Abstract: The present invention provides a motion picture receiving device, comprising: image data receiving means for receiving encoded image data; decoding means for decoding the image data received by the image data receiving means; output means for outputting the image data decoded by the decoding means; and control means for determining an encoding condition of image data by communicating with a motion picture transmitting device which transmits the image data, and for controlling the decoding means to enable decoding of the image data encoded in accordance with the encoding condition; wherein, when the number of motion picture transmitting devices changes, the control means determines the encoding condition on the basis of the changed number of the motion picture transmitting devices.

Abstract: A moving-picture encoding apparatus according to the present invention has input means for input of an image; image encoding means with an error resilience tool for dividing the input image into a plurality of regions and encoding each of the regions in an order other than a scan order of the image; storing means for storing compressed data encoded by the image encoding means; sending means for sending the compressed data to the outside; and determining means for determining a first mode of outputting the compressed data to the sending means or a second mode of outputting the compressed data to the storing means, and for determining such an encoding condition as to turn on the error resilience tool in the case of the first mode or as to turn off the error resilience tool in the case of the second mode; wherein the encoding is carried out according to the encoding condition determined in this manner, the compressed data is transmitted to the sending means in the case of the first mode, and the compressed data