Scrambling
Scrambling – a) Usually used as a synonym for encryption, controlled disordering of a signal to prevent unauthorized reception. b) Sometimes used to describe controlled disorganization of a signal to improve its robustness. This form is more often called shuffling. c) To transpose or invert digital data according to a prearranged scheme in order to break up the low-frequency patterns associated with serial digital signals. d) The digital signal is shuffled to produce a better spectral distribution. e) The alteration of the characteristics of a video, audio, or coded data stream in order to prevent unauthorized reception of the information in a clear form. This alteration is a specified process under the control of a conditional access system.
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