Hello Bill, RR for all.
>Am confused as in your MFSK16 help file it states "IMPORTANT: the >picture format is not fixed as in classical SSTV but can be anything. >The maximum dimensions of the transmitted picture are 1600x1200. >Multipsk proposes to use the standard "320x256" to take advantage of >the SSTV facilities and the stored SSTV pictures". MFSK16 SSTV is not a digimode. It is an analogical SSTV mode as Martin, Scottie... The principle is the same: the frequency determines the level of red, green or blue. It is independant from DigiSSTV. It is also much more rapid. DigiSSTV (of Multipsk) is a way to send pictures as a stream of bits. It is a protocol which organises the transmission of the picture information through a given digimode (PSK220F, PSK63F or Packet). Note: PSE there are chapters in the help about this. 73 Patrick ----- Original Message ----- From: Bill McLaughlin To: [email protected] Sent: Friday, December 15, 2006 3:27 AM Subject: [digitalradio] Re: DigiSSTV maps size Hello Patrick, hope all is well; Am confused as in your MFSK16 help file it states "IMPORTANT: the picture format is not fixed as in classical SSTV but can be anything. The maximum dimensions of the transmitted picture are 1600x1200. Multipsk proposes to use the standard "320x256" to take advantage of the SSTV facilities and the stored SSTV pictures". Am sure I am missing something here... Thanks in advance, 73, Bill N9DSJ --- In [email protected], "Patrick Lindecker" <[EMAIL PROTECTED]> wrote: > > Hello to all, > > If you do Digisstv transmission you must use very small pictures, for example the Mini_Map.BMP file (in the Multipsk package) which dimensions are 80x70 pixels. > To send this file, it will last: > * 1 mn 15 sec in Packet 1200, > * 3 mn 50 in Packet 300, > * 6 mn in PSK220F. > > It's not very rapid...this is due to the compression used. It's a Runlength algorithm which is applied line by line. The transform might be in two dimensions as in JPG to be more efficient, but this line transform permits to get the picture at any time (no block). > > PSE: in Packet, don't use "Immediate stop of the picture transmission". There is a bug on this button (fixed now). > > 73 > Patrick > > ----- Original Message ----- > From: Roger J. Buffington > To: [email protected] > Sent: Wednesday, December 13, 2006 3:54 PM > Subject: Re: [digitalradio] Re: Dec 15? > > > > I am gearing up for sending images via MFSK upon 12/15/06. What pixel > sizes are recommended for MFSK images? Been so many years since I did > it I no longer remember. > > de Roger W6VZV >
