of people, groups of companies, or a subsection of an industry. ... Open source refers to projects that are open to the public and which draw on other projects that are freely available to the general public. ... A lossy data compression method is one where compressing data and then decompressing it retrieves data that may well be different from the original, but is close enough to be useful in some way. ... A Codec is a device or program capable of performing encoding and decoding on a digital data stream or signal. ... The Xiph. ... A portable MP3 player MPEG-1 Audio Layer 3, more commonly referred to as MP3, is a popular digital audio encoding, lossy compression format, and algorithm, designed to greatly reduce the amount of data required to represent audio, yet still sound like a faithful reproduction of the original uncompressed audio... Look up Ogg in Wiktionary, the free dictionary. ... A container format is a computer file format that can contain various types of data, compressed by means of standardized codecs. ...


Vorbis development began following a September 1998 letter from Fraunhofer Gesellschaft announcing plans to charge licensing fees for the MP3 audio format. Soon after, founder Christopher "Monty" Montgomery commenced work on the project and was assisted by a growing number of other developers. They continued refining the source code until a stable version 1.0 of the codec was released on July 19, 2002. 1998 (MCMXCVIII) was a common year starting on Thursday of the Gregorian calendar, and was designated the International Year of the Ocean [1]. // Coated in ice, power and telephone lines sag and often break, resulting in power outages. ... The Fraunhofer Society (German Fraunhofer-Gesellschaft) is a German research organization named after the German physicist Joseph von Fraunhofer, with 58 institutes spread throughout Germany, each focusing on different fields of applied science (as opposed to the Max-Planck-Gesellschaft, which works primarily on basic science). ... ... Source code (commonly just source or code) is any series of statements written in some human-readable computer programming language. ... July 19 is the 200th day (201st in leap years) of the year in the Gregorian Calendar, with 165 days remaining. ... For album titles with the same name, see 2002 (album). ...


The latest official version is 1.1.2 released on 2005-11-28, but there are some fine-tuned forks, most notably aoTuV, that offer superior audio quality to the official vorbis version, particularly at low bitrates. Source code (called libvorbis) for the Xiph.org release is available from the official xiph.org download page. 2005 (MMV) was a common year starting on Saturday of the Gregorian calendar. ... November 28 is the 332nd day (333rd on leap years) of the year in the Gregorian Calendar. ... In software engineering, a project fork or branch happens when a developer (or a group of them) takes a copy of source code from one software package and starts to independently develop a new package. ...

Contents

Name

"Vorbis" is named after a Discworld character, Exquisitor Vorbis in Small Gods, by Terry Pratchett. Coincidentally, Nanny Ogg is another Discworld character, a witch in the book Witches Abroad, though the Ogg format was not named after her. "Ogg" may in fact be derived from ogging, jargon that arose in the computer game Netrek. // This article is about the novels. ... This article contains brief biographies for characters from Terry Pratchetts Discworld series. ... This article is about the novel Small Gods; for the concept of Small Gods within the Discworld, see Discworld Gods Small Gods is a novel by Terry Pratchett, the thirteenth part of the popular Discworld series. ... Terence David John Pratchett OBE (born April 28, 1948, in Beaconsfield, Buckinghamshire, England[1]) is an English fantasy author, best known for his Discworld series. ... Gytha Ogg (usually called Nanny Ogg) is a character from Terry Pratchetts Discworld series. ... Witches Abroad is a Discworld novel by Terry Pratchett, originally published in 1991. ... Look up Ogg in Wiktionary, the free dictionary. ... Ogging is term for a strategy developed for an online multiplayer game called XPilot and the later version of the game called Netrek. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... Netrek is a free to play open source software cross platform multiplayer hybrid multi-directional shooter and real time strategy game for up to 16 players. ...


Usage

Vorbis applications: OggdropXPd, a drag-and-drop encoder, and Amarok, an audio player. Vorbis' support of Unicode is also evident.
Vorbis applications: OggdropXPd, a drag-and-drop encoder, and Amarok, an audio player. Vorbis' support of Unicode is also evident.

