Patent ID: 6298387
Filing Date: 2001-10-02
Classification: H04L

Abstract:
Apparatus for delineating a packet in a bitstream, comprising:A first in, first out buffer having a storage capacity equal to a length of said packet plus a number of bits in a synchronization pattern for said packet, said first in, first out buffer being arranged (i) to pass data of said bitstream from a tail end of the first in, first out buffer at which the data is input to a head end of the first in, first out buffer and (ii) so that a predetermined number of bits at the head end and at the tail end are suppliable as output substantially simultaneously;a first comparator, for comparing the output of the head end of said first in, first out buffer with the synchronization pattern when the buffer is full, and for signaling if there is a match between the output of the head end and the first the synchronization pattern;a second comparator, for comparing the output of the tail end of said first in, first out buffer with the synchronization pattern when the buffer is full, and for signaling if there is a match between the output of the tail end and the synchronization pattern; andmeans for indicating detection of a packet when both said first comparator and said second comparator indicate matches and said first in, first out buffer is filled with data of said bitstream that is between said predetermined number of bits at the head end and said predetermined number of bits at the tail end.