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Ravenna is a technology for real-time transport of audio and other media data in IP-based network environments, which was introduced to the public on Sep. 10, 2010 at the International Broadcasting Convention in Amsterdam. Ravenna can operate on most existing network infrastructures using standard networking technology. Performance and capacity scale with network performance. Ravenna is designed to match broadcasters' requirements for low latency, full signal transparency and high reliability. Fields of application include (but are not limited to): in-house signal distribution for broadcasting houses and other fixed installations, flexible setups at venues and live events, outside broadcasting support, and inter-studio links across wide area network links and production facilities. == Standard protocols == Ravenna is an IP-based solution. As such it is based on protocol levels at or above layer 3 of the OSI reference model. All protocols and mechanisms used within Ravenna are based on widely deployed and established standards: * Streaming is based on the well-established RTP / RTCP protocols with payload formats defined by various RFCs (i.e. RFC 3550, RFC 3551 et al.). * Both unicast and multicast are supported on a per-stream basis. * Stream management and connection is achieved through SDP or RTSP protocol. * QoS is based on DiffServ mechanism * Device configuration and discovery is executed through the use of DHCP / DNS services or zeroconf mechanisms. * Low-level device configuration is accomplished through independent web services via http protocol. * Time synchronization is maintained via PTPv2 (IEEE 1588-2008). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ravenna (networking)」の詳細全文を読む スポンサード リンク
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