Worldwide the television industry is currently in the process of changing from analog to digital technology. MPEG-2 has now been universally adopted as the main standard for video compression. Since MPEG-2 does not contain all required metadata, an information layer needs to be added to the MPEG in order to transmit it to some end users. Standards have been created by industry to provide for the methodology of packetizing MPEG-2 streams and adding encoding information in tables via data packets to the video packets. The DVB standard has been approved by the European Community and other industry and government groups as the standard to accommodate the need for satellite and terrestrial originated digital television. This product complies with the DVB ASI specifications as defined in ETSI TR 101 891 and provides for the ability of computers to capture, process, and transmit DVB ASI compliant streams.

THE DVB ASI STANDARD

DVB ASI defines a method of digitally transmitting MPEG-2 Transport Streams at 270 mbps and is designed to be transmitted via QPSK modulation via a Satellite based Router to the home receiver. It is usually composed of many standard definition 4-6 Mbps streams Multiplexed together with associated audio streams in various languages into a multi Program Transport Stream. This is the standard that is usually used to feed most brands of DVB Modulators. Our DVB Master III Tx device can be used to create outputs for Video Servers or test equipment that is compatible with the DVB ASI standard.

Clock Issues: The DVB ASI standard specifies a very accurate 30 ppm clock. The cabling for DVB requires a 75 Ohm Coaxial Cable with BNC connectors.

• 213 Mbps DVB-ASI transmitter on a single PCI card
• Low Jitter rate control with optional interbyte stuffing
• Software-controlled Transmit Clock selection:
  o On-board oscillator (27 MHz)
  o External clock input (27 MHz)
• Transmit Clock Output (via header)
• Automatic stuffing of null PID packets via firmware
• Drivers for Windows® 7 -- 32 and 64 bit, Server 2003, Server 2008, Windows® 2000, Windows® XP, and Linux®
• Windows® XP/Server 2003/Server 2008/Linux® API
• DirectShow® filter
• Includes mini application in C++ source
• Implemented with full 32 bit Scatter Gather DMA
• Interface for Layer-0 and Layer-1 of the DVB Serial Transmission Link (ASI) standard (A010 rev1 and EN 50083-9)
• Tested at over 100 Mbits throughput
• Puts less than 2% load on newer CPU's
• FCC and UL certified. CE testing underway
• Jitter Minimization in hardware
• Proven 3rd Generation Design in High Volume production since 1999
• 25 ppm crystal-controlled oscillator is standard
• Optional High Stability Oscillator (+/- 2.5 ppm)
• 5 or 3.3 Volt support for use with PCI 2.2 bus backplanes
• Transmitter Fine Tuning (FT)
• Fine Control PCR pacing
• Automatic Null Packet Insertion
• Reed-Solomon Conversion – The software can be set to have hardware add 16 bytes filled with zeros to 188-byte packets to create a 204-byte packet stream
• Tested compatible with major brands of Modulators and Muxes
• Room in large FPGA for your custom functions

• MPEG-2 Transport Stream Video Server/Generator
• MPEG-2 Transport Stream Repurposing
• SI Table Insertion for Private Data Broadcasting
• High Definition HDTV - Servers
• Electronic Program Guide Table Insertion
• IP over MPEG data encapsulation
  

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