===== Quantization Precision Table ======
  * 0 - no data (1 level, just 0)
  * 1 - -1..1 (3 levels)
  * 2 - -2..2 (5 levels)
  * 3 - -3..3 (7 levels)
  * 4 - -5..5 (11 levels)
  * 5 - -7..7 (15 levels)
  * 6 - -15..15 (31 levels)
  * 7 - -31..31 (63 levels)