Patents by Inventor Subhash Chandra Kak

Subhash Chandra Kak 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).

  • Uniform permutation privacy system
    Patent number: 4100374
    Abstract: A privacy communication arrangement temporally rearranges an intelligence signal to produce an uncorrelated scrambled signal. The intelligence signal is sampled at a predetermined rate and the samples are divided into groups of N successive samples. Each N successive sample group is uniformly permuted by transposing the i.sup.th sample (i = 1, 2, . . . , N) to the K.sub.1 i.sup.th (modulo N) sample position, where K.sub.1 is an integer prime with respect to N. The uniformly permuted group is transformed into the N successive sample group by transposing the j.sup.th sample of the permuted group to the K.sub.2 j.sup.th (modulo N) sample position.
    Type: Grant
    Filed: April 11, 1977
    Date of Patent: July 11, 1978
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Nuggehally Sampath Jayant, Subhash Chandra Kak