IEC 61937-6:2006 specifies the method for IEC 60958 to convey non-linear PCM bitstreams encoded in accordance with the MPEG-2 AAC (Advanced Audio Coding) and MPEG-4 AAC formats. This second edition of IEC 61937-6 cancels and replaces the first edition published in 2002. It contains the following significant technical changes:
- addition of data-type for MPEG2 AAC low sampling frequency;
- addition of data-type for MPEG-4 AAC.