Input+hardware+(Video)

Introduction
A video is just a collection of bit-mapped images that when played quickly one after another give the illusion of a moving image. In addition, video also commonly includes a sound track.

Digital video cameras (DV cameras) work in the same way as digital still cameras, but they capture a number of images every second. DV cameras have a built-in analog-digital convertor (ADC).
 * Digital Video Camera**

Webcams are essentially low-end DV cameras which capture video a with lower resolution.
 * Webcams**

Like digital still cameras, digital video cameras and webcams also use light sensors known as Charged Couple Devices (CCDs).
 * CCDs**

In order to capture and process video on a computer, a video capture card is required. This card takes as input a video stream and uses an analog-digital convertor (ADC) to convert to digital format.
 * Video Capture Card**

**DSP** A Digital Signal Processor uses hardware to capture and encode the data to a compressed format e.g. MPEG

Task
Copy and complete this table highlighting the specifications of DV cameras.

Task
Draw a diagram which shows how video is captured with a DV camera, and transferred to a computer. Your diagram should show:
 * DV camera
 * CCD
 * Computer
 * Video capture card
 * ADC
 * DSP