Minkyu Lee, 613 Whitehouse Way, Ringoes, NJ 08551

7379864, May 27, 2008

May 6, 2003

10/430120

Minkyu Lee - Ringoes NJ, US
James William McGowan - Whitehouse Station NJ, US

Lucent Technologies Inc. - Murray Hill NJ

G10L 19/14

704205, 707206, 707208, 4552261, 4552262, 4552263, 370216, 370242

A method and apparatus for detecting previous packet loss in non-packetized speech by applying one or more filters to a segment of said non-packetized speech, each of said one or more filters determining an energy parameter value for a given frequency band of said segment of said non-packetized speech; comparing one or more of said determined energy parameter values to one or more corresponding thresholds; and detecting 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.

7391737, Jun 24, 2008

Sep 29, 2004

10/953907

Minkyu Lee - Ringoes NJ, US
James William McGowan - Whitehouse Station NJ, US

Lucent Technologies Inc. - Murray Hill NJ

G01R 31/08

370252, 370352

A method and apparatus for measuring Quality-of-Service (QoS) in packet-based communications networks for Voice-over-IP applications is advantageously based not only on packet loss information but also on particular characteristics of the speech data itself. Measurement of failures of the “quasi-stationary” (QS) property of speech—that is, the assumption that both the pitch and spectral envelop usually vary slowly relative to the packet size—are advantageously used in conjunction with measures of packet loss characteristics (e. g. , packet loss rates or burst ratios) to calculate a QoS measure. One specific QS failure measure—referred to herein as QSFE (quasi-stationary failure estimate)—advantageously estimates the phoneme rate and is used in one illustrative method for calculating a QoS measure for Voice-over-IP applications in the presence of packet loss.

7411985, Aug 12, 2008

Mar 21, 2003

10/394118

Minkyu Lee - Ringoes NJ, US
James William McGowan - Whitehouse Station NJ, US

Lucent Technologies Inc. - Murray Hill NJ

H04L 12/26

370912, 370465, 370352, 370230, 704207, 704218, 704214

A low complexity packet loss concealment method for use in voice-over-IP speech transmission calculates a cross-correlation of previous speech data to estimate the pitch period of the previous speech when speech frames have been lost. A tap interval used to calculate the cross-correlation is dynamically adapted, thereby reducing the computational complexity of the process. In addition, the pitch period estimation is bypassed completely when it is determined not to be necessary, as a result of the speech being unvoiced or silence. A waveform “bending” operation is performed into the current frame without inserting any algorithmic delay into each frame.

7436822, Oct 14, 2008

Jun 9, 2003

10/457104

Minkyu Lee - Ringoes NJ, US
James William McGowan - Whitehouse Station NJ, US

Lucent Technologies Inc. - Murray Hill NJ

H04L 12/66

370356

A method and apparatus for estimating transmission delay across a telecommunications network by performing a statistical analysis of conversational, behavior in the network. Certain characteristic events associated with conversational behavior (such as, for example, alternative silence events, double-talk events, talk-spurt events and pause in isolation events) are identified and measured. Then, based on the proportion of time that these events occur, an estimate of the delay is calculated using a predetermined equation. Illustratively, the equation is a linear regression equation which has been determined experimentally.

7466692, Dec 16, 2008

Sep 9, 2004

10/936990

Minkyu Lee - Ringoes NJ, US
James William McGowan - Whitehouse Station NJ, US

Alcatel-Lucent USA Inc. - Murray Hill NJ

H04L 12/66

370352, 370229, 370230, 370231, 370232, 370353, 370354, 370355, 370356, 370394

A method and apparatus for performing Quality-of-Service (QoS) calculations on packet-based communications networks using a QoS measure which is based on data included in non-lost packets, as well as on data included in lost packets, when the proper interpretation of the data in non-lost packets depends upon data in one of the lost packets. Two new QoS measures that address the limitations inherent in the prior art PLR (Packet Loss Rate) measure are introduced. The Packet Loss Distortion Rate (PLDR) measure determines both packets which are lost, as well as packets whose proper interpretation depends on one or more packets which have been lost. The Media Distortion Rate (MDR) measures the actual quantity of media material that is lost, regardless of how the material is grouped into individual packets.

7633947, Dec 15, 2009

Nov 29, 2005

11/288743

Minkyu Lee - Ringoes NJ, US
James William McGowan - Whitehouse Station NJ, US

Alcatel-Lucent USA Inc. - Murray Hill NJ

H04L 12/56

37039542

A method and apparatus for bundling packets together for transmission in a Voice over IP communications network based on packet location within a talk spurt. Illustratively, all frames other than the first and last frames of a talk spurt may be advantageously bundled up to a predetermined maximum bundle size. This results from the recognition that the first and last packets of the talk spurt are the packets that will most directly affect the conversational delay. Therefore, other packets can be advantageously considered to be “non-critical” (with respect to conversational delay), and thus, may be bundled together with one or more other packets. In this manner, bandwidth may be advantageously reduced without negatively impacting the perceived conversational delay.

7701886, Apr 20, 2010

May 28, 2004

10/856728

Minkyu Lee - Ringoes NJ, US
Qiru Zhou - Scotch Plains NJ, US
Imed Zitouni - White Plains NY, US

Alcatel-Lucent USA Inc. - Murray Hill NJ

H04Q 11/00

370270, 370342

A method for performing packet loss concealment of lost packets in Voice over IP (Internet Protocol) speech transmission. Statistical n-gram models are initially created with use of a training speech corpus, and then, packets lost during transmission are advantageously replaced based on these models. In particular, the existence of statistical patterns in successive voice over IP (VoIP) packets is advantageously exploited by first using conventional vector quantization (VQ) techniques to quantize the parameter data for each packet with use of a corresponding VQ index, and then determining statistical correlations between consecutive sequences of such VQ indices representative of the corresponding sequences of n packets. The statistic n-gram predictive models so created are then used to predict parameter data for use in representing lost data packets.

7783482, Aug 24, 2010

Sep 24, 2004

10/948933

Thomas John Janiszewski - Andover NJ, US
Minkyu Lee - Ringoes NJ, US
James William McGowan - Whitehouse Station NJ, US
Michael Charles Recchione - Nutley NJ, US

Alcatel-Lucent USA Inc. - Murray Hill NJ

G10L 21/02

704228

A method and apparatus for enhancing voice intelligibility for network communications of speech such as, for example, VoIP (Voice-Over-Internet-Protocol), in the presence of packets which arrive too late for normal playout. When a late speech packet is received by a speech decoder, that packet and, if necessary, one or more additional packets subsequent thereto, are played out over a shorter than normal duration so that the decoder can “catch up” with the encoder. Since a voice frame is usually decoded in several sub-frames—typically two or three—this shortened playout may be achieved, for example, by skipping one sub-frame from each frame to be shortened.