Theoretically the TV sound channel has the potential for extremely high quality, but many of the practical sources of impairment need to be understood. These impairments occur both at the transmitter (including the studio and/or network) and at the receiver (including any intervening signal processing such as antenna or cable TV chain, converter boxes, TV tuner, and intermediate-frequency strip). Most improvements must be treated as tradeoffs, that is, something must be sacrificed in order for something else to be gained. This is particularly true in the area of video-to-audio crosstalk in the transmitter and receiver and in the area of impulse-noise immunity. The sources of impairment and potential improvement are identified, with additional supporting theory covered in the references.
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