Engineering and technology

Mobile edge computing

Jovan Stosic November 22, 2017

Mobile Edge Computing (MEC) is a network architecture concept that enables cloud computing capabilities and an IT service environment at the edge of the cellular network. The basic idea behind MEC is that by running applications and performing related processing tasks closer to the cellular customer, network congestion is reduced and applications perform better. MEC technology is designed to be implemented at the cellular base stations, and enables flexible and rapid deployment of new applications and services for customers. Combining elements of information technology and telecommunications networking, MEC also allows cellular operators to open their radio access network (RAN) to authorized third-parties, such as application developers and content providers.
Technical standards for MEC are being developed by the European Telecommunications Standards Institute, which has produced a technical white paper about the concept.

Source: Mobile edge computing – Wikipedia

Low-density parity-check code – Wikipedia

Jovan Stosic November 21, 2017

In information theory, a low-density parity-check (LDPC) code is a linear error correcting code, a method of transmitting a message over a noisy transmission channel.[1][2] An LDPC is constructed using a sparse bipartite graph.[3] LDPC codes are capacity-approaching codes, which means that practical constructions exist that allow the noise threshold to be set very close (or even arbitrarily close on the binary erasure channel) to the theoretical maximum (the Shannon limit) for a symmetric memoryless channel

Source: Low-density parity-check code – Wikipedia

[MMV] HDMI-DVI converter failure (no screen) – Troubleshooting – OrangePi – Powered by Discuz!

Jovan Stosic November 11, 2017

 

Install sunxi-tools

  1. sudo apt-get install sunxi-tools

Copy the Code

Boot partition should be mounted to /media/boot in loboris images. As root, make backup of  script.bin and convert it to script.fex with bin2fex and edit script.fex with editor of your choice

  1. sudo su
  2. cd /media/boot
  3. cp script.bin script.bin.bak
  4. bin2fex script.bin script.fex
  5. nano script.fex

Copy the Code

Find section [hdmi_para] and add these parameters under it

  1. hdcp_enable = 0
  2. hdmi_cts_compatibility = 1

Copy the Code

Save the file and convert script.fex back to script.bin

  1. fex2bin script.fex script.bin

Copy the Code

Reboot

Source: [Mini 2] HDMI-DVI converter failure (no screen) – Troubleshooting – OrangePi – Powered by Discuz!