Protocols

Question

Which protocol is most appropriate for the situation described below .
 

High Defnition Video streaming

• TCP
• UDP
• FTP
• SMTP

Answer 1

High Definition (720p) or Full HD (1080p) means there are 720 and 1080 pixels on the horizontal axis. The more the number of pixels better the image appears to the eye. (Retina display on MAC has 2880p and it is supposed to be the maximum human eye can distinguish, but for larger screens, more pixels are always better like 4K (4096p) on modern TVs).

Now, the streaming protocol is not much dependent on the resolution. If some frames are lost, there might be some quality loss -- but the resolution remains the same. It is like we see 9 quality images in sequence instead of 10.

So, the answer would be UDP as streaming protocols are usually designed for UDP. Look at this example from Forouzan book

https://stackoverflow.com/questions/6187456/tcp-vs-udp-on-video-stream

Answer 2

tcp will be used. in low-quality video, it dosen't matter 1 or 2 frame get lost. but in high quality it matters. Tcp is connection orinted while udp is not so Tcp will be used.

Comments

Actually this question has been bugging me for a long time. I have seen some answers saying that in Video Streaming for HD TCP is used and for non-HD UDP is used because in non-HD it does not matter if we loose couple of frames. My question is why does not it matter? I have never seen any Video Streaming where while watching in non-HD the video felt jumpy even a little bit. If you loose frame you will see jump cut, may be slight if just 3-4 frames but you can clearly notice the problem. Then how can we say non-HD uses UDP?

Please help.

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See the accepted answer.

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Got it. Thank You very much sir.

Answer 3

UDP , BY EXAMPLE OF VIDEO