On Mon, 21 Dec 2009 21:00:01 +0100, <speex-dev-request at xiph.org> wrote:> Thank you for your product Speex. We want to use it in > microcontroller AT91SAM7S256 (48 MHz).I'd strongly advice to use a higher performance micro. Let's consider that you'd succeed in getting it working right after optimizations. The time you want to add other speex features or other functionality you may run in trouble again. It is perhaps worth the effort only in really high-volume products... In a non-OS environment I believe an ARM9 or perhaps a Cortex-based micro with at least 150 MHz is the proper choice. For your information: it is known that (even) ARM9 @ 400 MHz has difficulties when speex is operated in a Linux environment (reference app: Linphone). And in a comparable environment a real DSP chip like Analog's blackfin has proved to operate without any trouble. Rob
The lowest I'v seen is a Cortex M3 from ST, look at st.com/mcu/download2.php?file=14910.pdf&info=STM32F103RB Firmwa re%20&url=st.com/stonline/products/literature/an/14910.pdf BR/Olle -----Original Message----- From: speex-dev-bounces at xiph.org [mailto:speex-dev-bounces at xiph.org] On Behalf Of Maris Engineering Sent: den 21 december 2009 21:18 To: speex-dev at xiph.org Subject: [Speex-dev] encoding time On Mon, 21 Dec 2009 21:00:01 +0100, <speex-dev-request at xiph.org> wrote:> Thank you for your product Speex. We want to use it in > microcontroller AT91SAM7S256 (48 MHz).I'd strongly advice to use a higher performance micro. Let's consider that you'd succeed in getting it working right after optimizations. The time you want to add other speex features or other functionality you may run in trouble again. It is perhaps worth the effort only in really high-volume products... In a non-OS environment I believe an ARM9 or perhaps a Cortex-based micro with at least 150 MHz is the proper choice. For your information: it is known that (even) ARM9 @ 400 MHz has difficulties when speex is operated in a Linux environment (reference app: Linphone). And in a comparable environment a real DSP chip like Analog's blackfin has proved to operate without any trouble. Rob _______________________________________________ Speex-dev mailing list Speex-dev at xiph.org lists.xiph.org/mailman/listinfo/speex-dev No virus found in this incoming message. Checked by AVG - avg.com Version: 9.0.717 / Virus Database: 270.14.113/2573 - Release Date: 12/21/09 08:36:00