Compression

Today in Sound and Vision we learned about compression and its advantages/disadvantages.



We learned here are some of the things which were covered in the lesson .

• Gamma Settings (which are colour settings) Computers use 2.0 and Macs use 1.8 (Although these setteings can be adjusted to whichever maching your working on) .

• The uses of field stripping

• European Televisions operate in DV PAL which is 25 FPS 

• US Televisions operate in NTSC which is 29FPS

• Television Footage needs to be Interlaced 

• VDU Footage needs to be Deinterlaced  

• When working with DVDs there are regions Europe uses Region 2 and US uses Region 1

• The most compatible blank discs are DVD-R format discs 

Interlation is vital if your viewing a VDU with interlaced footage then you will not get the best quality picture if dinterlaced footage is being played on a Television the same will apply. The picture quality will appear jumpy during scenes with motion.

The picture below shows two images from a television. One has been deinterlaced and one has not notice that one image is more visible and one image is slightly blured.