Coding Technologies, Matsushita Electric Industrial (Panasonic) and NEC have introduced a new low-power decoder version for the upcoming MPEG-4 aacPlus standard, which achieves CD-quality audio at low bitrates.
aacPlus is the combination of MPEG AAC and Coding Technologies’ SBR (Spectral Band Replication) technology. SBR is a bandwidth extension technique, which enables audio codecs to deliver the same quality at half the bit rate. As a result, aacPlus can deliver CD-quality stereo at 48 kbit/sec.
‘The work of Panasonic, NEC and Coding Technologies has significantly increased the reach of aacPlus,’ said Martin Dietz, President and CEO of Coding Technologies. ‘Although processor power is increasing rapidly, power consumption is still a key factor in mobile markets. The efficiency afforded by low-power aacPlus will give an early boost to the new standard.’
Technology and intellectual property for low-power SBR was contributed by all three companies. Coding Technologies is the licensing agent for low-power SBR in aacPlus, creating a one-stop-shop for SBR patents and software in MPEG-4.