JAMES EDGAR ALLEN
Pilots at Central Blvd, Hayward, CA

License number

California A2555616

Issued Date

Sep 2015

Expiration Date

Sep 2017

Professional information

N-Bit Parity Neural Network Encoder

US Patent:

5412670, May 2, 1995

Filed:

Nov 30, 1992

Appl. No.:

7/983659

Inventors:

David G. Stork - Stanford CA
James D. Allen - Castro Valley CA

Assignee:

Ricoh Corporation - Menlo Park CA
Ricoh Company Ltd. - Tokyo

International Classification:

G06F 1110

US Classification:

371 492

Abstract:

A three layer artificial neural network having an N terminal input, a two cell hidden and a single cell output layer generates an output parity signal indicating whether an even or an odd number of binary bits are asserted at the N terminal input. The two hidden layer neural cells have activation functions that cause deviations about a linear response characteristic that allow the classification of a signal representative of the number of asserted input bits into odd and even groups. This network represents a significant reduction in the number of hidden units previously required because of the particular form of activation transfer characteristic used in the two hidden layer neural cells.

Apparatus For A Neural Network One-Out-Of-N Encoder/Decoder

US Patent:

5268684, Dec 7, 1993

Filed:

Jan 7, 1992

Appl. No.:

7/817549

Inventors:

James Allen - Castro Valley CA
David G. Stork - Stanford CA

Assignee:

Ricoh Corporation - Menlo Park CA
Ricoh Company Ltd. - Tokyo

International Classification:

H03M 700

US Classification:

341 75

Abstract:

An artificial network for encoding the binary on-state of one-out-of-N inputs, say j, when only one state is on at a time wherein the jth on-state is represented by a suitable output level of an N-input MP type neuron operating in the non-saturated region of the neuron output nonlinearity. A single line transmits the encoded amplitude level signal to a decoder having N single input neural networks. The N outputs of the decoder are in the off-state except for the output corresponding to the active input node of the encoder.

Method And Apparatus For Limiting The Number Of A Compressed Output Type In A Compression/Decompression System

US Patent:

5535290, Jul 9, 1996

Filed:

Sep 11, 1995

Appl. No.:

8/526758

Inventors:

James D. Allen - Castro Valley CA

Assignee:

Ricoh Corporation - Menlo Park CA
Ricoh Company Ltd. - Tokyo

International Classification:

G06K 936

US Classification:

382250

Abstract:

A method and apparatus for reducing the necessary size of a buffer between two cascaded decoding stages is described. The present invention includes a method and apparatus for encoding data into multiple blocks of data. The present invention also includes a method and apparatus for encoding the multiple blocks of data into multiple symbols. This encoding includes a method and apparatus for limiting the multiple symbols to a predetermined number of symbols. By limiting the symbols encoded, the buffer after the decoding stage is limited so that the size of the buffer memory to buffer decompressed data output from the decoding stage is reduced.

Data Encoding Using One Or More Adaptive Decision Trees

US Patent:

5379355, Jan 3, 1995

Filed:

Aug 24, 1992

Appl. No.:

7/934764

Inventors:

James D. Allen - Castro Valley CA

Assignee:

Ricoh Corporation - Menlo Park CA
Ricoh Company Ltd. - Tokyo

International Classification:

G06K 936, H04B 166

US Classification:

382 56

Abstract:

A method and apparatus for quantizing a stream of data at a predetermined bit compression ratio. A binary decision tree is established for classifying the error between a predicted and actual data value. The binary decision tree comprising a root node and multiple binary nodes represented by a pair of threshold values around the root node, a member of each pair representing a node in the binary decision tree and a threshold value indicative of a range of data values. The range in which the data values lies is then determined and a binary code representing the quantized error (token) between the predicted and actual data values. The quantized error symbol (token) is then encoded and a bit string corresponding to the error symbol is output, thereby representing compressed data. After a predetermined number of errors have been quantized (and encoded), the bit rate of the compressed data is compared to a predetermined (target) compression ratio. The ranges used to quantize the error are then adjusted to maintain the predetermined compression ratio.

