Feng F Chen

US Patent:

D634248, Mar 15, 2011

Filed:

Feb 12, 2010

Appl. No.:

29/355777

Inventors:

Feng Li Chen - Alhambra CA, US

International Classification:

1216

US Classification:

D12177

US Patent:

20130294377, Nov 7, 2013

Filed:

Jul 2, 2013

Appl. No.:

13/933510

Inventors:

Jonathan S. Min - Fullerton CA, US
Lisa V. Denney - Suwanee GA, US
Henry Samueli - Corona del Mar CA, US
Sean F. Nazareth - Irvine CA, US
Feng Chen - Irvine CA, US
Fang Lu - Rowland Heights CA, US
Christopher R. Jones - Newport Beach CA, US

International Classification:

H04W 72/08

US Classification:

370329

Abstract:

A number of features for enhancing the performance of a communication system, in which data is transmitted between a base station and a plurality of subscriber stations located different distances from the base station, are presented. The power transmission level, slot timing, and equalization of the subscriber stations are set by a ranging process. Data is transmitted by the subscriber stations in fragmented form. Various measures are taken to make transmission from the subscriber stations robust. The uplink data transmission is controlled to permit multiple access from the subscriber stations.

US Patent:

58259309, Oct 20, 1998

Filed:

Mar 5, 1997

Appl. No.:

8/811189

Inventors:

Dong-seek Park - Daegu, KR
John Villasenor - Los Angeles CA
Feng Chen - Los Angeles CA

Assignee:

Samsung Electronics Co., Ltd. - Kyungki-Do
The Regents of the University of California - Oakland CA

International Classification:

G06K 936

US Classification:

382236

Abstract:

A motion estimating method for determining a motion vector, using a bit rate-distortion technique in image compression. The motion estimating method includes the steps of obtaining a motion vector (x. sub. o, y. sub. o) which minimizes a predetermined error function, assuming a preferred motion vector (x, y), calculating the difference (x-diff, y-diff) between (x. sub. o, y. sub. o) and (x, y), obtaining the number of bits needed to encode the x-diff and y-diff, determining a bias based on a bias model according to the bit number, obtaining a final cost function value based on the difference between a cost function value and a bias, comparing the final cost function value with a predetermined allowance limit, determining the assumed motion vector (x, y) as a motion vector for a current macroblock and updating the allowance limit by using the cost function value, if the cost function value is smaller than the predetermined allowance limit and discarding the assumed motion vector (x, y) if the cost function value is not smaller than the predetermined allowance limit. The disclosed method is successful in increasing the compression rate.