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For example, MP3 and AAC dominate the personal audio market in terms of market share, though many other formats are comparably well suited to fill this role from a purely technical standpoint. First public release date is first of either specification publishing or source releasing, or in the case of closed-specification, closed-source codecs ...
Comparison of coding efficiency between popular audio formats. An audio coding format [1] (or sometimes audio compression format) is a content representation format for storage or transmission of digital audio (such as in digital television, digital radio and in audio and video files). Examples of audio coding formats include MP3, AAC, Vorbis ...
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.
YouTube originally offered videos at only one quality level, displayed at a resolution of 320×240 pixels using the Sorenson Spark codec (a variant of H.263), [29] [30] with mono MP3 audio. [31] In June 2007, YouTube added an option to watch videos in 3GP format on mobile phones. [32]
An audio format is a medium for sound recording and reproduction. The term is applied to both the physical recording media and the recording formats of the audio content —in computer science it is often limited to the audio file format , but its wider use usually refers to the physical method used to store the data.
If a film has not been submitted for a rating or is an uncut version of a film that was submitted, the labels Not Rated (NR) or Unrated (UR) are often used. Uncut/extended versions of films that are labeled "Unrated" also contain warnings saying that the uncut version of the film contains content that differs from the theatrical release and ...
Dolby Surround 7.1 (sometimes called Dolby 7.1 surround sound) is a sound system by Dolby Laboratories which delivers theatrical 7.1 surround sound to movie-goers. It is the most recent addition to a family of audio compression technologies developed by Dolby known as Dolby Digital. It adds two new channels to current Dolby Digital 5.1.
Digital sound and the 5.1 format were introduced in 1990, by Kodak and Optical Radiation Corporation, with releases of Days of Thunder and The Doors using the CDS (Cinema Digital Sound) format. When digital sound was applied to 35 mm release prints, with Batman Returns in 1992, the 5.1 layout was adopted. The ability to provide 5.1 sound had ...