Talk:Randomizer

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Randomizers vs Interleavers[edit]

In telecommunications, both Randomizers and Interleavers are used. Interleaving is used in digital data transmission technology to protect the transmission against burst errors. These errors overwrite a lot of bits in a row, so a typical error correction scheme that expects errors to be more uniformly distributed can be overwhelmed. Interleaving is used to help stop this from happening.

However, Interleavers are not Randomizers.

Interleavers do not alter data, that is to say the data retains the same original number of 1's and 0's it had before it entered the interleaver.
Randomizers suppress excess DC components in data, an Interleaver can not do this.
Sometimes, in order to achive optimal signal to noise ratios using an interleaver and a randomizer is necessary.
The CCSDS Space Communications Protocols recommend using both an interleaver and a randomizer to protect the integrity of the downlink.
Interleavers create measurable and predictable time delays in the processing of data but randomizers also create delays but generally of a magnitude less than interleavers.

This needs to be added to make the article more readable. Eyreland (talk) 12:02, 12 February 2010 (UTC)[reply]