Abstract: In a system for generating a compatible television signal with a "letterbox" display format, groups of vertically arranged picture elements (pels) are subjected to vertical DCT transformation producing eight DCT coefficients. Intermediate sixth and seventh coefficients are placed in the letterbox bar regions. The remaining six coefficients, namely the first through fifth coefficients and the highest frequency eighth coefficient, are inverse DCT transformed and processed with the main image information. A standard aspect ratio receiver displays a letterbox image using only the remaining six coefficients. A wide aspect ratio receiver uses the six remaining coefficients with the two coefficients from the bar regions, after inverse DCT, to produce a full resolution wide aspect ratio image.

Abstract: A method of signal processing batch-bulk coded digital signals which are segmented into variable-length words and the variable-length words are allocated to constant-length blocks. The constant-length blocks which receive a variable-length word having a word length which is shorter than a predetermined word length are filled up with portions of variable-length words having a word length longer than the predetermined word length. Several successive constant-length blocks are combined into superblocks, and one address word which identifies the superblock location is added at one end of each superblock. The sum of the variable-length words within each superblock is smaller than, or equal to, the sum of the constant-length blocks within the superblock.

Abstract: Video signal information derived from a high definition source is conveyed via two channels. A first channel conveys relatively low spatial resolution, high temporal resolution video information compatible with a standard television receiver. An auxiliary second channel conveys relatively high spatial resolution, low temporal resolution video information. A high definition television receiver reconstructs original high definition information from the first and second channel information.

Abstract: A video signal processor as for generating a picture-in-picture signal, generates respective analog luminance components and first and second analog chrominance components. In order to reduce the system hardware and processing speed, multiplexing circuitry subsamples the luminance and chrominance components on a field basis to provide alternating fields of only luminance and only chrominance signal. The multiplexing circuitry further subsamples the chrominance components by providing groups of horizontal lines of only the first chrominance component alternating with groups of horizontal lines of only the second chrominance component.

Abstract: A device for transferring signals between itself and a record carrier tape, the device including a rotating head wheel disk, at least one head disposed on the rotating head wheel disk, a sensor and a signal emitter to indicate the position of the head wheel disk, the improvement wherein the signal emitter comprises two juxtaposed electrical conductors.

Abstract: A method and apparatus for the improvement of the resolution of digital signals. In digital TV signals which are transformed into a frequency domain, irregularities in the pattern of the reproduced video signals occur because of rounding off errors, when the number of bits per sample is reduced during calculation of the coefficients. This is remedied by increasing the coefficients of the transformed signal values following at least one first coefficient, for example a DC-coefficient, and reducing them again after inverse transformation. This is applicable to digital systems using block processing in which, because of a limited amount of bits, a rounding off of the transmitted spectral coefficients is performed in the calculation.

Abstract: A method for the transmission and/or recording and playback of digital data wherein the data are converted in sections to digital signals whose word length is a function of the information density of the data sections which reduces the susceptibility of the data to interference. In accordance with the method the digital signals obtained in sections are initially assigned to blocks having a constant word length, whereupon the blocks whose data sections have a smaller word length than the word length given by the blocks are filled with portions of data sections having a word length greater than the word length given by the blocks and finally the data sections are recombined from the blocks in their original word lengths.

Abstract: A noise reduction system with motion detection for digitalized video signals, the system including at least one memory, a filter, a correction circuit, and an adder and/or subtracter, wherein the correction circuit weights differences and/or sums of luminance and/or chrominance values with a factor k, and wherein the factor k has positive or negative values depending upon the difference in the signals.

Abstract: A television camera includes an acceleration correction device for correcting for sudden movements of the camera, to prevent blurring of the resulting television picture. The correction device changes the starting point on an image target depending upon the amount and direction of the acceleration. This correction does not occur until the acceleration exceeds a threshold value.

Abstract: A process for the digital transmission of video signals, wherein the signals to be transmitted are coded according to a variable codeword length code, and this code is adapted at time intervals, preferably at regular time intervals, to a statistic of the signals transmitted.

Abstract: A method for the transmission of a video signal, in which the analogue signal is converted into a digital signal and is digitally transmitted. However, before the transmission is transformed into the spectral domain, some portions of the digital signals are variously weighted on the basis of the physiological behavior of the eye. This weighting is performed by coding the signals to be transmitted in their representational accuracy.

Abstract: A method and circuitry for correcting discreet values transmitted in blocks. Circuitry performs at least one multiplication as of matrixes to obtain at least one product value having a plurality of digits, while limiting the number of digits. The correction value is then added to the product value. In the preferred embodiment, multiplication is of matrixes representing blocks of chromaticity or gray values by a transformation matrix and the multiplication produces matrixes in the frequency region. In this embodiment, only a single correction value is calculated, which is added to the mean value element of the matrix obtained by the multiplication and which corresponds to a multiple of the arithmetic mean of all of the elements of the image region matrix.

Abstract: A method for transmitting digital video signals wherein spectral values are sorted according to magnitude and leading zeros are suppressed. In this way, the average word per pixel length can be reduced to about 1 bit, with image quality remaining acceptable.