The chrominance subcarrier is a separate subcarrier signal that carries the color information during transmission of a composite video signal. It is

modulated In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the ''carrier signal'', with a separate signal called the ''modulation signal'' that typically contains informatio ...

and synchronized using the colorburst signal and then attached to the back porch of the signal. By synchronizing the subcarrier with the

local oscillator In electronics, a local oscillator (LO) is an electronic oscillator used with a mixer to change the frequency of a signal. This frequency conversion process, also called heterodyning, produces the sum and difference frequencies from the frequenc ...

of the television receiver, the

RGB The RGB color model is an additive color model in which the red, green and blue primary colors of light are added together in various ways to reproduce a broad array of colors. The name of the model comes from the initials of the three addi ...

colors can be decoded successfully.

References

Video signal {{tv-tech-stub