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ILBC
Internet Low Bitrate Codec (iLBC) is a royalty-free narrowband speech audio coding format and an open-source reference implementation (codec), developed by Global IP Solutions (GIPS) formerly Global IP Sound (acquired by Google Inc in 2011). It was formerly freeware with limitations on commercial use, but since 2011 it is available under a free software/open source ( 3-clause BSD license) license as a part of the open source WebRTC project. It is suitable for VoIP applications, streaming audio, archival and messaging. The algorithm is a version of block-independent linear predictive coding, with the choice of data frame lengths of 20 and 30 milliseconds. The encoded blocks have to be encapsulated in a suitable protocol for transport, usually the Real-time Transport Protocol (RTP). iLBC handles lost frames through graceful speech quality degradation. Lost frames often occur in connection with lost or delayed IP packets. Ordinary low-bitrate codecs exploit dependencies betwee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Global IP Solutions
Global IP Solutions (also known as GIPS) was a United States-based corporation that developed real-time voice and video processing software for IP networks, before it was acquired by Google in May 2010. The company delivered embedded software that enabled real-time communications capabilities for video and voice over IP (VoIP). GIPS was perhaps best known for developing the narrowband iLBC and wideband iSAC speech codecs. GIPS software was generally delivered as “engines” that packaged together voice and video processing components for smoother integration and better performance. GIPS’ customers are primarily service providers, application developers, and manufacturers of IP phones, gateways or voice and video conferencing systems. History The company (formerly known as Global IP Sound) was founded in July 1999 in Stockholm, Sweden by signal processing experts Roar Hagen (then GIPS’ CTO) and Bastiaan Kleijn (then GIPS’ Chief Scientist), Espen Fjogstad and Ivar T. Ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 work inside web pages by allowing direct peer-to-peer communication, eliminating the need to install plugins or download native apps. Supported by Apple, Google, Microsoft, Mozilla, and Opera, WebRTC specifications have been published by the World Wide Web Consortium (W3C) and the Internet Engineering Task Force (IETF). According to the webrtc.org website, the purpose of the project is to "enable rich, high-quality RTC applications to be developed for the browser, mobile platforms, and IoT devices, and allow them all to communicate via a common set of protocols". History In May 2010, Google bought Global IP Solutions or GIPS, a VoIP and videoconferencing software company that had developed many components required for RTC, such as codec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ekiga
Ekiga (formerly called GnomeMeeting) is a VoIP and video conferencing application for GNOME and Microsoft Windows. It is distributed as free software under the terms of the GNU GPL-2.0-or-later. It was the default VoIP client in Ubuntu until October 2009, when it was replaced by Empathy. Ekiga supports both the SIP and H.323 (based on OPAL) protocols and is fully interoperable with any other SIP compliant application and with Microsoft NetMeeting. It supports many high-quality audio and video codecs. Ekiga was initially written by Damien Sandras in order to graduate from the University of Louvain (UCLouvain). It is currently developed by a community-based team led by Sandras. The logo was designed based on his concept by Andreas Kwiatkowski. Ekiga.net was also a free and private SIP registrar, which enabled its members to originate and terminate (receive) calls from and to each other directly over the Internet. The service was discontinued at the end of 2018. Features Feature ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gizmo5
Gizmo5 (formerly known as Gizmo Project and SIPphone) was a voice over IP communications network and a proprietary freeware soft phone for that network. On November 12, 2009, Google announced that it had acquired Gizmo5. On March 4, 2011, Google announced that the service would be discontinued as of April 3, 2011. The Gizmo5 network used open standards for call management, Session Initiation Protocol (SIP) and Extensible Messaging and Presence Protocol (XMPP). However, the Gizmo5 client application was proprietary software and used several proprietary codecs, including GIPS and Internet Speech Audio Codec (iSAC). History Gizmo Project was founded by Michael Robertson and his company SIPphone. On November 12, 2009, Google announced that it had acquired Gizmo5 for a reported $30 million in cash. Prior to this acquisition, Gizmo5 had a working relationship with GrandCentral (now Google Voice) for years. Upon announcement, Gizmo5 suspended new signups until a Google relaunch. G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VoIP
Voice over Internet Protocol (VoIP), also called IP telephony, is a method and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. The terms Internet telephony, broadband telephony, and broadband phone service specifically refer to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the Internet, rather than via the public switched telephone network (PSTN), also known as plain old telephone service (POTS). Overview The steps and principles involved in originating VoIP telephone calls are similar to traditional digital telephony and involve signaling, channel setup, digitization of the analog voice signals, and encoding. Instead of being transmitted over a circuit-switched network, the digital information is packetized and transmission occurs as IP packets over a packet-switched network. They transport media streams using special media delivery protocol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
QuteCom
QuteCom (previously called WengoPhone) was a free-software SIP-compliant VoIP client developed by the QuteCom (previously OpenWengo) community under the GPL-2.0-or-later license. It allows users to speak to other users of SIP-compliant VoIP software at no cost. It also allows users to call landlines and cell phones, send SMS and make video calls. None of these functions are tied to a particular provider, allowing users to choose among any SIP provider. History Development on WengoPhone began in September 2004. The first published version was released as version 0.949. A next-generation version of WengoPhone (WengoPhone NG) began development in 2005. The last release of WengoPhone before the change to QuteCom was version 2.1.2. A WengoPhone Firefox plug-in has also been published, which is currently available on Mac OS X and Microsoft Windows, with a Linux version under development. On 28 January 2008, Wengo, the original sponsor of WengoPhone, transferred the sponsorship of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BSD Licenses
