Text, Sound and Images Assessment

Independent transfer — Text, Sound and Images. Change one meaningful feature of this lesson case, then solve and check the revised problem: Explain the mechanism, relationship, decision, or calculation in this lesson-specific case from “Representing Text”: container Character sets teal An agreed list of characters , each represented by a unique binary code . Every character a computer stores — letters, digits, punctuation, spaces — is held as a number , and that number is stored in binary. The character set is what decides which number means which character. The agreement is essential. If one computer stored $65$ for 'A' and another used $65$ for something else, text would be unreadable when transferred. A… Your variation must still address “Understand how and why a computer represents text, and the use of character sets including ASCII and Unicode.”.

Representation practice — Text, Sound and Images. Create a labelled diagram, graph, table, model, flowchart, equation layout, or annotated explanation that makes the reasoning in this case visible: Explain the mechanism, relationship, decision, or calculation in this lesson-specific case from “ASCII and Unicode”: table ASCII compared with Unicode header-row ASCII Unicode Bits per character 7 (often stored in 8) 16 or more Number of characters 128 Over a million Covers English letters, digits, punctuation, control codes Most of the world's writing systems , plus symbols and emoji File size Smaller Larger — more bits per character Suitable for English-only text International text container Why Unicode was needed violet ASCII uses 7 bits , so it can represent…