Reed-Solomon Decoder

"Features
Configurable solution for high data rate Reed-Solomon decoding
Supports a range of standards, including European Telecommunication Standards (ETS) 300-421 and ETS 300-429
Single implementation supports any valid block length
Processes both burst and continuous data
Supports high-speed applications (up to 400 Mbps)
Symbol wide input and output, clock by single symbol rate clock (higher rate clock, if available, can be used to reduce gate count)
Simple function interface allows easy integration into larger systems

Description
The Amphion Reed-Solomon decoder megafunction provides compact, high-performance solutions for a wide range of applications, and is consistent with the requirements of the European digital video broadcast (DVB) standards.

The European DVB standards provide system requirements for the broadcast of MPEG2 transport packets via, for example, cable or satellite channels. Reed-Solomon error correction coding techniques are employed on the 188-byte MTS packets, with the capability to correct eight errors per transport packet being required. This process requires 16 parity symbols per MTS packet resulting in a shortened Reed-Solomon codeword of N = 204, K = 188 (N is the number of symbols per codeword, K is the number of information symbols).

Amphion has developed a range of Reed-Solomon decoder megafunctions, capable of operation up to 100 Mbps in Altera complex programmable logic devices (CPLDs). This Reed-Solomon decoder megafunction is designed specifically for the requirements of DVB standards.

The megafunction assumes only the availability of a symbol rate clock and all operations in the decoder are timed with this clock. If a higher rate clock, for example a bit rate clock, is available, the clock can be used to reduce the gate count of the decoder."