초록 ▼

A method and apparatus for representing a multi-dimensional, finite extent, information containing signal in a locally sensitive, frequency domain representation employs transforming the digital signal using a Short-Space Fourier transform having overlapping basis functions. The theory and applicati

A method and apparatus for representing a multi-dimensional, finite extent, information containing signal in a locally sensitive, frequency domain representation employs transforming the digital signal using a Short-Space Fourier transform having overlapping basis functions. The theory and application of the Short-Space Fourier transform provide, in one particular application of picture image transmission, an improved image quality over previously employed block transform coding methods and apparatus. A particularly preferred window function for use in connection with image signal processing is the multi-dimensional sinc function which has the unique advantage of a rectangular bandpass signal in the frequency domain.

대표청구항 ▼

A method for representing a pictorial image comprising the steps of generating a digital representation of said image, and transforming said digital representation of said image, using a Short-Space Fourier transform having overlapping basis functions for generating a compacted digital representatio

A method for representing a pictorial image comprising the steps of generating a digital representation of said image, and transforming said digital representation of said image, using a Short-Space Fourier transform having overlapping basis functions for generating a compacted digital representation of said image, wherein said compacted digital representation requires fewer bits of data than said digital representation for representing said image.