Patent ID: 6525774
Filing Date: 2003-02-25
Classification: H04N

Abstract:
An inverse telecine converting device for converting quasi-television motion picture information back to original cinema motion picture information, the quasi-television motion picture information having been obtained by quasi-converting the original cinema motion picture information, the inverse telecine converting device comprising:means for inputting the quasi-television motion picture information including field picture information pieces time-sequentially arranged at a rate of N frames per second (with N being a natural number), each frame of the quasi-television motion picture information including top and bottom field picture information pieces such that one of every P field picture information pieces (with P being a natural number) of the quasi-television motion picture information is a repetitive field picture information piece; means for producing judgment frames on the basis of timely-adjacent field picture information pieces of the quasi television motion picture; means for determining the structure of each judgment frame as being one of a frame structure and a field structure; means for identifying the repetitive field picture information pieces on the basis of the determined structures corresponding to timely-adjacent ones of the judgment frames; and means for outputting the original cinema motion picture information arranged at a rate of M frames per second (with M being a natural number), wherein the structure determining means subjects each judgment frame to orthogonal transformation and determines whether each judgment frame has the frame structure or the field structure on the basis of a high-order coefficient in the vertical direction of coefficients of a frequency area obtained through the orthogonal transformation.