A video composition model that provides a set of application programming interfaces (APIs) to set device contexts, and determine capabilities of graphics hardware from a device driver. After the model determines a configuration, the model determines input video stream states applicable to frame rates, color-spaces and alpha indexing of input video streams, interactive graphics, and background images. The model prepares the input video frames and reference frames, as well as a frame format and input/output frame index information. The input video streams, interactive graphics and background images are processed individually and mixed to generate an output video stream.

A progressive displaying terminal and a video playing method and an image processing apparatus thereof are provided. The video playing method includes: extracting an odd field and an even field of each frame of an interlaced video, where the interlaced video has an initial resolution higher than a screen resolution of a progressive displaying terminal, and scaling the odd field and the even field of each frame respectively and then playing the odd field and the even field of each frame. In this way, the present disclosure eliminates the need of de-interlacing when playing an interlaced video on a progressive displaying terminal, so the hardware configuration requirements and the cost are reduced and a good picture quality is ensured during playing of the video.

A system and method of producing a frame of a video image from an interlaced field. In one embodiment, the method includes: (1) creating an equal-intensity trace from present samples in the field, (2) recognizing an equal-intensity path in the equal-intensity trace, (3) at least partially straightening the equal-intensity path and (4) using the equal-intensity path to determine an intensity value for a missing sample in the frame.