Ogg Vorbis, the ogg vorbis audio format
Ogg Vorbis is an unlicensed audio compression format developed by the Xiph.org Foundation, a non-profit organization.
Ogg is a file (container) format specification, Vorbis is a compression format specification, and both are collectively called Ogg Vorbis. The Ogg container is standardized as RFC 3533 and can store video and other audio formats, as well as audio in Vorbis format. The standard extension is “.ogg”. The Vorbis format was developed as an unlicensed alternative format after it was discovered after broadcast that the MP3 format, which was widely used in the field of audio compression, could not be used freely due to patents owned by companies. . The specification itself is open to the public as a public domain with waiver of all rights, and can be freely used by anyone. The reference code to be used as a reference when developing related software is published as a type of BSD license. Vorbis compresses using MDCT (Modified Discrete Cosine Transform), and the compressed data is basically Variable Bit Rate (VBR). If the bit rate is the same, the sound quality is better than MP3, and if the sound quality is the same, it can be compressed to a lower capacity than MP3. However, it is more complicated to process than MP3 and consumes more memory area for playback. Initially, it was noted that the encoding speed was slow, but with the contribution of programmers around the world, high-speed encoders have been developed and released. In Vorbis, you can select the compression ratio by adjusting the value representing the sound quality called “quality level” in 12 steps from -1 to 10. Supports gapless playback at the format level, and the part can be skipped. Silent between songs and play it smoothly.
