General Knowledge

Chapter 3: Other Information

lower picture quality because it uses

Dynamic range: Difference between

half the picture information of frame

the minimum reproducible audio

still, but is not accompanies with

signal and maximum reproducible

picture blur.

audio signal.

IPB display (DVD): With the MPEG2

 

which is one of the video display

 

methods of DVD, each picture is di-

 

vided into the following three pic-

 

ture types before being coded in digi-

 

tal signal.

 

I-picture (in-frame coding): This

 

is the standard video and can con-

 

stitute a picture by itself. As the high-

 

est picture quality can be obtained,

 

the still image of I-picture is most

 

suitable for use when adjusting the

 

picture quality.

 

P-picture (forward prediction

 

coding): Picture calculated based on

 

past pictures (I-picture or P-picture).

 

B-picture (bidirectional predic-

 

tion coding): Picture calculated by

 

comparing the previous and next

 

pictures (I-pictures or P-pictures).

 

This picture type contains least

 

amount of video information.

 

44