Digital Video Broadcasting (DVB)

DVB is a set of standards that define digital broadcasting using existing satellite, cable, and terrestrial infrastructures.
The term digital television is sometimes used as a synonym for DVB

1. In this presentation Broadcasting DVB DVB-Standards Frequency bands Block Diagram of Digital Network Introduction to DVB-S, C, T Different Devices used in Digital Network

2. Broadcasting: In Telecommunication, broadcasting  refers to a method of transferring a message to all recipients simultaneously

3. Digital Video Broadcasting (DVB) DVB is a set of standards that define digital broadcasting using existing satellite, cable, and terrestrial infrastructures. The term  digital television  is sometimes used as a synonym for DVB

4. DVB Standards DVB-S DVB-C DVB-T DVB-S2 DVB-C2 DVB-T2

5. Satellite Frequency Bands C-Band(4 to 8GHz) K U -Band(11 to 17GHz) K A -Band(20 t0 30GHz)

6. Receiver MUX Combiner Optical TX Free To Air Digital Channel Block ROSA SYSTEM QAM

7. Receiver MUX QAM Combiner Optical TX Descrambler Paid Channel Digital Block Diagram ROSA SYSTEM

8. Receiver Multiplexer QAM IF Modulator Audio Video IF out Up Converter ASI OUT ASI OUT ASI =Asynchronous Serial Interface Rf Combiner 1550nm optical TX More than one Channels with single receiver on Digital network Dish Single channel with single receiver on analog network RF RF RF To co-locations QAM=Quadrature amplitude modulation

9. DVB-S DVB-S is an abbreviation for "Digital Video Broadcasting — Satellite“. It is the original Digital Video Broadcasting Forward error correction and demodulation standard for Satellite Television. Dates from 1995, in its first release, while development lasted from 1993 to 1997 .

10. Frequency in Use by Nayatel Frequency range being used by Nayatel for receiving channels is 10.3GHz to 12.3GHz. Note: Communication spectrum for military can use upto 18GHz frequency.

11. DVB-S2 Digital Video Broadcasting - Satellite - Second Generation designed as a successor for the popular  DVB-S   system. Developed in 2003 Impact2 and Impact4 Encoding Schemes are used to lessen the Bandwidth The development of DVB-S2 coincided with the introduction of HDTV and  H.264  (MPEG-4 AVC) 

12. Difference Between DVB-S, DVB-S2  DVBS is basically SD (NOT HD) and DVBS2 is HD DVBS sends in MPEG2 (like what you find in DVD`s) and DVBS2 sends in MPEG4 which is a better compression algorithm DVB-S use QPSK as Modulation Mode while DVB-S2 uses QPSK, 8PSK, 16PSK modulation modes.

13. Improvements: In March 2014,  DVB-S2X  specification has been published by DVB Project

14. DVB-C( Digital Video Broadcasting – Cable)   DVB  European consortium standard for the broadcast transmission of  digital television  over  cable .  first published by the  ETSI  in 1994 DVB-C ( VHF / UHF ) uses  QAM : 16-QAM, 32-QAM, 64-QAM, 128-QAM or 256-QAM.  transmits an  MPEG-2  or  MPEG-4  family  digital audio / digital video  stream

15. DVB-C2 Development announced in 2008 The final DVB-C2 specification was approved by the DVB Steering Board in April 2009. DVB-C2 allows bitrates up to 83.1 Mbit/s on a 8 MHz channel bandwidth when using 4096-QAM modulation. Future extensions will allow up to 97 Mbit/s and 110.8 Mbit/s per channel using 16384-QAM and 65536-AQAM modulation Muliplets Multiple Streams into Single Transport Stream. Only Lies for UHF

16. Being Used in Nayatel Nayatel is using 64QAM with 8MHz gap, using which total of 38.2Mbps of data can be streamed.

17. DVB-C DVB-C2 Input   Interface Single  Transport Stream (TS) Multiple  Transport Stream  and  Generic Stream Encapsulation (GSE) Modes Constant Coding  & Modulation Variable Coding  & Modulation and  Adaptive Coding  & Modulation FEC Reed Solomon  (RS) LDPC  +  BCH  1/2, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10 [4] Modulation Single Carrier  QAM absolute  OFDM [5] Modulation Schemes 16- to 256- QAM 16- to 4096- QAM Guard Interval Not Applicable 1/64 or 1/128 Inverse  Fast Fourier transform  (IFFT) size Not Applicable 4k [6] Interleaving Bit-Interleaving Bit- Time- and Frequency-Interleaving Pilots Not Applicable Scattered and Continual Pilots

