Return-Path: Reply-To: From: "Christian Hoene" To: "'Marcel Holtmann'" Cc: "'Siarhei Siamashka'" , "'ext Brad Midgley'" , "'Jaska Uimonen'" , References: <1227879337.20555.12.camel@esdhcp03999.research.nokia.com> <200812230130.43968.siarhei.siamashka@nokia.com> <1229994015.8047.27.camel@californication> <200812231245.14493.siarhei.siamashka@nokia.com> <1230032888.8047.34.camel@californication> <001501c96996$20018070$60048150$@hoene@gmx.net> <1230544837.13620.44.camel@californication> In-Reply-To: <1230544837.13620.44.camel@californication> Subject: RE: Testing SBC filtering functions Date: Mon, 29 Dec 2008 11:55:30 +0100 Message-ID: <002001c969a3$fd7f1680$f87d4380$@hoene@gmx.net> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" List-ID: Hello Marcel, > I leave the patches to the guys that actually know what they are doing. > > So I like the test script, but I would really prefer if we can use > sbctester.c program to verify the results. What do you think? The sbctester.c works fine for the decoder and is used in the testing script. The testing of the encoder might also work with test procedure implemented in sbctester.c. However, the official Bluetooth testing spec requires that "9.2.2.1 SBC Encoder ... [E2] The subjective quality (measured by standardized way or by objective testing methods, see [6]and [7]) shall be equivalent to that of reference encoder." with " [6] Rec. ITU-R BS.1116-1, "METHODS FOR THE SUBJECTIVE ASSESSMENT OF SMALL IMPAIRMENTS IN AUDIO SYSTEMS INCLUDING MULTICHANNEL SOUND SYSTEMS", 1994-1997 [7] Rec. ITU-R BS.1387-1, "METHOD FOR OBJECTIVE MEASUREMENTS OF PERCEIVED AUDIO QUALITY", 2001". Until the encoder works fine, we should use BS.1387-1 (PEAQ). If all errors have been fixed, then sbctester.c might can be used instead of ITU-R BS.1387-1. However, then, we might still need the reference implementations or some pretranslated wav and sbc files. Until the encoder is bug-fixed, it makes sense to work with this intermediate solution. With best regards Christian