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Expired patents [ 10] MP3 (formally MPEG-1 Audio Layer III or MPEG-2 Audio Layer III) [ 4] is a coding format for digital audio developed largely by the Fraunhofer Society in Germany under the lead of Karlheinz Brandenburg, [ 11][ 12] with support from other digital scientists in other countries.
Spring-motor-powered disc record player, c. 1909. The wax cylinder got a competitor with the advent of the Gramophone, which was patented by Emile Berliner in 1887. The vibration of the Gramophone's recording stylus was horizontal, parallel to the recording surface, resulting in a zig-zag groove of constant depth.
Timeline of audio formats. 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.
Sound recording and reproduction is the electrical, mechanical, electronic, or digital inscription and re-creation of sound waves, such as spoken voice, singing, instrumental music, or sound effects. The two main classes of sound recording technology are analog recording and digital recording . Acoustic analog recording is achieved by a ...
A larger sized, hard disk memory type PMP: the Archos 605 (2000s) A small DAP: the SanDisk Clip Jam (2010s) A portable media player ( PMP) or digital audio player ( DAP) is a portable consumer electronics device capable of storing and playing digital media such as audio, images, and video files.
The bottom view shows the edge of the player (including its proprietary connector) and the included parallel-port adaptor. The Rio PMP300 is one of the first portable consumer MP3 digital audio players, and the first commercially successful one. Produced by Diamond Multimedia, it was introduced September 15, 1998 [1] as the first in the "Rio ...
A person singing karaoke in Hong Kong ("Run Away from Home" by Janice Vidal). Karaoke (/ ˌ k ær i ˈ oʊ k i /; [1] Japanese: ⓘ; カラオケ, clipped compound of Japanese kara 空 "empty" and ōkesutora オーケストラ "orchestra") is a type of interactive entertainment system usually offered in clubs and bars, where people sing along to pre-recorded accompaniment using a microphone.
One patented off-balance throw. Hey, this Williams kid is pretty good when he's not going against the Bears' defense. In his last practice before Saturday's game on Thursday, Williams threw three ...