Systems Architecture Study Set 1

Computing

Quiz 7 :

Inputoutput Technology

Quiz 7 :

Inputoutput Technology

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What is an image description language? What are the advantages of representing images with image description languages?
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Image Description Language
Av Image Description Language is the device independent. It can use compact bit strings, Unicode text, or ordinary text to describe the primitive components of image such as simple shapes or straight lines.
Advantages of image description language are given below:
1. It overcomes the drawbacks of slow transmission of files over communication links.
2. It provides a standard format for raw bitmaps.
3. This is device independent.
4. They reduce the requirement for storage space because a description of the image is much smaller than a bitmap of that component.
5. An IDL can represent text in a specific format by storing the text in Unicode or ASCII format.

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________________ printer forces ink onto a page by heating it or forcing it out with a piezoelectric membrane.
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Printers
A(n) inkjet printer forces ink onto a page by heating it or forcing it out with a piezoelectric membranes.
Explanation:
The Inkjet printer is one of the printer technologies that are used for printing purposes. It places the ink in liquid form on to the paper directly. The ink is forced out of the nozzle by making use of piezoelectric membranes.

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Flat panel display technology changes so rapidly that many of the comparative statements made in this chapter might be out of date before the book is published. Investigate current LCD, plasma, and LED display products and answer the following questions: • Do LCDs still have a price and performance edge over LED and plasma displays? • Have LED and plasma display lifetimes advanced enough to make them viable monitors for most desktop computers? • Are any new flat panel display technologies coming into the marketplace?
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Video Display
Price and performance comparison of LCD, LED and Plasma displays:
Apparently the comparison between the three is viable to come up with a possible verdict about the price and performance edge over the other display technologies.
Starting out with the "price" factor, the plasma displays are the cheapest followed by LCD or liquid crystal displays which are not very far off though.
However, price isn't a big factor as the difference between the two is merely compensated by the power consumption required by each. The plasma displays have huge electricity requirements as compared to LCDs and LEDs.
The LED or light emitting diode technology is the costliest so far.
The performance depends on a variety of factors such as the contrast ratio, color, motion, display lifespan, and power consumption. The display technologies are compared for each of these factors below:
• The contrast ratio and motion display quality of the plasma displays is better than LCD and LED because the plasma display consists of different cells.
• The color quality of all is more or less the same for each display.
• The viewing angle of LCD is far off by the quality offered by plasma and then LED.
• The LCD consumes the least power of all, followed by LED and finally plasma.
• The display lifespan of LCD is better than plasma, and the LED goes untested for now as it is a new technology.
• The plasma displays are much heavier than LCD and LED.
The picture quality of LCD is second to LED and plasma; however it consumes much less power than both with a greater lifespan too. A normal user, may not even be able to distinguish between the display quality of LED and LCD and may go opt for LCD because it is anyway cheaper than an LED and lighter than a plasma with much less power consumption.
Hence, it can be assumed that LCD still has an edge over the plasma and LED. This can be debated well for different opinions; however, the plasma would be outdated and LEDs would be costly as compared to the new and better LCD technology.
LED and plasma display lifetimes:
As already discussed above, the lifespan of LCD is much more than the plasma and this is the reason most desktop computer monitors are using the LCD technology nowadays. As far as the LED is concerned, it is a new technology and hasn't been tested enough to give a definite idea of its lifespan.
Thus, LED and plasma display lifetimes have not advanced enough to be suitable for desktop monitors.
New display technologies:
In the era of innovation, new technologies are in constant research. Two such new flat panel display technologies are LEP (Light Emitting Polymer) displays and FED (Field Emission Displays).
LEP is a polymer and insulator based technology with better display quality and much lower power consumption.
FED on the other hand is based on the old cathode ray technology with advancements leading to a much thinner display. It overcomes major technical issues related to the CRTs used.

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________________ is another name for a large-format printer.
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Describe the technologies used to implement flat panel displays. What are their comparative advantages and disadvantages?
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Investigate audio interfaces that support recording multichannel digital sound, such as those offered by MOTU ( www.motu.com ), M-Audio ( www.m-audio.com ), and Echo Digital Audio ( www.echoaudio.com ), and answer the following questions: • How are the interfaces connected to the computer? • What types of audio connections are supported? • What are the minimum software and hardware requirements for the host computer? • Which are best suited to use at home for simple composing and recording projects? • Which are best suited to use in recording studios or for recording a live concert?
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What is a bitmap? How does a bitmap s chromatic resolution affect its size?
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What is JPEG encoding? What is MPEG encoding?
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What are the additive colors? What are the subtractive colors? What types of I/O devices use each kind of color?
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____________displays have replaced CRTs for video monitors.
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The _________or____________ format is commonly used to compress still images.
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Investigate the Direct3D and OpenGL video standards and answer the following questions: • For what types of applications was each originally developed? • What OSs support each standard? • Does either standard have a clear advantage in any market segments or for specific types of applications? • What skills are needed for a programmer to use either standard?
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The printing industry generally uses inks based on the colors, which Are_____________ ,______________ , and ___________________. A(n)________________ ink can also be used as a fourth color.
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Color video display can be achieved by using elements colored ____________, ___________, and ______________________.
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________________and _____________are commonly used image description languages for documents.
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________________ display achieves high-quality color display with organic compounds.
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Why does a video controller have its own processor and memory?
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What is a font? What is point size?
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Describe the process by which software recognizes keystrokes.
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Many organizations store all documents, such as medical records, engineering data, and patents, as graphics files. Identify commercial software products that support this form of data storage. Examine the differences between these products and more traditional data storage approaches. Concentrate on efficient use of storage space, internal data representation, and methods of data search and retrieval. What unique capabilities are possible with image-based storage and retrieval? What additional costs and hardware capabilities are required? Examine sites such as www.databankimx.com and www.knowledgetree.com.
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