Efficient dataflow representation of MPEG-1 audio (layer III) decoder algorithm with controlled global states

We present an efficient dataflow representation of MPEG-1 Audio (Layer III) Decoder (MP3) algorithm with controlled global states. Although dataflow graph has been a successful representation language for DSP applications, lack of global states makes it unsuitable to some applications that require periodic parameter update and dynamic behavior of function blocks. We show the global states can solve these problems and be fused into dataflow graph without any side effect. With a real-life example such as MP3 decoder, we present the novelty and usefulness of our approach.