Digital Communication

Binary, bits, bytes, pixels and how we can send send signals digitally.

Binary, Bits and Bytes

'Normal' numbers we use everyday are decimal numbers to base ten. Binary numbers are slightly different as they just use 1s and 0s. This means they are great for digital communication. In this video I explain these binary digits and how much information they can store.

OCR B and CIE

Image Processing

An image is made up on many picture elements. The value of each of these pixels can be changed to increase the brightness of the image, to alter the contrast, detect noise and for edge detecting.

OCR B

Digital Communications

Analogue signals can have any value, but when transmitted over long distances the signal degrades and cannot easily be reconstructed. Sending it digitally, with a stream of 1s and 0s, allows for a much higher quality form of communication. This video takes you through analogue-to-digital and digital-to-analogue conversion, as well as how this can be improved with a higher sampling rate.

OCR B and CIE

A Level Physics Online Recommended for Home Learning

The following organisations have recently recommended these resources to support students who are learning from home during the Covid-19 crisis.

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