Patent ID: 7178094
Filing Date: 2007-02-13
Classification: H03M

Abstract:
1. A method of transmitting signals comprising the steps of: receiving signals to be transmitted; source encoding said signals to build a variable length error code; channel encoding the variable length error code; and transmitting the channel encoded variable length error code, wherein said step of source encoding said signals to build the variable length error code comprises the sub-steps of: (1) initializing (phase (2) generating (phase (3) storing (phase (4) deleting (phase (5) in the case where no word is found or the maximum number of bits is reached, reducing (phase A (6) controlling that all words of the set W are distant of b (7) if the required number of codewords has not been reached, repeating the steps (1) to (6) until the method finds either no further possibility to continue or the required number of codewords; and (8) if the number of codewords of C is greater than S, calculating, on the basis of the structure of the VLEC code, the average length AL obtained by weighting each codeword length with the probability of the source, said AL becoming the AL said building method being such that the deletion is realized not only in the last obtained group but also in the group of a given length value in order to go back very quickly to smaller lengths.