31 December 2017

Advantages and disadvantages of GPRS

GPRS is third generation step towards internet access. GPRS full form General Packet Radio Service is one kind of mobile data service accessible to GSM and IS-136 mobile phones users. It is a high speed, point to point, and use packet switching technology intended for GSM. This article gives information about some advantages and disadvantages of GPRS to know more details about GPRS.

Advantages of GPRS :

  • Provide high-speed data service
  • Support bursty application like email, traffic, telemetry, broadcast service, and web browsing
  • GPRS offers fast connection set up a mechanism to offer a perception of being always on hence the GPRS devices are referred to as always connected
  • GPRS based network has high bandwidth
  • Provide point to point services
  • Mobility provides wireless internet access
  • GPRS is not possible to troubleshoot in case of issues
  • Deployment is easier
  • Communication via GPRS is cheaper than through the regular GSM networks
  • Constant connection to the internet 
  • GPRS provides wireless access to the internet from any location where there is a network signal so that you can surf the internet on your laptop or phone, even in remote areas
  • GPRS is still faster than the old WAP ( Wireless Application Protocol ) data is transferred at speeds ranging from 9.6 kilobytes per second up to 114 kbps
  • When you surfing the internet it doesn't block incoming calls enables you to make or receive voice calls while you are browsing the internet or downloading data. So that users can have both voice call and data call together

Disadvantages of GPRS :

  • Limited capacity for all users
  • Speed much lower in reality 
  • Data rates supported are slower compared to the latest wireless standards such as LTE or LTE-advanced. 
  • A mobile station using GPRS can't receive direct GPRS calls
  • A network can be affected when a large number of users in the same area utilize the GPRS services at the same time. 
  • Users may decide to charge based on time rather than volume
  • GPRS could be consumed by the public during the public emergency
  • Can have high latency, especially text messaging
  • Can not troubleshoot means works or doesn't
  • Expensive to add terminal above 4
  • Slower 72 Kbps vs 11 Mbps
  • Transit delay

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Types of multiple access techniques

Multiple access method is based on the multiplexing method. It is also called the channel access method. In a telecommunication system, the channel access method permits various terminals to connect to the same multi-point transmission medium to transmit over it and share its own capacity.

Through 'channel access' it is possible to share the communication capacity of the cellular system among a large number of the base stations.

 The three main multiple or channel access methods used to share the bandwidth in a wireless communication system, which generally fall into the following categories in the channel access method. 
  1. FDMA
  2. TDMA
  3. CDMA
  • FDMA full form is Frequency division multiple access (FDMA), it is the most common analog channel access method. Individual channels are assigned to individual users and each user is allocated a unique frequency band or channel.
  • TDMA full form is Time-division multiple access (TDMA), It is digital wireless telephony transmission techniques. In TDMA system divide the radio spectrum time slot only one user is allowed to transmit or receive. It can easily adapt to the transmission of data as well as voice transmission.
  • CDMA full form is Code division multiple access (CDMA), The narrowband message signal multiplied by a large bandwidth called spread signal. This spreading signal is actually a pseudo-noise code sequence and it has a higher rate than a data rate of the message signal.it is mostly used in cell phone standard. The user has to access the whole bandwidth for the entire duration.

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Application of GPRS

GPRS stands for General Packet Radio Service includes a variety of new and unique services to the mobile wireless subscriber. A wide range of corporate and consumer applications are enabled by nonvoice mobile services such as GPRS will introduce those that are particularly suited to them. Some characteristics of GPRS following below which cause many applications in non-voice mobile services. 

