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
Block Diagram
Figure 1 shows the block diagram for the Reed-Solomon decoder megafunction.
| Figure 1. Block Diagram |
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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.
Device Utilization Example
Table 1 lists the typical device utilization results for the megafunction.
| Table 1. Typical Device Utilization for the Megafunction |
| Device |
Speed Grade |
Utilization |
Performance(fMAX) |
Parameter Setting |
| Logic Cells |
EABs (1) |
| EPF10K30A |
-1 |
1,605 |
6 |
320 Mbps |
N = 204, K = 188,
8-bit symbols |
Note:
- EABs = Embedded array blocks
Contact Information
For additional information, you can contact Amphion Semiconductor, Ltd. at:
Amphion Semiconductor, Ltd.
51 Malone Road
Belfast, BT9 6RY
Northern Ireland
Tel. +44 28 9050-4000
Fax +44 28 9050-4001
Email: info@amphion.com
URL: http://www.amphion.com
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