Patents by Inventor George R. Tomasevich

George R. Tomasevich 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).

  • Patent number: 4774496
    Abstract: Recovery from transmission errors is facilitated by initializing state variables to prescribed values in both a digital encoder used in transmitting a signal and a corresponding digital decoder used in receiving the signal when the transmission channel becomes inactive. Additionally, the values of the encoder and decoder state variables are held constant for up to a prescribed interval upon the transmission channel becoming inactive. The state variables are held constant until either the prescribed holding interval elapses or the transmission channel becomes active. If the prescribed holding interval elapses before the transmission channel becomes active the state variables are initialized to the prescribed values. However, if the encoder or decoder transmission channel becomes active before the prescribed holding interval has elapsed, the encoder or decoder, respectively, returns to its normal operative state and the state variables are allowed to adapt.
    Type: Grant
    Filed: February 28, 1986
    Date of Patent: September 27, 1988
    Assignee: American Telephone and Telegraph Company, AT&T Bell Laboratories
    Inventor: George R. Tomasevich
  • Patent number: 4726019
    Abstract: In a speech signal being reconstructed from digital samples, artificial gaps caused by discarded late packets are minimized by holding state varibales constant in a decoder used to reconstruct the speech signal. The decoder state variables are held constant from the end of the last previous packet information field for up to a prescribed interval. Upon arrival of the "late" packet, the decoder passes from the hold variables state to its normal operating state and reading out of samples from the packet information field is initiated immediately. Subsequent packets in the information spurt are concatenated to the late arriving packet.
    Type: Grant
    Filed: February 28, 1986
    Date of Patent: February 16, 1988
    Assignee: American Telephone and Telegraph Company, AT&T Bell Laboratories
    Inventors: Harry W. Adelmann, George R. Tomasevich