  1. Mobility - GPRS provides constant voice and data communication while on the move.
  2. Immediacy - GPRS allows the subscriber to obtain connectivity when needed. Not to worry about the location you are in and from where you are logged in.  
  3. Localization - GPRS gives information relevant to their current location on the facility they can get from.
A number of applications are developed using the above three characteristics and provided to the mobile subscriber. All the applications are divided into two high-level categories such as corporation and consumer. Both two categories again have an application which is listed below. 
  • Communication - Unified messaging, Fax, E-mail, Internet, etc. 
  • E-commerce - Retail applications like Amazon, ticket purchasing using UPI, banking, and financial and trading like balance checking and money transfer between bill payment, overdraft alert, accounts, etc.
  • Value-added services - Information services and other games include gaming applications.
  • Location-based applications - Navigation, airlines, rail schedules, location finder, updated traffic conditions.
  • Vertical applications - Delivery, fleet management, and sales force automation, etc
  • Advertising -  Using location-based application and advertising

Nowadays GPRS applications like chat, multimedia message, networks, personal information management, vehicle positioning, location-based services, and telematics.

Advanced business applications : 

  • Tracking of taxes and credit card validation for customer payment. 
  • Localization of stolen cars.
  • Control of the position of trucks for transportation companies. 
  • Support for security and monitoring system. 
  • Distribution of specific message to a selected group of users.
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23 December 2017

What is CDMA | Features | Advantages | Applications

Definition of CDMA :


CDMA is a digital cellular network standard and it can utilize speed spectrum technology. In this method, the user may transmit at the same time using the same frequency band but it can be using different codes so that we can decode to identify a particular user. 

Detailed information :

  • CDMA is very different from the time and frequency multiplexing, It is digital cellular technology that uses spread spectrum techniques.
  • In this technology, many users share the same carrier frequency. This frequency also multiplexed with the spreading signal of larger bandwidth. This spreading signal is a pseudo-noise code sequence has a higher chip rate than the data rate of the message signal.
  • CDMA is commonly used in an ultra-high-frequency cellular telephone system, band ranging between the 800 Mhz and 1.9 GHz.
  • The main advantage of CDMA, when compared to another multiple access method, is a reduced level of interference. As each user is allocated an individual pseudo-random codeword is orthogonal to the code words of the other users at the receiver end. Receiver tunes at the receiver end receive the intended signal of the user.
  • Power control is essential to minimize the near-far problem in these systems. Power control is implemented at the base station by sampling the radio signal strength indicator level of each mobile and then a power change command over the forward radio link.

Features of CDMA : 

  • Soft capacity limit.
  • Higher user capacity
  • CDMA is an interference-limited system.
  • Higher frequency reuse. 
  • Share the same frequency
  • As the number of users increases, system performance decreases.
  • The near-far problem arises at the receiver end.
  • Multipath fading can be reduced as the signal is spread over a large spectrum.
For detailed information : 
Read more >> CDMA features

Application of CDMA :

  • Used for the cellular system.
  • Most important for the GPS system. 
  • Used for subscriber access control.
  • Used for personal communication service.
  • Used for over the air activation.
  • Used for short message service.
  • The US-based Qualcomm standard marketed as CDMAOne. 
  • Used by UMTS 3G mobile phone standard.
  • Used in the OmniTRACS satellite system for transportation logistics. 
For detailed information : 
Read more >> CDMA applications
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What is TDMA | Features | Applications | Advantages

Basic information about TDMA :


TDMA full form is Time Division Multiple Access is one type of with the multiple transmitters instead of once transmitter connected to one receiver. 

It is a channel access method used for the shared medium network used in cellular or telecommunication. 

 It divides each cellular channel into three slots of time to increase the amount of data that can be carried.

Definition of TDMA :


Time-division multiple access (TDMA) is one type of multiple channel access method. In this method, each user allowed to transmit only in the specified time slot with a common frequency band. It allows several users can transmit to share the same frequency band at a different time, so each using its own time slot.

 For detailed information :
Read more >> TDMA definition 
. 

Detailed analysis of a TDMA :


TDMA provides different users share time slots of the complete time available. It uses time instead of frequency. For each user allocated a different time slot in which the user can access the channel. For that in each slot, only one user allowed to transmit or receive. 

In TDMA system users transmit in rapid succession, and each one uses its own time slot.

The transmission from different users in interfaced into a repeating frame structure and transmitted data is in burst and buffer method.

