Unconditional Bases and Bit-Level Compression
David L. Donoho · Applied and Computational Harmonic Analysis · 1996
A previous article [2] gave results showing that an orthogonal basis which is an unconditional basis for a functional class F furnishes an optimal representation of elements of F for certain de-noising and compression tasks. Since publication of that article, the author received several queries which pointed out that the definition of compression in that article was