club_med
04-26-2001, 04:04 AM
This is pretty cool i must say.
Have more MP3s than room on your hard drive? Help is on the way. After more than 10 years, the MP3 format is being upgraded. Dubbed mp3Pro, it will compress music files to half the size of current CD-quality MP3, from 128Kbps to 64Kbps, without compromising sound quality. For you, that means downloads at twice the speed.
The mp3Pro standard is a tweak on existing MP3 technology. The sound is cut into multiple frequency bands, just like with a regular MP3 track. The bands that humans can’t hear — for example, extremely high- and low-pitched sounds — are eliminated, saving space. mp3Pro then takes it a step further, improving on the old standard with a process called Sub-Band Replication. When an mp3Pro file is decoded, SBR replaces some of the high- frequency bands lost during compression. This way, more frequencies can be eliminated during compression while maintaining sound quality.
Players built to decode mp3Pro files will be able to handle existing MP3s. And mp3Pro files will play back in old MP3 players, though the lost frequencies won’t be replaced, so you’ll hear 64Kbps, or AM-radio quality, sound. Look for the first mp3Pro jukebox software this May, and portable players this fall.
-- Michael Moyer, April 2001
source: Article at Popular Science (http://www.popsci.com/electronics/news/010406.e.html)
cm.
Have more MP3s than room on your hard drive? Help is on the way. After more than 10 years, the MP3 format is being upgraded. Dubbed mp3Pro, it will compress music files to half the size of current CD-quality MP3, from 128Kbps to 64Kbps, without compromising sound quality. For you, that means downloads at twice the speed.
The mp3Pro standard is a tweak on existing MP3 technology. The sound is cut into multiple frequency bands, just like with a regular MP3 track. The bands that humans can’t hear — for example, extremely high- and low-pitched sounds — are eliminated, saving space. mp3Pro then takes it a step further, improving on the old standard with a process called Sub-Band Replication. When an mp3Pro file is decoded, SBR replaces some of the high- frequency bands lost during compression. This way, more frequencies can be eliminated during compression while maintaining sound quality.
Players built to decode mp3Pro files will be able to handle existing MP3s. And mp3Pro files will play back in old MP3 players, though the lost frequencies won’t be replaced, so you’ll hear 64Kbps, or AM-radio quality, sound. Look for the first mp3Pro jukebox software this May, and portable players this fall.
-- Michael Moyer, April 2001
source: Article at Popular Science (http://www.popsci.com/electronics/news/010406.e.html)
cm.