Original sentence: Double-blind tests have generally found other versions of ATRAC to be inferior to most modern codecs (MP3, AAC, Vorbis), raising even more doubt about the validity of Sony's ATRAC3plus claims.However, this testing may have been biased in the choice of test material.The latest version, ATRAC3plus, gives FM quality at 64 Kbit/s, and CD quality at 256 Kbit/s.This leaves the user in something of a quandry as to which bitrate to use for near CD quality - the 64 Kbit/s rate does not provide the quality of a mp3 at 128 Kbit/s, the 256 Kbit/s bit rate uses a lot of space, and the 132 Kbit/s rate uses the previous, and less efficient, version of ATRAC.Unfortunately -- and this is a serious problem for Sony -- it means that ATRAC does not use less space than mp3s when one wants to record at near CD quality
Edited sentence: Apple's iPod).Generally speaking, the ATRAC3plus codec offer double efficiency over MP3.It is totally because its development is based on a combination of top level software and IC(Or DSP) designer, who can find a way to perfectly match up the software algorithm and actual hardware implementation.That means it can offer similar quality to 128kbps mp3 at just 64kbps mp3, which makes Sony's ATRAC3plus based Walkman a purely advantage over rival's product (e.The ATRAC3plus gives near CD quality at 64 Kbit/s, and CD quality at 256 Kbit/s.The latest version, ATRAC3plus, regarded as the finest lossy audio codec at the moment.Therefore, the ATRAC based device demonstrate higher quality audio playback, as well as lower power consumption compare to mp3 and ACC devices