Abstract:
A method for high-resolution spectral analysis in multi-channel observations is disclosed with which it is possible to detect ventricular late potentials in individual heartbeats. The method also offers the basis for the spatial localization of pathological tissue modification that has a cause-and-effect relationship to the creation of these late potentials. The applicability of the method of the invention can be similarly applied to problems in radar or sonar technology, astronomy, measuring mobile radio telephone channels or to other problems of seismic or medical signal processing.
Abstract:
To compensate for quasi-periodic disturbances in measurement signals, the wanted signal is separated from the disturbing signal by determining from an auxiliary signal a series of trigger instants, and estimating from this measurement signal a disturbing signal template, by furthermore generating from this disturbing signal template a trigger-synchronous reference signal, and by using this trigger-synchronous reference signal for filtering the measurement signal. The process can be carried out both after the recording of a complete measurement data set and at the same time as the recording of such a measurement data set. The process is suitable in particular for compensating for cardio-interference during magneto-encephalography.
Abstract:
An arrangement for optimized weighting of transmitted transformation coefficients in transformation coders for the purpose of minimizing convolution distortions in the transformation coding of image signals for the purpose of a data reduction and/or for the purpose of achieving a prescribed channel rate, has weighting circuitry whereby coefficients to be transmitted are additionally subjected to a weighting or windowing; and the selection of suitable weighting factors which effect a minimization of the convolution distortions in the reconstructed image is executed, dependent on the plurality of coefficients to be transmitted.
Abstract:
A process is stated with which ADALINE-type neural networks whose inputs are Boolean variables can be realized using Boolean functions. In addition, a purely digital circuit arrangement for realizing ADALINE-type neural networks is stated. The digital circuit arrangement can be constructed with the aid of a digital base circuit. The digital base circuit generates the set of Boolean functions which replaces a neuron for any value of its input weighting factors. A process for training the circuit arrangement is stated. It is thus possible to realize and to train ADALINE-type neural networks entirely with the aid of purely digital circuit arrangements.
Abstract:
A method for scene-model-assisted reduction of image data for digital television signals, whereby a picture signal supplied at time t is to be coded, whereby a predecessor frame from a scene already coded at time t-1 is present in an image store as a reference, and whereby the frame-to-frame information are composed of an amplification factor, of a shift factor and of an adaptatively acquired quad-tree division structure, and it is provided that, upon initialization of the system, a uniform, prescribed gray scale value or picture half-tone expressed as a defined luminance value is written into the image store of a coder at the transmitter and in the image store of a decoder at the receiver store, and are in the same way for all picture elements (pixels), and both the image store in the coder as well as the image store in the decoder are each operated with feed back to themselves in a manner such that the content of the image store in the coder and decoder can be read out in blocks of variable size, and can be amplified with a factor greater than or less than 1 of the luminance and can be written back into the image store with shifted addresses, whereby the blocks of variable size are organized according to a known quad-tree data structure.
Abstract translation:一种用于数字电视信号的场景模型辅助减少图像数据的方法,由此在时间t提供的图像信号被编码,从而在时间t-1已经编码的场景的前导帧存在于图像存储器中 作为参考,由此帧到帧信息由移位因子和适应性获取的四叉树分割结构的放大因子组成,并且在系统初始化时, 以规定的亮度值表示的规定的灰度值或图像半色调被写入在发送器处的编码器的图像存储器中以及在接收器存储器处的解码器的图像存储器中,并且对于所有图像元素都是相同的方式 (像素),并且编码器中的图像存储以及解码器中的图像存储都以使得可以在编码器和解码器中存储的图像的内容可以被读出的方式以对其自身进行反馈的方式进行操作 v 并且可以以大于或小于亮度的1的因子进行放大,并且可以用移位的地址将其写回到图像存储器中,由此根据已知的四叉树数据结构来组织可变大小的块。