Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS,T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: EATSERVER: mailn 1166; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id uBQGwpKN020669 for ; Mon, 26 Dec 2016 17:58:52 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cLYTI-0002sy-BQ for rs_out_1@blacksheep.org; Mon, 26 Dec 2016 16:50:00 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cLYTH-0002sp-RB for rsgb_lf_group@blacksheep.org; Mon, 26 Dec 2016 16:49:59 +0000 Received: from rgout0701.bt.lon5.cpcloud.co.uk ([65.20.0.141]) by relay1.thorcom.net with esmtp (Exim 4.87) (envelope-from ) id 1cLYTE-0004uw-Se for rsgb_lf_group@blacksheep.org; Mon, 26 Dec 2016 16:49:58 +0000 X-OWM-Source-IP: 86.140.22.31 (GB) X-OWM-Env-Sender: alan.melia@btinternet.com X-Junkmail-Premium-Raw: score=12/50,refid=2.7.2:2016.12.26.160616:17:12.455,ip=,rules=__HAS_MSGID, __SANE_MSGID, MSGID_32HEX_LC, INVALID_MSGID_NO_FQDN, __MSGID_32HEX, __HAS_FROM, __FRAUD_WEBMAIL_FROM, __TO_MALFORMED_2, __TO_NO_NAME, __REFERENCES, __BOUNCE_CHALLENGE_SUBJ, __BOUNCE_NDR_SUBJ_EXEMPT, __SUBJ_ALPHA_END, __MIME_VERSION, __CT, __CT_TEXT_PLAIN, __CTE, __HAS_X_PRIORITY, __HAS_MSMAIL_PRI, __HAS_X_MAILER, USER_AGENT_OE, __OUTLOOK_MUA_1, __USER_AGENT_MS_GENERIC, __ANY_URI, __URI_WITH_PATH, __URI_NO_WWW, __CP_URI_IN_BODY, __SUBJ_ALPHA_NEGATE, __MULTIPLE_URI_TEXT, __URI_IN_BODY, __FORWARDED_MSG, __NO_HTML_TAG_RAW, BODYTEXTP_SIZE_3000_LESS, BODY_SIZE_1400_1499, __MIME_TEXT_P1, __MIME_TEXT_ONLY, __URI_NS, HTML_00_01, HTML_00_10, BODY_SIZE_5000_LESS, __FRAUD_WEBMAIL, __OUTLOOK_MUA, __PHISH_SPEAR_STRUCTURE_1, BODY_SIZE_2000_LESS, __MIME_TEXT_P, FORGED_MUA_OUTLOOK, REFERENCES, BODY_SIZE_7000_LESS, NO_URI_HTTPS, MSG_THREAD, LEGITIMATE_SIGNS, LEGITIMATE_NEGATE Received: from gnat (86.140.22.31) by rgout07.bt.lon5.cpcloud.co.uk (9.0.019.13-1) (authenticated as alan.melia@btinternet.com) id 58482FD7019FB23E for rsgb_lf_group@blacksheep.org; Mon, 26 Dec 2016 16:49:56 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=btinternet.com; s=btcpcloud; t=1482770996; bh=aLUA0N/C/zpDaYJ3I3dq3xUNmPAI7pV/CLskwD3Zx5U=; h=Message-ID:From:To:References:Subject:Date:MIME-Version:X-Mailer; b=B91LgFx7PQoSG+XEAmKvO0/r+B4EPPkoY1ef4ZgM/o52C/HoyMoCLYiitJSHpj54XC3RDmKLIpgaku8MN7iuSolZnvE6I3pGXen5lU55BUvf7oXf8M550W9dSR7hqMbyGmojo+/Mb6TIU16BBlkejhUk4WLfOpADTEOJxjgVAqM= Message-ID: <50D999B1045A4675874D265DAC4457A6@gnat> From: "Alan Melia" To: References: <5860C842.90809@abelian.org> Date: Mon, 26 Dec 2016 16:49:47 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 X-Scan-Signature: 3b8620872b19e25fb6f4dfaf1256edc3 Subject: LF: Re: Article on forward error correction Content-Type: text/plain; format=flowed; charset="utf-8"; reply-type=response Content-Transfer-Encoding: 7bit X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Scanned-By: MIMEDefang 2.75 Status: O X-Status: X-Keywords: X-UID: 9959 Hi Paul, thank you for the effort put into his. I found it "easy reading" and very informative. It filled in a lot of the areas where I have "read the words" previously but often not fully understood the significance. It probably deserves wider circulation amongst the amateur community where it has the power to dispel some of the "smoke and mirrors" magic of "digital". Alan G3NYK ----- Original Message ----- From: "Paul Nicholson" To: Sent: Monday, December 26, 2016 7:35 AM Subject: LF: Article on forward error correction > > I wrote a non-mathematical introductory article about how > forward error correction works. > > There's a lot of material on the web about FEC but most > of it is very technical and tends to concentrate on one or > another particular coding scheme. I couldn't find anything > that demonstrates and really explains in simple terms the > essential principle of it. > > So I thought I'd try to write something, perhaps to see if > I can understand it myself. > > The article should appeal to anyone who's wondered how 'coding' > a message, which increases its bandwidth and reduces its S/N, > can actually lead to greatly improved communications. > > http://abelian.org/fec/pn161218/ > > or in pdf format > > http://abelian.org/fec/pn161218.pdf > > Whether I've succeeded or not, the reader will have to judge. > > -- > Paul Nicholson > -- >