Abstract: Aspects of the present disclosure relate to image data verification. In examples, a discrete cosine transform (DCT) is performed on image data and used to generate a set of DCT coefficients. In some instances, multiple block sizes are used when processing the image data, such that a set of DCT coefficients is generated for each block size. The resulting sets of DCT coefficients for the plurality of block sizes may be processed according to an expected distribution to determine whether the content of the image data is likely to be authentic or likely to be altered, such that an indication may be provided in association with the image data accordingly.

Abstract: A radio frequency generating system comprises a synchronization board that receives an external clock signal from a clock source and generates multiple copies of the external clock signal. Each of a plurality of signal generation board receives a copy of the external clock signal from the synchronization board. Each signal generation board comprises a plurality of direct digital synthesizers that are synchronized using the external clock signal.

Abstract: A radio frequency generating system comprises a synchronization board that receives an external clock signal from a clock source and generates multiple copies of the external clock signal. Each of a plurality of signal generation board receives a copy of the external clock signal from the synchronization board. Each signal generation board comprises a plurality of direct digital synthesizers that are synchronized using the external clock signal.