Abstract: A method for encoding first and second data words, which may represent differential data values (e.g., luminance and chrominance difference data values), onto an encoded data word includes determining a first approximation value, to which a first code word is assigned, for a first data value, and determining a second approximation value, to which a second code word is assigned, for a second data value; mapping the first and second code words onto first and second data segments, respectively, of the encoded data word; determining a first difference value between the first data value and the first approximation value and determining a second difference value between the second data value and the second approximation value; and at least partial mapping of a first difference data word representing the first difference value and/or a second difference data word representing the second difference value onto at least one additional data segment of the encoded data word.

Abstract: In a method and device for determining motion vectors that are each coordinated with individual regions of an image, the image is divided into a number of first main blocks, making use of a first block raster, and a first estimation process is performed to provide each first block with a motion vector. The image is also divided into a number of second main blocks, making use of a second block raster, whose position is displaced relative to or offset from the first block raster, for example in the horizontal and vertical directions, and a second estimation process is performed to provide each second main block with a motion vector. A number of subblocks are formed, each subblock being formed by an overlap region between one of the main blocks of the first raster and certain ones of the second main blocks of the second raster. A motion vector for each subblock is generated, this motion vector depending on the motion vectors of the main blocks and being coordinated with the particular subblock.

Abstract: The invention relates to a method and a device for interpolating a pixel of an interline of a first field in a sequence of interlaced fields. The method comprises selecting at least one first pixel and one second pixel each from scan lines of the first field adjacent to the interline, and a third pixel from a second field temporally preceding or following the first field, the image position of this pixel corresponding to the image position of the pixel to be interpolated, as well as fourth and fifth pixels which lie vertically adjacent to the third pixel in the second field; generating a first filter value by applying a first filter, which comprises a low-pass filter, to the at least one first and second image information values; generating a second filter value by applying a second filter, which comprises a high-pass filter, to the third, fourth and fifth image information values; generating an image information value of the interpolated pixel by employing the first and second filter values.

Abstract: The present invention relates to a method and a device for filtering of a method* in which the following steps are carried out: a) furnishing a first signal value S1†, a second signal value and a third signal value, b) determining an interval dictated by the at least one second signal value and the at least one third signal value, with a first interval boundary depending on the at least one second signal value and a second interval boundary dictated by the at least one third signal value, c) determining a mean value from the at least one selected second signal value and the at least one selected third signal value, d) determining whether the first signal value lies within the interval, e) if the first signal value lies outside the interval: determining a first mathematical distance between the first signal value and the first interval boundary and a second mathematical distance between the first signal value and the second interval boundary and a third mathematical distance between‡ between the first sign

Abstract: A method and a circuit arrangement for picture-in-picture insertion are described, in which, in order to prevent a write operation from being overtaken by a read operation and also to avoid the associated picture disturbances, a field is stored under an address which precedes a previous field by a number of N lines. A read address is then shifted to the same line of the older field in the event of a minimum distance to a write address being undershot.

Abstract: A method for picture-in-picture insertion is described, which is distinguished in particular by the fact that the inset pictures are written to a memory device (2) in a circulating manner under continuously incremented write addresses, the first and last address of each written-in inset picture is stored, an overtake signal is formed by comparing the instantaneous address with the previously stored address, said signal indicating whether a previous address has been reached again and, consequently, the corresponding picture content has been overwritten, by evaluation of the overtake signal, the current or preceding segment is selected for read-out depending on whether or not overtaking took place before the start of the read-out, and the inset picture stored in the selected segment is read out with continuously incremented read addresses and is inserted into the main picture. A corresponding circuit arrangement is also described.

