[WillPS]

"Remastering" is such a generic and meaningless phrase which can mean loads of things. it doesn't even have to mean something has had any attempts to improve the quality, literally just transferring from one format to another is technically "remastering", which is why it's pretty dubious many of the times it's claimed something's been remastered, far too often the "remastered" version can be worse than it was before. It's a word that's used to give an impression things have been changed or improved, but it doesn't have to mean that.

Wikipedia disagrees: Remaster - Wikipedia

Improvement is subjective.