Wanrong R Lin

US Patent:

6944226, Sep 13, 2005

Filed:

Oct 3, 2000

Appl. No.:

09/677901

Inventors:

Wanrong Lin - Plainsboro NJ, US
Dennis Bushmitch - Somerset NJ, US
David Alan Braun - Denville NJ, US
Raghuraman Mudumbai - Brooklyn NY, US
Yao Wang - Matawan NJ, US

Assignee:

Matsushita Electric Corporation of America - Secaucus NJ

International Classification:

H04N007/12

US Classification:

3752402, 348441, 386 40, 37524025

Abstract:

A method is provided for transcoding between video signals in two standards, DV and MPEG-2, each standard including discrete cosine transform (DCT) compressed signals. The each of the signals have macroblocks containing a plurality of DCT blocks. The DCT blocks are quantized according to respective quantization methods defined by the standards. The coefficients in each block are zigzag scanned, run-length coded and variable-length coded. The process variable-length decodes the coefficients and translates the quantized coefficients in the DV standard into quantized coefficients in the MPEG standard without fully dequantizing at least some of the DV coefficients and without performing an inverse DCT operation on any of the DCT coefficients. DV blocks that are encoded in a 248 format are translated into an 88 format before they are converted to MPEG-2 blocks. A method for transcoding from MPEG-2 to DV is also described.

US Patent:

7020823, Mar 28, 2006

Filed:

Mar 19, 2002

Appl. No.:

10/101073

Inventors:

Dennis Bushmitch - Somerset NJ, US
Wanrong Lin - Plainsboro NJ, US

Assignee:

Matsushita Electric Industrial Co., Ltd. - Osaka

International Classification:

H03M 13/00

US Classification:

714752

Abstract:

Error resilient methods and apparatus for coding, transmitting and/or storing digital multimedia data are disclosed. Digital multimedia data is organized into channel blocks, which include columns of data. A priority is determined for each channel block, based on the data within the channel block. Different forward error correction (FEC) procedures may be selected for the channel blocks based on their priority. Also, channel blocks may be transmitted on different transmission channels, and/or stored on different storage elements, based on their priority. Also disclosed is the coding, as pre-interleaved channel blocks, of digital multimedia data having fixed-length segments. The fixed-length segments are ordered and arranged in pre-interleaved channel blocks containing rows and columns. Pre-interleaving of a channel block arranges consecutive fixed-length segments along its columns. FEC data is determined for each row and included in the channel block.

US Patent:

7062096, Jun 13, 2006

Filed:

Jul 29, 2002

Appl. No.:

10/206368

Inventors:

Wanrong Lin - Plainsboro NJ, US
Dennis Bushmitch - Somerset NJ, US

Assignee:

Matsushita Electric Industrial Co., Ltd. - Osaka

International Classification:

G06K 9/36
G06K 9/46

US Classification:

382232, 382233, 382244, 35842613, 37524023

Abstract:

An apparatus and method for performing bitplane coding with reordering, that may be used in a Fine Granularity Scalability (FGS) system. The apparatus and method reorder coefficients each time after a bitplane is coded. By reordering, the apparatus and method separate the coefficients into two groups. When coding a bitplane, bits in the first group are copied into the bitstream, while the bits in the second group are subject to common run-length, VLC, or arithmetic coding. The apparatus and method may also be used with or in a conventional SNR, temporal and/or spatially scalable architectures, for example, as utilized within an MPEG-4 framework.

US Patent:

7174047, Feb 6, 2007

Filed:

Mar 29, 2002

Appl. No.:

10/112568

Inventors:

Wanrong Lin - Plainsboro NJ, US
Anton Margoline - Brooklyn NY, US
Dennis Bushmitch - Somerset NJ, US

Assignee:

Matsushita Electric Industrial Co., Ltd. - Osaka

International Classification:

G06K 9/46

US Classification:

382250, 382245

Abstract:

In a video encoder/decoder, a method processes a discrete cosine transform (DCT) block of coefficients. The method receives a DCT block of coefficients, and linearizes the DCT block of coefficients into a one dimensional array of sequentially arranged coefficients. The method stores a portion of the one dimensional array of coefficients in a register, the portion including at least two sequentially arranged coefficients. The stored portion of coefficients in the register is processed. A next portion of coefficients in the one dimensional array is processed. This is repeated until the entire DCT block of coefficients have been loaded into the register. The processing may include computing a run length value, finding a class number, or determining dequantized coefficients of a DCT block.

US Patent:

7761571, Jul 20, 2010

Filed:

Jul 19, 2004

Appl. No.:

10/894469

Inventors:

Dennis Bushmitch - Somerset NJ, US
Alan Kaplan - Princeton NJ, US
Wanrong Lin - Princeton NJ, US

Assignee:

Panasonic Corporation - Osaka

International Classification:

G06F 15/173
G06F 15/16

US Classification:

709226, 709227, 709230

Abstract:

An improved services gateway environment is provided within a gateway framework. The improvement comprising a SIP service architecture that enables SIP entities to register with itself and translates such registrations into gateway aware registrations.

US Patent:

20020150157, Oct 17, 2002

Filed:

Dec 21, 2000

Appl. No.:

09/742535

Inventors:

Wanrong Lin - Plainsboro NJ, US
Dennis Bushmitch - Somerset NJ, US

International Classification:

H04N007/12

US Classification:

375/240200, 375/240230, 375/240240

Abstract:

A simple and efficient scheme is used to predict the number of bits needed to block of discrete cosine transform (DCT) coefficients with variable length coding (VLC). The scheme defines an easily computable parameter that has a strong correlation with the number of bits needed to encode the DCT data. Then a second order polynomial is developed to approximate the correlation and is used to predict the number of VLC bits that will be produced if a corresponding quantization matrix is used. The approach can be used to streamline the encoding/transcoding process for DV, and the result on that is presented. A further feature is the ability to present multiple results for multiple quantization matrixes.

US Patent:

20050182816, Aug 18, 2005

Filed:

Feb 12, 2004

Appl. No.:

10/777905

Inventors:

Wanrong Lin - Princeton NJ, US
Alan Kaplan - Princeton NJ, US
Mahfuzur Rahman - South Brunswick NJ, US
Jay Gopal - Plainsboro NJ, US
Dennis Bushmitch - Somerset NJ, US
Deanna Wilkes-Gibbs - Palo Alto CA, US

International Classification:

G06F009/46

US Classification:

709200000

Abstract:

Presence and availability information is disseminated through a computer system architecture having four interactive elements. A schedule publication element acquires information about user schedules. A schedule management element communicates with the publication element to acquire schedule information and to store integrated schedule information in a storage system. A schedule distribution element acquires schedule information from the schedule management element and selectively disseminates the information to subscribers who have interacted with a schedule subscribing element. Both current and future presence and availability information is thus collected and disseminated in an orderly manner.

US Patent:

20050206721, Sep 22, 2005

Filed:

Mar 22, 2004

Appl. No.:

10/805904

Inventors:

Dennis Bushmitch - Somerset NJ, US
Alan Kaplan - Princeton NJ, US
Wanrong Lin - Plainsboro NJ, US

International Classification:

H04N007/14
H04M003/42
G06F015/16

US Classification:

348014090, 709204000

Abstract:

A method and apparatus is disclosed for disseminating information associated with an active conference participant in a conference call to conference participants. Information is disseminated by associating the conference participants with participant information, identifying an active conference participant supplying data to a conference bridge for broadcast to the other conference participants, and transmitting at least a portion of the participant information associated with the active conference participant over a data network to the conference participants substantially concurrent with the broadcast of the data by the conference bridge.