The Ogg Vorbis format has proven popular among supporters of free software[1]. They argue that its higher fidelity and completely free nature, unencumbered by patents, make it a well-suited replacement for patented and restricted formats like MP3. However, MP3 has been widely used since the mid-1990s and as of 2007, continues to dominate in the consumer electronics industry. Of the consumer products supporting lossy compressed digital audio, virtually all support playback of MP3 audio while relatively few support alternative formats like Ogg Vorbis. Image File history File links Download high-resolution version (1024x722, 137 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Vorbis ... Image File history File links Download high-resolution version (1024x722, 137 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Vorbis ... An encoder is a device used to encode a signal (such as a bitstream) or data into a form that is acceptable for transmission or storage. ... Amarok (formerly known as amaroK) is a free software music player for GNU/Linux and other varieties of Unix. ... Unicode is an industry standard designed to allow text and symbols from all of the writing systems of the world to be consistently represented and manipulated by computers. ... For the band, see 1990s (band). ... 2007 is a common year starting on Monday of the Gregorian calendar. ...


In the commercial sector, Vorbis support is on the rise. Many mainstream video game titles such as Unreal Tournament and Grand Theft Auto: San Andreas store in-game audio as Vorbis. Popular software players support Ogg Vorbis playback either natively or through an external plugin. A number of Web sites use it, such as Jamendo and Mindawn, as well as several national radio stations like CBC Radio JazzRadio and Virgin Radio. Namcos Pac-Man was a hit, and became a cultural phenomenon. ... Unreal Tournament, UT, (sometimes referred to as UT99, UT Classic, UT1, or UT:GOTY to differentiate from Unreal Tournament 2003, Unreal Tournament 2004, and Unreal Tournament 3) is a popular first-person shooter video game. ... Grand Theft Auto: San Andreas is the fifth video game in the Grand Theft Auto series. ... A plugin (plug-in, addin, add-in, addon or add-on) is a computer program that interacts with a main (or host) application (a web browser or an email program, for example) to provide a certain, usually very specific, function on demand. ... Jamendo is a music platform and community combining: Creative Commons/Free Art Licence licensed music BitTorrent and eDonkey for full album downloads Ogg Vorbis and MP3 encoded audio files An integrated rating and recommendation system Tags and reviews to discover artists Voluntary donations to artists through Paypal All music on... Mindawn is an online music store that, unlike most major services of its type, offers its songs in lossless FLAC format without copy protection of any kind. ... CBC Radio is the English language radio division of the Canadian Broadcasting Corporation. ... Virgin Radio, originally known as Virgin 1215, is a British commercial music radio station based in London which plays popular music and rock. ...


Codec comparisons

For many applications, Vorbis has clear advantages over other lossy audio codecs in that it is patent-free and has open-source implementations and therefore is free to use, implement, or modify as one sees fit, yet produces smaller files than most other codecs at equivalent or higher quality. The following is a list of codecs. ...


Listening tests have attempted to find the best quality lossy audio codecs at certain bitrates. Some conclusions made by recent listening tests: In telecommunications and computing, bitrate (sometimes written bit rate, data rate or as a variable Rbit) is the number of bits that are conveyed or processed per unit of time. ...

  • Low bitrate (less than 64 kb/s): the most recent public multiformat test at 48 kb/s shows that aoTuV Ogg Vorbis has a better quality than WMA and LC-AAC, the same quality of WMA Professional, and a lower quality than HE-AAC.
  • Mid to low bitrates (less than 128 kb/s down to 64 kb/s): private tests (80 kb/s, 96 kb/s) shows that aoTuV Ogg Vorbis has a better quality than other lossy audio codecs (LC-AAC, HE-AAC, MP3, MPC, WMA).
  • Mid bitrate (128kb/s): most recent public multiformat test at 128 kb/s shows a four-way tie between aoTuV Ogg Vorbis, LAME-encoded MP3, WMA Pro, and QuickTime AAC, with each codec essentially transparent (sounds identical to the original music file).
  • High bitrates (more than 128 kb/s): most people do not hear significant differences. However, trained listeners can often hear significant differences between codecs at identical bitrates, and aoTuV Ogg Vorbis performs very well, i.e. better than other formats such as AAC, MP3, and MPC (see this 180 kb/s test on classical music).

