Moving picture compression/encoding method conversion device and moving picture communication system

A moving image compression-coding system conversion device for mutually converting a coded bit stream between a transmission side moving image coding device and a receiving side moving image decoding device having different 5 moving image compression-coding systems, the moving image compression-coding system conversion device comprising:

• a decoding unit for decoding a moving image signal, which is compression-coded, outputted from the transmission side moving image coding device;
• a coding control unit for setting a parameter for compression-coding based on receiving decoding information outputted from the receiving side moving image decoding device;
• and
• a coding unit for compression-coding the moving image signal decoded by the decoding unit by using the parameter for compression-coding outputted from the coding control unit, wherein
• the coding unit starts operation when control information outputted from the coding control unit is inputted performs intra-frame coding to a first frame after starting the operation, and performs inter-frame prediction coding to a subsequent frame.