1. Digital television systems - (DTS)
Lecture 8
IPTV
Videostreaming
Technical Univ. of Kosice
Faculty of Electrical Engineering and Informatics
Lˇ. Maceková, 2017

2. IPTV
Internet Protocol television (IPTV) is the delivery of television content over Internet Protocol (IP) networks. This is in contrast to delivery through traditional terrestrial, satellite, and cable television formats. Unlike downloaded media, IPTV offers the ability to stream the source media continuously. As a result, a client media player can begin playing the content (such as a TV channel) almost immediately. This is known as streaming media.
IPTV is widely deployed in subscriber-based telecommunications networks with high-speed access channels into end-user premises via set-top boxes or other customer-premises equipment.
provides the required level of quality of service and experience, security, interactivity and reliability
IPTV services may be classified into three main groups:
Live television and live media, with or without related interactivity;
Time-shifted media: e.g. catch-up TV (replays a TV show that was broadcast hours or days ago), start-over TV (replays the current TV show from its beginning);
Video on demand (VOD): browse and view items in a stored media catalogue.
International Telecommunication Union focus group on IPTV (ITU-T FG IPTV)
[Wikipedia]

3. IPTV
Fig. [

4. IPTV
Middleware
Middleware is computer software that provides services to software applications beyond those available from the operating system. It can be described as "software glue".[1]
Middleware makes it easier for software developers to implement communication and input/output, so they can focus on the specific purpose of their application.

5. IPTV
Internet pages:
continue in next presentation file: IPTV_2.pdf

6. Video streaming
The verb "to stream" refers to the process of delivering or obtaining media in this manner; the term refers to the delivery method of the medium, rather than the medium itself, and is an alternative to file downloading, a process in which the end-user obtains the entire file for the content before watching or listening to it.
Streaming video is content sent in compressed form over the Internet and displayed by the viewer in real time. With streaming video or streaming media, a Web user does not have to wait to download a file to play it. Instead, the media is sent in a continuous stream of data and is played as it arrives. The user needs a player, which is a special program that uncompresses and sends video data to the display and audio data to speakers. A player can be either an integral part of a browser or downloaded from the software maker's Web site.
Live streaming refers to Internet content delivered in real-time, as events happen, much as live television broadcasts its contents over the airwaves via a television signal. Live internet streaming requires a form of source media (e.g. a video camera, an audio interface, screen capture software), an encoder to digitize the content, a media publisher, and a content delivery network to distribute and deliver the content. Live streaming does not need to be recorded at the origination point, although it frequently is.
There are challenges with streaming content on the Internet. If the user does not have enough bandwidth in their Internet connection, they may experience stops in the content and some users may not be able to stream certain content due to not having compatible computer or software systems.

7. Video streaming
Some popular streaming services are the video sharing website YouTube, which contains user-uploaded videos on a huge range of topics; Twitch and Mixer, which live stream the playing of video games; Netflix, which streams movies and TV shows; and Spotify and Apple Music, which stream music. Wowza Media Systems (
SK – provider: / , livestream.Sk(
[Wikipedia], [
[J. Ozer: Producing Streaming Video for Multiple Screen Delivery. Doceo Publishing. 412 West Stuart Drive, Galax, VA ]

8. Video streaming Protocols for video streaming:
The Real Time Streaming Protocol (RTSP) is a network control protocol designed for use in entertainment and communications systems to control streaming media servers. The protocol is used for establishing and controlling media sessions between end points. Clients of media servers issue VCR-style commands, such as play, record and pause, to facilitate real-time control of the media streaming from the server to a client (Video On Demand) or from a client to the server (Voice Recording).
The transmission of streaming data itself is not a task of RTSP. Most RTSP servers use the Real-time Transport Protocol (RTP) in conjunction with Real-time Control Protocol (RTCP) for media stream delivery. However, some vendors implement proprietary transport protocols. The RTSP server software from RealNetworks, for example, also used RealNetworks' proprietary Real Data Transport (RDT).