Video Compression

Question 1

What is video compression

Answer 1

Video compression is the use of computational algorithms to reduce the amount of data needed to convey the visual information in a video file.

Question 2

Common video compression algorithm

Answer 2

1. JPEG (10:1)
2. MPEG
3. H.264 (most commonly used today. 200:1)

Question 3

How video compression works

Answer 3

1. Shrink the dimension
2. Lower pixel resolution
3. Repeat similar image

Video compression works both by reducing the amount of data in individual frames, called intraframe coding, and by reducing data across several frames, called interframe coding.

Question 4

What is interframe coding

Answer 4

Interframe coding records how frames change instead of storing each frame completely.

we only need to fully store the first frame. Following frames can be predicted by the algorithm based on similarities between themselves and the previous frame