| 摘要 |
A method of processing digital image data such as obtained from a television screen for transmission along telephone lines such thtat the transmitted data can be transformed to produce images in colour. The method includes storing a frame of incoming digital image data in a frame buffer, transferring a group of tiles from said frame buffer to a tile buffer, generating a clock signal, generating address and sets of control signals in a state machine, applying the clock signal to a digital transformer and applying each address and set of control signals to said tile buffer to directly transfer a block of data in the tile buffer to the digital transformer. Next the data in the block is transformed, returned to the tile buffer and is written over the corresponding untransformed data in the tile buffer. These steps are repeated until all tiles in the tile block have been transformed and returned. The transformed tiles in the tile block are then coded so as to complete their compression. The compression steps are repeated until all tiles in the frame buffer are compressed. |
