33:620:301 Lecture Notes - Lecture 9: Extended Ascii, Chrominance, Google Wallet

• School: Rutgers University
• Department: Management and Global Business
• Course: 33:620:301
• Professor: D Hamilton

Document Summary

Jpeg- humans sensitive to small changes in luminance but not chrominance: mp3- humans cannot hear very high or very low frequency sound, mpeg- jpeg-type compression is applied to each frame for compressing videos. Related technologies- ocr, voice to text, haptic devices. Sequence of 8 bits is called a byte. Instead of using long sequences-> use symbols: ex: bar codes, nato broadcast alphabet, additional encodings can help reduce decoding errors. Information describing information: ex: library book cataglogs, digital photos/folders, oxford english dictionary. *best way to use metadata is with tags. Rgb color scheme: three primary colors/ produce other colors by varying the intensities of rgb (red green blue) Intensity of a single pixel 3 bytes; one for each color: 0000 0000 -> smallest intensity; black, 1111 1111 -> largest intensity; white, rgb -> if all ones in the last row then it is blue. Color intensity is a byte- two groups of 4 bits.