What does fidelity mean?

You are correct!

From our dictionary:

fi•del•i•ty

Pronunciation: (fi-del'i-tE, fI-), [key]
n.,
pl. -ties.
1. strict observance of promises, duties, etc.: a servant's fidelity.
2. loyalty: fidelity to one's country.
3. conjugal faithfulness.
4. adherence to fact or detail.
5. accuracy; exactness: The speech was transcribed with great fidelity.
6. Audio., Video.the degree of accuracy with which sound or images are recorded or reproduced.