
Definitions
Letterbox screen
This refers to a screen on which the playback picture of 
Pan & Scan screen
This refers to a screen on which the playback picture of 
Title, Chapter (DVD)
DVDs are divided into some large sections (titles) or some small sections (chapters). Each section is numbered: these numbers are called "Title number" or "Chapter number".
Title 1  | Title 2  | 
Chapter1  | Chapter 1  | 
Chapter2  | 
  | 
……  | ……  | 
  | 
  | 
Track (CD) | 
  | 
CDs are divided into some sections (tracks). Each section is numbered; these numbers are called "Track number".
Track 1  | Track 2  | Track 3  | ……  | 
JPEG
JPEG is a common picture format that has small file size and low quality loss rate of picture. Hundreds of pictures can be stored in a disc in this format. In order to utilize real digital album, use film to make a "PICTURE CD" in JPEG format.
34