What is Ogg

                  Ogg is a free and open standard container format maintained by the Xiph.Org Foundation. The Ogg format is not limited by software patents and is designed to efficiently stream media and process high quality digital multimedia.

“Ogg” means a file format that can be incorporated into a wide variety of free and open source codecs, including audio, video, text (like subtitles) and metadata processing.

Under Ogg's multimedia framework, Theora provides a lossy image plane, often using a music-oriented Vorbis codec as a sound layer. The compressed codec Speex for speech design and the lossless audio compression codecs FLAC and OggPCM may also be used as sound effects.

& ldquo;Ogg” This vocabulary usually refers to the Ogg Vorbis audio file format, which is the format in which the Vorbis encoded sound is included in the Ogg container. In the past, the .ogg extension was used in any Ogg-supported format; but in 2007, the Xiph.Org Foundation made a request for backward compatibility considerations, leaving .ogg only to the Vorbis format. use. The Xiph.Org Foundation decided to create some new extensions and media formats to describe different types of content, such as .oga for sound effects, .ogv for sounds with or without sound (including Theora), and programs used by the program. .ogx.

Xiph.Org Foundation's reference implementation of Ogg, the latest version is libogg 1.2.0 released on March 26, 2010. Another version of libog2 can also be found in the Xiv.Org Foundation's SVN package. Both libraries are free software released under the new BSD license.

Because its format is free, and its reference implementation is not in the form of Copyleft, whether it is a free or proprietary, commercial or non-commercial media player, or even some manufacturers' portable media players and GPS receivers All of them use various codecs under Ogg.

MP3 is a lossy compression format, so the compressed data is lossy compared to standard CD music. VORBIS is also lossy compression, but by using a more advanced acoustic model to reduce losses, the same bit rate encoded OGG sounds better than MP3. In addition, there is another reason why the MP3 format is protected by patents. If you want to publish your work in MP3 format, you will need to pay Fraunhofer (invented MP3 company) royalties. And VORBIS has no such problem at all. For fans, the significant benefit of using OGG files is that they can achieve superior sound quality with smaller files. Moreover, since OGG is completely open and free, making OGG files will not be subject to any patent restrictions, and it is expected that a large number of encoders and players will be available. That's why there are so few MP3 encoders and mostly commercial software, because Fraunhofer charges royalties.

Advantage 1: Ogg Vorbis sound quality is comparable to MP3

Because Vorbis uses completely different mathematical principles than MP3, the challenges of compressing music are different. In the listening test, the same bit rate encoded Vorbis and MP3 files have the same sound quality.

If both files are encoded at the same bit rate and CBR (constant bit rate, which means that the file is a bit rate from start to finish), then they must be the same size. Currently Vorbis is encoded in VBR (which can be

bit rate), which makes Ogg files smaller, because VBR can handle audio data that can be compressed greatly (such as silent time). save space. At what bit rate can Vorbis be encoded?

In theory, there is no fixed bit rate. Vorbis is designed to encode at bit rates from 16kbps to 128kbps/channel. However, there is no restriction in the specification to encode files in 512kbps or 8kbps.

Advantage 2: Ogg Vorbis supports ID3 information similar to MP3

The Vorbis format includes a flexible and complete comment bar that can be used to fill in various related information.

Advantage 3: Ogg Vorbis format supports streaming playback

Audio streaming is an important part of Vorbis. The vorbis format is based on the ease of streaming from the very beginning of the design. And, Vorbis designers are working with Icecast's creators to make Icecast compatible with Vorbis.

Advantage 4: Ogg Vorbis avoids the cumbersome operation of ID3 tags like MP3 files

Vorbis has a well-designed and flexible annotation that avoids the cumbersomeness of ID3 tags like MP3 files. Operation; Vorbis also has bit rate scaling: the bit rate of the file can be adjusted without re-encoding. Vorbis files can be divided into small pieces and edited at sample granularity; Vorbis supports multiple channels; Vorbis files can be logically connected.