satellite audio-video scrambling system comprising scramblers and descramblers for applying security measures to prevent unauthorized use of audio and video images and signals

'appli':12 'audio':3,20 'audio-video':2 'compris':7 'descrambl':10 'imag':23 'measur':14 'prevent':16 'satellit':1 'scrambl':5 'scrambler':8 'secur':13 'signal':25 'system':6 'unauthor':17 'use':18 'video':4,22

transmission of scrambled audio-video signals via satellite

'audio':5 'audio-video':4 'satellit':9 'scrambl':3 'signal':7 'transmiss':1 'via':8 'video':6

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