Inter frame

About: Inter frame is a research topic. Over the lifetime, 4154 publications have been published within this topic receiving 63549 citations.

Low latency cadence detection for frame rate conversion

Abstract: A frame rate converter sequentially buffers video frames in a sequence of video frames in a buffer and interpolates at least two of the plurality of video frames in the buffer based on at least one interpolation parameter, to form interpolated output frames. Conventiently, the interpolation parameter is adjusted with each newly buffered frame in dependence on the current value of the cadence of the frame sequence. In this way, delays associated with cadence detection may be reduced.

Compression of 3D mesh sequences by temporal segmentation

Abstract: We describe a compression method for three-dimensional animation sequences that has notable advantages over existing techniques. We first aggregate the frame data by similarity and reorganize them into clusters, which results in the sequence split into several motion fragments of varying lengths. To minimize the number of clusters and obtain optimal clustering, we perform frame alignment, which eliminates the “global” rigid transformation from each frame data and use only “pose” when evaluating the similarity between frames. We then apply principal component analysis for each cluster, from which we get coordinates of corresponding frames in a reduced dimension. Because similar frames are considered, the number of coefficients required for each frame becomes smaller; thus, we obtain better dimension reduction for a given reconstruction error. Further, we perform intracluster compression based on linear coding. Because every motion fragment presents similar frames, conventional linear predictive coding can be replaced by key frame-based linear coding to achieve minimal reconstruction error. Results show that our method can obtain a high compression ratio, with a limited reconstruction error. Copyright © 2013 John Wiley & Sons, Ltd.

Seamless splicing for MPEG-2 transport stream video servers

Abstract: Current uncompressed video servers are capable of streaming multiple video clips back-to-back in such a way that they appear to be a single uninterrupted stream. This is a relatively simple process made possible by frame boundaries equally spaced with no interframe dependencies. With the adoption of MPEG-2 and DV digital television standards, the distribution of video in compressed format will become more common. This change is fueling the development of video servers capable of distributing compressed video in broadcast-ready format. The seamless concatenation and splicing of streams that has been taken for granted in the uncompressed domain becomes complex in the compressed domain due to the mechanics of video encoding. This paper describes the problems associated with concatenating MPEG-2 transport streams (TS) and a technique to perform frame accurate seamless splicing from one MPEG-2 TS to another on compressed stream video servers.

Video coding apparatus according to a feature of a video picture

Abstract: A variance between sequential video pictures is extracted, and then, a GOP boundary position is decided based on inter-frame variance information. Furthermore, simple motion estimation is carried out with respect to video pictures inside one GOP. If a motion variation between the video pictures is large, a small predictive frame interval is taken; to the contrary, if the motion variation is small, a large predictive frame interval is taken. The simple motion estimation is carried out between two downscaled feature planes at a timewise fixed interval with respect to a video picture which is discriminated to be an interlaced video picture, wherein a motion compensatory prediction error at that time is output as image variance information. If the image variance is small, coding is conducted by a frame structure; to the contrary, if the image variance is large, the coding is conducted by a field structure. With the above-described processing, it is possible to provide a video coding apparatus for deciding a GOP size and the predictive frame interval according to the feature of the input video picture, and another video coding apparatus for adaptively switching the coding by the frame/field structures according to the feature of the input video picture.