MPEG-4 SLS

It was developed jointly by the Institute for Infocomm Research (I2R) and Fraunhofer, which commercializes its implementation of a limited subset of the standard under the name of HD-AAC.

New lossless audio coding technologies that need higher bandwidth and larger storage capacities may now be appropriate for many applications and have been gaining attention in recent years.

The CfP requested proposals for a lossless and scalable technology that was backward compatible with the existing MPEG AAC codec, and could operate efficiently at several different sampling rates and word length combinations.

Institute for Infocomm Research (I2R) technologies were adopted for the scalable to lossless coding (14496-3/AMD5) architecture Reference Model 0.

The scalability of the extension makes this combination a coding solution for production environments, where the result is to be transmitted to several recipients through channels of differing bandwidth.