A frame consist of a number of slot, each frame consists of a preamble, an information message and trail bits. Half of the time slot will be used for the forward link channels and the remaining half is for reverse link channels.

The preamble comprises the address and synchronization data. Such data used by both the base station and subscribers to identify each other.

TDMA system has identical frame structure so it can be used for forward or reverse transmission, but the carrier frequencies will be different for both the links.

Features of TDMA 

  • Guard time needs to be minimized. 
  • Shares a single carrier frequency with multiple users.  
  • Less stringent power control.
  • Non-continuous transmission makes handoff simpler. 
  • Frequency/slot allocation complexity. 
For detailed information : 
Read more >> TDMA features

Application of TDMA :

  • TDMA used in digital cellular telecommunication.
  • Satellite system.
  • It is used GSM, IS-136, iDEN.
  • Dynamic TDMA used for packet mode communication.
  • GSM uses TDMA in combination with FDMA offers a big advantage of TDMA.
  • PON network also uses for upstream traffic from premises to the operator.
  • TDMA also used as telephone communication.
For detailed information : 
Read more >> TDMA Applications
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Features of TDMA

TDMA is a wireless system for shared-medium networks allows several users to share the same frequency channel by dividing the signal into different time slots. The users transmit in rapid succession, one after the other, each using its own time slot allows multiple stations to share the same transmission medium while using only a part of its channel capacity. 

TDMA system divides the radio spectrum into time slot only one user is allowed to transmit or receive. 

Features of TDMA 

  • Guard time needs to be minimized. 
  • The transmission rate is high adaptive equalization is necessary.
  • Shares a single carrier frequency with multiple users.  
  • Data transmission occurs in bursts. 
  • Frequency/slot allocation complexity. 
  • Slots can be assigned like demand in dynamic TDMA.
  • Less stringent power control.
  • Non-continuous transmission makes handoff simpler. 
  • Cell breathing is more complicated.
  • Pulsating power envelop & Interference with other devices. 
  • Low battery consumption because the transmitter of the subscriber can be turn off when it is not in use.
  • A different time slot for transmission and reception so that duplexes are not required mostly in this system. 
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22 December 2017

Advantages and disadvantages of FDMA

The term FDMA full form is Frequency Division Multiple Access gives users an individual allocation of one or several frequency bands or channel. As FDMA system use low bit rates compared to average delay spread it offers the following advantages. This article gives information about the advantages and disadvantages of FDMA to know more details about FDMA. 

Advantages of FDMA :

  • Synchronization is not necessary
  • If the channel is not used, it sits idle
  • Capacity can be increased can obtain efficient bit code
  • Very simple and easy to implement with respect to hardware resources
  • The complexity of the system is low
  • Simple algorithmically and from a hardware standpoint 
  • All station can operate continuously to 24 hours without having to wait for their turn to come
  • The reduction of the information bit rate can make a good effect on the capacity
  • No need for any network timing
  • FDMA is efficient, so it manages less number of a user population
  • No restriction regarding the type of base-band or modulation
  • Reduce cost and lowers the intersymbol interference ( ISI )

Disadvantages of FDMA :

  • The cell site cost is high
  • The bandwidth of the FDMA channel is narrow
  • Carry only one phone circuit at a time
  • As a result of nonlinear, intermodulation products are generated
  • Intermodulation frequencies can cause adjacent channel interference
  • Network planning is time-consuming
  • Spectrum planning is cumbersome and time-consuming
  • Does not differ significantly from an analog system
  • The presence of the guard band
  • Frequency allocated permanently 
  • Maximum bit rate per channel is fixed
  • Crosstalk may cause interference among frequency and disrupt the transmission

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20 December 2017

Number of channel in FDMA system

In an FDMA/FDD system, a single user occupies a single channel while the call is in process. The single-channel is two simplex channel that is frequency duplexed with a separation.

