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DTX

Reverse-Engineering Standards Technology DTX, FEC, Opus, redundancy, SDP, VAD

RED: Improving Audio Quality with Redundancy

Back in April 2020 a Citizenlab reported on Zoom’s rather weak encryption and stated that Zoom uses the SILK codec for audio. Sadly, the article did not contain the raw data to validate that and let me look at it further. Thankfully Natalie Silvanovich from Googles Project Zero helped me out using the Frida tracing […]

Philipp Hancke · August 20, 2020

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