Path: utzoo!attcan!sobmips!uunet!cs.utexas.edu!usc!apple!motcsd!hpda!hpcupt1!hprnd!hprmokg!barry
From: barry@hprmokg.HP.COM (Barry Fowler)
Newsgroups: sci.electronics
Subject: Re: Video 'Relay'?
Message-ID: <22630001@hprmokg.HP.COM>
Date: 16 Nov 89 00:05:19 GMT
References: <1757@bucket.UUCP>
Organization: HP Networked Computer Mfg. Operation
Lines: 6

Try looking at the Signetics TDA8440 Video and Audio Switch IC.

Page 11-46 of the Feb. 1987 Video Linear IC manual.

' Two video inputs, 4 audio inputs, switched to 2 audio out. and 1 video 
out.