The purpose of the document is to examine whether accuracies
\nachievable by currently available synchronization methods in IP
\nnetworks are adequate to ensure end user's quality of service
\nexpectation for a particular multimedia service. This TSB will
\ndiscuss the issues related to interstream synchronization when all
\nthe concerned media are offered using:<\/p>\n
\u2022 IP networks from end-to-end;<\/p>\n
\u2022 A combination of TDM and IP networks.<\/p>\n
Services that will be covered, but not limited to:<\/p>\n
\u2022 Video conferencing: uses video and voice;<\/p>\n
\u2022 White boarding: uses data and voice.<\/p>\n
When a multimedia service is offered in an IP-based network, the
\nplay-out mechanism involves demultiplexing of different media in
\nend node and subsequent play-out of the media based on the timing
\ninformation carried over by the media. Depending on this timing
\ninformation, one media may precede the other resulting in user
\ndissatisfaction. For each media, the timing relationship between
\ndifferent packets (intra-stream synchronization) is preserved by
\nproper presentation at the end user in which play-out buffer
\nmanagement plays a crucial part. Size of the play-out buffer can be
\na fixed value or can be adaptively set based on one way delay
\nmeasurement using timestamps.<\/p>\n
This document gives an overview of synchronization methods by
\ntime stamping and the other means that are available to IP-based
\nreal-time applications and the effect of these methods on service
\nperformance as experienced by end user. However, actual
\nimplementation of time stamping is outside the scope of this TSB.
\nThe reference point at which inter-stream synchronization will be
\nexamined is considered to be at the interface of the end device
\ninvolved, where the play-out buffers are normally located.<\/p>\n","protected":false},"excerpt":{"rendered":"
Telecommunications – IP Telephony Infrastructures – Synchronization in IP Networks-Methods and User Perception<\/b><\/p>\n\n\n
\n Published By<\/td>\n Publication Date<\/td>\n Number of Pages<\/td>\n<\/tr>\n \n TIA<\/b><\/a><\/td>\n 2007<\/td>\n 40<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":690142,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2646],"product_tag":[],"class_list":{"0":"post-690130","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-tia","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/690130","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/690142"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=690130"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=690130"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=690130"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}