Fraunhofer-Gesellshaft now owns the licensing and the patent rights to the audio compression technology that was developed, a technology better known as MP3. The inventors named on the United States Patent 5,, for a "digital encoding process," a. A specialist in mathematics and electronics, Brandenburg—who is often called the "father of MP3"—led the Fraunhofer research. Brandenburg had been researching methods of compressing music since Seitzer, who'd been working on the quality transfer of music over a standard phone line, joined the project as an audio coder. In an interview with Intel , Brandenburg described how MP3 took several years to develop—and almost didn't happen at all. Two days before submission of the first version of the MP3 codec, we found the compiler error. MP3 is part of MPEG, an acronym for Motion Pictures Expert Group, which is a family of standards for displaying video and audio using lossy compression in which random partial data is irreversibly discarded, allowing the remainder to represent a compressed version of the original. MPEG-1 is a video compression standard with low bandwidth. According to Fraunhofer-Gesellschaft, "Without data reduction, digital audio signals typically consist of bit samples recorded at a sampling rate more than twice the actual audio bandwidth e.
Kilobytes, Megabytes, Gigabytes
A short history of the songs in our pockets -- and how late-comer Apple came to dominate the business of portable music. In , engineers at Sony successfully married a compact playback device with lightweight headphones to create the prototype for a product that would become a worldwide hit. In , the 'Walkman' was introduced in the Japanese market, selling out its entire stock of 30, units within the first three months.
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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. Most portable media players are equipped with a 3. In contrast, analogue portable audio players play music from non-digital media that use analogue signal storage, such as cassette tapes or vinyl records. Often mobile digital audio players are marketed and sold as "portable MP3 players", even if they also support other file formats and media types. The immediate predecessor in the market place of the digital audio player was the portable CD player and prior to that, the personal stereo. In particular, Sony 's Walkman and Discman are the ancestors of digital audio players such as Apple 's iPod. It only supported playback of digital audio in Audible's proprietary, low-bitrate format which was developed for spoken word recordings. Capacity was limited to 4 MB of internal flash memory, or about 2 hours of play, using a custom rechargeable battery pack. The unit had no display and rudimentary controls. It was a success during the holiday season, with sales exceeding expectations.
An MP3 player, often called a digital music player or portable audio player, is a handheld device that plays and stores audio and video files. The device is called an MP3 player because the digital format used most commonly on the device is called an MP3. This format quickly became the standard in audio file downloading and distribution in the late s and into the twenty-first century. Formed in , the group developed compression standards for all video data, including DVD movies, satellite broadcasting, and high-definition television. The MP technology allows the original audio file to be compressed to one-tenth its original size while still offering high quality sound.