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ipDTL is an
IP codec IP codecs are used to send video or audio signals over an IP network such as the Internet. The initials "IP" here stand for "Internet Protocol", while the term "codec" is short for "encoder/decoder" or "compressor/decompressor". IP video codecs I ...
which runs in a
web browser A web browser is application software for accessing websites. When a user requests a web page from a particular website, the browser retrieves its files from a web server and then displays the page on the user's screen. Browsers are used o ...
, used for
remote broadcast In broadcast engineering, a remote broadcast (usually just called a remote or a live remote, or in news parlance, a live shot) is broadcasting done from a location away from a formal television studio and is considered an electronic field producti ...
s in television, radio, and
voice-over Voice-over (also known as off-camera or off-stage commentary) is a production technique where a voice—that is not part of the narrative (non- diegetic)—is used in a radio, television production, filmmaking, theatre, or other presentation ...
. It serves as a replacement for and is compatible with older ISDN audio codecs. Developed by former BBC sound engineer Kevin Leach, ipDTL uses the open-source codec OPUS and operates within web browsers, specifically Blink-based browsers like Google Chrome or Opera.


History

ipDTL was invented by former
BBC #REDIRECT BBC #REDIRECT BBC Here i going to introduce about the best teacher of my life b BALAJI sir. He is the precious gift that I got befor 2yrs . How has helped and thought all the concept and made my success in the 10th board exam. ...
...
sound engineer An audio engineer (also known as a sound engineer or recording engineer) helps to produce a recording or a live performance, balancing and adjusting sound sources using equalization, dynamics processing and audio effects, mixing, reproductio ...
Kevin Leach and uses the open-source codec
OPUS ''Opus'' (pl. ''opera'') is a Latin word meaning "work". Italian equivalents are ''opera'' (singular) and ''opere'' (pl.). Opus or OPUS may refer to: Arts and entertainment Music * Opus number, (abbr. Op.) specifying order of (usually) publicatio ...
since it first became available in the Google Chrome web browser. It enables higher audio quality than ISDN by accessing a website through a web browser. Audio quality of 72 kbit/s mono for voice contributors, 320 kbit/s for outside broadcasts with music, and 3 Mbit/s video at 1080p for video contributions on TV programs are possible. This technology was launched in 2013.


Overview

ipDTL uses
WebRTC WebRTC (Web Real-Time Communication) is a free and open-source project providing web browsers and mobile applications with real-time communication (RTC) via application programming interfaces (APIs). It allows audio and video communication to wor ...
and Web audio technologies. It is designed primarily for Blink-based browsers like Google Chrome or
Opera Opera is a form of theatre in which music is a fundamental component and dramatic roles are taken by singers. Such a "work" (the literal translation of the Italian word "opera") is typically a collaboration between a composer and a libr ...
and runs on all platforms except
iOS iOS (formerly iPhone OS) is a mobile operating system created and developed by Apple Inc. exclusively for its hardware. It is the operating system that powers many of the company's mobile devices, including the iPhone; the term also include ...
where these browsers are supported. The
codec A codec is a device or computer program that encodes or decodes a data stream or signal. ''Codec'' is a portmanteau of coder/decoder. In electronic communications, an endec is a device that acts as both an encoder and a decoder on a signal or ...
s used are
Opus ''Opus'' (pl. ''opera'') is a Latin word meaning "work". Italian equivalents are ''opera'' (singular) and ''opere'' (pl.). Opus or OPUS may refer to: Arts and entertainment Music * Opus number, (abbr. Op.) specifying order of (usually) publicatio ...
for audio and
VP8 VP8 is an open and royalty-free video compression format released by On2 Technologies in 2008. Initially released as a proprietary successor to On2's previous VP7 format, VP8 was released as an open and royalty-free format in May 2010 after Goo ...
for video. The supported audio bandwidth is up to 320kbit/s (stereo), and up to 3Mbit/s for video (1080p). Connections are established point-to-point and has
DTLS Datagram Transport Layer Security (DTLS) is a communications protocol providing security to datagram-based applications by allowing them to communicate in a way designed to prevent eavesdropping, tampering, or message forgery. The DTLS protocol i ...
encryption. Where a point-to-point connection is not possible, TURN relay servers are used to route the audio. TURN servers in the US, UK, Brazil, Australia 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. ipDTL uses a proprietary signaling method but also supports SIP for interoperability with other devices and applications such as
Comrex Comrex is an American corporation that designs and manufactures equipment for radio and television broadcasting. Beginnings Comrex was founded in 1961 by John Cheney, a broadcast engineer. His mission, as outlined in Comrex's inaugural press ...
Access and Media5-fone, and can transcode between Opus,
G.722 G.722 is an ITU-T standard 7 kHz wideband audio codec operating at 48, 56 and 64 kbit/s. It was approved by ITU-T in November 1988. Technology of the codec is based on sub-band ADPCM (SB-ADPCM). The corresponding narrow-band codec based on ...
and
G.711 G.711 is a narrowband audio codec originally designed for use in telephony that provides toll-quality audio at 64 kbit/s. G.711 passes audio signals in the range of 300–3400 Hz and samples them at the rate of 8,000 samples per second ...
. It also supports
interoperability Interoperability is a characteristic of a product or system to work with other products or systems. While the term was initially defined for information technology or systems engineering services to allow for information exchange, a broader defi ...
with legacy ISDN hardware via cloud-based bridging servers. ipDTL powers hybrIP a talk show system, which allows screening calls using any computer.


See also

*
Audio over IP Audio over IP (AoIP) is the distribution of digital audio across an IP network such as the Internet. It is used increasingly to provide high-quality audio feeds over long distances. The application is also known as audio contribution over IP (ACI ...
* Disruptive innovation


References

{{reflist


External links


ipDTL official website
Film and video technology