Video data processing device comprising a buffer memory

摘要

The processor includes a first circuit which reads data packets of a fixed length and stores them in a buffer memory. A second circuit reads the data packets from the buffer memory. A pointer in the buffer memory is reset to zero when the start of a data packet is detected. The pointer is formed from a comparator which compares a synchronisation word at the beginning of the packet with the data received. The pointer allows the writing of data to a particular area of the buffer memory. The second circuit is initialised when reading of the buffer memory does not commence for a predetermined time interval after writing of the data packet in the buffer memory.