Ms Jennifer - Senior 4 - Data Representation Introduction Computer Logic 1010101101

A computer understands in terms of 1’s and 0’s Ms Jennifer - Senior 4 - Data Representation Introduction A computer understands in terms of 1’s and 0’s These 2 digits are called binary digits Each digit represents a bit Therefore one bit = one binary digit: 1 or 0

How does the computer interprets the data we send to the it? Analogue to Digital signal How does the computer interprets the data we send to the it? Ms Jennifer - Senior 4 - Data Representation Introduction

Ms Jennifer - Senior 4 - Data Representation Introduction Some examples of digital media converters We speak through the microphone (we input analogue signals) The microphone converts the analogue signal to digital bits of data which are transferred to the speakers Speakers convert digital music back to the original analogue signal

Ms Jennifer - Senior 4 - Data Representation Introduction Analogue to Digital signal

Ms Jennifer - Senior 4 - Data Representation Introduction Video Digitiser A Video Digitiser is an example of an Analogue to Digital converter which captures an analogue video still image and converts it to a digital image form.

Ms Jennifer - Senior 4 - Data Representation Introduction Digital to Analogue signal DAC

Ms Jennifer - Senior 4 - Data Representation Introduction MIDI Instruments MIDI instruments are used to synthesize musical data in digital form. DAC – Digital to analogue converters are used to convert the MIDI music into analogue data.

Voice recognition systems Ms Jennifer - Senior 4 - Data Representation Introduction Voice recognition systems Voice recognition systems measure and analyse the voice with pitch, frequencies and amplitudes and match it with a saved voice in the system.

Ms Jennifer - Senior 4 - Data Representation Introduction Analogue to Digital signal 1 TRANSMITTER RECEIVER Ms Jennifer - Senior 4 - Data Representation Introduction

Units of Storage Order starting with smallest unit: B-B-K-M-G-T BIT BYTE KILOBYTE MEGABYTE GIGABYTE TERABYTE Ms Jennifer - Senior 4 - Data Representation Introduction