Inter frame

About: Inter frame is a(n) research topic. Over the lifetime, 4154 publication(s) have been published within this topic receiving 63549 citation(s).

Displacement Measurement and Its Application in Interframe Image Coding

Abstract: A new technique for estimating interframe displacement of small blocks with minimum mean square error is presented. An efficient algorithm for searching the direction of displacement has been described. The results of applying the technique to two sets of images are presented which show 8-10 dB improvement in interframe variance reduction due to motion compensation. The motion compensation is applied for analysis and design of a hybrid coding scheme and the results show a factor of two gain at low bit rates.

Analysis of video transmission over lossy channels

Abstract: A theoretical analysis of the overall mean squared error (MSE) in hybrid video coding is presented for the case of error prone transmission. Our model covers the complete transmission system including the rate-distortion performance of the video encoder, forward error correction, interleaving, and the effect of error concealment and interframe error propagation at the video decoder. The channel model used is a 2-state Markov model describing burst errors on the symbol level. Reed-Solomon codes are used for forward error correction. Extensive simulation results using an H.263 video codec are provided for verification. Using the model, the optimal tradeoff between INTRA and INTER coding as well as the optimal channel code rate can be determined for given channel parameters by minimizing the expected MSE at the decoder. The main focus of this paper is to show the accuracy of the derived analytical model and its applicability to the analysis and optimization of an entire video transmission system.

Wyner-Ziv coding of motion video

Abstract: In current interframe video compression systems, the encoder performs predictive coding to exploit the similarities of successive frames. The Wyner-Ziv theorem on source coding with side information available only at the decoder suggests that an asymmetric video codec, where individual frames are encoded separately, but decoded conditionally (given temporally adjacent frames) could achieve similar efficiency. We report the first results on a Wyner-Ziv coding scheme for motion video that uses intraframe encoding, but interframe decoding.

Motion-compensated television coding: Part I

Abstract: We present methods of estimating displacements of moving objects from one frame to the next in a television scene and using such displacements for frame-to-frame prediction. Displacement is estimated by a recursive algorithm which seeks to minimize a functional of the prediction error. Several simplifications of the algorithm are presented which make it attractive for hardware implementation. Performance of the algorithm is evaluated by computer simulations on two sequences of moving images containing various amounts and types of motion. In both cases, the use of displacement-based (or motion-compensated) prediction results in bit rates that are 22 to 50 percent lower than those obtained by simple “frame-difference” prediction, which is used commonly in the interframe coders.