×

Error correction for DTMF corruption on uplink

  • US 8,423,102 B2
  • Filed: 06/12/2012
  • Issued: 04/16/2013
  • Est. Priority Date: 01/25/2010
  • Status: Active Grant
First Claim
Patent Images

1. A method of receiving commands during a call over a channel, the commands based on tone description data for at least one feature code, each at least one feature code defined by a start delimiter tone, a stop delimiter tone, and a pre-determined number of at least two informational tones, the method comprising:

  • receiving a signal over the channel;

    identifying, in the received signal, a delimiter tone and at least one informational tone, but fewer than the pre-determined number of informational tones, when one or more of the at least two informational tones is not detected in the received signal; and

    determining a feature code based on the identified delimiter tone and the identified at least one informational tone.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×