Beyond CD-Quality: Advanced Audio Coding (AAC)for High Resolution Audio with 24 bit Resolution and96 kHz Sampling Frequency

摘要

Contrary to the MPEG-1 Audio compression schemes, Advanced Audio Coding (AAC) in its MPEG-2 and MPEG-4avours has no inherent upper limit for the sampling frequency of the input signal. Furthermore, the bitstreamformat allows to cover a dynamic range far beyond the range provided by 24 bit linear PCM coding. This makes theAAC coder an ideal candidate for representing audio signals with parameters that are usually associated with highresolution audio systems. This paper discusses the application of this highly ecient compression scheme to digitalprogramme material represented with 24 bit and 96 kHz.