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