IP cameras are Closed-circuit television (CCTV) cameras that use Internet Protocol to transmit image data and control signals over a Fast Ethernet link. As such, IP cameras are also commonly referred to as network cameras. IP cameras are primarily used for surveillance in the same manner as analog closed-circuit television. A number of IP cameras are normally deployed together with a digital video recorder (DVR) or a network video recorder (NVR) to form a video surveillance system.
A growing branch in CCTV is Internet Protocol Cameras (IP Cameras). IP cameras allow homeowners and businesses to view their camera(s) through any internet connection available through a computer or a 3G phone.
Internet Protocol is a protocol used for communicating data across a packet-switched network using the Internet Protocol Suite, also referred to as TCP/IP.
2 way audio allow users to communicate what they are seeing (e.g. Gas station clerk assisting a customer on how to use the prepay pumps).
LED lighting which is used for night vision. This feature gives users the ability to view low light areas, known as Night Vision.
Ability to view at a streaming rate, some IP cameras have a resolution of 640x480 and are able to record at 30 frames per second.
IP cameras are also able to function on a wireless network. Initial configuration has to be done through a router, however after the IP camera is installed it can then be used on the wireless network. ip camera help make iptv more enhanced (e.g. the video call and video chat through your ipchatting) Read more about: IP camera
Advanced Audio Coding (AAC) is a standardized, lossy compression and encoding scheme for digital audio. Designed to be the successor of the MP3 format, AAC generally achieves better sound quality than MP3 at similar bit rates.
AAC has been standardized by ISO and IEC, as part of the MPEG-2 and MPEG-4 specifications. The MPEG-2 standard contains several audio coding methods, including the MP3 coding scheme. AAC is able to include 48 full-bandwidth (up to 96 kHz) audio channels in one stream plus 16 low frequency effects (LFE, limited to 120 Hz) channels, up to 16 "coupling" or dialog channels, and up to 16 data streams. The quality for stereo is satisfactory to modest requirements at 96 kbit/s in joint stereo mode; however, hi-fi transparency demands data rates of at least 128kbit/s (VBR). The MPEG-2 audio tests showed that AAC meets the requirements referred to as "transparent" for the ITU at 128 kbit/s for stereo, and 320kbit/s for 5.1 audio.
AAC's best known use is as the default audio format of Apple's iPhone, iPod, iTunes, and the format used for all iTunes Store audio.
AAC is also the standard audio format for Sony's PlayStation 3 and is supported by Sony's Playstation Portable, latest generation of Sony Walkman, Walkman Phones from Sony Ericsson, Nseries Phones and the latest S40 models from Nokia, Android based phones, Nintendo's Wii (with the Photo Channel 1.1 update installed for Wii consoles purchased before late 2007), the Nintendo DSi, and the MPEG-4 video standard.
'High-Efficiency AAC' is part of digital radio standards like DAB+ and Digital Radio Mondiale. Read more about: AAC
Action Message Format or AMF is a binary format based loosely on the Simple Object Access Protocol (SOAP). It is used primarily to exchange data between an Adobe Flash application and a database, using a remote procedure call.
Each AMF message contains a body which holds the response, whether error message or data (such as arrays, objects, strings, numbers), which will be expressed as an ActionScript Object.
Typical usage from Adobe Flash Player, consists of an ActionScript program which:
1. Connects to a specific "gateway" URL on a web server
2. Accesses the service which handles AMF communication
3. Calls a remote method on the service, mentioning a "callback" method
4. Arguments passed are serialized to AMF and deserialized at the receiving end
5. The service processes the input, and optionally returns data via AMF
6. The callback method is invoked by the platform, and returned data is passed
Livestream, formerly known as Mogulus, is a live streaming video platform that allows users to view and broadcast video content with only a camera and a computer through the internet. It offers a free ad-supported service and multi-tiered premium services for organizations and media professionals.
Livestream also offers wireless HD broadcasting in the form of a device combination called Livepack, described as "a satellite television truck in a backpack."
In September 2009, Livestream started providing custom channel pages for special streaming video events like concerts from Pixie Lott and David Gray. These pages integrated live chat, Twitter, and Facebook. Livestream has been used to stream content by Gannett Newspapers and by the World Economic Forum, and some local TV affiliates, usually for local news and storm watch. Read more about: Livestream
Multi-user is a term that defines an operating system or application software that allows concurrent access by multiple users of a computer. Time-sharing systems are multi-user systems. Most batch processing systems for mainframe computers may also be considered "multi-user", to avoid leaving the CPU idle while it waits for I/O operations to complete. However, the term "multitasking" is more common in this context.
An example is a Unix server where multiple remote users have access (such as via Secure Shell) to the Unix shell prompt at the same time. Another example uses multiple X Window sessions spread across multiple terminals powered by a single machine - this is an example of the use of thin client.
Management systems are implicitly designed to be used by multiple users, typically one system administrator or more and an end-user community.
The complementary term, single-user, is most commonly used when talking about an operating system being usable only by one person at a time, or in reference to a single-user software license agreement. Multi-user operating systems such as Unix sometimes have a single user process available for emergency maintenance. Read more about: Multi-user