Many of these results, however, are difficult to keep up to date due to the ever-evolving nature of the codecs. Windows Media Audio (WMA) is a proprietary compressed audio file format developed by Microsoft. ... Windows Media Audio (WMA) is a proprietary compressed audio file format developed by Microsoft. ... Musepack or MPC is an open source lossy audio codec, specifically optimized for transparent compression of stereo audio at bitrates of 160-180 kbit/s. ... Look up lame in Wiktionary, the free dictionary. ... QuickTime is a multimedia framework developed by Apple Inc. ... Advanced Audio Coding (AAC) is a standardized, lossy compression and encoding scheme for digital audio. ...


Listening tests

Listening tests are normally carried out as ABX tests, i.e., the listener has to identify an unknown sample X as being A or B, with A (the original) and B (the encoded version) available for reference. The outcome of a test must be statistically significant. This setup ensures that the listener is not biased by his/her expectations, and that the outcome is very unlikely to be the result of chance. If sample X can be identified reliably, the listener can assign a score as a subjective judgement of the quality. Otherwise, the encoded version is considered to be transparent. Below are links to several listening test results. It has been suggested that this article or section be merged with Codec listening test. ...

  • 2005-2006 Public group test of Lame MP3, Vorbis AoTuV, iTunes AAC, Nero AAC, and WMA Pro at ~135 kbit/s nominal. Results suggest that further group testing at this bitrate is unnecessary because all codecs are statistically tied near transparency.
  • 2005, July comparison - AAC vs MP3 vs Vorbis vs WMA at 80 kbit/s. States that aoTuV beta 4 is the best encoder for either classical or various music in this bitrate, and that its quality is comparable to the LAME ABR MP3 at 128 kbit/s.
  • (French) 2005, August comparison - AAC vs MP3 vs Vorbis vs WMA at 96 kbit/s. States that aoTuV beta 4 and AAC are tied as the best encoders for classical music in this bitrate, while aoTuV beta 4 is the best encoder for pop music, even better than LAME at 128 kbit/s.
  • 2005, August comparison - MPC vs VORBIS vs MP3 vs AAC at 180 kbit/s. An audiophile listening test, which states that, for classical music, aoTuV beta 4 has 93% percent probability of being the best encoder, tied with MPC. MPC is tied with both Vorbis, in the first place, and LAME in the second.
  • 2003-2004 comparisons of MP3, Vorbis, AAC, etc at a number of bitrates.

Look up lame in Wiktionary, the free dictionary. ... Average bit rate refers to the average amount of data transferred per second. ... This article or section may contain original research or unverified claims. ...

Technical details

Vorbis nominal bitrate at quality levels for 44.1 kHz stereo input (effective bitrate may vary)
Quality Nominal Bitrate
Official Xiph. Org Vorbis aoTuV beta 3 and later
-q-2 not available 32 kb/s
-q-1 45 kb/s 48 kb/s
-q0 64 kb/s
-q1 80 kb/s
-q2 96 kb/s
-q3 112 kb/s
-q4 128 kb/s
-q5 160 kb/s
-q6 192 kb/s
-q7 224 kb/s
-q8 256 kb/s
-q9 320 kb/s
-q10 500 kb/s

