Zoran (france)

Zoran Corporation

Joan Bruna

Stephane Mallat

Christophe Bernard

Stéphane Mallat

Nicolas Laveau

Video processing method and means for enhancing a video stream, by computing transform coefficients using a spatio-temporal transform comprising a spatial subband transform and a causal time wavelet transform performing filterings with multiscale causal wavelets, modifying the transform coefficients with a nonlinear processing, and computing a processed video stream from the modified transform coefficients using a spatio-temporal reconstruction transform comprising an inverse subband transform and a short delay inverse time wavelet transform, where the short delay inverse time wavelet transform is implemented with wavelet filters modified with window functions to control the processing delay of the entire video processing method.

Method and apparatus for spatio-temporal subband video enhancement with small time delay

A method and apparatus for scaling video images, which applies more particularly to techniques for converting video sequence formats and deinterlacing. The invention comprises a parameterized interpolation () which computes interpolations at each new point of the output. An insensitive interval estimation () computes an interval where the probability distribution of the output image value is estimated to have its maximum, and an insensitive loss calculation () derives for each interpolation value a negative log likelihood measurement from an interval-insensitive probability distribution. After a spatial regularization () the invention includes a minimum loss selection () which selects the minimum loss interpolation at each new point and provides it as an output image value. The invention also includes a total variation increment module and a directional matching error module that can penalize the insensitive loss, for the minimum loss selection.

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Paris, France

Joan Bruna