7.This text for the test of the numerical videofrequency system, the diagraph principle and method of the logarithms word videofrequency signal carry on a study."
9.By using computer technology on text, image, cartoon, videofrequency & audio frequency, and special programme mode on Authorware, we work out the computer courseware;
10.To implement and simplify conventional videofrequency transmission method, a videofrequency transmission system based on NetMeeting & COM (NM COM) is implemented by using COM C Component Object Model) and NetMeeting SDK (Software Development Kit).
