week5_09_27

week5_09_27 - IST 195 Week 5, Lecture 1 Bits and Bytes...

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IST 195 – Week 5, Lecture 1 – Bits and Bytes (Chapter 7) Professor Jeff Rubin
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09:01 IST 195 – Anatomy of an MP3 Professor Jeff Rubin recently.wav recently.mp3
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09:01 Give this a try at home… Total # of 16-bit samples: 522 sec * 44100 kHz * 2 channels = 46,040,400 0 10,000,000 20,000,000 30,000,000 40,000,000 50,000,000 60,000,000 70,000,000 80,000,000 90,000,000 100,000,000 Raw Audio (.wav) MP3 Storage Type Bytes 8-Bit Bytes Recently Converted file - WAV to MP3
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09:01 How did we get here? The file being converted was 8 minutes and 42 seconds of stereo music (522 seconds) CD quality audio has a sampling rate of 44.1 kHz sampling rate (16 bit DAC) – Digital Audio Conversion Total 16-bit samples: 522 * 44100 * 2 = 46,040,400 Total 8-bit bytes = 92,080,800 (87.8 MB) How Does the MP3 file Sound So Good? 8MB
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09:01 Let’s Not Forget Lossy Compression Our ears can detect  certain frequency’s and  certain patterns So let’s discard what  we cannot hear…. Frequencies are typically
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This note was uploaded on 11/18/2011 for the course IST 195 taught by Professor Staff during the Fall '08 term at Syracuse.

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week5_09_27 - IST 195 Week 5, Lecture 1 Bits and Bytes...

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