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www.nvnews.net/vbulletin/showthread.php?t=123786
Posted by crouse
www.edaboard.com/search,clock-latency.html
Posted by crouse
In general term Delay and latency are similar terms that refer to the amount of time it takes a bit to be transmitted from source to destination. Jitter is delay that varies over time. One way to view latency is how long a system holds on to a packet. That system may be a single device like a router, or a complete communication system including routers and links.
Posted by HamidAliKhan
Latency is the total time from transmission to reception. It is composed of the sum of several delays:
• Propagation Delay - Total time needed to be transmitted over wires (negligible in most cases)
• Serialization Delay - A packet cannot be processed until all of it is in the receive buffer. That time is controlled by the link speed and the length of the packet: Delay = Speed of one octet * Total Octets. You can lower serialization delay by either passing them over faster links or shortening them. Compressed RTP (cRTP) can reduce a 40 byte IP/RTP/UDP header to 2 to 4 bytes
• Processing Delay - The amount of time, a packet sits in one device waiting to be passed on. Composed of:
• Decoding and Classifying - The more a packet has to be processed and the higher the level on the TCP/IP model, the longer it will take. Speed of the Processor can be a considerable factor
• Queuing Delay - When one packet has to wait behind another to be processed or transmitted. This is the basis for most Quality of Service (QOS) methods.
Posted by yogendra
Delay and latency are similar terms that refer to the amount of time it takes a bit to be transmitted from source to destination. Jitter is delay that varies over time. One way to view latency is how long a system holds on to a packet. That system may be a single device like a router, or a complete communication system including routers and links.
Posted by sagitraz
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