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MPEG Audio News

At the 78^th meeting WG11 issued a Draft Call for Proposals on Spatial Audio Object Coding. This calls for technology to support use cases for personalized audio, interactive gaming, and teleconferencing.

The envisioned architecture for the technology reuses the MPEG Surround technology, and augments it to support bitrate-efficient object-based coding of multiple sound sources. The envisioned decoder allows for interactive positioning of objects in the sound stage and binaural rendering or adaptation to users’ loudspeaker setups.

The Final Call will be issued at the 79^th meeting in January 2007 and evaluation of proposals will be conducted at the 80^th meeting in April 2007.

MPEG Audio News

At the Klagenfurt meeting MPEG Surround completed its technical work. MPEG Surround (ISO/IEC 23003-1) enables a means of coding multi-channel audio that is backwards compatible with legacy stereo systems at bit rates comparable to those currently used by digital stereo music services. MPEG Surround can be used with existing stereo systems because MPEG Surround typically codes its input as a compressed stereo signal plus spatial side data. The standard supports a wide range of operating points for its spatial information in a range from zero up to those approaching transparent quality. MPEG Surround is another case of MPEG responding to industry demands for supporting the wide range of audio devices and equipment that consumers buy and already possess.

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