Real-Time Implementation of HMM-Based Chord Estimation in Music Audio
Taemin Cho, Juan Pablo Bello · University of Michigan Library Repository · 2009
In this paper, we implement a real-time chord estimation system based on the hidden Markov model (HMM) using chroma features.HMMs, with the Viterbi decoding algorithm, have proven a powerful tool for chord recognition in polyphonic music signals.However, the direct application of the traditional, non-causal, decoding approach is not the optimal choice for real-time processing, with limited memory capabilities and no access to future observations.We propose a system of buffers and a modified decoding process that approximates offline results while minimizing the system's latency.