Date post: | 26-Mar-2015 |
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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