You could actually use the same LaserDisc source. Whoever at Lucasfilm did the transfer did not care, and did the most lazy, and pathetic transfer ever.

There are a number of people in this community doing LaserDisc captures. Since these people actually care about Star Wars, and the quality it is presented in, the captured video and audio is very good quality.

Though, the best LaserDisc set of Star Wars that is generally agreed upon is the 1986 widescreen release from Japan. The trilogy set is categorized as Star Wars: Japan Special Collection or known shorthand as JSC. It has the best detail, and is free from DNR, and a host of other problems that plague the 1993 "Definitive Collection" or known shorthand as "DC", of which this Gout DVD is sourced from. Though the JSC does not have the best color palette. The "DC" has better color.

Sorry for the long winded answer. The short answer is, it takes special care and technique to get a very clean, and proper LaserDisc capture. Something that Lucasfilm in 2006, did not do. :/