If you are going to introduce digital broadcasting in your cable net, but have not yet decided on the needed equipment, we offer several standard solutions, providing the following functionality:
Reception of the DVB-S/S2 digital satellite broadcasting of the Standard (SD) and High Definition (HD) in MPEG-2 / 4.
Choosing the desired TV programs out of the great number of the satellite transponders received, re-multiplexing and forming one’s own digital streams.
QAM modulated streams’ formation (QAM-A 64/128/256) in the DVB-C standard.
The use of DVB Simulcrypt compatible hardware to ensure a further development of the network.
Local and remote controle of all components of the headend.
1. Economy Class Solution with the PBI equipment
The Solution advantages:
- Low-cost start-up and low-cost increasing the number of broadcasted packets.
- Low cost of securing reserve. .
- User-friendly interface to control the equipment.
- The ability to use other SimulSrypt compliant conditional access systems simultaneously. .
The Solution disadvantages:
- Reduced reliability of the receiving path, due to the receivers’ sequential setting. It is desirablethat the staff would be at head-end constantly.
- Automatic reservation is impossible. .
Attention should be paid to the following:
- When selecting receivers, one needs to pay attention to the standard of the desired signal’s airing in order to order the receiver modification properly. For example, DVB-S or DVB-S2, etc. .
- Remultiplexers can only take one SPTS or MPTS over IP input. Thus, the presented circuit design is the most correct. The use of Ethernet switches for switching the streams from one package to another does not give the desired result.
2. A flexible Solution through the Harmonic equipment usage
The Solution advantages:
- All elements of the complex are connected to each other via IP. It is possible to use programs of a received package in different broadcasted packages.
- It is possible to connect the Operator’s satellite receivers or MPEG-encoders via ASI multiplexers’ input. Each multiplexer has two of these inputs. .
- Low price for a large number of broadcasted packages. .
- It is possible to connect the Operator’s satellite receivers or MPEG-encoders via ASI input of the PBI receivers. Each receiver has an ASI input and can transmit programs from the input to the IP output in the form of MPTS with the programs received from the satellite.
- Flexible forming of the output streams. The multiplexer allows multiplexing (and not remultiplexing, as in the previous solution) the streams, i.e. create new programs (services) out of any elementary streams available at the input (i.e., for example, taking the video of a program, and the sound of the other one).
- It is possible to provide an automatic backup by using the the Harmonic NMX control system.
- It is possible to use other Simulcrypt compliant conditional access systems simultaneously. .
The disadvantages of the Solution:
- High cost of initial investment, if the number of broadcasted packages is less than three.
- High cost of back up. .
Attention should be paid to:
- When selecting receivers, one needs to pay attention to the standard of the desired signal’s airing in order to order the receiver modification properly. For example, DVB-S or DVB-S2, etc.
Cable operator using DRECrypt CAS can broadcast “Platforma HD” high definition program package over his network simultaneously with his own programs and provide the subscriber with the possibility to receive them at the same STB. See the detailes in the Organization of digital broadcasting over a cable network together with the “Platforma HD” section.