User User name Password  
   
Saturday 5.7.2008 / 08:11 PM
Search:        In English   Suomeksi   På svenska
afterdawn.com > glossary > I Frame
Show topics
Glossary
Glossary

I Frame

In an MPEG video stream, an I Frame is a Full Frame. This Frame does not need any information from the frame before it or after it to be played back properly.

While most of the time each I frame is the beginning of a new GOP, in some cases GOPs can contain multiple I frames. This is rare, and only done to reduce the number of GOP headers written. Since the size of GOP headers is usually minimal compared to the video this isn't a common practice, especially since most standard video formats place limits on the size of a GOP.


Related Guides


Digital Video Fundamentals - MPEG-2 Encoding

Digital Video Fundamentals - Lossy Compression

HC Encoder Settings

Deciphering CCE Basic

TMPGEnc 4 - MPEG-2 and MPEG-1 Video Settings


For more information, see the glossary definitions for:

Delta Frame Key Frame MPEG-1 MPEG-2 MPEG-4 P-frame VC-1
 Post your comment
Comment this glossary entry!
ruygrok 8 May, 2007 5:45 Send private message to this user  
It may be usefull to add in the G section an explanation of the GOP (Group of Pictures)method concerning a.o.the mpeg 2 compression system, employing I,P and B frames (see e.g TPMGEnc)
 Post your comment
Select a term to see the explanation