[digitalradio] Redefining SSTV operations: SSTV_IN_MFSK16_EASY_WITH_MULTIPSK
For information, here is the good address (the first had an extra-space)... 73 Patrick - Original Message - From: David Carter To: [EMAIL PROTECTED] Sent: Thursday, January 24, 2008 11:58 PM Subject: Re: [multipsk] Redefining SSTV operations: SSTV_IN_MFSK16_EASY_WITH_MULTIPSK Try http://f6cte.free.fr/SSTV_IN_MFSK16_EASY_WITH_MULTIPSK.doc There were some extra spaces in the original. 73 Dave Carter KA1HDG From: Gary Kohtala [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] Date: Thu, 24 Jan 2008 14:31:46 -0800 (PST) To: [EMAIL PROTECTED] Subject: Re: [multipsk] Redefining SSTV operations: SSTV_IN_MFSK16_EASY_WITH_MULTIPSK Patrick, That link does not work. Best regards, Gary, K7EK - Original Message From: Patrick Lindecker [EMAIL PROTECTED] To: digitalradio@yahoogroups.com Cc: [EMAIL PROTECTED] Sent: Thursday, January 24, 2008 10:19:03 AM Subject: [multipsk] Redefining SSTV operations: SSTV_IN_MFSK16_EASY_WITH_MULTIPSK Hello Leigh and all, For the ones interested, I've done a Word document which goal is to show from two Multipsk snapshots how to do the basic operations in SSTV in MFSK16. This document (0.5 Mo) is available from my site site http://f6cte. free.fr/SSTV_ http://free.fr/SSTV_ IN_MFSK16_ EASY_WITH_ MULTIPSK. doc (copy and paste this adress in Internet Explorer (or equivalent) Net adress field). It is based on the 4.7 version not yet released, but it changes almost nothing. 73 Patrick - Original Message - From: Leigh L Klotz, Jr. mailto:[EMAIL PROTECTED] To: digitalradio@ yahoogroups. com mailto:digitalradio@yahoogroups.com Sent: Thursday, January 24, 2008 1:38 AM Subject: Re: [digitalradio] Re: Redefining SSTV operations Yes. I still think a menu item or a button for send picture would be inviting to users. QRG I will leave it to Andy as he brought up the topic of center of activity. Leigh/WA5ZNU On Wed, 23 Jan 2008 1:07 pm, Patrick Lindecker wrote: Hello Leigh, So, I propose simply making it more easily accessible, for example, by making it available on a main menu, or even as its own mode. In I understand. In fact the solution would be to do a three pages document MFSK-SSTV easy with Multipsk in the same way as I do with ALE. dialog box for image types, and in the case of MultiPSK and PocketDigi, it would send the RSID for MFSK. It is sure very comfortable to receive a RS ID as the tuning is immediatly perfect. But you would need a specific QRG for these pictures... 73 Patrick - Original Message - From: Leigh L Klotz, Jr. To: digitalradio@ yahoogroups. com mailto:digitalradio%40yahoogroups.com Sent: Wednesday, January 23, 2008 8:17 PM Subject: Re: [digitalradio] Re: Redefining SSTV operations Patrick, Yes, but MultiPSK and DRM780 and fldigi and other programs already support MFSK and other modes. My point is that few know about MFSK picture mode, even though it is implemented in many programs, because it is accessible only when in MFSK mode and is hard to find. So, I propose simply making it more easily accessible, for example, by making it available on a main menu, or even as its own mode. In reality, it would simply be MFSK and would start with the Open File dialog box for image types, and in the case of MultiPSK and PocketDigi, it would send the RSID for MFSK. Leigh/WA5ZNU On Tue, 22 Jan 2008 12:48 pm, Patrick Lindecker wrote: Hello Leigh, RR for all. is mostly a UI thing, allowing people in Olivia or some other mode of about the same bandwidth to initiate an MFSK picture transmission Yes but it would need a MFSK decoder (to decode the SSTV prefix) plus the Olivia decoder. It would be better to do MFSK16 (+MFSK SSTV) only. 73 Patrick - Original Message - From: Leigh L Klotz, Jr. To: digitalradio@ yahoogroups. com mailto:digitalradio%40yahoogroups.com Sent: Monday, January 21, 2008 10:16 PM Subject: Re: [digitalradio] Re: Redefining SSTV operations Right, ypu need the size, not just the fact that it is the mode. However, if you just use the MFSK code and then send the size info in MFSK, it would be 100% compatible with existing implementations. So, it is mostly a UI thing, allowing people in Olivia or some other mode of about the same bandwidth to initiate an MFSK picture transmission without the cognitive overhead of switching to MFSK. PSK users probably wouldn't want to do this unless there is enough clear bandwidth available. 73, Leigh/WA5ZNU On Mon, 21 Jan 2008 10:54 am, Patrick Lindecker wrote: Hello Leigh, RSID is now
[digitalradio] Redefining SSTV operations: SSTV_IN_MFSK16_EASY_WITH_MULTIPSK
