Analog Video

* Two Raster Scans
Progressive Scan and Interlaced Scan

* Characterization of a Video Raster
- frame rate (frames/sec)
- line number (lines/frame)
These two parameters define the temporal and vertical sampling rates of a raster scan. From them, many other parameters could be derived, like line rate.
- image aspect ratio

* Retrace and Sync
Suppose fl is the line rate (lines/sec) and Tl is the line period. Note Tl includes the horizontal retrace time. Similarly, the frame period includes the vertical retrace time. Also within the H/V retrace durations, line/field/frame sync are added. Note the analog scanning signal uses inverse black/white voltage level.

* Analog Color TV System
- NTSC: 525 lines/frame; 29.97 frames/sec, 59.94 fields/sec; 4:3; YIQ; 6 MHz composite bandwidth.
- PAL: 625 lines/frame; 25 frames/sec, 50 fields/sec; 4:3; YUV; 8 MHz composite bandwidth.
Note the line number for these systems are not the active lines; they contain the vertical retrace periods. For NTSC, the active lines are 483/frame.