Given 44.1 kHz (standard CD audio sampling frequency) stereo input, the encoder will produce output from roughly 45 to 500 kbit/s (32 to 500 kbit/s for aoTuV tunings) depending on the specified quality setting. Quality settings run from -1 to 10 (-2 to 10 for aoTuV tunings) and are an arbitrary metric — files encoded at -q5, for example, should have the same quality of sound in all versions of the encoder, but newer versions should be able to achieve that quality with a lower bitrate. The bitrates mentioned above are only approximate; Vorbis is inherently variable-bitrate (VBR), so bitrate may vary considerably from sample to sample. A kilohertz (kHz) is a unit of frequency equal to 1,000 hertz (1,000 cycles per second). ... This article or section does not cite its references or sources. ... The sampling frequency or sampling rate defines the number of samples per second taken from a continuous signal to make a discrete signal. ... Variable bit rate (VBR) is a term used in telecommunications and computing that relates to sound or video quality. ...


Vorbis uses the modified discrete cosine transform (MDCT) for converting sound data from the time domain to the frequency domain. The resulting frequency-domain data is broken into noise floor and residue components, and then quantized and entropy coded using a codebook-based vector quantization algorithm. The decompression algorithm reverses these stages. The noise floor approach gives Vorbis its characteristic analog noise-like failure mode (when the bitrate is too low to encode the audio without perceptible loss), which many people find more pleasant than the metallic warbling in the MP3 format. The sound of the compression at low bitrates can be perhaps described as reverberations in an amphithreatre or a room. The modified discrete cosine transform (MDCT) is a Fourier-related transform based on the type-IV discrete cosine transform (DCT-IV), with the additional property of being lapped: it is designed to be performed on consecutive blocks of a larger dataset, where subsequent blocks are overlapped so that the last... Time-domain is a term used to describe the analysis of mathematical functions, or real-life signals, with respect to time. ... Frequency domain is a term used to describe the analysis of mathematical functions with respect to frequency. ... In signal theory, the noise floor is the measure of the signal created from the sum of all the noise sources and unwanted signals within a measurement system. ... Generally, quantization is the state of being constrained to a set of discrete values, rather than varying continuously. ... An entropy encoding is a coding scheme that assigns codes to symbols so as to match code lengths with the probabilities of the symbols. ... Categories: Cryptography stubs | Cryptography ... In data compression, vector quantization is a quantization technique often used in lossy data compression in which the basic idea is to code or replace with a key, values from a multidimensional vector space into values from a discrete subspace of lower dimension. ...


Many users feel that Vorbis reaches transparency (sound quality that is indistinguishable from the original source recording) at a quality setting of -q5, approximately 160 kbit/s.[citation needed] For comparison, it is commonly felt that MP3 reaches transparency at around 192 kbit/s, resulting in larger file sizes for the same sound quality. These are, of course, highly subjective judgements and transparency may be higher or lower for some individuals.


Various tuned versions of the encoder (Garf, aoTuV or MegaMix) attempt to provide better sound at a specified quality setting, usually by dealing with certain problematic waveforms by temporarily increasing the bitrate. The most consistently cited problem with Vorbis is pre-echo, a faint copy of a sharp attack that occurs just before the actual sound (the sound of castanets is commonly cited as causing this effect). Most of the tuned versions of Vorbis attempt to fix this problem and to increase the sound quality of lower quality settings (-q-2 through -q4). Some tuning suggestions created by the Vorbis user community (especially the aoTuV beta 2 tunings) have been incorporated into the 1.1.0 release. Pre-echo is a psychoacoustic phenomenon where an unusually noticeable artifact is heard in a sound recording from the energy of time domain transients smeared backwards in time after processing in the frequency domain due to the Gibbs phenomenon. ... Renoirs 1909 painting Dancing girl with castanets Castanets The castanets are a percussion instrument (idiophone), much used in Moorish music, Roma music, Spanish music and Latin American music. ...


The Vorbis format supports bitrate peeling for reducing the bitrate of already encoded files, and an experimental implementation is available.[1] However, encoding at the lower bitrate will result in better audio quality than this experimental bitrate peeler. Bitrate Peeling is a technique used in Ogg Vorbis audio encoded streams, wherein a stream can be encoded at one bitrate but can be served at that or any lower bitrate. ...


