73 results about "Telecine" patented technology

A video apparatus is provided with automatic deinterlacing and inverse telecine pre-filtering capability to automatically analyze the frames of the video to determine at least whether the video is one of telecine, non-telecine progressive and non-telecine interlaced formatted, and to automatically reformat the video into a non-telecine progressive format if the video is determined to be one of telecine and non-telecine interlaced formatted.

The present invention is generally directed to automated methods and systems for converting image streams having a first frame rate to a second frame rate without the need for user intervention. Embodiments of the present invention obviate the effects of processing of a telecine process. In one embodiment, where frames are encoded by a single video field, a statistical analysis of the differences between adjacent frames reveals a telecine pattern, thereby identifying which frames to remove. In another embodiment, where frames are encoded by even and odd video fields, which are interleaved to produce the frame, a statistical analysis of the differences between adjacent fields reveals the telecine pattern, identifies which frames to remove, and identifies frames that are candidates for re-interleaving.

A moving average filter with a weighting factor calculates a continuously programmable threshold to determine whether fields could be considered identical or not. This decision is used to detect the cadence of a TELECINE encoded video signal. This moving average filter is also used for detecting the presence of still images in the video data stream by detecting total difference in Y (luminance) of the fields and then calculating the average difference in luminance (Y) of the field. This average difference in luminance value indicates a degree of difference between fields. For two frames of data input to the system, each having two fields, a difference is calculated between the luminance values of the two top fields for each frame. From this difference value a maximum absolute difference history is stored, along with the Sum of Absolute Differences (SAD). The programmable threshold is then calculated by summing the saturated SAD history over time. If the present SAD is less than the program threshold, then a low point is detected (e.g., small difference between two fields) and if it follows TELECINE pattern, then the cadence of TELECINE is indicated.

A system and method for automatically adjusting color parameters during a film-to-digital transfer. An operator uses standard telecine equipment to preview scenes in order to determine a natural clustering of fields or scenes. Each cluster is processed separately. All the fields in a cluster are treated as one unit in the sense that color adjustments for the cluster are based on the cluster color histogram, which is computed by aggregating the colors from all pixels in the cluster. Constraints are specified for the cluster. Variables of a constraint may be automatically specified or determined by an operator based on observing sample frames from the cluster. In addition, the operator can nullify a constraint if desired. Within each cluster, the system adjusts red, green and blue intensities of the digitizing device, gains for each of these color channels, and other parameters. The system first determines which settings respect the constraints and then optimizes the solution. The solution is optimized such that the digital color distribution is as faithful as possible to the film color distribution subject to the constraints. This is achieved by adjusting the settings to maximize the entropy of the empirical, digital color histogram among all settings respecting the constraints.