| 摘要 |
PURPOSE:To reduce the number of reproducing vector without increasing the volume of transmitting information by forecasting the average value of a block to be encoded using the average value of a picture element block already encoded and applying a vector quantization after an average value forecasting and encoding process. CONSTITUTION:An input block is vector-quantized at and transmitted from a vector quantizer 1, however, the block quantized at the quantizer is stored at an average value memory 3 as the block already reverse-quantized and encoded at a vector reverse quantizer 2. And for example, 1/2 of the average value between a preceding block (c) and a block (d) of one preceding row is added on the block, the average value being calculated and the average value forecasting and encoding process that the above average value is subtracted from the input block is performed. And a value that the average value is forecasted and encoded is quantized at and transmitted from the vector quantizer 1. Thereby, the number of the reproducing vector can be reduced. |
