Patent ID: 6603776
Filing Date: 2003-08-05
Classification: H04J

Abstract:
A data format conversion system for converting received network data between AUG/AU3/VC3 clear channel payloads and AU4/VC4/TU3/VC3 clear channel payloads, comprising:means for byte-disinterleaving said received network data into a plurality of distinct AU3 data streams; means for processing each of said plurality of distinct AU3 data streams using write data row counters and write data column counters, one set of counters for each of said data streams, to identify the stuff columns that are included in each of said plurality of distinct AU3 data streams; means for deleting said stuff columns in each of said plurality of distinct AU3 data streams; means for converting each VC-3 data stream to a pseudo VC-4/TU-3 format data stream by the addition of a dummy J1 byte column, DJ-1, plus an H-pointer column having H1, H2, and H3 bytes for each VC-3 data stream and interleaving three VC-3 data streams into a VC-4/TU-3 format, wherein H1 in said H-pointer column for each VC-3 data stream has a fixed value and is located from its corresponding J1 byte column in said VC-4/TU-3 format by a number of bits set by said fixed value; and means for discarding dummy bytes, interpreting said H1 and H2 pointers in said pointer columns in said pseudo VC-4/TU-3 format, generating new H1, H2, and H3 values and new values in said dummy J1 column and maintaining said payload intact to form a valid AU4/VC4/TU3/VC3 payload.