Image Processing Reference
In-Depth Information
Figure 5-7 Line-based telecine object movement.
Progressive Scanning
Many of the problems with interlaced video go away completely when you use progres-
sive scanning. You must progressively scan at twice the normal film frame rate (or at the
field rate) to provide smooth motion. High-definition TV systems and computer displays
are designed around a progressive-scanning model. Figure 5-8 illustrates the progressive-
scanning line layout.
Picture Sizes and Formats
Television services transmit images of a markedly lower resolution than professional film
formats. The frame rates are higher and the delivery process is often more complex. This
is designed to reduce the transmission bandwidth.
Visible lines
Horizontal flyback lines
Vertical flyback
Figure 5-8 Progressive scanning pattern.
Search WWH ::

Custom Search