18. DVB-T DVB-T offers three different modulation schemes ( QPSK ,  16QAM ,  64QAM ) A terrestrial (over-the-air) transmission carries 19.39  megabits  of data per second

19. DVB-H Sub-standard of DVB-T, introduced for Hand Held devices like Mobile Was not successful.

20. Transmission made through DVB is not only Video, but Data as well It contains: Network Information Table(NIT) Transport Stream ID (TS-ID) Service Description Table (SDT)

21. The IRD is the interface between a receiving satellite dish and a broadcasting facility video/audio infrastructure. Integrated receiver decoder INPUT RF OUTPUT ASI/AV CAPABLE TO DESECRAMBLE PAID CHANNELS IRD

22. Advantages: DVB - High bandwidth outbound or broadcast - Designed and built for Video Broadcast - Lower Cost of Remote Terminals

23. Disadvantages: - Generally Power-Limited satellite requirement - Very inefficient when use of transponder capacity - Not designed for TCP/IP traffic. IP is encapsulated within MPEG - Very high Hub equipment cost

24. 1. Used for re-multiplexing of digital channels 2. 8 ASI Inputs, 2 ASI Outputs 3. Web Based Management/Server ROSA Management 4. Input stream has multiple channels and we select only which we need 5. We are using 4 Muxes 9600 Multiplexer 9600(SA)

25. 1. Output of Mux 9600 is given to QAM Modulator 2. Used for QAM (Quadrature Amplitude Modulation) at Digital Frequencies 3. We use 64 QAM (other types are 32, 128, 256) 4. ASI Input, RF Output 5. Limitation of Maximum 38.2 Mbps per QAM 6. One QAM, One Digital Frequency QAM Modulator (SA)

26. 1. Used to open complete stream of scrambled channels 2. ASI In, ASI Out 3. Web Based Management 4. Work with Sharing Card Descrambler (SA)

27. 1. Enhanced Multimedia Router (EMR) by Sumavision 2. Major Purpose is to add AV channels in Digital 3. 6 cards per chassis 4. 5 Analog MPEG2 AV Input cards, 2 AV inputs per card 5. 1 Output Card, 2 ASI In, 2 ASI Out 6. Total Inputs: 10 AV and 2 ASI 7. Total Outputs: 2 ASI 8. Management through Application ‘ Netmanager ’ 9. Other cards are ASI Combiners, HDMI Input, Satellite Tuner, IP Output EMR

28. 1. Multiplexer for Digital and IP TV 2. 16 ASI inputs 3. IP output 4. Supports Multicast, Unicast and all types of QAM streams 5. Management through application ‘Cherrypicker’ 6. Number of RF Muxes depends upon APEX QAM cards Mix DM6400

29. 1. QAM Modulator for Mux DM 6400 2. Coverts IP to RF 3. Total 3 Cards 4. Each card has 2 ports 5. Each port support 2 digital frequencies 6. 4 frequencies per card 7. 12 frequencies for APEX Apex 1000

30. MUX QAM Combiner Optical TX EMR A/V Free And Paid Digital Channel Block ROSA SYSTEM Receiver/Decoder

31. DM 6400 Apex Combiner Optical TX A/V Free And Paid Digital Channel Block MOTOROLA SYSTEM EMR Receiver/Decoder Ethernet Switch

32. 1. Used to share one Descrambling in multiple receivers and descramblers 2. Card is inserted in main device and sharing cards are connected with this main device 3. Other receivers/descramblers work with sharing cards Sharing Devices

33. 1. VOLT (Video Optical Line Terminal) by Scientific Atlanta 2. Used in distribution of Fiber Network 3. Chassis in Data Center converts RF network to Fiber (Optical Network) 4. Chassis in POPs used for distribution and amplification 5. One chassis has 15 Slots 6. First four slots are reserved for Power and last 15th slot is for management card 7. Rest of the slots are for Amplifiers Prism Chassis

34. Things we need to know first QAM:  stands for  quadrature amplitude modulation , the format by which digital cable channels are encoded and transmitted via  cable television   providers. An ASI signal can carry one or multiple  SD ,  HD  or audio programs that are already compressed. ( Asynchronous Serial Interface ).

35. Technology DVB standard for the forward or broadcast channel has the following technical characteristics, - MPEG frame for transporting video and data - RSV (Reed-Solomon Viterbi) based Forward Error Correction - Very high bandwidth on the outbound