 The number of channels that can be simultaneously supported in an FDMA system is given by : 
N =  Bt - 2 Bguard  /  Bc   
Where,

 Bt  = Total spectrum allocation 
Bguard  =  Guard band allocated at the edge of the allocated spectrum
Bc = Channel bandwidth         
                    
For example:

Bt  = 10 MHz
Bguard = 10 KHz
Bc = 30 KHz

Find the number of channels available in the FDMA system?

             N =  Bt - 2 Bguard  /  Bc 
  
              = 10 * 106 – 2 * 10 * 103 / 30 * 103

          N  = 333

Each cellular carrier is allocated 333 channels.
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What is FDMA | Features | Types | Application | Advantages

In a wireless communication system, the individual users are allocated individual channels is called FDMA. It is a channel access method found in multiple access protocol as a channelization protocol. The channel or frequency band is unique for each subscriber.

Definition of FDMA :


Frequency division multiple access is a frequency band. It is one types of channel access method can be divided small frequency channel and also have different channel are allocated to different users. Multiple users can transmit at the same time but on the different frequency channel. 

 For detailed information :
Read a more  >> Definition of FDMA

Some useful information :

 

The entire allowed radio spectrum is divided into many slices of the frequency bands and each band or channel is allocated to the user. 

 In FDMA system the users are assigned a pair of frequency, one for the forward channel and other for the reverse channel. Because of that they have certain advantages and so the channel allocation can be done on a demand basis to the users to request service and thus call is processed.

 Nowadays the advanced digital mobile phone services use in FDMA system but add in TDMA to get three number of channels for each FDMA channel, so tripling the number of calls can be handled on a channel. 

 One main disadvantage is crosstalk, which can cause interference between frequencies and interrupt the transmission.

Features of FDMA :

  • The complexity is less.
  • Demands a highly efficient filter.
  • FDMA is not prone to the near-far problem that exists in CDMA because of frequency filtering.
  • Every user receives an individual frequency because all users transmit and receive at different frequencies.
For detailed information : 
Read more >> Features of FDMA


Types of FDMA : 

  • FAMA 
  • DAMA
Fixed assignment multiple access: 

 In this method, the channel is assigned in a predetermined manner and distributed so that random changes in the capacity are not allowed. It denoted as FAMA. 

Demand assignment multiple Access: 

 If there are multiple stations there is a change of capacity then the channel can be allocated to the demand. It donated as DAMA.

 Detailed information : 
Read more >> Types of FDMA 

Applications of FDMA : 


  • Telephone system
  • Radio system 
  • Cable TV
  • Walkie talkies
  • Mobile network for close user group. Example - WiFi
  • Total access communication systems (TACS)
  • 2G mobile communication
  • GSM uses FDMA in combination with TDMA
  • UMTS in combination with other multiplexing techniques 
Detailed information 
Read more >> Applications of FDMA
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19 December 2017

What is channel access method

A channel access method or multiple access methods allow more than two terminals connected to the same transmission medium to transmit over it and to share its capacity in telecommunication and computer networks. 

 A shared physical mediums are wireless networks, ring networks, bus networks and point to point links operating in half-duplex mode. 

The ability of the system to carry many signals at the same time is called channel access or multiple access methods. The cellular system consists may users that will share the bandwidth.

The channel access method is based on the multiplexing method. In a telecommunication system, the channel access method permits various terminals to connect to the same multi-point transmission medium to transmit over it and share its own capacity.

It is possible to share the communication capacity of the cellular system among a large number of a base station through channel access.

 It is based on a multiple access protocol and control mechanism known as media access control.

Types of channel access method : 

  • Frequency-division multiple access ( FDMA ) 
  • Time-division multiple access ( TDMA ) 
  • Code division multiple access ( CDMA ) 
  • Spread spectrum multiple access ( SSMA ) 
  • Space division multiple access ( SDMA ) 
  • Power division multiple access ( PDMA ) 
For detailed information :
Read more >> 

Channel access method based on the following features :

  • Token passing
  • Physical layer multiplexing
  • The media access control layer can be used for handle addressing and collision prevention
  • Contention
  • Pooling

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18 December 2017

CDMA advantages and disadvantages

Some points on the advantages and disadvantages of CDMA are discussed below. So let us check about the advantages and disadvantages to know more about CDMA. The term CDMA full form is Code Division Multiple Access. It is one type of cellular technology in which two main systems are Base systems and mobile subscribers or users. It allows multiple transmitters to transmit information over a single channel simultaneously. CDMA system works based on the spread spectrum concept. This article gives information about the advantages and disadvantages of CDMA to know more about CDMA technology. 

