Morse Chat vs Rattlegram

Features: - Communicate with fellow Morse enthusiasts from far and near simply by tapping dots and dashes. - Meet new friends in a number of public rooms (10 WPM or less, 15 WPM, 20 WPM or more, Test room and so on). - Share and exchange ideas with your Inner Circle by creating private rooms. - In private rooms, the owner can modify room details (room ID & name) and remove members. - Text your friends privately with direct messages. - 7 types of Morse keys to choose from (e.g. iambic). - NEW! “Playground” to test and train your Morse code sending skills. - Support for external keyboard. - Easily subscribe and unsubscribe to notifications by clicking the bell icon at the upper right corner. - Learn and practice Morse code in real conversations (click on the question mark icon in any chat screen to see Morse representations and the most common Morse abbreviations). - Auto-translate between Morse code, Morse representation and text while receiving or sending messages. You decide what to show and in which order in Settings. - Option to show live translation while typing the Morse code. - Try the app out as a guest or sign in with your Apple ID, Google account or Facebook account. - Completely adjust the app according to your preferences: 1. Choose the frequency and output mode of the Morse messages (audio, blinking light, flashlight, vibration or audio + blinking light). 2. Adjust the transmission speed when using auto-translate. 3. Change the theme (Cyan, Bright, Dark, Black). 4. Enable/disable auto-send, auto-translation and more. - Absolutely no ads. - Easily block annoying users. - Blog posts and the info screen provide detailed instructions on how to use the app. Morse Code Morse code is a communication system that uses a series of short signals (also known as dots or dits) and long signals (also known as dashes or dahs) to transmit characters. The initial version of it was developed by Samuel F. B. Morse as a method to transmit natural language through the telegraph in the mid-19th century. Morse Chat Morse Chat is an app that allows users to communicate with others using Morse code. Once you sign in, you’ll see 3 big buttons which correspond to 3 main ways of chatting. - Public Rooms. A number of rooms (10 WPM or less, 15 WPM, 20 WPM or more, Test room and so on) has been created to allow chatting with fellow Morse code enthusiasts. These rooms are open to everyone. Contact us if you have an idea for a new public room. - Private Rooms. These can be created by premium users, and joined by any user (premium or not) who gets the room ID and password (case sensitive) or is invited by an existing room member. - Direct Messages (DMs). These are private messages between two participants. Simply create a DM by searching the other user’s display name or call sign. Download Morse Chat now and say “Hello” to the world in Morse code! Privacy Policy: https://www.dong.digital/morsechat/privacy/ Terms of Use: https://www.dong.digital/morsechat/tos/

COFDMTV is based on COFDM (coded orthogonal frequency-division multiplexing) technology: - 160 ms long OFDM symbols - 6.25 Hz per sub-carrier - 1/8 guard interval - differentially encoded PSK (phase-shift keying) modulation - systematic polar codes for forward error correction Currently Modes 14, 15 and 16 are supported: Using either SPC(2048, 1392), SPC(2048, 1056) or SPC(2048, 712) with CRC32C aided SCL decoding and differential QPSK modulation for the payload. Only a bandwidth of 1600 Hz is needed and the transmission of either 85, 128 or 170 bytes take about one second with the leading noise and fancy header disabled.