William W Kim

US Patent:

55394710, Jul 23, 1996

Filed:

May 3, 1994

Appl. No.:

8/254363

Inventors:

Nathan P. Myhrvold - Bellevue WA
Gideon A. Yuval - Mercer Island WA
William E. Kim - Redmond WA

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

H04N 708

US Classification:

348473

Abstract:

A system and method for inserting a data signal into a preexisting video signal in a transmitter so that the data signal is transmitted along with the video signal. The data signal is inserted into an unused portion of the video signal spectrum. The data signal is separated from the video signal in a receiver and may be used for any purpose, even purposes unrelated to the video signal. The data signal is filtered to create a filtered data signal having spectral characteristics that correspond to the unused portion of the video signal spectrum. The filtered signal modulates a carrier signal whose frequency is selected to permit direct insertion of the modulated filtered data signal into the video signal spectrum. In the receiver, the video signal is processed in a normal manner; and the data signal is undetected by normal television receivers. A signal separator separates the filtered data signal from the combined video signal, and an inverse filter recovers the original data signal.

US Patent:

58016643, Sep 1, 1998

Filed:

Feb 12, 1996

Appl. No.:

8/600410

Inventors:

Robert B. Seidensticker - Woodinville WA
William E. Kim - Seattle WA

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G09G 500

US Classification:

345 2

Abstract:

A data transmission system includes a programmable portable information device, a frame-scanning graphics display device (e. g. , a CRT monitor), and a display device controller (e. g. , a personal computer). The display device controller supplies pixel data to the frame-scanning graphics display device which causes the display device to depict a particular changing optical pattern. To display the particular pattern, the frame-scanning graphics display device inherently fluctuates in energy output as different pixel intensities require different degrees of power. As a result, the frame-scanning graphics display device effectively emits an RF carrier signal. The programmable portable information device is equipped with an RF receiver that can receive the RF signal from the display device when the programmable portable information device is within a transmission range. The RF carrier signal is modulated to carry programming data to the portable information device. The portable information device demodulates the RF signal to obtain the digital data stream.

US Patent:

57084769, Jan 13, 1998

Filed:

Jul 22, 1996

Appl. No.:

8/681083

Inventors:

Nathan P. Myhrvold - Bellevue WA
Gideon A. Yuval - Mercer Island WA
William E. Kim - Redmond WA

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

H04N 708

US Classification:

348473

Abstract:

A system and method for inserting a data signal into a preexisting video signal in a transmitter so that the data signal is transmitted along with the video signal. The data signal is inserted into an unused portion of the video signal spectrum. The data signal is separated from the video signal in a receiver and may be used for any purpose, even purposes unrelated to the video signal. The data signal is filtered to create a filtered data signal having spectral characteristics that correspond to the unused portion of the video signal spectrum. The filtered signal modulates a carrier signal whose frequency is selected to permit direct insertion of the modulated filtered data signal into the video signal spectrum. In the receiver, the video signal is processed in a normal manner; and the data signal is undetected by normal television receivers. A signal separator separates the filtered data signal from the combined video signal, and an inverse filter recovers the original data signal.

US Patent:

58124306, Sep 22, 1998

Filed:

Jun 2, 1997

Appl. No.:

8/867086

Inventors:

Steven J. Altschuler - Redmond WA
William E. Kim - Seattle WA
Lani F. Wu - Redmond WA

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 300
G06F 500

US Classification:

364572

Abstract:

A method, system and computer product for allowing efficient user interaction with digital time-based signals. User control and filter information (symbolic, procedural or a combination of both) are optimized for greatly improving calculating efficiency. First, filters are symbolically optimized. Then, a single optimized procedure is generated and compiled into an optimized procedure code. The procedure code then processes the input signal according to control information.