Abstract: A collection of samples Si, representing, for example, an image is filtered in the following manner. A distinction is made between valid samples Si+ and non-valid samples Si? on the basis of auxiliary data AUX. Filtered samples So, which are associated with the valid samples Si+, are derived exclusively on the basis of the valid samples Si+. Accordingly, it is prevented that the filtered samples, which are associated with the valid samples, are mixtures of valid and non-valid samples. Such mixtures cause distortion, in particular if the valid and non-valid samples substantially differ in value.

Abstract: Levorotatory and dextrorotatory enantiomers of 1-[(4-chlorophenyl)phenylmethyl]-4-[(4-methylphenyl)sulfonyl]piperazine of the formula 1

Abstract: Levorotatory and dextrorotatory enantiomers of 1-[(4-chlorophenyl)phenylmethyl]-4-[(4-methylphenyl)sulfonyl]piperazine of the formula 1

Abstract: Levorotatory and dextrorotatory enantiomers of 1-[(4-chlorophenyl)phenylmethyl]-4-[(4-methylphenyl)sulfonyl]piperazine of the formula 1

Abstract: Video encoding with half-pixel motion estimation is an example of a data processing in which the degree of resemblance between a data sample [X] and interpolations [I] between another data sample [C] and further data samples [B] is determined for each interpolation [I]. The interpolations [I] are the sum of the other data sample [C] multiplied by a first weighting factor [W1] and a further data sample [B] multiplied by a second weighting factor [W2], expressed in a formula: I=C×W1+B×W2.

Abstract: Levorotatory and dextrorotatory enantiomers of 1-[(4-chlorophenyl)phenylmethyl]-4-[(4-methylphenyl)sulfonyl]piperazine of the formula 1

Abstract: In the Improved PB-frames mode, one of the options of the H.263+ Recommendation, a macroblock of a B-frame may be encoded according to a forward, a backward or a bidirectional prediction mode. The invention relates to a method of encoding a sequence of pictures defining a strategy for the choice of a prediction mode among the three possible ones in the encoding of B-macroblock. This strategy is based upon SAD(Sum of Absolute Difference) calculations and motion vectors coherence and allows to use backward prediction when scene cuts occur. In the proposed strategy, the SAD of the bidirectional prediction is not necessarily derived when the motion is non linear allowing less calculation and reduction in CPU burden. The invention also relates to an encoding system for carrying out said method and including a computer-readable medium storing instructions that allow the implementation of this method.

Abstract: Levorotatory and dextrorotatory enantiomers of 1-[(4-chlorophenyl)phenylmethyl]-4-[(4-methylphenyl)sulfonyl]piperazine of the formula 1

Abstract: Levorotatory and dextrorotatory enantiomers of 1-[(4-chlorophenyl)phenylmethyl)-4-](4-methylphenyl)sulfonyl]piperazine of the formula 1

Abstract: The present invention relates to a method of copying compressed digital data onto an information medium. Said digital data have been compressed by successive fragments according to a scalable compression format, and a fragment according to said format comprises a base layer and at least one improvement layer. The copying method according to the invention comprises a step of eliminating part of the at least one improvement layer. It next comprises a step of copying the improvement layer thus truncated onto a destination information medium. These steps are iterated for all or some of the fragments constituting the digital multimedia signal.

Abstract: The present invention relates to a filter circuit for a set of original data (X0-X7) able to implement in series the steps of discrete transformation (DCT2), correction (ZER) of odd transformed data and inverse discrete transformation (IDCT2). The filter circuit takes advantage of the fact that the paths corresponding to the even and odd transformed data are completely separate with the exception of a first processing stage (ST1) of the discrete transformation and a last processing stage (ST8) of the inverse discrete transformation in order to connect a first half of the data issuing from the first stage to the last processing stage. The implementation of the filter circuit is thus simplified, both making said circuit less expensive and giving it a lower power consumption. For optimized implementation, the filter circuit functions in differential mode.

Abstract: A security method uses a single stored object as both an MPEG4 object for video compression, and for user identification and security. An authorized user video image is digitized to create corresponding authorized user identity data, which is stored as pixel data. A method is provided using the authorized user video image as a reference image for compression techniques. A stored image difference threshold level, defines the required degree of image match necessary. A present user video image is received, and digitized to create corresponding present user identity data. Image differences, between the present user video image and the authorized user video image are determined and compared to the image difference threshold level to determine whether to permit device usage. In one embodiment, video images are stored in MPEG4 format. The protected device is disabled when differences between a present user video image and an authorized user video image exceed threshold level.

