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IPTV AND HYBRID IPTV

IPTV AND HYBRID IPTV

IPTV

  • Internet Protocol television (IPTV) is a system through which television services are delivered using the Internet protocol suite over a packet-switched network such as the Internet (instead of being delivered through traditional terrestrial, satellite signal, and cable television formats) to provide the required level of quality of service and experience, security, interactivity and reliability.
  • IPTV services may be classified into three main groups:
  • live television, with or without interactivity related to the current TV show;
  • time-shifted television: 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 a catalog of videos, not related to TV programming.
  • IPTV is distinguished from Internet television by its on-going standardization process (e.g., European Telecommunications Standards Institute) and preferential deployment scenarios in subscriber-based telecommunications networks with high­ speed access channels into end-user premises via set-top boxes or other customer-premises equipment.

HYBRID IPTV

  • Hybrid IPTV refers to the combination of traditional broadcast TV services and video delivered over either managed IP networks or the public Internet. It is an increasing trend in both the consumer and pay TV (operator) markets.
  • Hybrid IPTV has grown in popularity in recent years as a result of two major drivers. Since the emergence of online video aggregation sites, like YouTube and Vimeo in the mid-2000s, traditional pay TV operators have come under increasing pressure to provide their subscribers with a means of viewing Internet-based video (both professional and user-generated) on their televisions.
  • At the same time, specialist IP-based operators (often telecommunications providers) have looked for ways to offer analogue and digital terrestrial services to their operations, without adding either additional cost or complexity to their transmission operations. Bandwidth is a valuable asset for operators, so many have looked for alternative ways to deliver these new services without investing in additional network infrastructures.
  • These trends led to the development of hybrid IPTV set-top boxes that included both a traditional broadcast tuner and an Internet connection — usually an Ethernet port.
  • A hybrid set-top allows content from a range of sources, including terrestrial broadcast, satellite, and cable, to be brought together with video delivered over the Internet via an Ethernet connection on the device. This enables television viewers to access a greater variety of content on their TV sets, without the need for a separate box for each service.
  • It also enable users to access a range of advanced interactive services, such as VOD and catch-up TV, as well as Internet applications, including video telephony, surveillance, gaming, shopping, e-government accessed via a television set.
  • An alternative approach is the IPTV version of the Headend in the Sky cable TV solution. Here, multiple TV channels are distributed via satellite to the ISP or IPTV provider’s point of presence (POP) for IP-encapsulated distribution to individual subscribers as required by each subscriber.
  • This can provide a huge selection of channels to subscribers without overburdening Internet trunking to the POP. IPTV AND HYBRID IPTV

ADVANTAGES OF IPTV | IPTV AND HYBRID IPTV

  • The Internet protocol-based platform offers significant advantages, including the ability to integrate television with other IP-based services like high speed Internet access and VolP.
  • A switched IP network also allows for the delivery of significantly more content and functionality. In a typical TV or satellite network, using broadcast video technology, all the content constantly flows downstream to each customer, and the customer switches the content at the set-top box.
  • The customer can select from as many choices as the telecoms, cable or satellite company can stuff into the “pipe” flowing into the home. A switched IP network works differently. Content remains in the network, and only the content the customer selects is sent into the customer’s home.
  • IPTV technology is bringing video-on-demand (VoD) to television, which permits a customer to browse an online program or film catalog, to watch trailers and to then select a selected recording. The playout of the selected item starts nearly instantaneously on the customer’s TV or PC.
  • Another advantage of an IP-based network is the opportunity for integration and convergence. This opportunity is amplified when using IMS-based solutions.
  • Converged services imply interaction of existing services in a seamless manner to create new value added services. One example is on-screen Caller ID, getting Caller ID on a TV and the ability to handle it (send it to voice mail, etc.).
  • IP-based services will help to enable efforts to provide consumers anytime-anywhere access to content over their televisions, PCs and cell phones, and to integrate services and content to tie them together. Within businesses and institutions, IPTV eliminates the need to run a parallel infrastructure to deliver live and stored video services.

DISADVANTAGES OF IPTV | IPTV AND HYBRID IPTV

  • IPTV is sensitive to packet loss and delays if the streamed data is unreliable. IPTV has strict minimum speed requirements in order to facilitate the right number of frames per second to deliver moving pictures.
  • This means that the limited connection speed and bandwidth available for a large IPTV customer base can reduce the service quality delivered.
  • Streaming IPTV across wireless links within the home has proved troublesome; not due to bandwidth limitations as many assume, but due to issues with multipath and reflections of the RF signal carrying the IP data packets.
  • An IPTV stream is sensitive to packets arriving at the right time and in the right order. Improvements in wireless technology are now starting to provide equipment to solve the problem.
  • Due to the limitations of wireless, most IPTV service providers today use wired home networking technologies instead of wireless technologies like 802.11. IPTV AND HYBRID IPTV

SCIENCE AND TECHNOLOGY

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