Sunil K Gupta

US Patent:

7219059, May 15, 2007

Filed:

Jul 3, 2002

Appl. No.:

10/188539

Inventors:

Sunil K. Gupta - Edison NJ, US
Ziyi Lu - Shanghai, CN
Fengguang Zhao - Shanghai, CN

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G10L 15/08

US Classification:

704240, 704238, 704239

Abstract:

A method and apparatus for generating a pronunciation score by receiving a user phrase intended to conform to a reference phrase and processing the user phrase in accordance with at least one of an articulation-scoring engine, a duration scoring engine and an intonation-scoring engine to derive thereby the pronunciation score.

US Patent:

7266127, Sep 4, 2007

Filed:

Feb 8, 2002

Appl. No.:

10/068023

Inventors:

Sunil K. Gupta - Edison NJ, US
Chetan Vinchhi - Marlboro NJ, US

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04L 12/56

US Classification:

370413, 704503

Abstract:

The system includes a jitter buffer for receiving speech packets in a Voice over Internet Protocol (VoIP) system, a playback device for adjusting the playback speed of the received speed packets, and a jitter buffer manager for detecting out of sequence packets in the jitter buffer and for sending commands to the playback device to adjust playback speed based on the detection. The speech signal is played back at the nominal speed when there are no out of sequence packets. The playback speed is decreased when an out of sequence packet is detected, thereby tending to increase the jitter buffer length. When an out of sequence packet arrives, the playback speed is increased in order to restore jitter buffer length to its nominal length.

US Patent:

7299188, Nov 20, 2007

Filed:

Feb 10, 2003

Appl. No.:

10/361256

Inventors:

Sunil K. Gupta - Edison NJ, US
ZiYi Lu - Shanghai, CN
Prabhu Raghavan - Edison NJ, US
Zulfiquar Sayeed - Hightstown NJ, US
Aravind Sethuraman - Piscataway NJ, US
Chetan Vinchhi - Marlboro NJ, US

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G10L 11/00
G10L 21/06

US Classification:

704276, 704 1

Abstract:

A method and apparatus for generating a pronunciation score by receiving a user phrase intended to conform to a reference phrase and processing the user phrase in accordance with at least one of an articulation-scoring engine, a duration scoring engine and an intonation-scoring engine to derive thereby the pronunciation score. The scores provided by the various scoring engines are adapted to provide a visual and/or numerical feedback that provides information pertaining to correctness or incorrectness in one or more speech-features such as intonation, articulation, voicing, phoneme error and relative word duration. Such useful interactive feedback will allow a user to quickly identify the problem area and take remedial action in reciting “tutor” sentences or phrases.

US Patent:

7302389, Nov 27, 2007

Filed:

Aug 8, 2003

Appl. No.:

10/637235

Inventors:

Sunil K. Gupta - Edison NJ, US
Prabhu Raghavan - Edison NJ, US
Chetan Vinchhi - Marlboro NJ, US

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G10L 15/26

US Classification:

704235, 704257, 704243, 704250

Abstract:

A computer-based system generates alternative phonetic transcriptions for a target word or phrase corresponding to specific phonological processes that replace individual phonemes or clusters of two or more phonemes with replacement phonemes. The system compares a user's speech with a list of possible transcriptions that includes the base (i. e. , correct) transcription of the test target as well as the different alternative transcriptions, to identify the transcription that best matches the user's. In a speech therapy application, the system identifies the phonological process(es), if any, associated with the user's speech and generates statistics over multiple test targets that can be used to diagnose the user's specific phonological disorders. The system can also be implemented in other contexts such as foreign language instruction and automated attendant applications to cover a wide variety and range of accents and/or phonological disorders.

US Patent:

7664267, Feb 16, 2010

Filed:

Jun 30, 2005

Appl. No.:

11/170900

Inventors:

Chenggang Duan - Shanghai, CN
Fengguang Zhao - Shanghai, CN
Sunil K. Gupta - Edison NJ, US

Assignee:

Agere Systems Inc. - Allentown PA

International Classification:

H04L 9/00
H04K 1/00
H03M 7/00
H04L 9/06

US Classification:

380269, 360 28, 708203, 341107

Abstract:

An encryption device and method and decryption device and method which implement a bit-based encryption scheme and hardware design. The encryption device includes a random number generator, receiving a main key, determining a working key using at least one random number and outputting a working key, a model, receiving the main key, the working key and plain text to be encoded and generating at least two frequency counts. The encryption device further includes an encoder, which outputs encoded text based on the working key, the plain text and the at least two frequency counts. The encryption device and method and decryption device and method process encrypted text that is based upon a stream structure with an unlimited key length and may be compressed by %. The encoded text is changeable with different environments even for the same plain text and the same key. Operations of the hardware design are based on arithmetic additions and shifts, and not multiplications and divisions.

US Patent:

20020094080, Jul 18, 2002

Filed:

Nov 30, 2000

Appl. No.:

09/725910

Inventors:

Chenggang Duan - Shanghai, CN
Fengguang Zhao - Shanghai, CN
Sunil Gupta - Edison NJ, US

International Classification:

H04K001/00
H04L009/00

US Classification:

380/028000

Abstract:

An encryption device and method and decryption device and method which implement a bit-based encryption scheme and hardware design. The encryption device includes a random number generator, receiving a main key, determining a working key using at least one random number and outputting a working key, a model, receiving the main key, the working key and plain text to be encoded and generating at least two frequency counts. The encryption device further includes an encoder, which outputs encoded text based on the working key, the plain text and the at least two frequency counts. The encryption device and method and decryption device and method progress encrypted text that is based upon a stream structure with an unlimited key length and may be compressed by 50%. The encoded text is changeable with different environments even for the same plain text and the same key. Operations of the hardware design are based on arithmetic additions and shifts, and not multiplications and divisions. As a result, the hardware design is simple and applicable to cryptography and e-commerce.

US Patent:

20030120493, Jun 26, 2003

Filed:

Dec 21, 2001

Appl. No.:

10/027580

Inventors:

Sunil Gupta - Edison NJ, US

International Classification:

G10L021/00
G10L011/00

US Classification:

704/270100

Abstract:

The system includes a client device in communication with a server. The client device receives an input speech utterance in a voice dialog via an input device from a user of the system. The client device includes a speech recognition engine that compares the received input speech to stored recognition vocabulary representing a currently active vocabulary. The speech recognition engine recognizes the received utterance, and an application dynamically updates the recognition vocabulary. The dynamic update of the active vocabulary can also be initiated from the server, depending upon the client application being run at the client device. The server generates a result that is sent to the client device via a suitable communication path. The client application also provides the ability to customize voice-activated commands in the recognition vocabulary related to common client device functions, by using a speaker-training feature of the speech recognition engine.

US Patent:

20040230431, Nov 18, 2004

Filed:

May 14, 2003

Appl. No.:

10/438142

Inventors:

Sunil Gupta - Edison NJ, US
Prabhu Raghavan - Edison NJ, US
Chetan Vinchhi - Marlboro NJ, US

International Classification:

G10L015/04

US Classification:

704/254000

Abstract:

A computer-based system generates alternative pronunciations for a test word or phrase corresponding to specific phonological processes that replace individual phonemes or clusters of two or more phonemes with replacement phonemes. The system compares a user's pronunciation with a list of possible pronunciations that includes the base (i.e., correct) pronunciation of the test target as well as the different alternative pronunciations to identify the pronunciation that best matches the user's. The system identifies the phonological process(es), if any, associated with the user's pronunciation and generates statistics over multiple test targets that can be used to diagnose, in a speech therapy context, the user's specific phonological disorders.