Quality Score Encoding
In FASTQ files, quality scores are encoded into a compact form, which uses only 1 byte per quality value. In this encoding, the quality score is represented as the character with an ASCII code equal to its value + 33. The following table demonstrates the relationship between the encoding character, its ASCII code, and the quality score represented.
Note
When Q-score binning is in use, the subset of Q-scores applied by the bins is displayed.
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