Vorbis streams can be encapsulated in other media container formats besides Ogg. A commonly used alternative is Matroska. A container format is a computer file format that can contain various types of data, compressed by means of standardized codecs. ... Matroska (common file extensions being . ...


Metadata

Vorbis metadata, called comments, support metadata 'tags' similar to those implemented in the ID3 standard for MP3. The metadata is stored in a vector of eight-bit-clean strings of arbitrary length and size. The size of the vector and the size of each string in bytes is limited to 232-1 (about 4.3 billion, or any integer that can be expressed in 32 bits). This vector is stored in the second header packet that begins a Vorbis bitstream.[2] Metadata (Greek meta after and Latin data information) are data that describe other data. ... A Vorbis comment is a metadata container used in the Vorbis and FLAC audio file formats. ... This article or section does not cite its references or sources. ... Eight-bit clean is a term which describes a computer system that deals correctly with extended character sets which (unlike ASCII) use all eight bits of a byte, such as the ISO 8859 series and the UTF_8 encoding of Unicode. ... One thousand million (1,000,000,000) is the natural number following 999,999,999 and preceding 1,000,000,001. ...


The strings are assumed to be encoded as UTF-8. Music tags are typically implemented as strings of the form "[TAG]=[VALUE]", for instance, "ARTIST=The John Smith Band". Like the current version of ID3, users and encoding software are free to use whichever tags are appropriate for the content. For example, an encoder could use localized tag labels, live music tracks might contain a "Venue=" tag or files could have multiple genre definitions. Most applications also support common de facto standards such as discnumber and Replay Gain information. UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode created by Ken Thompson and Rob Pike. ... Replay Gain is a proposed standard published in 2001 to normalize the perceived loudness of computer audio formats such as MP3 and Ogg Vorbis. ...


Licensing

Knowledge of Vorbis's specifications is in the public domain. Concerning the specification itself, Xiph.Org reserves the right to set the Vorbis specification and certify compliance. Its libraries are released under a BSD-style license and its tools are released under the GPL (GNU General Public License). The libraries were originally released under the GNU Lesser General Public Licence, but a BSD license was later chosen with the endorsement of Richard Stallman.[3] The Xiph.Org Foundation states that Vorbis, like all its developments, is completely free from the licensing or patent issues raised by other proprietary formats such as MP3. Although Xiph.Org states it has conducted a patent search that supports its claims, outside parties (notably engineers working on rival formats) have expressed doubt that Vorbis is free of patented technology.[4] The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ... The BSD license is a permissive license and is one of the most widely used free software licenses. ... The GNU logo The GNU General Public License (GNU GPL or simply GPL) is a widely-used free software license, originally written by Richard Stallman for the GNU project. ... GNU logo The GNU Lesser General Public License (formerly the GNU Library General Public License) is an FSF approved free software license designed as a compromise between the GNU General Public License and simple permissive licenses such as the BSD license and the MIT License. ... Richard Matthew Stallman (nickname RMS) (born March 16, 1953) is an acclaimed software freedom activist, hacker, and software developer. ... The Xiph. ... Software patent does not have a universally accepted definition. ... Proprietary software is software with restrictions on using, copying and modifying as enforced by the proprietor. ... A portable MP3 player MPEG-1 Audio Layer 3, more commonly referred to as MP3, is a popular digital audio encoding, lossy compression format, and algorithm, designed to greatly reduce the amount of data required to represent audio, yet still sound like a faithful reproduction of the original uncompressed audio...


