JPS6469182A - Movement compensation system for variable block size - Google Patents

Abstract

PURPOSE:To improve transmission efficiency by dividing a block to a small block until forecasting error becomes smaller than a threshold level when the forecasting error obtained as the result of movement compensation is bigger than the prescribed threshold level. CONSTITUTION:In a transmission part 1, for an inputted signal (original picture information), the movement compensation is executed by obtaining the forecasting error by a movement compensation means 2, quantization is executed by a quantization means 3 and encoding is executed by an encoding means 4. Then the inputted signal is transmitted to a reception part 5. Then, in the reception part 5, for a received signal, decoding is executed by a decoding means 6 and the movement compensation is executed by a movement compensation means 7 in the same way as in the transmission part 1 and reverse quantization is executed by a reverse quantization means 8. Then the received signal is outputted as a reproduced image. That means, the threshold level is provided, the movement compensation is executed by minimizing the block until the error between the threshold level and the original picture becomes below the threshold level and the encoding in a frame is executed for the part where the change of movement is too violent to be executed the movement compensation at the last. Thus the transmission efficiency can be improved.