Television Transmission Synchronization
An example of a lip synchronization problem, also known as lip sync error is the case in which television video and audio signals are transported via different facilities (e.g., a geosynchronous satellite radio link and a landline) that have significantly different delay times, respectively. In such cases it is necessary to delay the earlier of the two signals electronically.
Lip sync issues have become a serious problem for the television industry world wide. Lip sync problems are not only annoying, but can lead to subconscious viewer stress which in turn leads to viewer dislike of the television program they are watching. Television industry standards organizations have become involved in setting standards for lip sync errors.
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