9. The method of claim 1 , wherein collecting the statistics comprises identifying a quality value (Qmax) with a maximum occurrence in the text.
9. The method of claim 1 , wherein collecting the statistics comprises identifying a quality value (Qmax) with a maximum occurrence in the text. 10. The method of claim 9 , wherein a quality stream for each read included in the text is represented as an offset, a quality symbol, and a run length.