| 摘要 |
PURPOSE:To make a deteriorated picture generated due to transmission error refresh frequently and to improve the accurate reproducibility of a picture by controlling the generation of inner-frame prediction more frequent in the environment where the transmission performance is bad or in the environment where the transmission performance deteriorates temporarily. CONSTITUTION:Frame information, picture encoding information, error detection information which can detect the error during frame transmission, and reception transfer error detection result information is multiple-distributed to a transfer frame. The error rate on the transmission side can be predicted based on a reception error (error rate) obtained from a reception error (error rate) detection circuit. A counter measuring the number of inter-frame prediction continuities for each processing unit block and outputting the number of inter-frame prediction continuity executions of an objective encoding block at the time of encoding is provided. The picture encoding control adapted to the transmission error character of the transmission path is performed by comparing the number of the maximum continuity inter-frame predictions adapted to the transmission path obtained from the predicted transmission transfer error rate and the outputted counter value and forcedly indicating the inter-frame prediction encoding against the encoding control part when the counter value is equal or exceeding to the number of the maximum continuity inter-frame predictions. |
