Patents by Inventor Roar Hagen

Roar Hagen 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).

  • Speech coding including soft adaptability feature
    Patent number: 6058359
    Abstract: Adaptive speech coding includes receiving an original speech signal, performing on the original speech signal a current coding operation, and adapting the current coding operation in response to information used in the current coding operation. Adaptive speech decoding includes receiving coded information, performing a current decoding operation on the coded information, and adapting the current decoding operation in response to information used in the current decoding operation.
    Type: Grant
    Filed: March 4, 1998
    Date of Patent: May 2, 2000
    Assignee: Telefonaktiebolaget L M Ericsson
    Inventors: Roar Hagen, Erik Ekudden
  • Reducing sparseness in coded speech signals
    Patent number: 6029125
    Abstract: Sparseness is reduced in an input digital signal which includes a first sequence of sample values. An output digital signal is produced in response to the input digital signal. The output digital signal includes a second sequence of sample values, which second sequence of sample values has a greater density of non-zero sample values than the first sequence of sample values.
    Type: Grant
    Filed: July 7, 1998
    Date of Patent: February 22, 2000
    Assignee: Telefonaktiebolaget L M Ericsson, (publ)
    Inventors: Roar Hagen, Bjorn Stig Erik Johansson, Erik Ekudden, Willem Baastian Kleijn