Abstract: In a method for operating a hybrid vehicle, a total wheel drive torque is composed of a wheel drive torque of an internal combustion engine of the vehicle and a wheel drive torque of an electric machine of the vehicle, and the total wheel drive torque is selectively increased or decreased by the wheel drive torque of the electric machine in one of a motor mode or a generator mode of the electric machine. The electric machine is operated such that (i) the sum of the wheel drive torques of the electric machine and a wheel-drive-torque-reducing safety measure carried out remains constant in the generator mode, or (ii) the sum of the wheel drive torques of the electric machine and a wheel drive torque-increasing safety measure carried out remains constant in the motor mode.

Abstract: In a method for operating a hybrid vehicle, a total wheel drive torque is composed of a wheel drive torque of an internal combustion engine of the vehicle and a wheel drive torque of an electric machine of the vehicle, and the total wheel drive torque is selectively increased or decreased by the wheel drive torque of the electric machine in one of a motor mode or a generator mode of the electric machine. The electric machine is operated such that (i) the sum of the wheel drive torques of the electric machine and a wheel-drive-torque-reducing safety measure carried out remains constant in the generator mode, or (ii) the sum of the wheel drive torques of the electric machine and a wheel drive torque-increasing safety measure carried out remains constant in the motor mode.

Abstract: The invention relates to a video processing method provided for processing an input image sequence consisting of successive frames and comprising for each successive frame the steps of (a) preprocessing each successive current frame by means of a first sub-step of computing for each frame a so-called content change strength (CCS) and a second sub-step of defining from the successive frames and said CCS the structure of the successive frames to be processed, and (b) processing said preprocessed frames. The frames are possibly, or preferably, subdivided into sub-structures such as blocks, segments or objects of any kind of shape. This method may be applied to the implementation of a video encoding method, for instance in video content analysis systems.

Abstract: The invention relates to a video encoding method provided for encoding each frame of a sequence of successive groups of frames. This method comprises for each successive current frame, itself subdivided into blocks, the steps of estimating a motion vector for each block, generating a predicted frame from these motion vectors, applying to a difference signal between the current frame and the last predicted frame a transformation and quantization sub-step, and coding the quantized coefficients thus obtained. A preprocessing step, applied to each successive current frame, computes for said frame a so-called content-change strength (CCS), used to define a modified structure of the successive groups of frames to be encoded.

Abstract: The invention relates to a video encoding method provided for encoding an input image sequence consisting of successive groups of frames in which each frame is itself subdivided into blocks, and to a corresponding video encoding device. This method and device perform the steps of preprocessing the sequence on the basis of a so-called content-change strength (CCS) computed for each frame, generating a predicted frame using motion vectors estimated for each block, applying to a difference signal between the current frame and the last predicted frame a transformation sub-step producing a plurality of coefficients and followed by a quantization sub-step of said coefficients, and coding said quantized coefficients. According to the invention, the CCS is used in the quantization sub-step for modifying the quantization factor used in this sub-step, the CCS and the quantization factor increasing or decreasing simultaneously.