1. Ms Jennifer - Senior 4 - Data Representation Introduction
Computer Logic

2. 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

3. 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

4. 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

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

6. 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.

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

8. 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.

9. 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.

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

11. 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