Zoran (france) S.a.

Mark Shand

Joan Bruna Estrach

Guillaume Etorre

An input stereoscopic video signal has a first frame sequence (S) in a left-eye channel and a second frame sequence (S) in a right-eye channel, the second frame sequence (S) having a zero or non-zero time offset &#x3c4;with respect to the first frame sequence (S). It is converted into an output stereoscopic video signal having a third frame sequence (S') in the left-eye channel and a fourth frame sequence (S&#x2032;) in the right-eye channel. The fourth frame sequence (S&#x2032;) has a zero or non-zero time offset &#x3c4;with respect to the third left-eye frame sequence (S&#x2032;). The two time offsets &#x3c4;may be different &#x3c4;), in which case the conversion comprises a time interpolation of the frames of at least one of the first and second frame sequences with interpolation parameters selected to apply a relative time shift of &#x3c4;to the right-eye channel with respect to the left-eye channel.

Stereoscopic video signal processor with enhanced 3D effect

For compressing a video signal, a local multiscale transform is applied to a frame of the video signal to obtain coefficient blocks. The coefficients of each block are distributed into coefficient groups associated with that block. A plurality of the coefficient groups associated with a block are processed. The processing of one of the groups comprises determining an exponent for encoding the coefficients of that group. Mantissas are determined for quantizing the coefficients of the plurality of groups in combination with the exponents respectively determined for these groups. Coding data including each exponent determined for a coefficient group and the mantissas quantizing the coefficients of the group in combination with this exponent are stored in an external frame buffer. The mantissas determined for quantizing the coefficients of one of the groups are represented in the coding data by a respective number of bits depending on the exponents determined for the plurality of coefficient groups.

Frame buffer compression for video processing devices

In a method of analyzing an input video sequence, pixels of synthesized images of an output video sequence are associated with respective directions of regularity belonging to a predefined set of directions. A first subset of candidate directions is determined from the predefined set of directions for a region of a first image of the output sequence. For a corresponding region of a second synthesized image of the output sequence following the first image, a second subset of candidate directions is determined from the predefined set of directions, based on images of the input sequence and the first subset of candidate directions. The directions of regularity for pixels of this region of the second synthesized image are detected from the second subset of candidate directions. The recursive determination of the subsets of candidate directions provides a sparse geometry for efficiently analyzing the video sequence. The method is well suited for super-resolution video applications such as deinterlacing, frame rate conversion and noise reduction.

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Dampierre en Yvelines, France

Mark Shand