Hello Leigh and all, For the ones interested, I've done a Word document which goal is to show from two Multipsk snapshots how to do the basic operations in SSTV in MFSK16. This document (0.5 Mo) is available from my site site http://f6cte.free.fr/SSTV_IN_MFSK16_EASY_WITH_MULTIPSK.doc; (copy and paste this adress in Internet Explorer (or equivalent) Net adress field). It is based on the 4.7 version not yet released, but it changes almost nothing. 73 Patrick - Original Message - From: Leigh L Klotz, Jr. To: digitalradio@yahoogroups.com Sent: Thursday, January 24, 2008 1:38 AM Subject: Re: [digitalradio] Re: Redefining SSTV operations Yes. I still think a menu item or a button for send picture would be inviting to users. QRG I will leave it to Andy as he brought up the topic of center of activity. Leigh/WA5ZNU On Wed, 23 Jan 2008 1:07 pm, Patrick Lindecker wrote: Hello Leigh, So, I propose simply making it more easily accessible, for example, by making it available on a main menu, or even as its own mode. In I understand. In fact the solution would be to do a three pages document MFSK-SSTV easy with Multipsk in the same way as I do with ALE. dialog box for image types, and in the case of MultiPSK and PocketDigi, it would send the RSID for MFSK. It is sure very comfortable to receive a RS ID as the tuning is immediatly perfect. But you would need a specific QRG for these pictures... 73 Patrick - Original Message - From: Leigh L Klotz, Jr. To: digitalradio@yahoogroups.com Sent: Wednesday, January 23, 2008 8:17 PM Subject: Re: [digitalradio] Re: Redefining SSTV operations Patrick, Yes, but MultiPSK and DRM780 and fldigi and other programs already support MFSK and other modes. My point is that few know about MFSK picture mode, even though it is implemented in many programs, because it is accessible only when in MFSK mode and is hard to find. So, I propose simply making it more easily accessible, for example, by making it available on a main menu, or even as its own mode. In reality, it would simply be MFSK and would start with the Open File dialog box for image types, and in the case of MultiPSK and PocketDigi, it would send the RSID for MFSK. Leigh/WA5ZNU On Tue, 22 Jan 2008 12:48 pm, Patrick Lindecker wrote: Hello Leigh, RR for all. is mostly a UI thing, allowing people in Olivia or some other mode of about the same bandwidth to initiate an MFSK picture transmission Yes but it would need a MFSK decoder (to decode the SSTV prefix) plus the Olivia decoder. It would be better to do MFSK16 (+MFSK SSTV) only. 73 Patrick - Original Message - From: Leigh L Klotz, Jr. To: digitalradio@yahoogroups.com Sent: Monday, January 21, 2008 10:16 PM Subject: Re: [digitalradio] Re: Redefining SSTV operations Right, ypu need the size, not just the fact that it is the mode. However, if you just use the MFSK code and then send the size info in MFSK, it would be 100% compatible with existing implementations. So, it is mostly a UI thing, allowing people in Olivia or some other mode of about the same bandwidth to initiate an MFSK picture transmission without the cognitive overhead of switching to MFSK. PSK users probably wouldn't want to do this unless there is enough clear bandwidth available. 73, Leigh/WA5ZNU On Mon, 21 Jan 2008 10:54 am, Patrick Lindecker wrote: Hello Leigh, RSID is now available in open source C++ pocketdigi so I suspect it will RSID define modes and has a limited number of combinations available. Here you would need perhaps 24 bits to define all the information needed. So a more classical (hard decision instead of soft decision) and a bigger RS coding would be necessary, which is not a big problem but days are too short... 73 Patrick - Original Message - From: Leigh L Klotz, Jr. To: digitalradio@yahoogroups.com Sent: Monday, January 21, 2008 5:49 AM Subject: Re: [digitalradio] Re: Redefining SSTV operations Patrick, The advantage of the MFSK analog picture mode is that it is already widely implemented, and almost all implementors of MFSK have it. Your RSID is now available in open source C++ pocketdigi so I suspect it will be incorporated into more programs as well. Put the two together and the mode will be widely available fairly soon. 73, Leigh/WA5ZNU On Sun, 20 Jan 2008 3:14 pm, Patrick Lindecker wrote: Sholto, Patrick, I just assumed that a digital SSTV mode in 500Hz that could send a decent size picture in a reasonable amount of time was impossible. With a standard modulation and a standard compression scheme you are perfectly right,
[digitalradio] Redefining SSTV operations
I'm interested in doing some more SSTV, either analogue or digital. However, I dislike the operations methods that one usually finds omn the standard SSTV calling frequencies. Usually, SSTV operations take the form of SSB phone chats before and after a a QSO. Then folks send pictures, often semi-naked females. They chat again, and exchange more pictures. Often, it seems that the calling frequencies are dominated by the same or or two i ndividuals for several hours at a time. It is almost like net and the person running the net calls the shots. I would like to see SSTV opertion be more like the standard digital mode operations. Contact established via image or data CQ's and then the exhanghe of station info and signal report. Currently sofware like Multipsk, Hampal, SSTV and the soon to be released DM780 with SSTV all enable the typing of an image that would contain text that you create.I would like to recommend 4 templates for SSTV 1. Standard CQ Image CQ CQ CQ de K3UK K3Uk Picture Fredonia, NY . USA. FN02HK 2. One of several reponse images with varying signal reports and a picture matching the report. de K3UK. Thanks, clear picture. Picture BTU de K3UK 3. de K3UK, OK TU SSTV QSO 73 image 4. If responding to a QSO de K3UK K3Uk Picture Fredonia, NY . USA. FN02HK Is there any interest in this? What new calling frequencies for 20M and 40M would you suggest?
