Spring 2012

Spring 2012
by ani

Submit your Photo
Hall of Fame

Please participate in Meta
and help us grow.

Photography Stack Exchange is a question and answer site for professional, enthusiast and amateur photographers. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

What is the technical term for the time taken to see the final image on an IP camera's screen?

Is it dependent on some parameter which I can look for?

Actually this website has listed various parameters, but I can't make out whether above is listed out there or not?


share|improve this question

closed as off topic by mattdm, whuber, Rowland Shaw Feb 15 '12 at 16:57

Questions on Photography Stack Exchange are expected to relate to photography within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.

You should mention in your question that you are talking about IP cameras. – eWolf Oct 28 '11 at 9:37
@eWolf Done it. Now, any helps? – TheIndependentAquarius Oct 28 '11 at 9:43
I don't think security cameras are on topic. – mattdm Oct 28 '11 at 11:50
@mattdm It is mentioned in the FAQ/rules? – TheIndependentAquarius Oct 28 '11 at 12:26
But the site isn't all-about-cameras-for-any-purpose.stackexchange.com. After all, videography and cinema questions are not on topic. I think it's really important to keep the focus on photography. In this case, since the issue has a lot to do with computer power and computer networking, it seems clearly out of the gray area. Now, if you can explain that you're using the security camera for an avant-garde portrait project, then it'd be back on the other side. – mattdm Oct 28 '11 at 12:42
up vote 6 down vote accepted

The word you are looking for is Latency.

Latency is a measure of time delay experienced in a system, the precise definition of which depends on the system and the time being measured. Latencies may have different meaning in different contexts.
Satellite transmission
This is best illustrated when a newsreader in a studio talks to a reporter half way around the world. The signal travels from the newsreader via communication satellite situated in geosynchronous orbit to the reporter and then goes all the way back to geosynchronous orbit and then to the studio, resulting in a journey of over one hundred thousand kilometers . This time lag is easily noticeable. Even though the signal travels at the speed of light, it still requires about half a second to travel that distance (not including the much smaller latencies inside the communications equipment).

Lag is also an acceptable substitute, though it is considerably more informal.

Lag is a common word meaning to fail to keep up or to fall behind. In real-time applications, the term is used when the application fails to respond in a timely fashion to inputs.
The term lag is often also used as a synonym for communication latency. This can be misleading because there can be other causes for the symptom.

It's worth noting that the video latency of IP cameras is not entirely due to the camera itself. Depending on the intervening network, network latency can actually produce the majority of the delay in the signal.

share|improve this answer
Thanks for the detailed answer. – TheIndependentAquarius Nov 1 '11 at 7:06

Not the answer you're looking for? Browse other questions tagged or ask your own question.