[time-nuts] New Years Eve TV countdown
holrum at hotmail.com
Thu Jan 1 16:31:28 EST 2015
Also, ever since the infamous Janet Jackson "wardrobe malfunction" almost all live TV in the US is on a mandatory delay of several seconds so that offensive (?) images and language can be censored.
I have a DTV-PAL over-the-air DVR box (made by Dish/Channelmaster, long since discontinued). Earlier firmware versions chose one channel's PSIP data to use as its time source. If that channel was broadcasting bogo-time, all your recordings would be off. And the chance of bogo-time being broadcast is huge. They later changed the time algorithm to use a median of all the channels it sees. This gets the typical error to a few seconds.
They have a diagnostic screen that shows the PSIP time being broadcast by all the stations (actually the first 20 stations). Several stations have random times, some are off by +/- an hour, others are GMT. The stations that are close are typically +/- a minute or so.
More information about the time-nuts