Spatiotemporal adaptive quantization for an efficient video rate control

An Efficient Adaptive Boundary Matching Algorithm for Video Error Concealment

Sending compressed video data in error-prone environments (like the Internet and wireless networks) might cause data degradation. Error concealment techniques try to conceal the received data in the decoder side. In this paper, an adaptive boundary matching algorithm is presented for recovering the damaged motion vectors (MVs). This algorithm uses an outer boundary matching or directional tempo...

An Efficient Rate Control Algorithm for a Wavelet Video Codec

Rate control plays an essential role in video coding and transmission to provide the best video quality at the receiver’s end given the constraint of certain network conditions. In 17 this paper, a rate control algorithm using the Quality Factor (QF ) optimization method is proposed for the wavelet-based video codec and implemented on an open source Dirac 19 video encoder. A mathematical model ...

Video Coding with Adaptive Vector Quantization and Rate Distortion Optimization

The object of this dissertation is to investigate rate-distortion optimization and to evaluate the prospects of adaptive vector quantization for digital video compression. Rate-distortion optimization aims to improve compression performance using discrete optimization algorithms. We first describe and classify algorithms that have been developed in the literature to date. One algorithms is exte...

An adaptive quantization algorithm for MPEG-2 video coding

An adaptive quantization algorithm for MPEG-2 video coding using neural network is presented in this paper. The proposed algorithm uses BP neural network to divide the macroblock activity into one of four categories: flat. edge. texture. fine-texture. and thus the macroblock can be quantized adaptively according to the human vision system (HVS) sensitivity. Experiment results show that this met...

Adaptive quantization of image subbands with efficient overhead rate selection