Datasheet

Jon Waddington

Interlaced video means that two fields of alternate lines are drawn and interleaved to

show a single frame. This means that there are two blanking intervals for every frame

which is displayed. Interlaced scanning reduces flicker by appearing to double the frame

rate from 25 frames per second to 50 frames per second [27].

Composite video is a video standard which contains luminance (Y) and chrominance (U

and V) to display colour video. The Horizontal and Vertical syncs are superimposed on

the same signal as the picture information.

Composite video comprises of two parts, the luminance and chrominance. The luminance

(Y) contains the black and white (brightness) information of the video and the

chrominance (U and V) contains the colour information. Colour is represented by

4.43MHz signals with different phases and at different amplitudes. The amplitude

represents the amount of colour (saturation) and the phase represents the tint of the

colour (hue) [25].

Figure 3.2.2 Vertical Blanking Waveform

Equalizing pulses

Broad pulses