From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mta2.srv.hcvlny.cv.net ([167.206.4.197]:47807 "EHLO mta2.srv.hcvlny.cv.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753022AbZFIOVT (ORCPT ); Tue, 9 Jun 2009 10:21:19 -0400 Received: from host143-65.hauppauge.com (ool-18bfe0d5.dyn.optonline.net [24.191.224.213]) by mta2.srv.hcvlny.cv.net (Sun Java System Messaging Server 6.2-8.04 (built Feb 28 2007)) with ESMTP id <0KKZ00J3F6JI3Z30@mta2.srv.hcvlny.cv.net> for linux-media@vger.kernel.org; Tue, 09 Jun 2009 10:21:21 -0400 (EDT) Date: Tue, 09 Jun 2009 10:21:17 -0400 From: Steven Toth Subject: Re: cx18, s5h1409: chronic bit errors, only under Linux In-reply-to: <829197380906081336n48d6090bmc4f92692a5496cd6@mail.gmail.com> To: Devin Heitmueller Cc: David Ward , linux-media@vger.kernel.org Message-id: <4A2E6FDD.5000602@kernellabs.com> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: 7BIT References: <4A2CE866.4010602@gatech.edu> <4A2D1CAA.2090500@kernellabs.com> <829197380906080717x37dd1fd8n8f37fb320ab20a37@mail.gmail.com> <4A2D3A40.8090307@gatech.edu> <4A2D3CE2.7090307@kernellabs.com> <4A2D4778.4090505@gatech.edu> <4A2D7277.7080400@kernellabs.com> <829197380906081336n48d6090bmc4f92692a5496cd6@mail.gmail.com> Sender: linux-media-owner@vger.kernel.org List-ID: > Steven, > > One thing that is interesting is that he is getting BER/UNC errors > even on ATSC, when he has a 30.2 dB signal. While I agree that the > cable company could be sending a weak signal, 30 dB should be plenty > for ATSC. > > Also, it's possible that the playback application/codec in question > poorly handles recovery from MPEG errors such as discontinuity, which > results in the experience appearing to be worse under Linux. > > I'm going to see if I can find some cycles to do some testing here > with s5h1409/s5h1411 and see if I can reproduce what David is seeing. Thanks. I ruled out 30db on ATSC because that sounds incredibly high, I assumed cable because that would be consistent with the numbers. You could well be right. -- Steven Toth - Kernel Labs http://www.kernellabs.com