Instruct: Classify Amazon reviews into positive or negative sentiment
Query: comprehensive explanation

Perkins offers us a deep explanation of how RTP can handle real time audio and, more importantly, video across a standard Internet connection. RTP has now been around for some 10 years, and has been extensively built out, based on practical feedback from its earlier usages.As you might expect, much of the text concerns the packet formats used in RTP. There are subsidiary protocols within RTP, like its control protocol. Naturally, these are explained, as they are a necessary part of the overall RTP.Some chapters delve into specific timing issues. One, called lip synchronisation, refers to the difficulty of synchronising the audio and video portions of a video signal. Other chapters discuss how to conceal lost video packets. Error concealment is a very practical necessity in this field.