compression.slides.printing

compression.slides.printing - Compression Compression CS...

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Compression Compression CS 450: Introduction to Digital Signal and Image Processing Bryan Morse BYU Computer Science
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Compression Introduction The Need for Compression Application Uncompressed Compressed Voice 64 Kbps 2-4 Kbps (8 ksamples/sec, 8 bits/sample) Audio conference 64 Kbps 16-64 Kbps (8 ksamples/s, 8 bits/sample) Digital Audio 1.5 Mbps 128 Kbps–1.5 Mbps (stereo, 44.1k samples/s, 16 bits/sample) Slow Motion Video 5.07 Mbps 8–16 kbps (10 fps, 176x120, 24 bits/pixel)
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Compression Introduction The Need for Compression Application Uncompressed Compressed Video Conference 30.41 Mbps 64-768 Kbps (15 fps, frame size 352x240, 24 bits/pixel) Video File Transfer 30.41 Mbps 384 Kbps (15 fps, frame size 352x240, 24 bits/pixel) Digital Video on CD-ROM 60.83 Mbps 1.5–4 Mbps (30 fps, frame size 352x240, 24 bits/pixel) Broadcast Video / DVD 248.83 Mbps 3–8 Mbps (30 fps, frame size 720x480, 24 bits/pixel) HDTV 1.33 Gbps 20 Mbps (59.94 fps, frame size 1280x720, 24 bits/pixel)
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Compression Introduction Coding I All information in digital form must be encoded somehow Examples: I Binary numbers I ASCII I IEEE floating-point standard I Coding can be I simple or complicated I lossless or lossy I efficient or inefficient I Compression is nothing but efficient coding
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Compression Information Theory Information I Information is something unknown. I More probabilistically, it is something unexpected . What’s the missing letter? H E L O Now, what do you think is missing? A Y A letter doesn’t always convey the same amount of information!
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Compression Information Theory Information vs. Data I Data: the actual bits, bytes, letters, numbers, etc. I
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compression.slides.printing - Compression Compression CS...

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