Device for identifying packets of digital data and a receiver for digital television signals equipped with such a device

摘要

Circuitry for identifying digital data packets, each comprising a useful signal and a header signal containing data pertaining to the contents of the useful signal is provided. The circuitry includes a means (30) for extracting data from each header signal, which data is representative of a corresponding useful signal, a means for storing reference data in a memory, at addresses each corresponding to a packet type, and a means for comparing the data extracted from each header signal with said reference data stored in memory, and for the delivery, to a data processing unit (32,34), of an address signal indicating the nature of the corresponding packet. The data storage means and the comparison means preferably employ an associative memory (38) adapted to ensure the simultaneous comparison of the data extracted from each header signal with the reference data stored in memory.