Patent ID: 9210457
Filing Date: 2015-12-08
Classification: H04N

Abstract:
1. A computer-implemented method, comprising: receiving, by a computing system, a data stream of encoded packetized content; identifying, by the computing system, a particular encoded packet of the data stream as having video content that requires electronic scrambling prior to export from the computing system to a different computing system; determining, by the computing system, a particular threshold value that defines allowable spatial frequencies of video content within the particular encoded packet, the threshold associated with the export of packetized content from the computing system to the different computing system; and applying a function to modify, by the computing system, discrete cosine transform (DCT) coefficients of the particular encoded packet that exhibit a matrix column or row index value greater than the particular threshold value to zero magnitude, and to modify DCT coefficients of the particular encoded packet that exhibit a matrix column or row index value less than the particular threshold value, and greater than a second threshold value that is different than the particular threshold value, to exhibit a finite magnitude less than a corresponding original magnitude, without completely decoding the particular encoded packet.