Benefits or Advantages of CDMA 

Following are the Advantages of CDMA
  1. CDMA channel is not easily decodable hence it offers increased cellular communication securities.
  2. It has more modest telephones.
  3. Call quality is better with more consistent sound as compared to GSM.
  4. Less interference due to handoff features reduces call-dropping.
  5. CDMA has the adaptable designation of assets.
  6. Gives better coverage needs fewer antenna sites and also consumes less power.
  7. Increase user capacity because of more users per MHz of bandwidth than any other system so that it has 4 to 5 times capacity than GSM.
  8. Better multipath performance.
  9. CDMA has a low force prerequisite.
  10. CDMA is inconceivable for programmers to untravel the code sent.
  11. No feeling of handoff while changing cells.
  12. The frequency reuse plan is easier to manage.
  13. It has smaller phones.
  14. CDMA works at an extremely low force level.
  15. Simple to add numerous quantities of clients.
  16. Greatest spectrum efficiency.
  17. Low power requirement.
  18. Increase efficiency as it can serve more users.
  19. High voice quality as well as signal quality.
  20. Flexible allocation of resources.
  21. Operate at a very low power level.
  22. CDMA is Scalable.
  23. CDMA does not require any synchronization.
  24. It has many numbers of users who can share the same bandwidth.
  25. Efficient practical utilization of fixed frequency spectrum.
  26. No sense of handoff when changing cells.
  27. Easy to add many numbers of users.
  28. Increase user resources.
  29. It helps in increasing client assets.
  30. Impossible for hackers to decipher the code sent.

Drawbacks or Disadvantages of CDMA 

The following are the disadvantages of CDMA
  1. Time synchronization is required.
  2. CDMA is complex.
  3. It can't offer international roaming, a large GSM advantage.
  4. The CDMA system performance degrades with an increase in the number of users.
  5. A network of CDMA is not mature because it is relatively new to GSM.
  6. While we are using CDMA, code length can be carefully selected, because it can induce a delay.
  7. When the number of users increases, the overall quality of service decreases.
  8. Self-jamming problem.
  9. The near-far problem arises when we are using CDMA techniques.
  10. Higher cost due to the greater equipment.
  11. It needs precision code synchronization to get the original baseband signal back.
  12. Reduce capacity because gradual transfer increases the use of radio resources.
  13. An increase in users will result in a decrease in QoS overall.
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What is plasma TV

What is plasma TV?

 Plasma TV is a television display technology in which each pixel on the screen is illuminated by a tiny bit of plasma or charged gas. 

One of the chief points of a plasma TV is a flat screen, which allows it to be mounted directly on a wall without a lot of clearance required

The individual pixels are made from three tiny containers of an inert gas such as neon or xenon as explained. There are many tiny tubes on an average plasma TV screen. All of this individual pixel is sandwiched between electrically charged plates.

The computer controls the electrical field down to the individual pixel, allowing a different combination of colors to glow. because a plasma TV screen quite a few more pixels than standard television, the image is noticeably sharper.

Plasma TV has a deeper, richer black and better contrast ratio. because the plasma screen is highly reflective glass, plasma performs best in rooms with some degree of light control.

 A plasma TV is a high definition (HDTV) alternative to the standard cathode-ray television. A plasma TV provides sharp images and vibrant colors, especially when used in the ratio for widescreen movie formats, as opposed to the box-like 4:3 ratio of standard television.

