Mobile/PDA About Us Advertise here
User User name Password  
  Not registered yet? Register here.
Lost your password? Click here. 		 
  Home   News   Guides   Downloads   Glossary   Hardware   Profiles   Forums  
 Guides home     Submit your own guides!     DVD layer database     FAQ (beta)     Advertise at AfterDawn.com
Friday 5.12.2008 / 11:16 AM
Search:        In English   Suomeksi   På svenska
afterdawn.com > guides > Digital Video Fundamentals - Lossy Compression > Limitations (page 5/5)
Show topics
Guides and articles
Guides and articles

How Much To Compress

Ultimately the picture quality you're left with after lossy compression depend on which of these techniques you use, and how. Formats for distribution, like DVD, typically use all of them because they're not intended for editing. On the other hand, DV was designed with editing in mind, so every frame is an I frame. This means you can do anything you want with that frame, even remove it completely, and the surrounding frames won't be affected except for later frames having a different time code.

Bitrate Considerations

Other than format requirements for standalone players, the most important consideration for most encoding is bitrate. Bitrate determines that maximum quality you can get from a given format, and may sometimes be the determing factor in what format is appropriate. Final video size will always be constant for a given bitrate, but quality will vary by format and usually by specific encoder software or hardware. The same bitrate that would be acceptable for one format (1000kbps at 720x480 MPEG-4) might look horrible in another (1000kbps at 720x480 MPEG-2).


Version History

v1.0 2007.08.31 Original version by Rich Fiscus
v1.0.1 2007.11.16 Added links to additional DVF guides by Rich Fiscus
<< previous Groups of Pictures

table of contents

Created: 24 August 2007 Last updated: 17 November 2007

Digital video: AfterDawn.com | AfterDawn Forums | DVD X Copy Forums
Music: MP3Lizard.com
Gaming: Blasteroids.com | Blasteroids Forums
Software: Software downloads
Blogs: User profile pages
RSS feeds: AfterDawn.com News | Software updates | AfterDawn Forums
International: AfterDawn in Finnish | AfterDawn in Swedish | download.fi | fin.MP3Lizard.com
Navigate: Search | Site map
About us: About AfterDawn Ltd | Advertise on our sites | Rules, Restrictions, Legal disclaimer & Privacy policy
Contact us: Send feedback | Contact our media sales team
 
  © 1999-2008 by AfterDawn Ltd.