l17_march21 - Lecture 17 March 21, 2002 Content-delivery...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Lecture 17 – March 21, 2002 Content-delivery services. Multimedia services Reminder next week individual meetings and project status report are due.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 E d g e R o u t e r E d g e R o u t e r E d g e R o u t e r E d g e R o u t e r E d g e R o u t e r E d g e R o u t e r L o c a l IS P L o c a l IS P L o c a l IS P L o c a l IS P L o c a l IS P L o c a l IS P C o n t e n t P r o v id e r C o n t e n t D e liv e r y C o n t e n t D e liv e r y C o n t e n t D e liv e r y C o n t e n t D e liv e r y C o n t e n t D e liv e r y Content-delivery services
Background image of page 2
3 Multimedia Services Voice over IP Still images Audio broadcast Video broadcast Video on demand Teleconferencing Videoconferencing Remote instrumentation Telemedicine
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 Analog and Digital Information Sampling – Nyquist theorem Quantization – quantization noise Examples: voice – sampling rate 8,000 samples/sec 8 bits/sample-256 quantization levels music – sampling rate 48,000 samples/sec 16 bits/sample color video – 10,000,000 samples/sec 24 bits/sample
Background image of page 4
5 Timing requirements for data streaming Interactive service – voice over IP, teleconferencing delay and jitter sensitive but loss tolerant Video streaming rate sensitive and to some extent loss tolerant. 25 frames/sec Telemedicine and remote instrument control delay and loss sensitive Stored media applications – video on demand less strict/demanding
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6 Delay and Jitter Play-out delay End-to-end delay Delay at the sender Data transmission and propagation delay Delay at the receiver Jitter – variability of end to end delay For a normal conversation – play out delay < 100 msec not noticeable < 400 msec acceptable > 400 msec not acceptable
Background image of page 6
7 Delay and Jitter a g t a s t b g t a p t a r t g e n e r a t io n t im e r e c e p t io n t im e p la y b a c k t im e b s t s e n d in g t im e p a c k e t s b a b r t b p t t im e
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
8
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 27

l17_march21 - Lecture 17 March 21, 2002 Content-delivery...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online