This paper discusses an approach that can be adopted to determine top/bottom fields in an interlaced video. Knowing the top and bottom field is important if the video is de-interlaced using Field Combination, Weaving + Bob, Discard, and other algorithms based on motion detection. Determining the field information helps to reconstruct the frame with lesser artifacts. This approach can be used if the top/bottom field information is not provided by the video decoder chip.