| Video | Other resources | ||
| 2.6.1 Units 2.6.1a bit, nibble, byte, kilobyte, megabyte, gigabyte, terabyte, petabyte 2.6.1.b how data needs to be converted into a binary format to be processed by a computer |
2.6.1 | ||
| 2.6.2 Numbers 2.6.2a how to convert positive denary whole numbers (0–255) into 8 bit binary numbers and vice versa 2.6.2b how to add two 8 bit binary integers and explain overflow errors which may occur 2.6.2c binary shifts 2.6.2d how to convert positive denary whole numbers (0–255) into 2 digit hexadecimal numbers and vice versa 2.6.2e how to convert from binary to hexadecimal equivalents and vice versa 2.6.2f check digits |
2.6.2a 2.6.2b 2.6.2c 2.6.2d 2.6.2f |
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| 2.6.3 Characters 2.6.3a the use of binary codes to represent characters 2.6.3b the term ‘character-set’ 2.6.3c the relationship between the number of bits per character in a character set and the number of characters which can be represented (for example ASCII, extended ASCII and Unicode) |
2.6.3 | ||
| 2.6.4 Images 2.6.4a how an image is represented as a series of pixels represented in binary 2.6.4b metadata included in the file 2.6.4c the effect of colour depth and resolution on the size of an image file |
2.6.4 | ||
| 2.6.5 Sound 2.6.5a how sound can be sampled and stored in digital form 2.6.5b how sampling intervals and other factors affect the size of a sound file and the quality of its playback 2.6.5c sample size 2.6.5d bit rate 2.6.5e sampling frequency |
2.6.5 | ||
| 2.6.6 Compression 2.6.6a need for compression 2.6.6b types of compression: lossy vs lossless |
2.6.6 |
