waveform scrambling
1Olivia MFSK — Spectrogram (waterfall display) of an Olivia 16/500 signal centered on 7073.25KHz Olivia MFSK is an amateur radioteletype protocol designed to work in difficult (low signal to noise ratio plus multipath propagation) conditions on shortwave bands …
2Vocoder — A vocoder (  /ˈvoʊk …
3Digital video testing — in broadcast video, for example, is the process of validating and verifying that the video content and other data is being correctly processed, stored and transported. Despite the fact that the data is digital, most digital tv (DTV) system… …
4NICAM — This article is about a compression form for digital audio. For the media content rating institute, see Netherlands Institute for the Classification of Audiovisual Media. NICAM stands for Near Instantaneous Companded Audio Multiplex. It is an… …
5SIGSALY — exhibit at the National Cryptologic Museum In cryptography, SIGSALY (also known as the X System, Project X, Ciphony I, and the Green Hornet) was a secure speech system used in World War II for the highest level Allied communications. It pioneered …
