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  2. Rolling code - Wikipedia

    en.wikipedia.org/wiki/Rolling_code

    Remote controls send a digital code word to the receiver. If the receiver determines the codeword is acceptable, then the receiver will actuate the relay, unlock the door, or open the barrier. Simple remote control systems use a fixed code word; the code word that opens the gate today will also open the gate tomorrow.

  3. Telecommand - Wikipedia

    en.wikipedia.org/wiki/Telecommand

    Telecommand systems usually include a physical remote, which contains four key parts: buttons, integrated circuit, button contacts, and a light-emitting diode. [3] When the buttons on a remote are pressed they touch and close their corresponding contacts below them within the remote. [3]

  4. Error code - Wikipedia

    en.wikipedia.org/wiki/Error_code

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file

  5. Amazon Echo - Wikipedia

    en.wikipedia.org/wiki/Amazon_Echo

    The Alexa Skills Kit is a collection of self-service application programming interfaces (API), tools, documentation and code samples. Developers can also use the "Smart Home Skill API", [26] a new addition to the Alexa Skills Kit, to extend Alexa's compatibility with cloud-controlled lighting and thermostat devices. All of the code runs in the ...

  6. Error correction code - Wikipedia

    en.wikipedia.org/wiki/Error_correction_code

    Classical (algebraic) block codes and convolutional codes are frequently combined in concatenated coding schemes in which a short constraint-length Viterbi-decoded convolutional code does most of the work and a block code (usually Reed–Solomon) with larger symbol size and block length "mops up" any errors made by the convolutional decoder ...

  7. Universal remote - Wikipedia

    en.wikipedia.org/wiki/Universal_remote

    Harmony 670, a universal remote. A universal remote is a remote control that can be programmed to operate various brands of one or more types of consumer electronics devices. . Low-end universal remotes can only control a set number of devices determined by their manufacturer, while mid- and high-end universal remotes allow the user to program in new control codes to the re

  8. Error detection and correction - Wikipedia

    en.wikipedia.org/wiki/Error_detection_and_correction

    Error-correcting codes are usually distinguished between convolutional codes and block codes: Convolutional codes are processed on a bit-by-bit basis. They are particularly suitable for implementation in hardware, and the Viterbi decoder allows optimal decoding. Block codes are processed on a block-by-block basis.

  9. Burst error-correcting code - Wikipedia

    en.wikipedia.org/wiki/Burst_error-correcting_code

    Proof. We need to prove that if you add a burst of length to a codeword (i.e. to a polynomial that is divisible by ()), then the result is not going to be a codeword (i.e. the corresponding polynomial is not divisible by ()).