KS3 Computing
CS12: understand how data of various types (including text, sounds and pictures) can be represented and manipulated digitally, in the form of binary digits
CS12: understand how data of various types (including text, sounds and pictures) can be represented and manipulated digitally, in the form of binary digits
| Keyword | Definition |
|---|---|
| analogue | a type of recording which hasn't been converted into binary 1s and 0s |
| ASCII | a way of represening text where each character in the American alphabet can be represented by a number less than 128 |
| binary | a way of representing data that only uses 1s and 0s, which computers can process easily as electronic on / off signals |
| bit | one binary digit (a single 1 or 0) |
| bitmap | a way of representing images by splitting them up into pixels. The colour of each pixel can be described by a number (black & white) or numbers (colour) |
| character | a single letter or digit that can be used ot make up words or text |
| digital | a type of recording which has been converted into binary 1s and 0s |
| file size | the number of bits, bytes, kilobytes or megabytes needed to store a file |
| picture | a type of data where each pixel or shape in a picture can be represented by a number |
| pixel | an individual coloured dot that makes up part of a bitmap image |
| sample | an individual measure of the volume of a sound recording at any moment in time |
| sound | a type of data where each sample of a recording of speech or music and be represented by a number |
| string | a type of data that consists of zero or more characters to describe text |
| text | a type of data where each character of a written message can be represented by a number |
| vector | a way of representing images by splitting them up into lines and shapes. Each colour and shape can be described by numbers or characters |