 The main drawback of the plasma TV system is vulnerable to damage. If a hard object sticks screen, hundred of individual gas-filled tubes instantly lose their ability to glow. because the gas forming the plasma can leak or become less reactive to electrical charges, the plasma TV system does have a limited shelf life.

 A plasma display is one advantages is their thier screen is made from glass, which reflects more light than the material used to make an LCD screen

Plasma TV display is to slim profile, better and more accurate color reduction than LCDs.
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What is Contrast ratio

The ratio of brightest white to the darkest black on TV or computer monitor. it is used to measure a difference between the brightest white and the darkest black. The contrast ratio will be measured as y:z, where 'y' is the brightest white, and 'z' is the darkest black. the contrast ratio for LCD and computer monitor is 200:1, a number higher than this, such as 600:1, has a brighter display.
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What is Resolution

The picture quality improves with greater details. The quality of detail is called resolution. It depends on the number of pixels that can be reproduced. If there are a number of pixels then obviously the picture will be having good resolution. For example, you must have seen the TV advertisement where the brands boast of showing the details of newsreaders eyelashes. This is possible when a TV has a very good resolution so that the picture shows clear details.
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Advantages and Disadvantages of LCD TV

The question which is in mind, Now people are replacing LCD TV into LED TV. Why people doing so? What are the main advantages and disadvantages of LCD TV? Following thread gives you answer about that. 

Advantages of LCD TV 

  • Slim profile
  • Can be wall mounted
  • Colors of images look more realistic
  • Better performance than plasma's for smaller screen size
  • Slightly lower power usage than equivalently sized plasma display
  • Lighter and less bulky rear-projection television 
  • Less heat is generated
  • Better under brighter conditions
  • No radiation emission from the screen
  • Space efficient and because they operate at much cooler temperatures cost less per hour than a plasma television
  • Longer life span
  • Higher resolution than plasma of the same size 
  • Lower cost than LED
  • Use less energy so energy efficient
  • More experienced video games recommend using LCD tv
  • Lighter in weight with respect to screen size
  • No burn in from stationary
  • No radiation emission from the screen
  • Reflect very little light, allowing them to maintain contrast levels and not be affected by glare
  • Not affected by the increases or decrease in air pressure
  • Saving our electricity bill because of lower power consumption

Disadvantages of LCD TV 

  • Response time is longer
  • Motion blur is noticeable
  • Prices are more expensive as compared to plasma TV of the same size
  • Poor black level because of that worse contrast ratio and details in the image
  • It relies heavily on thin-film transistors, which are easily damaged, resulting in a defective pixel
  • Response time is longer
  • Pixel burns on the screen 
  • Less picture clarity when viewed on the side or at a view from an angle 
  • Technology advancement is slowly easing this problem
  • Contrast adjustment is narrower in image
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17 December 2017

Plasma Display advantages and disadvantages

Some points on the advantages and disadvantages of Plasma display are discussed below. So let us check about the advantages and disadvantages to know more about plasma displays. A plasma display is a computer video display in which each pixel on the screen is illuminated by a tiny bit of plasma or charged gas, somewhat like a tiny neon light. 

Advantages of Plasma Display 


Following are the Advantages of Plasma Display
  1. It can be wall-mounted.
  2. It is a Simple profile.
  3. Less bulky than rear projection television
  4. Virtually less motion blur, so better motion tracking like high refresh rates and faster response time.
  5. It can display 16.77 million colours.
  6. More pixels per inch.
  7. It offers a widescreen 16:9 ratio display.
  8. Superior contrast ratio so that capable of producing deeper blacks. 
  9. Superior uniformity.
  10. It offers Excellent brightness across the entire screen.
  11. Wide side-to-side viewing angle compared to LCD.
  12. It offers high resolution.
  13. It is compatible to work with computers.
  14. Better colour accuracy and saturation.
  15. Large screen sizes can be manufactured commercially.

