EECS 1520 Chapter Notes - Chapter 2: Joint Photographic Experts Group, Hyper-Threading, Intel Turbo Boost

• School: York University
• Department: Electrical Engineering and Computer Science
• Course: EECS 1520
• Professor: John Hofbauer

Document Summary

D is for digital textbook summary: eecs 1520. Chapter 2: bits, bytes, and representation of information. Fundamentals of computers: computers are digital processors; they process discrete (separate) values, computes represent information with bits. A bit can be = to 0 or 1: groups of bits represent larger quantities. Only a limited number of possible values. On/off signal stored/transported/processed regardless of original source compressed by getting rid of redundant information. Merged with other data copied without error. Pixel: set of detectors that measure the amount of red, green and blue light. Music: mp3 reduced the size by a factor of 10 without any perceptible damage. Pictures: jpeg (joint photographic experts group) shrinks image by a factor of 10. Ex: (# of pixels wide) (#of pixels tall) Cache: temporary storage for recently accessed data; faster to access than main memory. Turbo boost: disabling unused cores, some additional power can be diverted to remaining cores, while still saving power overall.