Definitions: MHZ The megahertz, abbreviated MHZ, is a unit of alternating current (AC) or electromagnetic (EM) wave frequency equal to one million hertz (1,000,000 Hz). The megahertz is commonly used to express microprocessor clock speed. The unit is occasionally used in measurements or statements of bandwidth for high-speed digital data, analog and digital video signals, and spread spectrum signals. (Stolen from http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci212562,00.html)
Frame Rate In motion pictures, television, and in computer video displays, the frame rate is the number of frames or images that are projected or displayed per second. Frame rates are used in synchronizing audio and pictures, whether film, television, or video. In motion pictures and television, the frame rates are standardized by the Society of Motion Picture and Television Editors (SMPTE). SMPTE Time Code frame rates of 24, 25 and 30 frames per second are common, each having uses in different portions of the industry. The professional frame rate for motion pictures is 24 frames per second and, for television, 30 frames per second (in the U.S.). (Stolen from http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci213531,00.html) Normally, MHz is going to refer to the refresh rate of the _monitor_, rather than the animation on the screen. Frame rate is going to be in Hz, not MHz. If I remember correctly, Refresh rates go from 16.7 MHz (for TV, up to 120+ MHz for the best gaming cards/monitors out there. But the following text should educate you on what and why (and even a little how) Authority: 29 U.S.C. 794d. Subpart B -- Technical Standards � 1194.21 Software applications and operating systems. (h) When animation is displayed, the information shall be displayable in at least one non-animated presentation mode at the option of the user. (k) Software shall not use flashing or blinking text, objects, or other elements having a flash or blink frequency greater than 2 Hz and lower than 55 Hz. � 1194.22 Web-based intranet and internet information and applications. (j) Pages shall be designed to avoid causing the screen to flicker with a frequency greater than 2 Hz and lower than 55 Hz. (j) above matches up to: Web Content Accessibility Guidelines 1.0, W3C Recommendation 5-May-1999, Guideline 7. Ensure user control of time-sensitive content changes. (http://www.w3.org/TR/1999/WAI-WEBCONTENT-19990505/#gl-movement) 7.1 Until user agents allow users to control flickering, avoid causing the screen to flicker. [Priority 1] Note. People with photosensitive epilepsy can have seizures triggered by flickering or flashing in the 4 to 59 flashes per second (Hertz) range with a peak sensitivity at 20 flashes per second as well as quick changes from dark to light (like strobe lights). And here is how the w3C org advises you do this. http://www.w3.org/TR/WAI-WEBCONTENT-TECHS/#tech-avoid-flicker (Whew.) Jerry Johnson >>> [EMAIL PROTECTED] 06/06/02 02:23PM >>> I work for the government and we are mandated to comply with Section 508 standards. Within these standards, there are limits to the speed of animation or scrolling banners. They must be withing a certain range. I guess I am looking for anything that will measure the speed of the graphic (I was asked for MHz but it may be FPS). Any help would be greatly appreciated (if you don't help, I'll go ahead and appreciate you anyways!) Brian Yager President - North AL Cold Fusion Users Group http://www.nacfug.com Sr. Systems Analyst NCCIM/CIC [EMAIL PROTECTED] (256) 842-8342 -----Original Message----- From: Jerry Johnson [mailto:[EMAIL PROTECTED]] Sent: Thursday, June 06, 2002 1:28 PM To: CF-Talk Subject: Re: Measuring the speed of an animated graphic or java I don't know how useful a speed in MHZ is going to be. Do you really mean frame rate in FPS (frames per second)? or download speed? What do you mean by "speed"? (I don't know is NOT a valid answer for this exercise) Jerry Johnson >>> [EMAIL PROTECTED] 06/06/02 02:07PM >>> I have been tasked to find out how to measure the speed of an animated graphic or javascript banner. Does anyone know of any utilities that will tell me the MHz of something? I am going to also send this out to the Javascript board. Thanks, Brian Yager President - North AL Cold Fusion Users Group http://www.nacfug.com Sr. Systems Analyst NCCIM/CIC [EMAIL PROTECTED] (256) 842-8342 ______________________________________________________________________ Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Archives: http://www.mail-archive.com/[email protected]/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