Xiph.Org maintains that it was privately issued a legal opinion subject to attorney/client privilege. It has not released an official statement on the patent status of Vorbis, pointing out that such a statement is technically impossible due to the number and scope of patents in existence and the questionable validity of many of them. Such issues cannot be resolved outside of a court of law. Some Vorbis proponents have derided the uncertainty concerning the patent status as "FUD": misinformation spread by large companies with a vested interest. Attorney/client privilege is a legal concept that protects communications between an attorney and their client(s) and keeps those communications confidential. ... Fear, uncertainty, and doubt (FUD) is a sales or marketing strategy of disseminating negative (and vague) information on a competitors product. ...


Ogg Vorbis is supported by several large digital audio player manufacturers such as Samsung, Rio, Neuros Technology, Cowon, and iRiver. Many feel that the growing support for the Vorbis codec within the industry supports their interpretation of its patent status, as multinational corporations are unlikely to distribute software with questionable legal status. The same could be said about its growing popularity in other commercial enterprises like mainstream computer games. Apple iPod, the most popular hard drive-based digital audio player An embedded hard drive-based player (Creative Zen Vision:M), one of the many alternatives for the iPod An MP3 CD player (Philips Expanium) Some mobile phones can be used as digital audio players, such as the Nokia 6233. ... Samsung Group is one of the largest South Korean business groupings. ... Rio was the brand name of a line of digital audio players, best known for producing the model that was sued in 1998 by the Recording Industry Association of America. ... Neuros Technology is a Chicago-based company that produces a number of audio and video devices with the brand name Neuros. ... Cowons company logo Cowon Systems, Inc. ... Current iriver logo iriver (formerly iRiver) Co. ...


Hardware and software support

Hardware

Tremor, a version of the Vorbis decoder which uses fixed-point arithmetic (rather than floating point), was made available to the public on September 2, 2002 (also under a BSD-style license). Tremor, or platform specific versions based on it, is more suited to implementation on the limited facilities available in commercial portable players. A number of versions that make adjustments for specific platforms and include customized optimizations for given embedded microprocessors have been produced. Several hardware manufacturers have expressed an intention to produce Vorbis-compliant devices, and new Vorbis devices seem to be appearing at a steady rate, especially in South Korea, although availability may differ from country to country. Tremor is the name of a software library that decodes the Vorbis audio format. ... It has been suggested that Binary scaling be merged into this article or section. ... A floating-point number is a digital representation for a number in a certain subset of the rational numbers, and is often used to approximate an arbitrary real number on a computer. ... September 2 is the 245th day of the year (246th in leap years) in the Gregorian calendar. ... For album titles with the same name, see 2002 (album). ... The BSD license is a permissive license and is one of the most widely used free software licenses. ...


The VorbisHardware node at the xiph.org wiki has an up-to-date list of Vorbis-supporting hardware, such as portables, PDAs, and microchips. Most digital audio players supported by Rockbox, an open-source firmware project, are capable of decoding Vorbis. Rockbox is a free software replacement firmware for digital audio players (DAPs). ...


Initially the Microsoft DRM specification Janus explicitly required that the device not support Ogg Vorbis, though this requirement has been revoked. Microsoft is one of few companies engaging itself in the console wars Where they are up against sony, nintendo, and of course sharps new console which may cause a threat. ... Digital Rights Management (generally abbreviated to DRM) is an umbrella term that refers to any of several technologies used by publishers or copyright owners to control access to and usage of digital data or hardware, and to restrictions associated with a specific instance of a digital work or device. ... Janus is the codename for portable version of Windows Media DRM for portable devices, whose marketing name is Windows Media DRM for Portable Devices (or in short form WMDRM-PD) introduced by Microsoft in 2004 for use on portable media devices which store and access content offline. ...


