First Sentence:
The advent of video and the increase in both the number of homes with cable and the variety of cable channels has given rise to the concept of pay TV as an alternative to common on-the-air network programming.
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Key Phrases - Statistically Improbable Phrases (SIPs):
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horizontal synch signal, spin scrambling, vertical synch signal, partial response waveform, stereo audio samples, forming macroblocks, sampling clock signal, number generator seed value, scrambled video signal, complementary ramp, preoutput block, encoded video signal, permuted input block, referenced parent application, copy protection information, encoding apparatus, first storage device, color burst signal, scrambling transform, accordance with the present invention, synch intervals, synch separator, video inversion, descrambling equipment, presently preferred embodiment
Key Phrases - Capitalized Phrases (CAPs):
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United States, National Semiconductor, Data Encryption Standard, Top View Order Number, Package Number, Field of Search, Gernsback Publications, Oak Orion, Pix Color Sound, References Cited, Scientific Atlanta, Commercial Satellite Encryption Systems, Courtesy of Harris Semiconductor, Descrambling Techniques-Basic Video Circuitry, Digital Encryption Processor, High-Fidelity Stereo Audio, North Country Radio, Connection Diagrams Dual-In-Line Package, Data Bus, Date of Patent, Drawing Sheets, Los Angeles, Patent Jun, Patent Number
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