Patents by Inventor Michael W. Pflaumer
Michael W. Pflaumer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6337645Abstract: An analog-to-digital converter responsive to an analog signal converts the analog signal to a digital signal. A digital decimation filter, having an associated frequency response, is responsive to the digital signal for producing a decimated digital signal. An alias correction filter attenuates the decimated digital signal to remove distortion. A digital interpolation filter, having an associated frequency response, is responsive to the alias-corrected signal for producing an interpolated digital signal which subsequently is converted to an analog signal by a digital-to-analog converter. The alias correction filter has a frequency response that attenuates the decimated digital signal in a frequency range generally corresponding to a distortion portion that is present within the combination of the digital decimation filter frequency response and the digital interpolation filter frequency response.Type: GrantFiled: March 9, 2000Date of Patent: January 8, 2002Assignee: Microsoft CorporationInventor: Michael W. Pflaumer
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Patent number: 5872531Abstract: An electronic method and apparatus for signal encoding and decoding to provide ultra low distortion reproduction of analog signals, while remaining compatible with industry standardized signal playback apparatus not incorporating the decoding features of the invention, and wherein the improved system provides an interplay of gain, slew rate and wave synthesis operations to reduce signal distortions and improve apparent resolution, all under the control of concealed control codes for triggering appropriate decoding signal reconstruction compensation complementing the signal analysis made during encoding. In addition, signals lacking the encoding process features of the invention are likewise compatible with playback decoders which do embody the invention, to provide some overall restoration enhancement.Type: GrantFiled: February 11, 1997Date of Patent: February 16, 1999Assignee: Pacific Microsonics, Inc.Inventors: Keith O. Johnson, Michael W. Pflaumer
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Patent number: 5864311Abstract: An electronic method and apparatus for signal encoding and decoding to provide ultra low distortion reproduction of analog signals, while remaining compatible with industry standardized signal playback apparatus not incorporating the decoding features of the invention, and wherein the improved system provides an interplay of gain, slew rate and wave synthesis operations to reduce signal distortions and improve apparent resolution, all under the control of concealed control codes for triggering appropriate decoding signal reconstruction compensation complementing the signal analysis made during encoding. In addition, signals lacking the encoding process features of the invention are likewise compatible with playback decoders which do embody the invention, to provide some overall restoration enhancement.Type: GrantFiled: February 18, 1997Date of Patent: January 26, 1999Assignee: Pacific Microsonics, Inc.Inventors: Keith O. Johnson, Michael W. Pflaumer
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Patent number: 5854600Abstract: An electronic method and apparatus for signal encoding and decoding to provide ultra low distortion reproduction of analog signals, while remaining compatible with industry standardized signal playback apparatus not incorporating the decoding features of the invention, and wherein the improved system provides an interplay of gain, slew rate and wave synthesis operations to reduce signal distortions and improve apparent resolution, all under the control of concealed control codes for triggering appropriate decoding signal reconstruction compensation complementing the signal analysis made during encoding. In addition, signals lacking the encoding process features of the invention are likewise compatible with playback decoders which do embody the invention, to provide some overall restoration enhancement.Type: GrantFiled: August 29, 1997Date of Patent: December 29, 1998Assignee: Pacific Microsonics, Inc.Inventors: Keith O. Johnson, Michael W. Pflaumer
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Patent number: 5838274Abstract: An electronic method and apparatus for signal encoding and decoding to provide ultra low distortion reproduction of analog signals, while remaining compatible with industry standardized signal playback apparatus not incorporating the decoding features of the invention, and wherein the improved system provides an interplay of gain, slew rate and wave synthesis operations to reduce signal distortions and improve apparent resolution, all under the control of concealed control codes for triggering appropriate decoding signal reconstruction compensation complementing the signal analysis made during encoding. In addition, signals lacking the encoding process features of the invention are likewise compatible with playback decoders which do embody the invention, to provide some overall restoration enhancement.Type: GrantFiled: January 13, 1997Date of Patent: November 17, 1998Assignee: Pacific Microsonics, Inc.Inventors: Keith O. Johnson, Michael W. Pflaumer
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Patent number: 5808574Abstract: An electronic method and apparatus for signal encoding and decoding to provide ultra low distortion reproduction of analog signals, while remaining compatible with industry standardized signal playback apparatus not incorporating the decoding features of the invention, and wherein the improved system provides an interplay of gain, slew rate and wave synthesis operations to reduce signal distortions and improve apparent resolution, all under the control of concealed control codes for triggering appropriate decoding signal reconstruction compensation complementing the signal analysis made during encoding. In addition, signals lacking the encoding process features of the invention are likewise compatible with playback decoders which do embody the invention, to provide some overall restoration enhancement.Type: GrantFiled: February 11, 1997Date of Patent: September 15, 1998Assignee: Pacific Microsonics, Inc.Inventors: Keith O. Johnson, Michael W. Pflaumer
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Patent number: 5640161Abstract: An electronic method and apparatus for signal encoding and decoding to provide ultra low distortion reproduction of analog signals, while remaining compatible with industry standardized signal playback apparatus not incorporating the decoding features of the invention, and wherein the improved system provides an interplay of gain, slew rate and wave synthesis operations to reduce signal distortions and improve apparent resolution, all under the control of concealed control codes for triggering appropriate decoding signal reconstruction compensation complementing the signal analysis made during encoding. In addition, signals lacking the encoding process features of the invention are likewise compatible with playback decoders which do embody the invention, to provide some overall restoration enhancement.Type: GrantFiled: May 31, 1995Date of Patent: June 17, 1997Assignee: Pacific Microsonics, Inc.Inventors: Keith O. Johnson, Michael W. Pflaumer
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Patent number: 5479168Abstract: An electronic method and apparatus for signal encoding and decoding to provide ultra low distortion reproduction of analog signals, while remaining compatible with industry standardized signal playback apparatus not incorporating the decoding features of the invention, and wherein the improved system provides an interplay of gain, slew rate and wave synthesis operations to reduce signal distortions and improve apparent resolution, all under the control of concealed control codes for triggering appropriate decoding signal reconstruction compensation complementing the signal analysis made during encoding. In addition, signals lacking the encoding process features of the invention are likewise compatible with playback decoders which do embody the invention, to provide some overall restoration enhancement.Type: GrantFiled: August 20, 1993Date of Patent: December 26, 1995Assignee: Pacific Microsonics, Inc.Inventors: Keith O. Johnson, Michael W. Pflaumer
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Patent number: 4884266Abstract: A local area network is disclosed including apparatus and methods for transmitting data between a plurality of data processing resources (agents) coupled to a cable. An agent desiring to send data to a receiving agent transmits a request to send (RTS) data packet which includes a control character requesting to either high or low speed data communication. Utilizing the teachings of the present invention, absent other predefined conditions a transmitting agent capable of high speed communication requests a high speed data exchange with the receiving agent. The RTS data packet itself is transmitted at low speed. Upon receiving the RTS packet, the receiving agent must transmit a clear to send (CTS) packet to the transmitting agent within a predetermined time after the receipt of the RTS packet.Type: GrantFiled: August 9, 1988Date of Patent: November 28, 1989Assignee: Sun Microsystems, Inc.Inventor: Michael W. Pflaumer