| US 7,379,864 B2 | ||
| Method and apparatus for the detection of previous packet loss in non-packetized speech | ||
| Minkyu Lee, Ringoes, N.J. (US); and James William McGowan, Whitehouse Station, N.J. (US) | ||
| Assigned to Lucent Technologies Inc., Murray Hill, N.J. (US) | ||
| Filed on May 06, 2003, as Appl. No. 10/430,120. | ||
| Prior Publication US 2004/0225492 A1, Nov. 11, 2004 | ||
| Int. Cl. G10L 19/14 (2006.01) | ||
| U.S. Cl. 704—205 [707/206; 707/208; 455/226.1; 455/226.2; 455/226.3; 370/216; 370/242] | 18 Claims |
| 1. A method for identifying possible previous packet loss in previously packetized speech based on an analysis of un-packetized
speech, the un-packetized speech having been generated from said previously packetized speech, the method comprising the steps
of:
applying one or more filters to a segment of said un-packetized speech, each of said one or more filters determining an energy
parameter value for a given frequency band of said segment of said un-packetized speech;
comparing one or more of said determined energy parameter values to one or more corresponding thresholds; and
identifying said possible previous packet loss based on said comparison of said one or more of said determined energy parameter
values to said one or more of said corresponding thresholds,
wherein said one or more filters comprises at least a first filter which determines a first energy parameter value in a first
frequency band comprising frequencies less than a first predetermined frequency and a second filter which determines a second
energy parameter value in a second frequency band comprising frequencies greater than a second predetermined frequency, and
wherein said first and second energy parameter values are compared to first and second thresholds, respectively.
|