Sunil R 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:

7373294, May 13, 2008

Filed:

May 15, 2003

Appl. No.:

10/438642

Inventors:

Juergen Cezanne - Tinton Falls NJ, US
Sunil K. Gupta - Edison NJ, US
Chetan Vinchhi - Marlboro NJ, US

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G10L 11/04
G10L 21/00

US Classification:

704207, 704211

Abstract:

The intonation of speech is modified by an appropriate combination of resampling and time-domain harmonic scaling. Resampling increases (upsampling) or decreases (downsampling) the number of data points in a signal. Harmonic scaling adds or removes pitch cycles to or from a signal. The pitch of a speech signal can be increased by combining downsampling with harmonic scaling that adds an appropriate number of pitch cycles. Alternatively, pitch can be decreased by combining upsampling with harmonic scaling that removes an appropriate number of pitch cycles. The present invention can be implemented in an automated speech-therapy tool that is able to modify the intonation of prerecorded reference speech signals for playback to a user to emphasize the correct pronunciation by increasing the pitch of selected portions of words or phrases that the user had previously mispronounced.

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:

20030023439, Jan 30, 2003

Filed:

May 2, 2001

Appl. No.:

09/846200

Inventors:

Gregory Ciurpita - Somerset NJ, US
Sunil Gupta - Edison NJ, US
Prabhu Ragavan - Edison NJ, US

International Classification:

G10L015/00
G10L017/00

US Classification:

704/246000

Abstract:

A method and system of recognizing speech based in part on an observation that a speaker naturally pauses and speaks smaller subgroups of speech units or digits that form part of a complete longer speech sequence. In the method, subgroups of speech units are processed by the system between a human's natural pauses. This pause is detected by the system and the subgroup is processed in order to provide a recognition result, which is a best representation of the input subgroup. The recognition result is immediately repeated back to the user for verification. The user is prompted to repeat a subgroup for re-recognition and re-verification if a rejection criteria is met; otherwise the processing steps are repeated for remaining subgroups until it has been determined that the complete speech sequence has been accurately recognized.