Software

Software supporting Vorbis exists for many platforms. Although Apple iTunes does not natively support Vorbis, Xiph. Org provides a QuickTime component which can be used in iTunes and QuickTime on both Microsoft Windows and Mac OS. On Windows, DirectShow filters exist to decode Vorbis in multimedia players like Windows Media Player and others which support DirectShow. Vorbis is well-supported on the Linux platform in programs like XMMS, xine, and many more. More information about Vorbis-supporting software can be found at the VorbisSoftwarePlayers node at the xiph.org wiki. Users can test these programs using the list of Vorbis audio streams available at the Vorbis streams page on the same wiki. Apple Inc. ... The correct title of this article is . ... Microsoft Windows is the name of several families of proprietary software operating systems by Microsoft. ... This article or section does not cite its references or sources. ... Windows Media Player (WMP) is a digital media player and media library application developed by Microsoft that is used for playing audio, video and images on personal computers running the Microsoft Windows operating system, as well as on Pocket PC and Windows Mobile-based devices. ... Logo of the DirectX Media SDK - the first time DirectShow was distributed under its current name. ... Linux (IPA pronunciation: ) is a Unix-like computer operating system family. ... XMMSs default appearance The X Multimedia System (XMMS) is a free audio player very similar to Winamp, that runs on many Unix-like operating systems. ... The correct title of this article is . ...


References

  1. ^ VINJEY. Ogg Vorbis & Downloads. Retrieved on 2006-11-13.
  2. ^ Xiph.Org. Ogg Vorbis Comment Field Documentation. Retrieved on 2007-03-14.
  3. ^ Jack Moffitt (2001-02-26). icecast-dev - Xiph.Org announces Vorbis Beta 4 and the Xiph.Org Foundation. Retrieved on 2006-11-13.
  4. ^ Vorbis development, status & patent issues. Retrieved on 2006-11-13.

For the Manfred Mann album, see 2006 (album). ... November 13 is the 317th day of the year (318th in leap years) in the Gregorian Calendar, with 48 days remaining. ... 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the Anno Domini (common) era. ... For the Lebanese political coalition, see March 14 Alliance. ... For the Manfred Mann album, see 2006 (album). ... November 13 is the 317th day of the year (318th in leap years) in the Gregorian Calendar, with 48 days remaining. ... For the Manfred Mann album, see 2006 (album). ... November 13 is the 317th day of the year (318th in leap years) in the Gregorian Calendar, with 48 days remaining. ...

See also

Free software Portal

Image File history File links Floss_draft. ... Look up Ogg in Wiktionary, the free dictionary. ... A Vorbis comment is a metadata container used in the Vorbis and FLAC audio file formats. ... XML Shareable Playlist Format (XSPF), pronounced spiff, is an XML-based playlist format for digital media, sponsored by the Xiph. ... In its most general form, a playlist is simply a list of songs. ... The following tables compare general and technical information for a variety of audio codecs. ... The Xiph QuickTime Components are Xiph. ... FreeCast Manager, listeners website and FreeCast client FreeCast is a free software application which allows peer-to-peer streaming, sometimes called peercasting. ... PocketOgg is an Ogg Vorbis player program for Windows CE. External links Official site Categories: Computer stubs | Media players ...

External links


  Results from FactBites:
 
Vorbis - Wikipedia, the free encyclopedia (2297 words)
Vorbis is an open and free lossy audio compression (codec) project headed by the Xiph.org Foundation.
Although the Vorbis format is often simply referred to as Ogg, this is technically incorrect as Ogg, like AVI or Matroska, is a container format while Vorbis is an audio codec.
Since the Vorbis libraries are available under a BSD licence (a free software approved licence) and the format itself is accepted as not covered by patents, several video game developers[5] have chosen to use Vorbis in their games rather than pay for patent-encumbered competitors like MP3.
Ogg Vorbis - definition of Ogg Vorbis in Encyclopedia (1274 words)
Vorbis is a completely open and free audio compression (codec) project from the Xiph.org Foundation.
Vorbis was started following a September 1998 letter from Fraunhofer Gesellschaft announcing plans to charge licensing fees for the MP3 format.
Several hardware manufacturers have expressed an intention to produce Vorbis-compliant devices, and new Vorbis devices seem to be appearing at a steady rate, especially in South Korea, although availability might differ from country to country.
  More results at FactBites »

 
 

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