[supercat]

By the way, I never understood why color televisions use a frame rate of 29.970Hz. I know it's 3,579,545Hz/227.5/525, but why not use a colorburst of 3,583,125Hz? Or if that would be bad, 3,567,375 (using 226.5 chroma clocks per line)? What's magical about 3,579,545Hz?

[afraidfortherepublic]

Well, I sure can't explain it to you! LOL.

[Revolting cat!]

What's magical about 3,579,545Hz?

It's divisible by 17, everyone knows that! Some people!

[Myrddin]

By the way, I never understood why color televisions use a frame rate of 29.970Hz. I know it's 3,579,545Hz/227.5/525, but why not use a colorburst of 3,583,125Hz? Or if that would be bad, 3,567,375 (using 226.5 chroma clocks per line)? What's magical about 3,579,545Hz?

The answer lies in the 60 Hz AC line. The 30 frames per second / 60 fields per second was selected to avoid having a heterodyne beat causing a moving dark band across the screen. The chroma subcarrier value was constrained to work with the frame rate/line rate.

[Petronski]

Engineering by committee: NTSC (Never The Same Color . . . er . . . National Television Standards Committee)