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Opus: Xiph.Org Foundation, Internet Engineering Task Force: 2012-09-11 RFC 6716 (libopus 1.5.1) Free libopus, FFmpeg Speech, VoIP, Low latency, Studio/transmitter link, wireless audio, voice recording, WebRTC Yes Yes No Yes [29] No OSQ: Steinberg: 2002 ? Free WaveLab: FFmpeg (decoding only) Music archival Yes No Yes No No QOA: Dominic ...
Opus streams are also supported in Matroska, [17] WebM, [18] MPEG-TS, [19] and MP4. [20] Alternatively, each Opus packet may be wrapped in a network packet which supplies the packet length. Opus packets may be sent over an ordered datagram protocol such as RTP. [21] An optional self-delimited packet format is defined in an appendix to the ...
Examples of audio coding formats include MP3, AAC, Vorbis, FLAC, and Opus. A specific software or hardware implementation capable of audio compression and decompression to/from a specific audio coding format is called an audio codec ; an example of an audio codec is LAME , which is one of several different codecs which implements encoding and ...
Audio file icons of various formats. An audio file format is a file format for storing digital audio data on a computer system. The bit layout of the audio data (excluding metadata) is called the audio coding format and can be uncompressed, or compressed to reduce the file size, often using lossy compression.
Opus: Lossy: 2012-09 Royalty-free Yes Yes Yes Yes Yes No Yes No No Vorbis: Lossy: 2000-05 Open source [93] Yes Private No No Tricky [δ] No No No No MP2: Lossy: 1991-12 Patent-free [ε] Yes Yes No Yes Yes Yes Yes No No MP1: Lossy: 1991-12 Expired patents Yes Yes No Yes Yes Yes Yes No No QDesign Music 1 and 2 Lossy: 1998 Proprietary: QuickTime ...
Audio-only MPEG-4 files generally have a .m4a extension. This is especially true of unprotected content. MPEG-4 files with audio streams encrypted by FairPlay digital rights management as were sold through the iTunes Store use the .m4p extension. iTunes Plus tracks, that the iTunes Store currently sells, are unencrypted and use .m4a accordingly.
Android 2.3 [67] and later supports AAC-LC, HE-AAC and HE-AAC v2 in MP4 or M4A containers along with several other audio formats. Android 3.1 and later supports raw ADTS files. Android 4.1 can encode AAC. [68] WebOS by HP/Palm supports AAC, AAC+, eAAC+, and .m4a containers in its native music player as well as several third-party players ...
In 2011, a public listening test [14] comparing the two best-rated HE-AAC encoders at the time to Opus and Ogg Vorbis indicated that Opus had statistically significant superiority at 64 kbit/s over all other contenders, and second-ranked Apple's implementation of HE-AAC as statistically superior to both Ogg Vorbis and Nero HE-AAC, which were ...