Abstract: The present invention relates to a device for graphically processing video objects containing texture data, said device comprising a filtering circuit (11) for subsampling a video object, and a video object composition unit (13) for applying texture data of the video object to a graphical form via a geometric transformation. The video object composition unit calculates a subsampling factor using parameters of the geometric transformation, said subsampling factor then being used by the filtering circuit to subsample the video object. The video object composition unit then applies the subsampled video object to the graphical shape with a view to displaying a visual scene on the screen.

Abstract: In the Improved PB-frames mode, one of the options of the H.263+ Recommendation, a macroblock of a B-frame may be encoded according to a forward, a backward or a bidirectional prediction mode. The invention relates to a method of encoding a sequence of pictures defining a strategy for the choice of a prediction mode among the three possible ones in the encoding of B-macroblock. This strategy is based upon SAD(Sum of Absolute Difference) calculations and motion vectors coherence and allows to use backward prediction when scene cuts occur. The calculations are here performed on original pictures allowing less calculation and reduction in CPU burden. The invention also relates to an encoding system for carrying out said method and including a computer-readable medium storing instructions that allow the implementation of this method.

Abstract: Levorotatory and dextrorotatory enantiomers of 1-[(4-chlorophenyl)phenylmethyl]-4-[(4-methylphenyl)sulfonyl]piperazine of the formula their preparation and use for the preparation of substantially optically pure enantiomers of 1-[(4-chlorophenyl)phenylmethyl]piperazine, which are themselves valuable intermediate products for the preparation of optically active therapeutic compounds having a very high degree of optical purity.

Abstract: A set of image samples [IS] is established from a set of image sample values [SV] and geometrical parameters [V1, V2, V3] in the following manner. In an initialization step [INIT], a mask [MSK] is generated from the geometrical parameters [V1, V2, V3]. In a mapping step [MAP], the set of image sample values [SV] is mapped on the set of image samples [IS]. The mask [MSK] intervenes in this mapping.

Abstract: The composition of an image [IM] comprises the step of mapping [MAP] a set of image sample values [SV] from a departure space [DEP] to an arrival space [ARR] in accordance with a geometrical transformation [T]. A zone in the departure space [ITL] is computed by applying the inverse geometrical transformation [T−1] to a zone in the arrival space [TL] covering a group of image samples. A group of input values [IV] is established for the zone in the departure space [ITL]. The group of input values [IV] comprises Boolean values [BV]. A Boolean input value has a certain position (xd, yd) in the departure space and designates the other input values having the same position as being non-valid if the position is outside the set of image sample values [SV]. The group of image samples [TL] is composed from the group of input values [IV].

Abstract: During the transformation of data, for example the decoding of encoded and transformed data, there is front-end processing (FE) to generate a data block for subsequent back-end processing (TR), this front-end processing may include run-length decoding (RLD). Auxiliary data (AUX) indicating the structure of the data block (MB) is also generated during the front-end processing. Typically, the auxiliary data is indicative of the location of zero coefficients within the data block. The implementation of the back-end processing (TR) is adapted to the structure of the data block (MB) based upon the content of the auxiliary data (AUX), thereby making the implementation more efficient. For example, the content of the auxiliary data can determine which shortcuts can be applied during the implementation of an inverse discrete cosine transformation.

Abstract: A data processing arrangement comprises an input circuit [INP], an interconnection network [ICN] and a data processing circuit [PRC]. The input circuit [INP] forms successive groups of data [GRP] and, moreover, generates a basic control data item [BCD] and an additional control data item [SCD] for each group of data [GRP]. A basic control data item [BCD] indicates for each data item one of a plurality of terminals [1-4] to which the data item should be applied. An additional control data item [SCD] indicates for each data item if this data item is valid [+] or not valid [−]. The interconnection network [ICN] applies the successive groups of data to the terminals [1-4] in dependence on the basic control data item [BCD] and on the additional control data item [SCD].

Abstract: A device supplies an output value Y in response to an input value X in accordance with a given function F. The function F can be, for example, a gamma correction function for a video signal. The device operates as follows. An input section (INP) derives a table input value (XT) and an interpolator input value (XI) from the input value (X). A table (TBL) supplies a table value (YT) in response to the table input value (XT). An interpolator (INT) supplies an interpolation value (YI) in response to the interpolator input value (YI). An output section (OUT) combines the table value (YT) and the interpolation value (YI) so as to obtain the output value (Y).