http://contemporaryresearch.com/more-support/rf_iptv

Convergence starts with 4 letters Solutions AV, RF, and IP use HDMI TDMS streams at the start and use IP to distribute video TDMS is an uncompressed stream of packets, using R,G,B, Clock and EDID lines AV Switchers - convert to TDMS, IP switch to HDBaseT IP Switchers encoders use TDMS, encode as Motion JPEG, out via IP switch IPTV - convert to TDMS, encode to MPEG, send over LAN Digital RF - convert to TDMS, encode to MPEG, send over RF to JPEG 2000, use generic IP switch to decoders

AV/ IP Switching Shared values: 0 to low latency Lossless video, often up to 4K Dedicated UTP/Fiber wiring Proprietary system Limited to 300 via wire AV switching uses an internal IP switch, distributing control and media via HDBaseT IP Motion JPEG switching links encoders and decoders via a Layer 3 IP switch

Encoding - IP and RF MPEG is called inter-frame encoding, as it references other frames to operate The stream consists of several Group Of Pictures called the GOP Actually in each group there is only one picture the first frame. The other frames describe what has changed The decoder has to snag the first frame, plus a few more to start decoding back to video Typical latency for RF is 500 ms to 1500 ms end to end, IP delivery takes longer

Encoding - IP and RF MPEG2 is the standard for off-air, compatible with IP as well MPEG4 streams are half that of MPEG2, in use by Satellite,Cable TV and Ethernet, H.264 is an advanced version of MPEG4 HEVC H.265 is the current standard for 4K video HEVC is not fully efficient as yet, wants to charge for streaming, but it s the current standard The new AOMedia AV1 standard is far better and free, but not till 2019 Very long latency for encoding and decoding

RF is simple, as it operates using national standards for encoding and decoding TVs already have tuners (decoders) RF is essentially passive, driven by one or a few amplifiers RF is versatile and can mix coax, fiber, and Cat5 wiring RF is a long-distance carrier, operating far beyond the 300 limit RF just works 24/7 with no maintenance or support RF Distribution

IPTV Distribution It s complicated The network must support IPTV streaming The network must support the streaming bandwidth There are three types of IPTV systems: Open Standard IPTV Proprietary IPTV IP-based AV Switchers

RF/ IP Origination

IP - Unicast udp://@:1235

IP - Multicast udp://@:1235

Enable multicast (broadcast to all ports) Enable IGMP (limits streams) Player (Host) requests a stream using multicast URL (ex: 239.27.0.27) The Quierier is always asking if anyone wants to see a stream The PC s switch has been snooping the IGMP traffic and says Yes The router or encoder sends the stream to the switch, making copies if other hosts have made a request A Leave message from the host stops the stream to that port and switch IP - Multicast

Brightsign Excellent decoding UDP control Complex to program Amino H140 Fair decoding Simple playlist editing IR control only Open-Standard IPTV Decoders

RF Facility-Wide Integration Display Express software now controls TVs over RF Display Control Center creates RF control channel and hosts DX Lite software Display Express app on PC offers extensive control features ICC1-series TV Controllers manage TVs through RF

Sports stadiums are moving back to RF:.5 second latency vs 8 seconds Far less cost and maintenance Fan experience is the same Commercial sites are streaming over RF and IP Many other ways converge Convergence is a 2-way Street

You don t have to rely on expensive cable or satellite programming Hulu, Sling TV and others can deliver live-stream content Units like our QMOD Encoder- Modulators can ingest content from ROKU boxes as cable or 8VSB With 8VSB, you can mix in-house content and signage with free off-air channels Convergence is a 2-way Street

When planning for RF, there are several questions Can we use our existing RF coax? RF Integration Do we plan new coax for everywhere or specific locations? Do the planned TVs have built-in tuners? Do we need tuners for projectors and monitors? Do the TVs have RS-232 or only IR control? How are we creating channels from cable/satellite? What kind of in-house channels do we want to include?

IP Integration When planning for IPTV, there are several questions What streams can be decoded? How is the playlist populated? How integration-friendly is the unit? How are streams selected? IR, RS- 232, IP, Web page Can the player control the display? Is there a method for facilitywide management? Can the receiver be a part of an integrated system? Are you forced to use one make of encoder/decoder? Will this operate in my site network, or do we need a dedicated network for video?

http://contemporaryresearch.com/more-support/rf_iptv