An audio virtual DSP for multimedia frameworks

The new MPEG-4 audio standard provides two toolsets for synthetic audio generation, audio processing and multimedia content description called Structured Audio (SA) and Binary Format for Scenes (BIFS). Moving from a systematic analysis of SA and from the implementation of an efficient SA decoder, this paper describes the design of a virtual DSP architecture able to exploit the data level parallelism contained in many typical audio processing algorithms. The proposed virtual DSP architecture shows good performance on general purpose platforms and can be easily adapted and optimized for parallel superscalar devices. The porting and results on a V-LIW DSP device confirm the effectiveness and flexibility of the approach, which is particularly suitable for standalone embedded solutions.