Patents by Inventor Ewa B. Hekstra

Ewa B. Hekstra 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).

  • Transmission system for transmitting a main signal and an auxiliary signal
    Patent number: 7154917
    Abstract: In a transmission system with a transmitter coupled to a receiver a main signal encoded according to a coding property is transmitted together with an auxiliary signal (AUX). In order to transmit the auxiliary signal without needing additional space in the the transmission frame, the auxiliary signal is transmitted by changing the coding property according to a predetermined sequence. This is done by means of the sequencer. In the receiver the decoding of the predetermined sequence is performed by a decoder.
    Type: Grant
    Filed: April 8, 2003
    Date of Patent: December 26, 2006
    Assignee: Koninklijke Philips Electronics, N.V.
    Inventors: Constant P. M. J. Baggen, Arie G. C. Koppelaar, Ewa B. Hekstra
  • Transmission system for transmitting a main signal and an auxiliary signal
    Publication number: 20030193971
    Abstract: In a transmission system with a transmitter (4) coupled to a receiver (6) a main signal (SPEECH INPUT) encoded according to a coding property is transmitted together with an auxiliary signal (AUX).
    Type: Application
    Filed: April 8, 2003
    Publication date: October 16, 2003
    Inventors: Constant P.M.J. Baggen, Arie G.C. Koppelaar, Ewa B. Hekstra
  • Transmission system for transmitting a main signal and an auxiliary signal
    Patent number: 6574247
    Abstract: In a transmission system with a transmitter coupled to a receiver a main signal encoded according to a coding property is transmitted together with an auxiliary signal (AUX). In order to transmit the auxiliary signal without needing additional space in the transmission frame, the auxiliary signal is transmitted by changing the coding property according to a predetermined sequence. This is done by means of the sequencer. In the receiver, the decoding of the predetermined sequence is performed by a decoder.
    Type: Grant
    Filed: May 24, 1999
    Date of Patent: June 3, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Constant P. M. J. Baggen, Arie G. C. Koppelaar, Ewa B. Hekstra
  • Transmission system with adaptive channel encoder and decoder
    Patent number: 6543025
    Abstract: In a transmission system comprising a transmitter coupled via a transmission channel to a receiver. The transmitter comprises a channel encoder for deriving encoded symbols from source symbols. The receiver comprises a channel decoder for reconstructing the source symbols from the signal received from the transmission channel. According to the present invention, the transmitter comprises a separate encoder for coding and transmitting a coding property used in the channel encoder to the receiver. The receiver is arranged for receiving the encoded coding property from the transmission medium, and the separate channel decoder is arranged for decoding the encoded coding property. The coding property provided by the separate channel decoder is passed to a code property setting component in the channel decoder for setting the coding property of the channel decoder.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: April 1, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Ewa B. Hekstra
  • Transmission system with adaptive channel encoder and decoder
    Publication number: 20020120904
    Abstract: In a transmission system comprising a transmitter (4) coupled via a transmission channel (10) to a receiver (6). The transmitter (4) comprises a channel encoder (14) for deriving encoded symbols from source symbols. The receiver (6) comprises a channel decoder (28) for reconstructing the source symbols from the signal received from the transmission channel (10).
    Type: Application
    Filed: February 28, 2002
    Publication date: August 29, 2002
    Applicant: U.S. PHILIPS CORPORATION
    Inventor: Ewa B. Hekstra
  • Transmission system with adaptive channel encoder and decoder
    Patent number: 6363513
    Abstract: In a transmission system comprising a transmitter coupled via a transmission channel to a receiver. The transmitter comprises a channel encoder for deriving encoded symbols from source symbols. The receiver comprises a channel decoder for reconstructing the source symbols from the signal received from the transmission channel. According to the present invention, the transmitter comprises a separate encoder for coding and transmitting a coding property used in the channel encoder to the receiver. The receiver is arranged for receiving the encoded coding property from the transmission medium, and the separate channel decoder is arranged for decoding the encoded coding property. The coding property provided by the separate channel decoder is passed to a code property setting component in the channel decoder for setting the coding property of the channel decoder.
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: March 26, 2002
    Assignee: U.S. Philips Corporation
    Inventor: Ewa B. Hekstra