Computer Science 9608: Information Representation Topical Past Paper Questions

(a) Describe how run-length encoding (RLE) can be used to compress a single video frame. [4] (b) Identify two other methods of compressing a single video frame. 1 2 [2]

Wilbur uses vector graphics to create a logo for his company. (a) Describe how the logo is represented and encoded by the computer. (b) Wilbur scans a hand drawn image. The scanned image uses 8 bits to store the colour for each pixel. The image is 2048 pixels wide by 1024 pixels…

(a) Convert the unsigned binary number 0101 1111 1100 into denary. [1] (b) Convert the denary number -239 into 12-bit two's complement. [1] (c) Convert the two's complement number 0110 0101 into denary. [1] (d) Convert the Binary Coded Decimal (BCD) value 0110 0101 into denary. […