SCRAMBLED TV SOUND SIGNALLING

SCRAMBLED TV SOUND SIGNALLING

An audio scrambler operates on segments of audio divided from a continuous audio signal to rotate head-to-tail the string of information contained in the segment by an amount which is at pseudo-random between the successive segments. When the segments are compressed to video format, the scrambled co...

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1. Verfasser: H.B. SHUTTERLY
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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creator H.B. SHUTTERLY
description An audio scrambler operates on segments of audio divided from a continuous audio signal to rotate head-to-tail the string of information contained in the segment by an amount which is at pseudo-random between the successive segments. When the segments are compressed to video format, the scrambled compressed audio signals are inserted into an unused line of the vertical blanking space of a television system for transmission with the video signals. The inserted audio is combined with decoy signals, also in the vertical blanking space to increase security of transmission. Concurrent scrambling of compressed audio signals and video signals is provided.
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
title SCRAMBLED TV SOUND SIGNALLING
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