Patent ID: 7376127
Filing Date: 2008-05-20
Classification: H04M

Abstract:
1. A process for error correction in a packetized TTY stream, comprising: receiving a first plurality of packets, each comprising audio information corresponding to at least a portion of one or more TTY tones in at least one sequence of TTY tones; ordering the packets based on sequence numbers in the packets; depacketizing the at least a portion of one or more TTY tones in the ordered first plurality of packets to yield an ordered at least one sequence of TTY tones; determining when at least a portion of a TTY tone is missing from the ordered at least one sequence of TTY tones, wherein a gap in the ordered at least one sequence of TTY tones is assumed to represent a missing at least a portion of a TTY tone; when at least a portion of a TTY tone is missing, reconstructing the missing at least a portion of a TTY tone to form a reconstructed at least one sequence of TTY tones; thereafter repacketizing the reconstructed at least one sequence of TTY tones to form a second plurality of packets; and transmitting the second plurality of packets to a next node.