[BC] FM Stereo invention

[Bob Tarsio]

Dennis:

Its: (L+R) + (L-R) = 2L the adder part of the matrix
     (L+R) - (L-R) = 2R the subtractor part of the matrix


Bob 
 
www.Broadcast-Devices.com
 

 -----Original Message-----
From: broadcast-bounces at radiolists.net
[mailto:broadcast-bounces at radiolists.net] On Behalf Of Dennis Cope
Sent: Monday, February 19, 2007 15:00
To: Broadcasters' Mailing List
Subject: RE: [BC] FM Stereo invention

It's just at the receive side the measurements I made (after the filtering)
I had 10 dB greater stereo separation.
I did this in the late 70's and the chip sets are much better now.  The
Matrix method back then was really bad in the lower cost receivers.
AFAIK the system was (L+R)-(L-R)= L & R.   Now I can't find my book....

Dennis
WESR, WCTG, NOAA


-----Original Message-----
From: broadcast-bounces at radiolists.net
[mailto:broadcast-bounces at radiolists.net]On Behalf Of WFIFeng at aol.com
Sent: Monday, February 19, 2007 13:14
To: broadcast at radiolists.net
Subject: Re: [BC] FM Stereo invention


In a message dated 02/19/2007 01:07:16 PM Eastern Standard Time,
dcope4 at verizon.net writes:

> In the lab I got much better stereo separation with the TDM method over
the
>  Matrix.  Especially in the receivers demux.  IMD and THD was also better.

You mean that the 38Khz chopped L/R alternate method is better?
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