CAS CS 101 Lecture Notes - Lecture 4: Ponomusic, Moving Picture Experts Group, Flac
17 Sep 2016
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9/15/16: conversion, movies, songs and pictures all have to be converted to binary for computers to use, must through go through analog to digital conversion (a/d converter) b. i. Computer chips do all this work: reverse works through a digital to analog conversion c. i. Works by spitting out the curve points at regular intervals c. i. 1. Then it gets rounded out by a filter: analog frequencies are fluid d. i. While digital are rigid: cd audio, a/d converter samples music at 44 thousand times per second so it"s very accurate, each sample is 16 bits" long b. i. Stereos have two streams, one for each side: a typical song is about 32 million bytes or 32 megabytes, compression, why compress a. i. Networks aren"t always really fast: types b. i. Lossless: can exactly recreate original version without any data loss b. ii. Lossy: loss of quality of files but much smaller files c.
