[QuadList] Jan. 21, 1959 Kraft Music Hall--In Color on N-B-C

[Dennis Degan]

>              I expanded:
>
>      Tony, in the US, television networks used the national  
> telephone company AT&T almost exclusively to distribute their  
> programming into the early 1980's when satellite distribution was  
> introduced.  Until 1977, the old 'Telco' distribution system  
> maintained audio and video as separate parallel feeds.  This  
> required constant monitoring along the various paths to ensure that  
> audio and video remained in sync with each other.

		On Mar 24, 2011, at 5:12 PM, Tony Quinn wrote:

 > As it did in the UK, all circuits were GPO (General Post Office -  
the national provider of telephony). By 1979-ish SiS (Sound In Syncs)  
was common.
	<http://en.wikipedia.org/wiki/Sound-in-Syncs>

		I now say:

	The idea was the same but the method was a bit different.

		I previously said:

> In 1977, AT&T improved the video service so that it was  capable of  
> carrying a wider bandwidth than before.  Wider bandwidth  systems  
> allowed for audio subcarriers to be transmitted along with the   
> video, thereby providing for the first time a single system for  
> both  video and audio.

		Tony said:

 > The US seems way behind the curve here ...... In 1980, when I  
joined the industry, DSiS (Dual SiS - for stereo or dual mono) was  
certainly common.
NICAM at a broadcast (as opposed to inhouse) technique wasn't far away  
at that point

		I say:

	I don't know how you figure the US was behind at the time.  Stereo TV  
broadcasting was not standardized until 1984.  Even so, the multiplex  
audio system was equipped for stereo from the start, in 1977.  By  
1980, it was common though broadcasting stereo was not yet allowed.   
Some TV stations and specific programs got around this by simulcasting  
stereo audio on local FM radio.

			Dennis Degan, Video Editor-Consultant-Knowledge Bank
	  					NBC Today Show, New York