William B Lynch

US Patent:

6381280, Apr 30, 2002

Filed:

May 29, 1998

Appl. No.:

09/087449

Inventors:

William C. Lynch - Palo Alto CA
Krasimir D. Kolarov - Menlo Park CA
D. Robert Hoover - Cupertino CA
William J. Arrighi - El Cerrito CA

Assignee:

Interval Research Corporation - Palo Alto CA

International Classification:

H04N 712

US Classification:

37524019

Abstract:

A motion wavelet transform zero tree codec achieves high compression and is implemented in hardware of modest size and at very low cost. A wavelet transform is combined with a tree walk technique for encoding the resulting wavelet coefficients. A 2-6 wavelet transform is used. Wavelet coefficients from the transform are represented in a pyramid of wavelet coefficients. An array of zero trees are formed from the pyramid to hold the wavelet coefficients, one coefficient to each node. Significance values for each node are calculated to assist with the tree walk and encoding. Each zero tree is traversed to produce an output of encoded bits. Encoded bits are output directly during the tree walk.

US Patent:

6396948, May 28, 2002

Filed:

May 14, 1998

Appl. No.:

09/079427

Inventors:

William C. Lynch - Palo Alto CA
Krasimir D. Kolarov - Menlo Park CA
D. Robert Hoover - Cupertino CA
William J. Arrighi - El Cerrito CA

Assignee:

Interval Research Corporation - Palo Alto CA

International Classification:

G06K 900

US Classification:

382166, 382235, 3483911

Abstract:

A technique for compressing video images uses temporary compression of blocks during compression, integrated color rotation of compressed images, direct compression of a composite video signal, and border filters to allow blocks to be compressed independently. Temporary compression reduces storage needed in an integrated circuit. An incoming frame is compressed block-by-block and placed in temporary storage. A corresponding block of a later frame is also compressed. Both blocks are decoded back into the transform domain and the two blocks are compared in the transform domain. Color rotation on compressed color information is integrated with overall compression and is performed upon the chrominance transform pyramids after transformation of the video signal rather than performing a rotation on the raw signal itself. Color rotation is performed at any stage and uses serial multiplication (shift and add) for more efficient processing, rather than using parallel multiplication. A composite video signal including both color and black and white information is compressed directly without separating the color information from the black and white.

US Patent:

6424820, Jul 23, 2002

Filed:

Apr 2, 1999

Appl. No.:

09/285511

Inventors:

Wayne A. Burdick - Belmont CA
James H. Boyden - Los Altos Hills CA
William C. Lynch - Palo Alto CA

Assignee:

Interval Research Corporation - Palo Alto CA

International Classification:

H04B 500

US Classification:

455 41, 455568, 4551512, 455132

Abstract:

A short range inductively coupled wireless communication system employs analog frequency modulation of a high frequency carrier and magnetic coupling between a transmitting antenna and a receiving antenna. A transmitter coupled to the transmitting antenna modulates multiple high-fidelity analog audio signals and digital control messages onto separate high frequency (âHFâ) carriers. The electric field portion of the transmitted electromagnetic field is substantially eliminated during transmission, while the magnetic field portion is substantially unaffected. The receiving antenna is coupled to a demodulator which reproduces the audio frequency signals and decodes control messages sent by the transmitter.

US Patent:

6516030, Feb 4, 2003

Filed:

May 14, 1998

Appl. No.:

09/079104

Inventors:

William C. Lynch - Palo Alto CA
Krasimir D. Kolarov - Menlo Park CA
D. Robert Hoover - Cupertino CA
William J. Arrighi - El Cerrito CA

Assignee:

Interval Research Corporation - Palo Alto CA

International Classification:

H04N 1102

US Classification:

37524011, 382166, 382268

Abstract:

A technique for compressing video images uses temporary compression of blocks during compression, integrated color rotation of compressed images, direct compression of a composite video signal, and border filters to allow blocks to be compressed independently. Temporary compression reduces storage needed in an integrated circuit. An incoming frame is compressed block-by-block and placed in temporary storage. A corresponding block of a later frame is also compressed. Both blocks are decoded back into the transform domain and the two blocks are compared in the transform domain. Color rotation on compressed color information is integrated with overall compression and is performed upon the chrominance transform pyramids after transformation of the video signal rather than performing a rotation on the raw signal itself. Color rotation is performed at any stage and uses serial multiplication (shift and add) for more efficient processing, rather than using parallel multiplication. A composite video signal including both color and black and white information is compressed directly without separating the color information from the black and white.

