Analysis of the efficiency of snr-scalable strategies for motion compensated video coders (original) (raw)

Joint source-channel coding for motion-compensated DCT-based SNR scalable video

2002

Abstract In this paper, we develop an approach toward joint source-channel coding for motion-compensated DCT-based scalable video coding and transmission. A framework for the optimal selection of the source and channel coding rates over all scalable layers is presented such that the overall distortion is minimized. The algorithm utilizes universal rate distortion characteristics which are obtained experimentally and show the sensitivity of the source encoder and decoder to channel errors.

An operational rate-distortion optimal single-pass SNR scalable video coder

2001

Abstract We introduce a new methodology for signal-to-noise ratio (SNR) video scalability based on the partitioning of the DCT coefficients. The DCT coefficients of the displaced frame difference (DFD) for inter-blocks or the intensity for intra-blocks are partitioned into a base layer and one or more enhancement layers, thus, producing an embedded bitstream. Subsets of this bitstream can be transmitted with increasing video quality as measured by the SNR.

SNR scalable video coder using progressive transmission of DCT coefficients

1998

abstract The importance of signal-to-noise ratio (SNR) video compression algorithms has increased in the past few years. This emergence corresponds with the vast increase of products and applications requiring the transmission of digital video stream. s these new applications, including video telephony/teleconferencing, video surveillance/public safety, and video-to-demand, require limiting the bandwidth of the compressed bitstream to less than the capacity of the transmission channel.

On the influence of motion vector precision limiting in scalable video coding

2004

Recent studies on scalable video coding have not only substantiated the need for such technology but also made evident that many related problems remain open and need to be tackled if truly scalable video coding is to be achieved. One of these challenges relates to the coding of motion vectors. In conventional coders motion vectors are treated and coded in a non-progressive manner. Since scalable video coding targets decoding at several resolutions and a wide range of quality levels, the motion information needs to be encoded in an adaptive way. We propose a simple, yet efficient, strategy for scalable motion vector coding. The results show improvements of resolution scalability performance at lower-bit rates, while overcoming any negative influence at high resolutions and bitrates.

EFFICIENT SCALABLE MOTION CODING FOR WIDE-RANGE SCALABLE VIDEO COMPRESSION

2000

For a scalable video coder to cover a wide range of bit-rates, e.g. from mobile video streaming applications to TV broad- casting, it is essential that motion information presents some form of scalability. In this paper we propose a new accu- racy-scalable motion codec in a wavelet-based spatio-SNR- temporal-scalable framework. It allows to decode a reduced amount of motion information

Analysis of Coding Gain and Optimal Bit Allocation in Motion-Compensated Video Compression

Journal of Electrical Engineering, 2000

This paper describes mathematical frameworks on temporal and spatial predictive processing in the motion-compensated video compression. Firstly, the coding gain over intra coding is derived, regarding the bit allocation algorithm and Lagrange multiplier method. The optimal ordering of three different picture types (I, P and B pictures) is clarified according to image source characteristics. Secondly, a novel framework with the block-based multihypothesis motion-compensated optimal coding gain and bit allocation are derived in a closed-form expression.

SNR-scalable extension of H.264/AVC

2004 International Conference on Image Processing, 2004. ICIP '04., 2004

Abstract We present an SNR-scalable extension of the H. 264/AVC video coding standard. To achieve an efficient SNR-scalable bit-stream representation of a video sequence, the temporal dependencies between pictures are exploited by using an open-loop subband ...

On video SNR scalability

1998

Abstract We compare two SNR scalable video codecs. The first codec (CODEC1) is a three-layer single-pass quantization algorithm based on H. 263 and extends the work presented by Robers (see Master's Thesis Northwestern University, 1997) and Robers, Kondi and Katsaggelos (see Proc. SPIE Conf. on Visual Comm. and Image Proc., p. 201-12, 1998). The second codec (CODEC2) implements three layer SNR scalability as described in Annex O of the H.

Accuracy-scalable motion coding for efficient scalable video compression

Image Processing, IEEE International Conference, 2004

For a scalable video coder to remain efficient over a wide range of bit-rates, covering e.g. both mobile video streaming and TV broadcasting, some form of scalability must exist in the motion information. In this paper we propose a new (t+2D) wavelet- based spatio-SNR-temporal-scalable video codec, coupled with an accuracy-scalable motion codec. It allows to decode a reduced amount of

Bidirectional Scalable Motion for Scalable Video Coding

IEEE Transactions on Image Processing, 2010

Motion information scalability is an important requirement for a fully scalable video codec, especially in low bit rate or small resolution decoding scenarios, for which the fully scalable motion model (SMM) has been proposed. SMM can collaborate flawlessly with other scalabilities, such as spatial, temporal and quality, in a scalable video codec and it performs better than nonscalable motion model. To further improve the SMM, this paper further extends the algorithm to support hierarchical B frame structure and bidirectional or multidirectional motion estimation and, moreover, provides the corresponding rate distortion optimized estimation. Several simulation results are presented to verify the improvements of this extension.