KingSky SkyEducation virtual classroom system is based on the IP protocol, and can be used in one-way satellite network, two-way satellite network, terrestrial network, etc. It uses some particular technologies in network video and audio transmission, including real online teaching, students communicating and problem discussing. Teachers may aim at each student’s degree, to tutor and lead the student by “face to face”, change the students attitude from passive receive to positive learning.  

　

Network structure diagram

　

n         Teaching live broadcast

n         Teaching live record

n         Electronic Whiteboard

n         Screen capturing and broadcasting

n         Teaching material synchronization broadcast

n         Teaching video broadcasting

n         Lecture broadcast control

n         Electronic pointer

n         Video and audio interaction

n         Text interaction

n         Electronic hand up

n         Teaching state monitor

n         Course table management

n         Classroom management

n         Teacher and student management

n         Multi classroom teaching broadcasting at the same time support

n         Online update support in the student end

Network protocol：

TCP/IP、UDP、Multicast, etc support.

Running environment

May run in one-way, two-way satellite communications network and terrestrial communications network.

Video and audio:

  Video:

l        Video compression format：MPEG-4

l        Mode support：PAL、NTSC

l        Min bandwidth：56Kbps（QCIF, 5/7f/s）

l        Max bandwidth：700Kbps（320x240, 25/30f/s）

  Audio :

l        stereo

l        Audio bandwidth：8Kbps～128Kbps

  System time delay：

  l        1±0.25s（Including time delay of satellite link datatransmission）