Patents by Inventor Robert John Schwendeman
Robert John Schwendeman 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: 5974180Abstract: A text compression technique used in a transmitter subsystem (126, 148) and a receiver subsystem (132, 158) for compressively encoding and decoding a text portion of a message by using tokens having at least two data symbol lengths. During encoding, a quantity of fill symbols are added to a sequence of secondary tokens, wherein the quantity of fill symbols is determined such that a total quantity of the data symbols in the sequence is equal to an integral multiple of the quantity of the data symbols having a first data symbol length. Delimiting characters such as spaces which precede a sequence of characters corresponding to a primary token are indicated by setting one data symbol in each primary token to a predetermined value. Sequences of capitalized characters are indicated by predetermined command tokens.Type: GrantFiled: January 2, 1996Date of Patent: October 26, 1999Assignee: Motorola, Inc.Inventor: Robert John Schwendeman
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Patent number: 5920840Abstract: A method and apparatus for time-scale modification of speech using a modified version of the Waveform Similarity based Overlap-Add technique (WSOLA) comprises the steps of storing a portion of an input speech signal in a memory, analyzing the portion of the input speech signal to determined at least one filtered pitch value, calculating an estimated pitch value (12) from the at least one filtered pitch value, determining a segment size (14) in response to the estimated pitch value (12), the segment size (14) having a value greater than the estimated pitch value (12), and time-scale compressing (18) the input speech signal in response to the segment size determined.Type: GrantFiled: February 28, 1995Date of Patent: July 6, 1999Assignee: Motorola, Inc.Inventors: Sunil Satyamurti, Clifford Dana Leitch, Robert John Schwendeman, Kazimierz Siwiak, William Joseph Kuznicki
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Patent number: 5805977Abstract: A two-way selective call communication system (FIG. 1) controls transmissions in a dominant cell (504) of a plurality of cells (502, 504) utilizing a common radio frequency for sending messages (408). The dominant cell carries significantly greater traffic than any other cell of the plurality of cells. A controller (112) groups (808, 906), into a first time period (708), the transmissions of non-dominant cell messages which interfere with the transmissions of dominant cell messages. The controller then determines a subset of the dominant cell messages that require a higher signal-to-interference ratio than available in the dominant cell during the first time period. The controller then transmits (908) the subset during a second time period (710) different from the first time period.Type: GrantFiled: April 1, 1996Date of Patent: September 8, 1998Assignee: Motorola, Inc.Inventors: Thomas Casey Hill, Thomas V. D'Amico, Robert John Schwendeman
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Patent number: 5757281Abstract: An improved acknowledge-back paging system which returns variable amounts of information requested to the individual or device requesting the information. The system uses a selective call receiver that receives a signal requesting information from the selective call receiver. In response to the signal, multiple acknowledge-back signals comprising the information are transmitted to a receiving station.Type: GrantFiled: April 21, 1992Date of Patent: May 26, 1998Assignee: Motorola, Inc.Inventors: Robert John Schwendeman, William Joseph Kuznicki
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Patent number: 5710639Abstract: A selective call receiver includes a receiver (103), a controller (105), and a display (113) for presenting a recovered source document. The receiver (103) provides a received paging message that was generated from the facsimile message of the original source document (208). The received paging message is interpreted and decoded by the controller (105). Using the display (113), a decoded scan line compressed document (1101) is presented in a format that substantially resembles the facsimile message of the original source document (1100).Type: GrantFiled: January 25, 1996Date of Patent: January 20, 1998Inventors: William Joseph Kuznicki, Robert John Schwendeman, Gregg Edward Rasor
