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Different system may have different request on coding efficiency and security, even the characteristics of the unreliable networks are fixed, such as bit error rate, packet loss rate and bandwidth. In this paper, a novel multiple description coding (MDC) scheme is presented for the unreliable networks, considering both the network characteristics and system request. An error-resilient problem based...
The use of Flexible Macroblock Ordering (FMO) in H.264/AVC as an error-resilient tool incurs extra overhead bits that reduces coding efficiency at low bit rate. To improve coding efficiency, we present an improved frame-layer H.264/AVC rate control that takes into consideration the effects of using FMO for video transmission. In this paper, we propose a new header bits model, an enhanced frame complexity...
Rate control is an important part of video coding. There are two disadvantages in frame layer rate control of JVT-G012 proposal for H.264 video coding standard. One is that the bit allocation in frame layer is uniform and another is that it does not take the encoded frame information into account. This paper presents a reformative frame layer rate control algorithm by combining frame complexity and...
This paper presents an enhanced rate control scheme for H.264 using motion detection and motion analysis. PSNR based measure is used for determining motion complexity and detecting scene changes. Motion vectors and rate distortion measures are further used to classify regions with motion inside a frame and macro-blocks are then grouped into slices using the flexible macro-block ordering feature of...
A novel model for controlled variable bit rate (VBR) video traffic is proposed. The proposed model is built based on the interaction of video coder and video bit stream that is controlled by a rate controller. The model parameters depend on the encoding and rate control parameters and also depend on the properties of video content. The proposed model not only captures the long-range dependent (LRD)...
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