Return-Path: Message-ID: <459D3730.6080504@gmx.de> Date: Thu, 04 Jan 2007 18:19:44 +0100 From: Siegbert Baude MIME-Version: 1.0 To: BlueZ development References: <459D10F6.8090509@uni-ulm.de> <459D26CF.5030709@palmsource.com> In-Reply-To: <459D26CF.5030709@palmsource.com> Subject: Re: [Bluez-devel] SBC codec, joint stereo mode Reply-To: BlueZ development List-Id: BlueZ development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Sender: bluez-devel-bounces@lists.sourceforge.net Errors-To: bluez-devel-bounces@lists.sourceforge.net Hi Fr=E9d=E9ric, Fr=E9d=E9ric DALLEAU schrieb: > page 53 says join[sb] is nrof_subbands-1 bits wide =3D> wich is 7 bits. Oh, my blindness. Thanks a *lot* for the hint, maybe I didn't read it = carefully enough, because the decoding code sample I looked first at, = was evaluating nrof_subbands instead of nrof_subbands-1. > The 8th bit is the RFA which is 0. > 0xBC =3D 10111100, The first 7 bits are the join table, the last bit is = > the rfa. > Then 87 is already the scale factors. Yep, now it makes sense. BTW, is this the right list to ask SBC-specific questions? I have some = more general questions, e.g. I don't quite understand the rationale = behind the codec definition: If you choose joint mode for encoding, it = happens that the encoder does not use joint mode for all subbands. But = why? Saving bits? If anybody has a pointer to some documentation for = SBC, which explains the design decisions I would be really happy. Ciao Siegbert ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=3Djoin.php&p=3Dsourceforge&CID=3DDE= VDEV _______________________________________________ Bluez-devel mailing list Bluez-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-devel