Conditioner Assembly For A Chemical Mechanical Polishing Apparatus

US Patent:

6042457, Mar 28, 2000

Filed:

Jul 10, 1998

Appl. No.:

9/113614

Inventors:

Ethan C. Wilson - Sunnyvale CA
James A. Allen - Hayward CA
David E. Weldon - Santa Clara CA
Gregory C. Lee - Sunnyvale CA
Linh X. Can - San Jose CA
Jeffrey M. L. Fontana - Fremont CA
Jade Jaboneta - San Jose CA

Assignee:

Aplex, Inc. - Sunnyvale CA

International Classification:

B24B 100

US Classification:

451 56

Abstract:

A conditioner assembly and a conditioner back support for conditioning a polishing pad of a chemical mechanical polishing device. The conditioner assembly comprises a conditioning head having a gimbal assembly, a shaft engaged to the conditioning head, and a linear torque bearing assembly slidably receiving the shaft. The linear torque bearing assembly is configured to operatively rotate the shaft assembly contemporaneously with allowing the shaft to extend and retract from a first open end of the linear torque bearing assembly. The conditioner assembly additionally comprises a bellows secured over the first open end and engaged to the conditioning head and a bearing housing disposed over a second open end of the linear torque bearing assembly. The bearing housing rotatably supports the linear torque bearing assembly such that a motor assembly can operatively drive the linear torque bearing assembly, the shaft, and the conditioning head. The conditioner back support respectively opposes the conditioner assembly such that the polishing belt supporting the polishing pad is disposed intermediate to the conditioner back support and the conditioner assembly.

Method And Apparatus For Using Finite State Machines To Perform Channel Modulation And Error Correction And Entropy Coding

US Patent:

5475388, Dec 12, 1995

Filed:

Oct 22, 1993

Appl. No.:

8/142504

Inventors:

Michael J. Gormish - Stanford CA
James D. Allen - Castro Valley CA

Assignee:

Ricoh Corporation - Menlo Park CA
Ricoh Company Ltd. - Tokyo

International Classification:

H03M 740, H03M 1300

US Classification:

341107

Abstract:

The present invention provides an encoding and decoding apparatus used for the compression and expansion of data. A state machine is provided having a plurality of states. Each state has at least one transition pair. Each element of the transition pair comprises zero or more bits representative of the compact code to be output and the identification of the next state to proceed to. The transition pair reflects an output for a yes and no response associated with the probability of the data to be compacted and whether the data falls within that probability.

Huffman Decoder Architecture For High Speed Operation And Reduced Memory

US Patent:

5325092, Jun 28, 1994

Filed:

Jul 7, 1992

Appl. No.:

7/909903

Inventors:

James Allen - Castro Valley CA
Martin Boliek - Palo Alto CA
Edward L. Schwartz - Sunnyvale CA
David Bednash - Palo Alto CA

Assignee:

Ricoh Company, Ltd. - Menlo Park CA

International Classification:

H03M 740

US Classification:

341 65

Abstract:

Various Huffman decoder architectures are presented. By these decoder architectures, more than one codeword in a stream of Huffman-coded data units may be decoded into more than one token in a single decoding operation on average. An efficient memory organization which is useful in many of these decoder architectures is also presented.

Method And Apparatus For Parallel Decoding And Encoding Of Data

US Patent:

5381145, Jan 10, 1995

Filed:

Feb 10, 1993

Appl. No.:

8/016035

Inventors:

James D. Allen - Castro Valley CA
Matin Boliek - Palo Alto CA
Edward L. Schwartz - Sunnyvale CA

Assignee:

Ricoh Corporation - Menlo Park CA
Ricoh Company Ltd. - Tokyo

International Classification:

H03M 730

US Classification:

341107

Abstract:

The present invention provides a method and apparatus for encoding and decoding data in parallel. The present invention provides a system for decompressing a data stream having multiple codewords. The system includes an input channel that receives the data stream. The system also includes a decoder which decodes each bit of the data stream, wherein at least two of the codewords in the data stream are decoded at the same time, such that the data stream is decoded in parallel.

Sensor Driven Global Motion Compensation

US Patent:

5430480, Jul 4, 1995

Filed:

Mar 7, 1994

Appl. No.:

8/207244

Inventors:

James Allen - Castro Valley CA
Martin Boliek - Palo Alto CA
Steven Blonstein - San Jose CA
Michael Gormish - Stanford CA

Assignee:

Ricoh California Research Center - Menlo Park CA

International Classification:

H04N 5228

US Classification:

348208

Abstract:

A motion sensor is mounted within a camera, and measures motion data such as translation, rotation, and zoom. The motion data is then associated with the video frame data captured by the camera. In some embodiments, the motion data is used to remove jitter in the frame data due to camera movement, and in some embodiments, the motion data is used to remove global motion from frame data before compression. Since the motion data is kept with the video frame data, the motion data is available during decompression of the video frames.