42. Seek Latency Seek time is the time taken for a hard disk controller to locate a specific piece of stored data. Other delays include transfer time (data rate) and rotational delay (latency). Q) What is the use of Multimedia? Business (Bank, Super market) Education (University, College, School) Entertainment (Movie, Music,…) Home (desktop, laptop, tv,) Public Places (airport, ) Q) Write the difference between HyperText and HyperMedia .
Hypertext is a text which contains links to other texts. Examples: INTRODUCTION TO MULTIMEDIA Cached Similar HyperMedia include other media, e.g., graphics, images, and specially the continuous media – sound and video. Hypertext is a text which contains links to other texts. ( True /False) Hypertext is not a text which contains links to other texts. (True/ False ) System Administrator Programmer Data entry operator System Analyst System Engineer Software Engineer What are the Components of a Multimedia System ? Water H 2 O Longitudinal waves [ Compression, Rarefaction ] Transverse wave [ Crust, Trough ] Amplitude Wavelength Period means time T=1/F [ inversely proportional ]
F=1/T Car speed Speed inversely proportional to time SPEED=1/TIME 100 KM IN 2 HOURS 100 KM IN 1 HOUR 100 KM 3 HOURS Frequency of light wave is 50 cycles per second. Period, Frequency & Amplitude Hz (Hertz) is a measure of frequency f (number of cycles (times) a wave repeats itself per second). If the frequency of a signal is 2Hz, then 2 cycles of the wave are completed per second Period T, measured in seconds (s) is the time it takes to complete one cycle of the wave Frequency and period are Inversely Proportional : T=1/f f=1/T If the frequency of the signal is 2Hz, then the period is 0.5 s (i.e. it takes 0.5 seconds for the wave to complete one cycle)
f=1/T T=1/f=1/2=0.5 seconds If the frequency of the signal is 4 Hz, then the period is 0.25 s (i.e. it takes 0.5 seconds for the wave to complete one cycle) T=1/f=1/4= 0.25 seconds If T=10 ms . What if frequency? Frequency : f=1/(10x10 -3 )=100 Hz T=10 ms=10 milliseconds =10X10 -3 seconds 1) T= 10 ms=10X10 -3 s F=1/T Hz F=1/(10X10 -3 ) Hz =1/10 -2 Hz= 1X10 2 Hz=100 Hz F=100 Hz 2) T=5 ms=5X10 -3 s. Calculate frequency f. F=1/T=1/(5X10 -3 ) Hz F=0.2X10 3 =0.2X1000=200.0 Hz=200 Hz A 512x512 Grey scale image takes up 1/4 MBytes, A 512x512 24 bit image takes 3/4 MBytes with no compression . Hw Example: In a digital telephone system, the speech signal is sampled
8,000 K Hz. What is the sampling period? Q1) What is the sampling frequency for no loss of information ? • For no loss of information: Sampling frequency ≥ 2 * maximum signal frequency. Signal interference Q2) How to digitize the sound? Explain with the help of a diagram.
Dropbox Dropbox is a similar smart phone application to Evernote. If you want to have mobile access to documents, photos, etc. that reside on your computer, simply drag the item to a Dropbox folder, and you'll be able to view, edit and share via your smart phone. Because it uses the cloud, any revisions you make while using your smartphone will be visible when you access Dropbox from your computer or other mobile device.
You've reached the end of your free preview.
Want to read all 30 pages?
- Fall '19