US Patent:

6570924, May 27, 2003

Filed:

Nov 19, 1999

Appl. No.:

09/444226

Inventors:

William C. Lynch - Palo Alto CA
Krasimir D. Kolarov - Menlo Park CA
William J. Arrighi - El Cerrito CA

Assignee:

Interval Research Corp - Palo Alto CA

International Classification:

H04N 712

US Classification:

37524019, 37524011, 37524015

Abstract:

An entropy efficient video coder for wavelet pyramids approaches the entropy-limited coding rate of video wavelet pyramids, is fast in both hardware and software implementations, and has low complexity (no multiplies) for use in ASICs. It uses a modified Z-coder to code the zero/non-zero significance function and Huffman coding for the non-zero coefficients themselves. The encoding unit includes a significance function generator that receives coefficients and outputs a single significance bit. A zero coefficient eliminator receives coefficients in parallel with the significance function generator and outputs coefficients if non-zero. Output from the significance function generator is coded using the modified Z-coder. Output from the zero coefficient eliminator is coded using Huffman coding. Both outputs are combined to form the resulting compressed stream.

US Patent:

6597683, Jul 22, 2003

Filed:

Sep 10, 1999

Appl. No.:

09/393121

Inventors:

Stephan Gehring - Palo Alto CA
William Lynch - Palo Alto CA
Krisnawan Rahardja - San Jose CA
Gerald Rogerson - Morgan Hill CA
Carlton J. Sparrell - Palo Alto CA

Assignee:

Pulse-Link, Inc. - San Diego CA

International Classification:

H04B 7212

US Classification:

370348, 370347, 370349, 370350, 370229, 455422, 455450, 455451, 455452, 455516

Abstract:

A Medium Access Control protocol software architecture which comprises a microcode component providing the protocol implementation level functions and an engine component providing hardware level functions. The Medium Access Control protocol and method for use in a network system allows for centralized management of all MAC-level services by a master device. The Medium Access Control protocol provides an improved protocol message throughput via the sequence retransmission request protocol scheme. The Medium Access Control protocol provides a reduced data transmission latency and provides dynamic allocation of data slots within a Time Division Multiple Access frame definition. The Medium Access Control protocol also provides a set of failure management functions and power control support.

US Patent:

6847317, Jan 25, 2005

Filed:

May 28, 2003

Appl. No.:

10/447467

Inventors:

William C. Lynch - Palo Alto CA, US
Krasimir D. Kolarov - Menlo Park CA, US
Steven E. Saunders - Cupertino CA, US

Assignee:

Droplet Technology, Inc. - Cupertino CA

International Classification:

H03M 700
H03M 740

US Classification:

341107, 341 67

Abstract:

A coder and/or decoder system and method are provided including a variable modulus. As an option, the modulus may reflect a steepness of a probability distribution curve associated with a compression algorithm (i. e. a negative exponential of the probability distribution). Moreover, the modulus may depend on a context of a previous set of data, while avoiding increasing as a function of a run length (i. e. a plurality of identical bits in a sequence).

US Patent:

6934609, Aug 23, 2005

Filed:

Jul 10, 2003

Appl. No.:

10/618314

Inventors:

Larry H. Capots - Mountain View CA, US
William C. Lynch - Los Altos CA, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

H04Q007/00

US Classification:

701 13, 701226, 455 131, 455427

Abstract:

Spacecraft network and communication method thereof. A spacecraft network includes a first server spacecraft disposed in a first server orbit, a first client spacecraft disposed in a first client orbit, and a wireless local area network formed between at least the first server spacecraft and the first client spacecraft. The wireless local area network includes at least one communication channel to transmit and receive spatial information, at least one receiver to receive a first communication signal including at least routing information, at least one routing system to determine a desired route, and one transmitter to transmit the first communication signal. The first client spacecraft is free from the at least one routing system, and the first server spacecraft includes one of the at least one routing system.