Unit 08: Managing your Digital Lifestyle: Challenges and Ethics Flashcards
Digital Convergence?
ability to use a single device to meet out media, internet, entertainment, and phone needs
Digital Living Network Alliance
an organization designed to standardize digital convergence
internet of things?
the interconnection of embedded computing devices that transfer data over a network without human interaction
8 categories of the internet of things?
- home entertainment
- security cameras
- appliances
- security locks
- lighting
- smoke detectors
- thermostat
- irrigation
digitized?
when info is measured and converted to a stream of numerical values
analog waves?
sinusoidal waves - sound/light waves
advantage of digital versus analog formats?
can be reproduced and distributed easily due to it being a string of numbers. compared to analog which needs to be converted
analog versus digital entertainment
a) publishing
b) music
c) photography
d) video
e) radio
f) TV
analog - digital
a) books - e-books
b) record/cassette tapes - CD’s/MP3 files
c) film cameras - digital camgeras
d) film stored on tapes - DVD/blu-ray
e) AM/FM radio - streaming music stations
f) analog TV broadcast - HDTV
SiriusXM and HD Radio are examples of?
satellite radio systems broadcasted in digital formats
how is analog converted to digital?
analog-to-digital conversion - where the strength of the analog wave is measured using numerical values creating a string of numerical value representing the analog wave
e-text?
electronic text - textual info captured digitally so that it can be stored, manipulated, and transmitted by electronic devices
e-readers
devices that display e-text
Amazon Kindle, Barnes & Noble NOOK are examples of?
e-readers
6 basic features of e-readers
- integrated dictionaries
- not-taking and highlighting capabilities
- URL links to glossary
- bookmarks
- connection to different version - audiobooks
- magnification
MagicScroll Web Reader
a google browser add-on for e-texts
E Ink? example
electronic ink - sharp grayscale representation of text
amazon kindle paperwhite
2 popular tech used to represent digital text
- E Ink
2. backlit monitors
backlit monitors? example
devices with a screen that illuminate themselves instead of depending on room lighting
Amazon Fire
which digital text has the longest battery life? what is the battery life of each
a) E Ink
b) backlit monitors
a) longer - 1-2 months
b) 8-10 hours
are e-books limited in libraries?
yes a library has a specific number of copies of each e-book - only so many licensing numbers
Project Gutenberg
source of free e-reading
5 steps to creating digital music
- play music and creat to creat analog wave
- microphone feeds analog wave into an ADC chip
- ADC digitizes the wave
- the digital wave (series of numbers) is recorded onto digital media
- playback device uses DAC to convert digital to analog waves to be heard through the speaker rather than live
ADC?
analog-to-digital converter
DAC?
digital-to-analog converter
sampling rate?
specifies the number of times the analog wave is measured per second - dictates how close the digital wave is to the analog wave
DivX and MPEG-4 are examples of?
digital music file types with a .mp4 extension
WMV and Xvid are examples of?
digital music file types that hold both video and audio info
What determines how much digital media a device can hold?
- storage space
2. the quality of the sampling rate - better = larger file
ripping?
converting a song from CD to digital MP3 file
can you control MP3 file size
yes by ripping because it allows user to control the sampling rate
DRM?
digital rights management - a system of access control that enables only limited use of material that have been legally purchased
tethered downloads?
when you pay for music and own it bar are restricted to its use
SLR cameras?
single-lens reflex cameras - analog wave cameras
CCD arrays?
charge-coupled device array - an electronic sensor that captures images
fixed-lens cameras?
a digital camera that comes with a fixed lens
benifits of digital SLR cameras? (2)
- lets you switch among different lenses
2. full-frame image sensor - what captures the light
disadvantages of SLR cameras compared to fixed lens cameras (2)
- heavier
2. uses more battery power
5 factors that determine digital image quality
- lens quality
- image sensor size
- file format used
- color management software
- resolution
resolution?
number of data points it records for each image captured
MP?
megapixels
pixel?
picture element
standard camera resolution is?
12 to 20 MP
professional digital SLR camera resolution is
50.6 MP
most common file types for digital cameras are? (2)
- RAW - raw uncompressed data
2. JPEG - joint photographic experts group