| Alexander Fraser, Peter Onufryk, and K. K. Ramakrishnan. Encapsulation of Real-Time Data Including RTP Streams over ATM, February 1998. |
....design changes resulting from the availability of high speed links. The project uses RTP packets embedded with AAL5 packets. AAL5 has an 8 byte trailer irrespective of the payload size. This overhead can be reduced by using the trailer bytes to store RTP header bytes which may be compressed [11]. Thus, the overall overhead bytes within the packets can be reduced. The implementation directly uses ATM sockets assuming pure ATM networks. This is an idealistic view of the network since IP networks exist universally. It will be interesting to see how RTP IP AAL5 combination works and how ....
Alexander Fraser, Peter Onufryk, and K. K. Ramakrishnan. Encapsulation of Real-Time Data Including RTP Streams over ATM, February 1998.
....use the Real Time Transport Protocol [RTP] in conjunction with UDP and IP. TOPS defines an encapsulation that is efficient for transporting real time data, while retaining flexibility. The TOPS encapsulation influenced the design of the Real Time AAL5 protocol being standardized in the ATM Forum [FRA98] and ITU. 8.2 H.323 The ITU H.323 series of recommendations define protocols for multimedia communications including voice telephony. Within the H.323 framework, H.245 is used for logical channel management and capability negotiation; H.225.0 is used for call control as well as registration, ....
A.G. Fraser, P.Z. Onufryk and K.K. Ramakrishnan, "Encapsulation of Real-Time Data Including RTP Streams over ATM", ATM Forum contribution SAA-98-0139, February 1998. URL: http://www.research.att.com/~kkrama/papers/atm_98-0139.pdf
....to the audio compression module for coding. Finally, once a fixed number of coded samples are available, they are passed to the network interface module where they are encapsulated in a packet and transmitted on the network. We currently employ a simple encapsulation similar to that described in [4] but in the future other encapsulations, such as RTP [20] may be used. The network interface module receives audio packets from the network, decapsulates them, determines if any packets were lost, and passes the audio data in IObufs as EVX events to the audio decompressor module. There the audio ....
A. Fraser, P. Z. Onufryk, K. K. Ramakrishnan, "Encapsulation of Real-Time Data Including RTP Streams over ATM", Included in H.323 Media Transport Over ATM Living List of Issues in the ATM Forum, February 1998
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