Terho Kaikuranta

Mobile station with audio signal adaptation to hearing characteristics of the user

A method and apparatus for increasing the intelligibility of speech signals received by mobile stations via adapting some of the acoustic parameters of speech in the frequency domain. The mobile station may have the capability to modify speech signal parameters to conform the speech signal to a listeners hearing profile. In an alternative embodiment, mobile station processing and battery power are conserved by the communication network having the capability to modify speech signal parameters to conform the speech signal to a listeners hearing profile. To conserve mobile station memory, the users hearing profile may be stored on the network.

Deterministic diffractive diffusers for displays

A LCD backlighting device that uses a diffractive light extractor has been developed for applications in which pointlike light sources are employed. The novel system eliminates the images of light sources, which appear as bright lines emanating from each source in the conventional diffractive approach. In addition, the system illuminates the LCD uniformly: Modulation of the diffractive structure as a function of position is used to control the output field of this extended planar light source.