Thank you. This is very helpful. Having concluded that software-only at this resolution and frame rate, in real-time, is impractical, this has now led to a survey of hardware based solutions. Among them are ST Micro and Sanyo so far.
Regards, Steve -----Original Message----- From: Bernhard Praschinger [mailto:[EMAIL PROTECTED] Sent: Monday, October 15, 2007 10:06 AM To: [EMAIL PROTECTED]; MJPEG-tools user list Cc: [EMAIL PROTECTED] Subject: Re: [Mjpeg-users] MJPEG cpu MIPS Hallo > Hi All, am trying to find some benchmarking and CPU cycle estimates > to predict if software based MJPEG encode, or MJPEG decode, is > practical on an embedded uCLinux ARM platform. That sounds interresting. > the platform is based on an ATMEL AT91RM9200 ARM920T core 200 MIPS > clock. > > The target resolution and frame rate is VGA 640x480 30fps So you need a certain speed ? That looks like you want to to it in realtime. > What I hope to find is a reference that includes how many MIPS are > required for MJPEG encode, and for decode, at various resolutions and > frame rates. > Using this budget I can predict if software-only is practical on this > platform. I don't know of any source that has computed the number of Instrutions needed to decode a image. I can say that is was possible with the jpeg-mmx, with used mmx commands, to decode videos in realtime on a machine like Pentium III or AMD Athlon with 500MHz. According to Wikipedia, the PIII had about 1350 MIPS. Well you had a lot of overhad on the PC. I fear you won't be able to to it in realtime at the resoultion you noted. I found a interesting source on the net about somebody who has done something similar: http://www.stefan-kuhr.de/download/abstract.pdf (Title: Implementation of a JPEG Decoder for a 16 bit) He has done that for a diploma thesis a few years ago. So he might tell you some things. auf hoffentlich bald, Berni the Chaos of Woodquarter Email: [EMAIL PROTECTED] www: http://www.lysator.liu.se/~gz/bernhard ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
