Define refresh rate and refresh buffer, Computer Graphics

Refresh Rate: refreshing on raster - scan displays is carried out at the rate of 60 to 80 frames per second, although some system are designed for higher refresh rates. Sometimes, refresh rates are described in units of cycles per second, or Hertz (Hz), where a cycle corresponds to one frame. Using these units, we would describe a refresh rate of 60 frames per second as simply 60 Hz.

 Refresh buffer: in a raster-scan system, the electron beam is swept across the screen, one row at a time from top to bottom. As the electron beam moves across each row, the beam intensity is turned on and off to create a pattern of illuminated spots. Picture definition is stored in a memory area called the refresh buffer or frame buffer. This memory area holds the set of intensity values for all the screen points. Stored intensity values are then retrieved from the refresh buffer and ''pointed'' on the screen on row at a time. Raster - scan systems interactive raster graphics system typically employ several processing units. In addition to the central processing unit, or CPU, a special - purpose processor called the video - controller or display controller, is used to control the operation of the display devise. Organization of a simple raster scan system shown in figure below. Here the frame buffer can be anywhere in the system memory and the video controller accesses the frame buffer to refresh one screen. In addition to the video controller, more sophisticated raster systems employ other processors as coprocessor and accelerators to implement various graphics operations.  

 

Posted Date: 7/1/2012 6:27:04 AM | Location : United States







Related Discussions:- Define refresh rate and refresh buffer, Assignment Help, Ask Question on Define refresh rate and refresh buffer, Get Answer, Expert's Help, Define refresh rate and refresh buffer Discussions

Write discussion on Define refresh rate and refresh buffer
Your posts are moderated
Related Questions
Subdivision Algorithm - Visible Surface Detection 1) Initialize the area to be the whole screen. 2) Create a PVPL regarding an area, sorted on z min as the smallest z coor

Common Principles of Ray Tracing Based upon the nature or attributes of the surface given by the user, the subsequent effects are implemented, as per to rules of optics:  a

Uses for GIF and JPEG Files: Microsoft Internet Explorer, Netscape Navigator and most the other browsers maintain both JPEG and GIF graphics. Theoretically, you could util

Performing rotation about an Axis For performing rotation about an axis parallel to one of the coordinate axes (say z-axis), you first need to translate the axis (and hence the

Q.   What are Bezier cubic curves? Derive their properties. OR  What are Bezier cubic curves? Derive these properties. Also show that the sum of the blending functions is identical

1. Using a time Delay Method The delay required between issuing each character to the LCD is about 5-10ms (it's simply known as DELAY). When programming an LCD, a long delay is

what I unity of java game?

What is surface patch?  A single surface element can be explained as the surface traced out as two parameters (u, v) take all possible values between 0 and 1 in a two-parameter

Question: List five different areas of applications of computer graphics Answer: Five major areas of applications of computer graphics are:  i) Study of molecular structures.

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4