Overview
The Helion DVB-LSA cores implement the DVB Local Scrambling Algorithm (LSA) which has been specified
by the DVB Steering Board to provide MPEG-2 Transport Stream security within the DVB Content Protection
and Copy Management (DVB-CPCM) system. DVB-CPCM has since been published as a ten-part formal standard
(TS 102 825) by ETSI.
The DVB Local Scrambling Algorithm provides the mechanism for the scrambling and descrambling of
MPEG-2 Transport Stream packets within compliant CPCM systems. It is based on the AES block cipher
described in FIPS 197 and provides a choice of two cipher block chaining modes, CBC and RCBC.
Helion DVB-LSA Solutions
The Helion DVB-LSA cores are provided as separate Scrambler and Descrambler cores in order to
provide the most efficient solutions whilst providing maximum flexibility to the user. They fully
support CBC and RCBC chaining modes, Ciphertext Stealing (CS), Short Block Handling, and
both MDI and MDD modes for processing "Must Stay Clear" (MSC) data.
Both cores are available in versions for use in Altera FPGA, Xilinx FPGA and ASIC. In common
with all Helion IP cores they have been designed with each technology firmly in mind to yield
the most efficient results. For more detailed information on these cores, please download
the appropriate datasheet below.
Measured Performance
| TARGET TECHNOLOGY |
SCRAMBLER MAX RATE |
SCRAMBLER AREA |
DESCRAMBLER MAX RATE |
DESCRAMBLER AREA |
Altera FPGA
(Cyclone II C6) |
334 Mbps |
1245 LEs
6 M4K RAMs |
270 Mbps |
1938 LEs
9 M4K RAMs |
Altera FPGA
(Cyclone III C6) |
408 Mbps |
1249 LEs
6 M9K RAMs |
348 Mbps |
1943 LEs
9 M9K RAMs |
Altera FPGA
(Stratix II C3) |
530 Mbps |
574 ALMs
3 M4K RAMs |
443 Mbps |
886 ALMs
6 M4K RAMs |
Xilinx FPGA
(Spartan 3 -5) |
348 Mbps |
593 slices
3 BlockRAMs |
227 Mbps |
920 slices
5 BlockRAMs |
Xilinx FPGA
(Virtex 4 -11) |
575 Mbps |
591 slices
3 BlockRAMs |
424 Mbps |
918 slices
5 BlockRAMs |
Xilinx FPGA
(Virtex 5 -3) |
701 Mbps |
308 slices
0 BlockRAMs |
483 Mbps |
455 slices
0 BlockRAMs |
Datasheets
Click here for the DVB-LSA cores Altera FPGA data sheet (PDF format)
Click here for the DVB-LSA cores Xilinx FPGA data sheet (PDF format)
Contact
For more detailed information on this or any of our other products and services,
please feel free to email us at
helioncores@heliontech.com and we will be pleased to discuss how we can assist
with your individual requirements.
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