Explain how a jitter buffer permits the playback of an audio stream even if the Internet introduces jitter.
What will be an ideal response?
The implementation of a jitter buffer is straightforward. A receiver maintains a list of data
items, and uses timestamps to order the list. Before it begins playback, a receiver delays for d time
units, which means the data being played is d time units behind the data that is arriving. Thus, if a
given packet is delayed less than d, the contents of the packet will be placed in the buffer before it is
needed for playback. In other words, items are inserted into a jitter buffer with some variation in rate,
but the playback process extracts data from a jitter buffer at a fixed rate.
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