| 摘要 |
An MPEG-2 video decoding system is disclosed, which is applied to a digital TV or a digital video conference. In the present invention, "I' or "P' as a reference frame is reduced in a horizontal direction at 1/2, and then is stored in an external memory. Meanwhile, in a case of "B' picture which is not used as a reference frame, "B' picture is reduced in both horizontal and vertical directions by 1/2, so that "B' picture is reduced at 3/4, and then is stored in the external memory. Accordingly, it is possible to reduce memory at 50% to 62.5% and to maintain a good picture quality in the present invention. Also, field information of the vertical direction is maintained, thereby decreasing drift errors during decoding MPEG video.
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