CPT ch8 TECH

digital convergence
the use of a single device to handle media, internet, entertainment, and telephony needs; ex.evolution of smart phones, migration of digital devices into environments like the cabin of cars
DLNA (digital living network alliance)
an organization working to standardize different kinds of appliances and network devices used in our homes
telephony
the use of equipment to provide voice communications over a distance; has shifted from analog science to a digital one
cellular
all phones that use mobile, cellular technology
feature
inexpensive phones with modest processors, simpler interfaces, and often no touch screen
base transceiver station
a large communications tower with antennas, amplifiers, receivers, and transmitters where each geographic cell area is centered
mobile switching center
when you place a call on a cell phone, the base station picks up the request for service and it is then passed through a central location called a ____ ____ _____
analog to digital converter chip
what converts the sound waves from when you speak into a cell phone into digital signals
digital signal processor
what in the cell phone compresses the digital sound signals so it will transmit more quickly and handles the compression work
synching
the process of updating your data so your to do lists, schedules and other files on your cell phone and computer are the same
wired
synching; transferring information between phone and computer using a micro SD card or USB cable
wireless
symching; transferring information between phone and computer using a wireless connection
bluetooth
type of chips that transfer data wirelessly to other enabled devices using radio waves to transmit the signals
SMS (short message service)
a technology that lets you send short text messages over cellular networks
MMS (multimedia message service)
an extension of SMS that lets you send messages that include text, sound, and video clips to other phones or email addresses
wireless ISP
what connects your smartphone to the internet
data plan
an internet connectivity plan or text message plan is usually known as a…
3G
cellular data transfer standards; transfer rates as high as 3.8 Mbps, more reliable than WiFi and is less susceptible to interference, blankets most major urban areas with connectivity
4G
cellular data transfer standards; provides connection speeds of up to 100 Mbps
tethering
an approach to connect to the internet – as long as you have 3g/4g signal, your coputer can access the internet even when it tells you there are no available wireless networks by connecting a phone through bluetooth and then provide internet access through the network
VoIP (voice over IP)
a form of voice based internet communication that turns a standard internet connection into a means to place phone calls, including long distance calls; uses technology similar to that used in email to send your voice data digitally over the internet
GPS (global positioning system)
a network of 21 satellites that constantly orbits the earth; devices use an antenna to pick up signals from the satellites and use the software to transform signals into latitude and longitude to determine geographical location to within 3 ft
screen size
what is the main difference between a tablet and a smartphone
netbooks
tablets, netbooks, ultrabooks; traditional OS, keyboard, 2 lbs or less, inexpensive in comparison
ultrabooks
tablets, netbooks, ultrabooks; full featured computers, think, no optical drives, offers SSD drives, under 3 lbs, full size keyboards
analog
type of waves that are digitized from sound and light waves that illustrate the loudness of a sound or the brightness of the colors in an image
etext (electronic text)
textual information caputred digitally so that it can be stored, manipulated, and transmitted by electronic devices (E-readers)
E ink (electronic ink)
technologies for representing digital text that is a very crisp, sharp grayscale representation of text where the devices reflect the light that shines on the page and are not backlit; easier to read in sunlight
backlit
technologies for representing digital text that is the high resolution backlit monitor where the glass does reflect glare which makes it hard to use in sunlight
sampling rate
the number of times the analog wave is measured each second; the higher it is the more accurately the original wave can be recreated
DRM (digital rights management)
a system of access control that allows only limited use of material thats been legally purchased; song that con only run on certain devices or movie that can only be viewed a certain number of times
CCD (charge coupled device)
cameras; the electronic sensors in digital cameras that capture the images which arrays and then converts them to digital data
resolution
cameras; the number of data points it records for each image captured; measured in megapixels (MP)
RAW
cameras; files have different formats and extensions depending on the manufacturer. these file records all of the original image information, therefore larger
JPEG
cameras; files can be compressed a bit, keeping most of the details, or compressed a great deal, losing some detail; can select from a few different compression levels
OCR (optical character recognition)
scanners; software that converts pages of handwritten or typed text into electronic files, you can open and edit these documents with word processing programs
codec
digital video; a rule that squeezes the same audio and video information into less space
HD (high definition)
a standard of digital tv signal that guarantees a specific level of resolution and a specific aspect ration