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Patent number: 5710766Abstract: In a radio communication system a method and apparatus enables sharing a bandwidth between two protocols that can support different maximum numbers of subchannels (510-516, 602-614) in the bandwidth. The protocols utilize transmission frames (402) having frame durations (716) that are integer multiples of one another. A fixed portion (102) of the system synchronizes (1002) the frames of the two protocols and determines (1004) a sharing plan for the subchannels utilized by each protocol. The sharing plan applies to a subsequent group of frames. The fixed portion vectors (1008) a portable receiver (122, 123) that has a message to be received in accordance with the sharing plan prior to transmission of the subsequent group of frames. Both the fixed portion and the portable receiver share (1010) the bandwidth between the two protocols in accordance with the sharing plan during transmission of the subsequent group of frames.Type: GrantFiled: December 26, 1995Date of Patent: January 20, 1998Assignee: Motorola, Inc.Inventor: Robert John Schwendeman
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Patent number: 5689440Abstract: The present invention comprises a method for compressing a plurality of voice signals within a voice communication resource (see FIG. 6) having a given bandwidth within a voice communication system (100). The method comprises the steps of subchanneling the voice communication resource into a plurality of subchannels (441, 442, 443), placing a pair of the plurality of voice signals (401, 402) on a subchannel (441); modulating the pair of the plurality of voice signals (401, 402) about a pilot signal (581) within the subchannel (441) using single sideband modulation; and compressing the time of each of the voice signals (401, 402) within the plurality of subchannels (441, 442, 443), wherein these step provide a compressed voice signal.Type: GrantFiled: December 11, 1996Date of Patent: November 18, 1997Assignee: Motorola, Inc.Inventors: Clifford Dana Leitch, Robert John Schwendeman, Kazimierz Siwiak, William Joseph Kuznicki, Sunil Satyamurti
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Patent number: 5689805Abstract: A communication system (100) providing minimum transmission delay for message delivery to communication transceivers (510) includes a plurality of transmission cells (102, 104) which include one or more receivers (512) and a transmitter (506) and which define geographical transmission areas. The transmitter (506) transmits an address identifying the communication transceiver (510) for which a message is intended and a color code identifying the transmitter (506) during a first scheduled transmission time interval (212). At least one receiver (512) located within the transmission cells (102, 104) receives an acknowledgment including the address and color code generated by the communication transceiver (510) during a second scheduled transmission time interval (216).Type: GrantFiled: October 10, 1995Date of Patent: November 18, 1997Assignee: Motorola, Inc.Inventors: Douglas I. Ayerst, William Joseph Kuznicki, Robert John Schwendeman
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Patent number: 5686898Abstract: A method by which a data communication receiver may recognize a specific channel comprises the steps of receiving (1605) a data stream on a first channel for a first amount of time to determine (1680) whether network identification information is included in the data stream received on the first channel, wherein the network identification information comprises at least one address assigned to represent a network. If the network identification information is not included in the data stream received on the first channel within the first amount of time, reception is switched (1614) to receive (1605) a data stream on a second channel. The method further comprises the step of receiving (1605) the data stream on the second channel for a second amount of time to determine (1680) whether the network identification information is included in the data stream received on the second channel.Type: GrantFiled: October 20, 1995Date of Patent: November 11, 1997Assignee: Motorola, Inc.Inventors: David Frank Willard, Robert John Schwendeman, Michael Joseph DeLuca
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Patent number: 5649289Abstract: A two-way messaging system (100) having a plurality of message subscriber units (500) and a base station (220) in each of a plurality of cells (210). The base station has a transmitter (224) for transmitting messages in an associated cell (210) and a receiver (228) associated therewith for receiving response signals from message subscriber units in a cell. A system controller (300) is coupled to each base station (220) and has a memory (320) for storing the customer paging area data for each message subscriber unit. The system controller (300) receives message requests and automatically updates the customer paging area data for each message subscriber unit (500) by tracking the mobility pattern of each message subscriber unit (500) in the messaging system coverage area (200).Type: GrantFiled: July 10, 1995Date of Patent: July 15, 1997Assignee: Motorola, Inc.Inventors: Zhonghe Wang, Robert John Schwendeman