Digital signal processing ( DSP ) operations can be performed in either fixed point or floating point precision.
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Consequently, all processing performed on Intel-based hardware will be performed at 16-, 32-or 64-bit integer precision, or 32-or 64-bit floating point precision regardless of the source format.
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The reason is that very often the matrices Q and the vectors z tend to be " numerically sparse ", meaning that they have many entries with values smaller than the floating point precision, allowing for " numerical deflation ", i . e . breaking the problem into uncoupled subproblems.
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