Other typical details: Complex elaborations of the basic ideas
		• HMM states ← triphones ← words – each triphone → 3-5 states + connection pattern – phone sequence from pronuncing dictionary – clustering for estimation • Acoustic features – RASTA-PLP etc. – Vocal tract length normalization, speaker clustering • Output pdf for each state as mixture of gaussians • Language model as N-gram model over words – recency/topic effects • Empirical weighting of language vs. acoustic models • etc. etc.