INPUT DEVICES Voice Recognition System Enable hands-free interaction but normally need to be taught to recognize the user’s voice.This can take some time so they are not suitable for public kiosk applications.Most voice recognition systems can recognize a number of single words commands such as ‘Print’ and ‘Save’There are also dictation systems which can transcribe spoken text with a high degree of accuracy and may be alternative to typing of multimedia scripts.
INPUT DEVICES Digital Cameras Digital still cameras provide a direct way of capturing digital images and are becoming increasingly common.The memory requirements of a digital camera image will depend on the resolution used, but will commonly be around 2mb
OUTPUT DEVICES Monitors Most multimedia is presented on color monitors that display a matrix of 640 pixels wide and 480 pixels high with 256 colors for each pixelThis is called VGA (Video Graphics Array) and is sufficient to display good photo-realistic images.As the number of colors increases the performance of the computer needs to be boosted to maintain the quality of the image.
INPUT DEVICES Sound Cards Whereas all Macintoshes have internal speakers and a sound card these may need to be added to a PC (although an increasing number of PCs have built in sound cards and internal or external speakers)
OUTPUT DEVICES Video Devices Good video can greatly enhance and application whereas poor video can detract from its other features.As well as ensuring that the source material is high of quality, it is important the devices chosen to play it will optimize performance.A video digitizing board installed in the computer will enable the monitor to display a television picture.Display of video on any computer platform requires the manipulation of an enormous amount of data
OUTPUT DEVICES Video Devices There are a wide variety of video cards available which support various sizes of video within a window. Other facilities provided are:The identification of source videoSet-up of play sequencesSpecial effects
