United States Patent 6,768,517 issued July 27, 2004 describes the plural PN1023 work of Patel-Limberg-McDonald. The invention flowed from acquaintances made thru opendtv. Al Limberg ----- Original Message ----- From: "Eory Frank-p22212" <Frank.Eory@xxxxxxxxxxxxx> To: <opendtv@xxxxxxxxxxxxx> Sent: Friday, July 23, 2004 6:49 PM Subject: [opendtv] Re: 20040722 Thundering Thursday Thanks (Mark's Monday Memo) > Doug's scheme, or more correctly the Patel-Limberg-McDonald scheme, was a brilliant attempt to fix the ATSC training signals in the least incompatible manner. They approached the problem in much the same way DVB-T did: make the DTV signal itself carry all the information necessary for a simple receiver to acquire and track the characteristics of the unknown RF channel. Unfortunately, the desire for backward compatibility seems to have precluded any real attempt to fix the deficiencies of the ATSC 8-VSB signal structure. > > So rather than putting the burden on the signal generator and keeping the receivers simple (i.e., cheap), we still have the situation where clever and probably very complex DSP hardware is required in the receiver to achieve results we can call "excellent." At least someone has finally done that. > > > -- Frank ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.