Abstract: The invention relates to a method and a device for determining the spacing between a first sequence of signal values and a second sequence of signal values, wherein a third signal value of the second sequence lying temporally or spatially between the first and second signal values is assigned to one first signal value and second signal value each of the first sequence, which values follow each other in succession, wherein the method comprises the determination of at least one first spacing value based on the following method steps: a) determining a mixing value from the first and second signal values by weighting these signal values; b) determining a mathematical spacing between the mixing value and the third signal value in order to provide a second spacing value; c) determining an interval width value which is dependent on the interval width of an interval defined by the first and second signal values; d) mapping the first spacing value onto the second spacing value using the interval width value as the map

Abstract: Method for motion-vector-aided interpolation of a pixel of an intermediate image lying between two input images includes a first pixel being selected from a first field and a second pixel being selected from a second field using a first motion vector, and a third pixel being selected from the first field and a fourth pixel being selected from the second field using a second motion vector. Next, an interval specified by video information values of the first pixel and the second pixel or an interval specified by video information values of the third pixel and the fourth pixel is determined and the video information values are mixed such that the video information value of the pixel to be interpolated lies within this interval.

Abstract: The invention relates to a method for motion-vector-aided interpolation of a pixel in an intermediate image lying temporally or spatially between first and second images, a first pixel and at least one first further pixel in the first image and a second pixel and at least one second further pixel in the second image being selected on the basis of first and second motion vectors, to each of which there are assigned video information values, an interpolated video information value being chosen in such fashion that it lies inside an interval given by the first and second video information values, account being taken of the distance from a third video information value, determined by mixing the first and second further video information values, to the interval boundaries.

Abstract: The invention relates to a method for interpolating a pixel from an intermediate line of a first field of a sequence of interlaced fields.

Abstract: Method for motion-vector-aided interpolation of a pixel of an intermediate image lying between two input images includes a first pixel being selected from a first field and a second pixel being selected from a second field using a first motion vector, and a third pixel being selected from the first field and a fourth pixel being selected from the second field using a second motion vector. Next, an interval specified by video information values of the first pixel and the second pixel or an interval specified by video information values of the third pixel and the fourth pixel is determined and the video information values are mixed such that the video information value of the pixel to be interpolated lies within this interval.

Abstract: The present invention relates to interpolating a pixel in an image that includes a number of pixels arrayed in matrix-like fashion, to each of which a video information value is assigned, in which method a gradient for the video information value is determined at, at least, a first and a second pixel adjacent to the pixel to be interpolated and, in the formation of the interpolated video information value, a greater weight is accorded to the video information value of the adjacent pixels whose associated gradient is smaller.

Abstract: A time-discrete picture signal is formed from an analog picture signal, such as a luminance signal or a chrominance signal. Corresponding to the time-discrete picture signal, a time-discrete filter signal is formed, specifically a so-called “peaking signal,” which has a sequence of peaking signal values, of which one value each is associated with one signal value of the time-discrete picture signal. The discrete peaking signal is formed by a digital peaking filter from the discrete picture signal or by an analog peaking filter from the analog picture signal during subsequent sampling of the analog peaking signal. The peaking filter increases the amplitude of selected frequency components of the picture signal.

Abstract: The invention relates to a method and a device [to display]* at least two overlapping images (M, S) within one combined picture (G), wherein a third video signal (VMS) is generated from a first video signal (VM) containing the video information for a first image (M) displayed in a first active region (A1), and from a second video signal (VS) containing the video information for a second image (S) displayed in a second active region (A2), the third video signal containing video information for an image displayed within an overlap region (A12) of the first and second regions (A1, A2). Missing words supplied by translator.

Abstract: The invention relates to the phase correction of a vertically distorted digital picture, which is divided into two half pictures in accordance with the interlaced scanning method. To take into account a vertical decimation factor (vscale), which changes in the vertical direction of the digital picture, it is proposed that a phase correction (vphscor) be generated for the second half picture as a function of the particular vertical position in the second half picture. This phase correction must be considered in generating the second half picture. It is derived directly from information (vinc) about the change of the vertical decimation factor.

Abstract: To determine the noise contained in a picture, it is proposed first to determine homogeneous picture regions of the picture (100-102) and then to measure the high-frequency signal component in these homogeneous picture regions (BR). The measurement of the high-frequency signal components is here averaged over many measurement points, i.e. over many homogenous picture regions (BR), and is processed into a noise figure (NOISE_SUM) (103-104). In this way, the quality of the picture can be measured directly in the picture content.