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1. (WO2017040305) SYSTEM AND METHOD FOR PREVENTING UNAUTHORIZED RECORDING, RETRANSMISSION AND MISUSE OF AUDIO AND VIDEO

Pub. No.:    WO/2017/040305    International Application No.:    PCT/US2016/049040
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Sat Aug 27 01:59:59 CEST 2016
IPC: G11B 20/00
H04H 60/18
H04K 1/02
Applicants: PEGASUS MEDIA SECURITY, LLC
Inventors: KLINE, Paul A.
KLINE, Gil
WEINSTEIN, Allan
WEINSTEIN, David J.
Title: SYSTEM AND METHOD FOR PREVENTING UNAUTHORIZED RECORDING, RETRANSMISSION AND MISUSE OF AUDIO AND VIDEO
Abstract:
In some embodiments, a method includes receiving, at a device, digital audio content to be converted by a digital-to-analog converter to produce analog audio content. The digital audio content has at least one audible frequency. The method also includes selecting, at the device, a first signal and a second signal to output with the analog audio content. The first signal has an inaudible carrier frequency and a bandwidth, and the second signal also has an inaudible carrier frequency and a bandwidth. A difference between the first signal and the second signal is an undesired audible signal. The method further includes outputting, from the device, the analog audio content, the first signal and the second signal, such that when the analog audio content is detected by a recording device the undesired audible signal is detected with the analog audio content.