What does "MP3 are over"?30 years of technology that changed the way of listening to music
データサイズを2桁削減、デジタル家電時代を拓いた功労者
The name of MP3 will be familiar to many people as the "music data name".What does it mean that the provision of the software licensed will not do the patent license holder, Fraunforfer?In the first place, what does "providing a patent license end"?
全ての画像を見る（2枚）MP3, accurately, is a technology called "MPEG-1 Audio Rayer 3" is a technology jointly developed by Friedrich Alexander University and Fraunfurfers in 1987.The feature is that using the "acoustic psychology model" to cut from the sounds of areas that are hard to feel for human ears, the listener is a sense of incongruity while dramatically reducing the amount of data of the sound.There is a technique that is indispensable.The CD (that is, non -compression), which was about 50MB per minute, was reduced to 1/50, to 1/50, but it did not sound extremely deteriorated.
The value of 50MB per minute in non -compression is now not particularly heavy.But 25 years ago it was too huge data.The main memory of the PC is only megabytes.The Internet at that time was "before the broadband."It was finally transferred to dozen kilometers per seconds (bits per second).In an era where only two -digit devices existed, it was extremely difficult to handle music data.It was difficult for individuals to handle, and the easiest way to distribute the CD medium was the easiest way.
▼参考・1MB（メガバイト）＝1,000KB（キロバイト）＝1,000,000 Byte（バイト）・1バイト＝8ビットHowever, the appearance of MP3, which could be easily made into one -50th, and had less sound deterioration, had the power to solve these difficulties at once.
The spread after that is as you know."MP3 Player" swept the world, Apple created an "iPod", and its success led to the iPhone.
In fact, the technology to reduce sound data in similar methods is more than MP3 at the same time, one of which is "ATRAC", which was also used in the MD.However, many people could use it casually on a PC, a lot of product variations, and high degree of freedom, as a result, the home appliance manufacturer was defeated by the "MP3 flow."
Currently, CDs are still selling in Japan, but music is already "online distribution" in digital data.It was MP3 that built the foundation.
