The invention can optimize the trade off in transform coders between time resolution and frequency resolution by adaptively selecting the transform block length for each sampled audio segment, and can optimize {HEAD ~ coding gain} by adaptively selecting the transform and by adaptively selecting the analysis window or {TAIL ~ the analysis/synthesis window pair} 
The invention can optimize the trade off in transform coders between time resolution and frequency resolution by adaptively selecting the transform block length for each sampled audio segment , and can optimize { HEAD ~ coding gain } by adaptively selecting the transform and by adaptively selecting the analysis window or { TAIL ~ the analysis / synthesis window pair }
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