remaster

Short definition from Wiktionary

Verb

1. 1
   To produce a new version of a recording by remixing the original master recordings.
2. 2
   To create a new master copy by enhancing sound or picture quality of an older recording.
3. 3
   To produce a new version of a video game with updated graphics, often re-recorded music, and added features and content.

Noun

1. 1
   Synonym of remastering (“new version of a piece of media”).