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The Process of Quantization and Error Characterizations 269<br />

1<br />

0.75<br />

x<br />

xhat<br />

0.5<br />

0.25<br />

xhat<br />

0<br />

−0.25<br />

−0.5<br />

−0.75<br />

FIGURE 6.26<br />

−1<br />

−1<br />

−0.75<br />

−0.5<br />

−0.25<br />

0<br />

x<br />

0.25<br />

0.5<br />

0.75<br />

Truncation error characteristics in the one’s-complement format<br />

1<br />

Clearly, x is more negative than Q T [x] orx ≤Q T [x] ore T ≥ 0. In fact,<br />

the maximum truncation error is<br />

e Tmax =000 ···0111 ···=2 −B (decimal)<br />

Hence<br />

0 ≤ e T ≤ 2 −B , for x

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