MULTIPLEXING AN ADDITIONAL BIT STREAM WITH A PRIMARY BIT STREAM

摘要

Multiplexing an additional bit stream with a primary bit stream, where the primary bit stream is encoded into n xB/yB encoded bit stream, involves selecting yB code-words to convey the additional bit stream. Each xB word is represented by one yB code-word from a corresponding group of yB code-words, with each group of yB code-words including at least one yB code-word belonging to a category of code-words that tends to exhibit positive DC balance and at least one yB code-word belonging to a category that tends to exhibit negative DC balance. Bits of the additional bit stream are multiplexed with the primary bit stream by selecting code-words from one of the two categories to convey 1's and from the other category to convey 0's. Code-words that are not selected to convey bits of the additional bit stream are selected to balance the running disparity of the encoded bit stream.