Editing ISDN (section)

=== Video conferencing ===

One of ISDNs successful use-cases was in the [[videoconference]] field, where even small improvements in data rates are useful, but more importantly, its direct end-to-end connection offers lower latency and better reliability than packet-switched networks of the 1990s. The [[H.320]] standard for [[audio coding]] and [[video coding]] was designed with ISDN in mind, and more specifically its {{nowrap|64 kbit/s}} basic data rate. including [[audio codecs]] such as [[G.711]] ([[Pulse-code modulation|PCM]]) and [[G.728]] ([[CELP]]), and [[discrete cosine transform]] (DCT) [[video codecs]] such as [[H.261]] and [[H.263]].<ref>{{cite news |last1=Davis |first1=Andrew |title=The H.320 Recommendation Overview |url=https://www.eetimes.com/document.asp?doc_id=1275886 |access-date=7 November 2019 |work=[[EE Times]] |date=13 June 1997 |archive-date=2 January 2016 |archive-url=https://web.archive.org/web/20160102055138/http://www.eetimes.com/document.asp?doc_id=1275886 |url-status=live }}</ref><ref>{{cite book |title=IEEE WESCANEX 97: communications, power, and computing : conference proceedings |date=May 22–23, 1997 |publisher=[[Institute of Electrical and Electronics Engineers]] |location=University of Manitoba, Winnipeg, Manitoba, Canada |isbn=9780780341470 |page=30 |url=https://books.google.com/books?id=8vhEAQAAIAAJ |quote=H.263 is similar to, but more complex than H.261. It is currently the most widely used international video compression standard for video telephony on ISDN (Integrated Services Digital Network) telephone lines.}}</ref>