| 词条 | IpDTL |
| 释义 |
HistoryipDTL was invented by former BBC sound engineer Kevin Leach and utilizes the open-source codec OPUS since it first became available in the Google Chrome Web browser.[3] It enables higher audio quality than ISDN by accessing a website through a web browser.[1] Audio quality of 72 kbit/s mono for voice contributors[4], 320 kbit/s for outside broadcasts with music, and 3 Mbit/s video at 1080p for video contributions on TV programs are possible.[1] Leach launched the technology in 2013 as an initially free service for radio stations, but shifted to a subscription model shortly after.[5] OverviewipDTL utilizes the WebRTC and Web audio technologies. It is designed primarily for Blink-based browsers like Google Chrome or Opera and runs on all platforms except iOS where these browsers are supported. The codecs used are Opus for audio and VP8 for video. The supported audio bandwidth is up to 320kbit/s (stereo), and up to 3Mbit/s for video (1080p).[1] Connections are DTLS-encrypted and established point-to-point.[3] Where a point-to-point connection is not possible, TURN relay servers are used to route the audio. TURN servers in the US, UK and Japan are available, with an independent backup system being maintained at ipdtl2.com. Connections can also be made through a special URL that allows users to access another account and connect with it.[1] ipDTL uses a proprietary signaling method but also supports SIP for interoperability with other devices and applications such as Comrex Access and Media5-fone, and can transcode between Opus, G.722 and G.711.[6] This also allows for interoperability with legacy ISDN hardware via cloud based bridging servers.[7] See also
References1. ^1 2 3 4 {{cite news|last1=Sparrow|first1=Mark|title=Could ipDTL spell the end of ISDN for broadcasting and voiceovers?|url=https://www.forbes.com/sites/marksparrow/2014/11/12/could-ipdtl-spell-the-end-of-isdn-for-broadcasting-and-voiceovers/|accessdate=17 February 2015|publisher=Forbes|date=12 November 2014}} 2. ^{{cite web|title=Interview: Kevin Leach, In:Quality - remote broadcasting|url=http://asiaradiotoday.com/2013/11/interview-kevin-leach-inquality-talks-remote-broadcasting/|website=Asia Radio Today|accessdate=17 February 2015}} 3. ^1 {{cite news|last1=Jackson|first1=Will|title=Cheap, easy remotes via Internet|url=http://www.radioworld.com/article/cheap-easy-remotes-via-internet/273301|accessdate=17 February 2015|publisher=Radio World|date=14 November 2014}} 4. ^{{cite web|last1=Williams|first1=Neil|title=How to do a voiceover using ipDTL|url=http://neilwilliamsvoiceover.com/how-to-do-a-voiceover-using-ipdtl/|website=Neil Williams Voice Over Artist|accessdate=19 April 2017}} 5. ^{{cite web|last1=Martin|first1=Roy|title=Technical Innovation Award for InQuality|url=http://radiotoday.co.uk/2013/10/technical-innovation-award-for-inquality/|website=Radio Today|accessdate=17 February 2015}} 6. ^{{cite news|last1=Cunningham|first1=Steve|title=Test Drive: ISDN Replacements - ipDTL|url=https://rapmag.com/index.php/archives/2010s/355-14/apr14/2426-test-drive-isdn-replacements-ipdtl|accessdate=17 February 2015|publisher=Radio and Production Magazine|date=1 April 2014}} 7. ^{{cite news|last1=King|first1=Rana|title=ISDN with ipDTL for Voice Over Actors Now Possible|url=http://www.voiceoverherald.com/isdn-with-ipdtl-for-voice-over-actors-now-possible/|accessdate=1 September 2016|publisher=Voice Over Herald|date=13 October 2015}} External links
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