Reed-Solomon Zero Detection for DMB Packet Error Parsing

The patent applies preliminary action by detecting all-zero symbols before performing standard R-S decoding. The zero detector checks each received symbol in advance, and when an all-zero symbol is detected, it is marked as an error symbol before the decoding process begins. This prevents the misinterpretation of all-zero symbols as error-free data that would otherwise cause parsing errors in the MPEG decoder.

The patent introduces an intermediary component called a zero detector that sits between the received symbol buffer and the R-S decoder. This zero detector acts as a mediator by identifying all-zero symbols and marking them with an error indicator before they reach the standard decoding pipeline. This allows the system to maintain normal decoding operations for valid symbols while correctly identifying problematic all-zero symbols that occur in blanket areas.

The patent applies segmentation by separating the error detection function into a distinct zero detector module independent from the main R-S decoding logic. The received symbols are processed through two parallel paths: one path checks for all-zero conditions using the zero detector, and another path performs standard R-S decoding. This segmentation allows the system to maintain simple standard decoding implementation while adding precise error detection capability for all-zero symbols without complicating the core decoding algorithm.