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This paper proposes an error resilient video coding algorithm in H.264/AVC for packet-loss networks, which involves an inter frame prediction scheme and a joint source-channel rate-distortion optimization (RDO) function for both inter mode decision and motion estimation. The suggested inter frame prediction and joint source-channel RDO function can significantly reduce the error propagation effect...
Coding multiview video content often benefits significantly from disparity compensation. More advanced inter-view predictions, to predict e.g., motion vectors and residues among views require disparity vector to identify blocks in different views corresponding to the same objects. Block-level disparity vectors in typically approaches are either transmitted thus with additional overhead, or predicted...
Joint multi-view video model (JMVC(6.0)) proposed the fixed view-temporal prediction structure for the standardization multi-view video coding (MVC), which is difficult to cope with various characteristics with a fixed prediction structure. A multi-view coding scheme based on correlation analysis is proposed in this paper, which differs from the conventional MVC schemes with single inter-view prediction...
In this paper, we present a complete framework of an end-to-end error resilient transmission of 3D video over Digital Video Broadcasting - Handheld (DVB-H) and provide an extensive analysis of coding and transmission parameters. We perform the analysis for different coding and error resilience schemes using different contents coded at different bitrate levels. Throughout the experiments, we investigate...
The paper describes a technique for compression of a stereoscopic video pair together with the corresponding two depth maps. The proposed encoder produces a joint bit-stream for two viewpoint video sequences and two depth maps. Thus the headers with the control information is shared for all 4 video items. Moreover mutual correlation between these items is exploited by use of the multiview compression...
In this work, we propose a model-based layer bit allocation algorithm for joint spatial-quality (S-Q) scalability in H.264/SVC. The complicated inter-layer dependency is decoupled by the proposed spatial and quality rate and distortion (R-D) models. We show that the R-D characteristics of a dependent layer can be represented by a number of independent functions with GOP as a basic coding unit. Then,...
This paper presents a perceptual H.264/AVC video coding method based on a foveated just-noticeable-distortion (JND) model. Since the perceptual acuity decreases with the increased eccentricity, a foveation model is adopted to further explore the perceptual redundancy in addition to the spatial and temporal just-noticeable-distortion models. Bit allocation and rate-distortion optimization algorithms...
Rate control regulates the output bit rate of a video encoder in order to obtain optimum visual quality within the available network bandwidth and to maintain buffer fullness within a specified tolerance range. In this paper, we propose a novel rate control scheme for H.264/AVC video compression with a number of new features. We first introduce a calculation approach of frame complexity based on the...
This paper proposes a novel fast algorithm for reducing the computational complexity in intra mode prediction process of H.264/AVC. The proposed method makes use of the temporal correlation between adjacent frames. It is observed that most of selected modes of the co-located macroblock (MB) in the previous frame are the same as the best modes of MB in the current frame and that the sum of the absolute...
To provide heterogeneous device capability in the video multicasting/broadcasting, the layered multicast can be exploited. However, previous statistical multiplexing system do not consider to support layered multicast. In order to support heterogeneous capability for broadcasting, this paper presents statistical multiplexing system for layered multicast. In proposed system, video sequences for multiple...
Traditionally, block-based motion estimation (ME) searches for the best motion vector (MV) for one block at a time based upon a pre-defined ME cost. The ME cost is often a function of the best MV and its predictor (MVP). In H.264/AVC, MVP of a block is calculated from MVs of its neighboring blocks in the past. Therefore, the ME decision of a current block is affected by the neighboring blocks in the...
This paper revisits the problem of source-channel coding for error-resilient video streaming, using redundant encoding. We propose a new method to jointly optimize the macroblock (MB) mode in both the primary and the secondary, redundant encoding. Encoding decisions are based on end-to-end distortion using the ROPE estimate, and are adaptive at the MB level. Further, we present a reduced complexity...
An approach to scalable multi-view video coding with joint best basis wavelet packets is examined in this paper. A 4-D wavelet transform is used to decorrelate the multi-view video data temporally, view-directionally, and spatially for efficient scalable compression. Motion compensated temporal filtering (MCTF) is used for temporal, and disparity compensated view filtering (DCVF) for view- directional...
Flexible macroblock ordering (FMO) is one of the effective error resilient tools in H.264/AVC video coding standard. Nevertheless the issue of how to suitably arrange the macroblocks in suitable FMO mapping type for different video applications is yet to be clarified and investigated. In this paper, we are analyzing the tradeoff and effectiveness of the six fixed FMO types, and based these six fixed...
In this paper, we present a novel adaptive GOP structure(AGS) for H.264/SVC. Proposed method adaptively defines the GOP structure by analyzing the input sequence characters. The accumulated difference of luminance pixel components is utilized to set a threshold for adaptive GOP size definition. Another scene change detection method is also proposed to reorganize the GOP structure. Different from previous...
Low bit-rate live encoding and streaming of video over wired or wireless channels, as utilized in place-shifting applications, need to adapt the frame rate and bit-rate according to content and channel conditions. Typical rate control schemes work with a given target frame rate and can result in irregular frame skips that are induced by buffer conditions and quantizer saturation. Prior methods proposed...
This paper describes a new transcoding algorithm, able to transcode any coded (e.g. MPEG-2) bit-stream into an H.264 sequence with arbitrary spatial resolution change. The visual quality at a given input and output bit-rate is close or equal to full decoding followed by a full encoding (0.5 dB-to-2 dB less in PSNR than that of re-encoding the stream at the target resolution) while, from the complexity...
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