Desynchronizer and use of same

Details Desynchronizer and use of same Desynchronizer and use of same

H - Electricity

04

L

H04L 12/54 (2006.01) H04J 3/24 (2006.01) H04L 12/56 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2110341

- 21 - Desynchronizer and use of same The desynchronizer stores information units corresponding to time slots of a PCM-stream (IN) in consecutive memory locations of a buffer memory (BM). The number of memory locations of this memory (BM) corresponds to the length of a subframe within which the desynchronizer substantially randomizes the order of the information units. This randomization is achieved by reading the stored information units in an order dictated by a permutation (A1) of the addresses of the memory locations. This permutation (A1) is substantially randomly selected from the limited number of possible permutations by a permutation means (PM) and is started simultaneously with the arrival of the first information unit of a subframe. In order to ensure that all information units axe forwarded to the output stream (OUT) the mentioned permutation is repeated (A2) by a permutation repetition means (PRM) simultaneously with a new permutation (A1) corresponding to a next subframe.

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