In the decoder , an end - of - block ( eob ) position of an incoming block received by the decoder is determined and a discrete cosine transform ( dct ) block type is determined based on the determined eob position 在該解碼器部分,將收到的輸入區(qū)塊中決定一區(qū)塊終止的位置,并根據此區(qū)塊終止位置決定一種離散馀弦轉換區(qū)塊形式。