Jaggies is the informal name of an artifact caused by poor de-interlacing and/or scaling. Visually, jaggies look like jagged stair-steps where there should be a smooth diagonal line. The better the scaler, be in in a TV, Blu-ray player, or AV Receiver, the less noticeable the jaggies.

Notable scaling companies that do an excellent job minimizing jaggies are DVDO (Anchor Bay), Silicon Optix, Marvell, and Faroudja.

Check out a review of the DVDO Iscan.