| Summary: | 碩士 === 國立臺灣科技大學 === 工程技術研究所 === 83 === This thesis is presenting a real-time video compression system.
In PC486DX2-66 VESA Local Bus, the video frame grabber converts
the video image signal from CCD Camera into digital video image
data. Then, through Motion Estimation Processor, Discrete
Cosine Transform Processor and Software Coding, the system can
real-time compress and code the digital video image data into
MPEG-I video file. Finally, storing the file into hard disk.
When picturing a quiet scene, quantizer scale setting as 31,
six P Picture behind one I Picture, this system currently can
record 23 picture (128*96 size, 256 gray level image) per
second. The compression ratio is about 114:1 among which I
Picture is about 32 times and P Picture is about 197 times.
When either the nature of picture or the setting of system
parameter changed, the compression ratio and the picture rate
will be different.
|
|---|
