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AssigneeU. S. Philips Corporation
InventorsMohammad R. Haghiri, Philippe Guntzburger, Marcel Le Queau
Estimating the term…
In a device for spatio-temporal sub-sampling of digital video signals representing a succession of interlaced or sequential images divided into blocks of m.times.n points (m and n being positive integers), the device comprising, in series, a circuit for the spatial prefiltering of the said sequence of fields, which circuit is intended to deliver a succession of sequential images which are limited with respect to the bandwidth, a spatial sub-sampling circuit, and a temporal sub-sampling circuit: a motion estimator which on the basis of, on the one hand, signals corresponding to the even fields and on the other hand, signals corresponding to the odd fields, delivers one or more information items on the motion in an odd field with respect to the which surround it.
A device for spatio-temporally sub-sampling digital video signals representing a succession of images divided into blocks of m.times.n points (m and n being positive integers), said device comprising:
In a system for the transmission of high-definition television images comprising a stage for the transmission of encoded information representing said images and, after transmission by means of a limited pass-band analogue channel involving processing to reduce the quantity of information to be transmitted, a stage for the reception of the transmitted information characterized in that it comprises, in its decoding part, a device for reconstructing images itself comprising, in series, a spatial postfiltering circuit intended to undertake a spatial interpolation in the sequential images transmitted by the analogue channel a stage for the compensation of movement, a switch intended to deliver a succession of sequential images, and a format-conversion circuit for the transformation of said succession of sequential images into a succession of interlaced images ready to be visually displayed, said stage for the compensation of movement itself comprising two image memories in series for the storage of the images successively transmitted by the analogue channel and post-filtered and an adder to form the semi-sum of said transmitted images, and said switch receiving alternately, at a first input, the output of the said stage for the compensation of movement and, at a second input, the output of the said spatial post-filtering circuit by means of a delay circuit providing a delay equal to an interlacing period.
In a system for the transmission of high-definition television images comprising a stage for the transmission of encoded information representing said images and, after transmission by means of a limited pass-band analogue channel involving processing to reduce the quantity of information to be transmitted, a stage for the reception of transmitted information characterized in that it comprises, in its decoding part, a device for reconstructing images itself comprising, in series, a spatial post-filtering circuit intended to undertake a spatial interpolation of the sequential image transmitted by the analogue channel, a stage for the compensation of movement, and a switch intended to deliver a succession of said sequential images ready to be visually displayed, said stage for the compensation of movement itself comprising two image memories in series for the storage of said sequential images transmitted by the analogue channel and post-filtered and an adder to form the semi-sum of said transmitted images, and said switch receiving alternately, at a first input, the output of said stage for the compensation of movement and, at a second input, the output of the said spatial post-filtering circuit by means of a delay circuit providing a delay equal to an interlacing period.
Dependencies are inferred from the claim text.