BSD licenses are a family of permissive free software licenses, imposing minimal restrictions on the use and distribution of covered software. This is in contrast to copyleft licenses, which have share-alike requirements. The original BSD license was used for its namesake, the Berkeley Software Distribution (BSD), a Unix-like operating system. The original version has since been revised, and its descendants are referred to as modified BSD licenses. BSD is both a license and a class of license (generally referred to as BSD-like). The modified BSD license (in wide use today) is very similar to the license originally used for the BSD version of Unix. The BSD license is a simple license that merely requires that all code retain the BSD license notice if redistributed in source code format, or reproduce the notice if redistributed in binary format. The BSD license (unlike some other licenses e.g. GPL) does not require that source code be distributed at all. Terms In additi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linear Predictive Coding
Linear predictive coding (LPC) is a method used mostly in audio signal processing and speech processing for representing the spectral envelope of a digital signal of speech in compressed form, using the information of a linear predictive model. LPC is the most widely used method in speech coding and speech synthesis. It is a powerful speech analysis technique, and a useful method for encoding good quality speech at a low bit rate. Overview LPC starts with the assumption that a speech signal is produced by a buzzer at the end of a tube (for voiced sounds), with occasional added hissing and popping sounds (for voiceless sounds such as sibilants and plosives). Although apparently crude, this Source–filter model is actually a close approximation of the reality of speech production. The glottis (the space between the vocal folds) produces the buzz, which is characterized by its intensity (loudness) and frequency (pitch). The vocal tract (the throat and mouth) forms the tub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cisco
Cisco Systems, Inc., commonly known as Cisco, is an American-based multinational digital communications technology conglomerate corporation headquartered in San Jose, California. Cisco develops, manufactures, and sells networking hardware, software, telecommunications equipment and other high-technology services and products. Cisco specializes in specific tech markets, such as the Internet of Things (IoT), domain security, videoconferencing, and energy management with leading products including Webex, OpenDNS, Jabber, Duo Security, and Jasper. Cisco is one of the largest technology companies in the world ranking 74 on the Fortune 100 with over $51 billion in revenue and nearly 80,000 employees. Cisco Systems was founded in December 1984 by Leonard Bosack and Sandy Lerner, two Stanford University computer scientists who had been instrumental in connecting computers at Stanford. They pioneered the concept of a local area network (LAN) being used to connect distant co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polycom IP Phone
Poly, formerly Polycom, a part of HP Inc., is an American multinational corporation that develops video, voice and content collaboration and communication technology. Polycom was co-founded in 1990 by Brian L Hinman and Jeffrey Rodman. In 2018 Polycom was acquired by Plantronics and in 2019 the name of the combined entity was changed to Poly. In 2022, it was sold onwards to HP. History Polycom was co-founded in 1990 by Brian L Hinman and Jeffrey Rodman, who were colleagues at PictureTel Corp. The startup was based in San Francisco, California but soon moved to San Jose, California, with Hinman using $400,000 of his own money and $100,000 from friends as seed money. Oak Investment Partners and Accel Partners then contributed an additional $3 million in venture capital. Polycom's stated goal was to develop solutions for all the major ways people communicate, specifically including audio, content such as documents, and video. Its first products to market were audio confe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nokia N810
The Nokia N810 Internet tablet is an Internet appliance from Nokia, announced on 17 October 2007 at the Web 2.0 Summit in San Francisco. Despite Nokia's strong association with cellular products, the N810, like preceding tablets produced by Nokia, was not a phone, but instead allowed the user to browse the Internet and communicate using Wi-Fi networks or with a mobile phone via Bluetooth. It built on the hardware and software of the Nokia N800 with some features added and some removed. The Nokia N810 featured the Maemo Linux distribution operating system based on Maemo 4.0, which featured MicroB (a Mozilla-based mobile browser), a GPS navigation application, new media player, and a refreshed interface. Major changes from the N800 The Nokia N810 had much in common with the N800 and Internet Tablet OS 2008 operated on both, but there were some significant differences between the two. Here are the new features in the Nokia N810: * Sliding, backlit keyboard * Front-facing webc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nokia N800
The Nokia N800 Internet tablet is a wireless Internet appliance from Nokia, originally announced at the Las Vegas CES 2007 Summit in January 2007. N800 allows the user to browse the Internet and communicate using Wi-Fi networks or with mobile phone via Bluetooth. The N800 was developed as the successor to the Nokia 770. It includes FM and Internet radio, an RSS news reader, image viewer and a media player for audio and video files. Specifications * Processor: OMAP2420 microprocessor with a native speed of 400 MHz ** Runs at an underclocked 330 MHz on OS2007, because the DSP speed will be halved if run at full speed ** Runs at the native 400 MHz on OS2008. * Memory: 128 MiB of RAM and 256 MiB of flash memory. * Connectivity: IEEE 802.11 b/g, Bluetooth 2.0 ( DUN, OPP, FTP, HFP, HID profiles as well as A2DP/AVRCP and PAN via third party emulation), and USB 2.0 OTG high-speed. * Display & resolution: pressure-sensitive resistive touch-sc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
