Synthetic and SNHC audio in MPEG-4

摘要

In addition to its sophisticated audio-compression capabilities, MPEG-4 contains extensive functions supporting synthetic sound and the synthetic/natural hybrid coding of sound. We present an overview of the Structured Audio format, which allows efficient transmission and client-side synthesis of music and sound effects. We also provide an overview of the Text-to-Speech Interface, which standardizes a single format for communication with speech synthesizers. Finally, we present an overview of the AudioBIFS portion of the Binary Format for Scene Description, which allows the description of hybrid soundtracks, 3-D audio environments, and interactive audio programming. The tools provided for advanced audio functionality in MPEG-4 are a new and important addition to the world of audio standards.