Appendix: Glossary Of Terms - Kedacom IPC Series User Manual

6.

Appendix: Glossary of Terms

Term
720P
CIF
QCIF
ROI
Key Frame
Interval
Quantization
Explanation
Resolution of 1280*720 pixels
Resolution of 352*288 pixels
Resolution of 176*144 pixels
Region Of Interest
Key Frame defines the important frame when change
happens in a video. This frame will be completely
encoded. Key Frame Interval defines the maximum frames
during the interval between key frames. If the video
changes quite frequently, shorter Key Frame Interval will
make video more real, but it will take more bandwidth.
Set Min. and Max. Quantization, and image compression
quantization will fluctuate in the range.
During image compression, larger quantization brings
higher compression ratio and higher distortion ratio. On
the contrary, smaller
compression ratio and better image recovery, but
meanwhile takes more bandwidth.
quantization brings lower