Disadvantages of Plasma Display :


Following are the Disadvantages of Plasma Display
  1. A picture is not so clear under bright conditions.
  2. Produce glare due to reflection.
  3. Glass screen damage can be permanent and far more difficult to repair.
  4. Poor reproduction of black.
  5. Radiation is emitted from the screen.
  6. The image brightness range is narrower.
  7. Less recommended for playing video games and used on a computer monitor
  8. Use more electricity so energy consumption is higher. 
  9. The cost is much higher compared to other displays.
  10. Require more power so energy consumption is more thus more heat produced.
  11. Some plasma display suffers from noticeable flickers with various hues, intensities, and patterns. 
  12. they have a shorter life span and there is no option to repair the brunt-out tube.
  13. Suffer from screen burn-in and image retention which makes PDPs unsuitable for displaying static images.
  14. They suffer from luminosity degradation that gradually declines their absolute brightness level.
  15. Plasma display only works well at high altitudes, particularly at elevations above 6500 feet or 2000 meters in which they start to display buzzing noise.
Thank you for reading this article. Still, if you have any questions or queries in mind on the Plasma Display advantages and disadvantages then please ask us in the comment section below. 

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16 December 2017

Difference between CRT TV, Plasma TV and LCD TV

After the digital broadcasting starts everyone will need a digital tuner to receive over-the-air signals. When we upgrade to a digital TV, we will not only get all the great benefits of digital broadcast, including theatre-quality picture and sound but also have access to additional digital services. So now let us talk about the difference between CRT TV, Plasma TV, and LCD TV.

CRT TV : 
  • Limited to about 40-inch screen size.
  • CRT TVs suffer from burn.
  • Longer lifespan than LCD and plasma, lasting over 80,000 hours.
  • Shipping is neither difficult nor expensive.
  • CRT TVs tend to have good contrast ratios than most flat-screen TVs.
  • Installation is straightforward and no professional is required. 
  • More durable than LCD and Plasma TVs.
  • They are Bulkier and are thicker than the flat screen.
  • They weigh more than LCD and Plasma TVs.
  • Better refresh rates compared with Plasma TVs than LCD TVs.
Plasma TV :

  • Average ranges from 32 inches to 63 inches, with Large plasma size 130-inch units and 150 inches.
  • Refresh and handle rapid movement in a video about as well as CRT television, which is about the standard most viewers expect.
  • Suffer from burn-in produced by static images. With technologies such as "pixel orbiter", new plasma TVs have addressed burn-in product life span.
  • Due to their fragile nature, Special shipping methods and their heavier weight add to higher shipping costs.
  • Plasma TVs report higher brightness and contrast levels than LCDs. 
  • Plasmas are heavier, use more power, run hotter than LCD TVs, and therefore require more planning when mounting them. Plasmas are generally best installed by professionals. 
  • Plasmas are best installed by professionals recent improvements to plasma screens have made them significantly more durable and lighter weight.
  • As thin as 3 inches deep.
  • Plasma displays are fairly heavy and may need additional supports to be mounted onto a wall.
LCD TV : 
  • Average screen sizes range from 13 inches to 65 inches.
  • Originally designed for static data display, and not moving video. LCD TVs are now available with refresh rates specified by manufacturers as low as 5ms.
  • They do not suffer from burn-in but can have a "retained pixel charge" which may also produce ghosting. Stuck pixels are also possible with an LCD display.
  • They have a backlight that is specified to last between 30,000 and 60,000 hours. LCD TVs also have replaceable backlights, but the expense of replacing one may be greater than simply replacing the entire TV.
  • Shipping LCD TVs is not difficult and is not as expensive as shipping plasma displays 
  • They can often look better in 'real-world' situations. LCD TVs reflect very little light, allowing them to maintain levels in well-lit rooms.
  • End users can easily install LCD TVs themselves, or can use them just as they use a traditional TV using a stand.
  • Somewhat more durable than older plasma. End users can easily mount an LCD TV themselves if desired, although LCD TVs should still be shipped with special care, and the screen itself should be cleaned with a streak-free cleaner.
  • As thin as 2 inches deep.
  • LCD TVs weigh less than comparably sized plasma TVs.
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