Jeon Jun Shik

Samsung ElectronicsMobile neXt Generation

Video Codec

Video Compress

Index

◈ Why

◈ How

◈ Where

Compress

Compress

1. To press or squeeze sth together or into a small space.

2. To reduce sth and fit it into a smaller space or amount of time.

3. (computing) to make computer files, etc. smaller so that they use less space on a disk, etc.

Why does it need?

1.S

2.S

1.Space

2.S

1.Space

2.Speed

These days…

•CD(700MB)•DVD(4GB) •Even… Hard Disk(200GB~300GB)

1GB = 1000MB

But,if we don’t compress

X 30 (frames)

Total = 5MBTotal = 1TB for 1 movieTotal = 9GB for 1 minTotal = 150MB for 1 sec

X 60 (seconds)

X 120 (minutes)

1.Space

2.Speed

◈ How

1.Spatial

2.Time

3.Redundancy

① ②

2. Time

3. Redundancy

In Digital World

0 or 1

0000011100101010001100011010101100001100101010101101100011100110101101010101001010101010101110101010101000111010110100010111011111100001101011101001100101010101010101101110101011101010111101011001011101011010101110100110101001010010110101010101010101010010101101010010100011101010010100101001010100101010100101010010101010010101010100101111

01110111111000011010

01110111111000011010

◈ Where

Engineer