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Lecture-7 - Lecture-7 Video Compression Mubarak Shah 1 What...

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1 Lecture-7 Video Compression Mubarak Shah
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2 What is Compression? Compression is a process of converting data into a form requiring less space to store or less time to transmit, which permits the original data to be reconstructed with acceptable precision at a later time. Orange Juice Analogy! Freshly squeezed orange juice (uncompressed) Remove water (redundancy), convert it to concentrate (encoding) Shipped, stored, and sold. Add water to concentrate (decoding), tastes like freshly squeezed!!!
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3 Why is compression necessary? Storage space limitations Transmission bandwidth limitations. Resolution QCIF: 180 x 144 MPEG: 352 x 288 VGA: 640 x 480 NTSC 720x486 Workstation 1280x1024 HDTV: 1920 x 1080 35mm slide: 3072 x 2048
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