The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Stereoscopic video as the simplest form of 3D video is already being used in consumer devices such as 3DTV and 3D mobile phone. When the 3D video from the 3D mobile phone is compressed and transmitted over error prone channels, error propagation due to packet loss leads to poor 3D visual quality. The objective of the paper is to provide error resilience 3D video using the well known multiple description...
TV delivery over IP networks (i.e. IPTV) has emerged as one of the major distribution and access techniques for broadband multimedia services. IPTV adopts H.264 as its coding standard due to its high video compression efficiency as well as powerful error resilience features. This paper presents studies on some of the H.264/AVC error resilience features applied to IPTV applications, namely, high definition...
Multi-view video coding has received a considerable amount of interest in recent years. However, error resilience for multi-view video coding has not yet been investigated in great depth. This paper presents a novel error resilience method to mitigate the effects of packet loss during transmission. Bandwidth efficient redundant coding is used, where the redundant stream is generated only for selected...
The paper presents a novel error robustness method for H.264/AVC video data, based on the redundant data encoding concept. The proposed redundant data codec incorporates the Wyner-Ziv (WZ) theory and motion vectors (MV) of the H.264/AVC scheme. The performance of the proposed method is evaluated under both error free and error prone Internet Protocol (IP) Packet network environments. The proposed...
Slice group coding using Flexible Macroblock Ordering (FMO) based on Macroblock (MB) importance in H.264/AVC has been studied for providing higher error robustness in error prone environments. However, the efficiency still needs to be improved and the high computational and time cost it causes remains to be an issue. In this paper, an Adaptive Macroblock-to-slice Allocation map (MBAmap) Updating scheme...
Many papers have shown that burst loss causes more severe damage to the reconstructed video quality than random loss for the same packet loss rate. With traditional interleaving methods, the consecutive lost packet positions will be interleaved to random positions, and after interleaving, the PSNR of burst loss can be close to the PSNR of random loss for the same packet loss rate. In this paper, a...
This paper proposes a cross-layer approach called routing-aware multiple description coding with multipath transport to support video communications over mobile ad-hoc networks. This approach establishes a packet loss model based on the MAC access mechanism and network parameters, and utilizes it along with the routing messages from multipath routing to estimate the packet loss probability of transmitted...
AVS is Chinese standard with independent intellectual property rights for the second-generation source coding. In this paper, we give an overview of AVS and stream structure. Then we analyze the influence of bit error in various group fields and classify those fields by effects on the quality of the video sequence. On this basis, we find out a method to describe the performance of error resilience...
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...
Multiple Hypothesis Motion Compensated Prediction (MHMCP) has been extensively studied and is known to be a very effective method for enhancing the error resilience of motion compensated prediction with little impact on coding efficiency for compressing moving picture sequences. MHMCP with 2 hypotheses (2HMCP) may be used within the H.264/AVC standard by implementing it under the generalized B pictures...
Research on error resilience in multi-view coding is currently receiving considerable interest. While there is a multitude of literature concerning error recovery in 2D video, due to the statistical difference in motion compensation among temporal frames and disparity compensation among view points, such methods are inadequate to cater to the requirements of multiview video transmission. This paper...
In video coding, intra coding plays an important role in both coding efficiency and error resilience. In this paper, a new intra coding method based on video epitomic analysis is proposed. Image epitome suitable for coding is extracted through video epitomic analysis, and is used to generate the prediction for each block. The mapping between the original image and image epitome as well as image epitome...
The delivery of High Definition Television (HDTV) over IP networks, namely the HD IPTV, has emerged as one of the major distribution and access techniques for broadband multimedia services. IPTV adopts H.264/AVC as its coding standard due to its high video compression efficiency as well as powerful error resilience features. This paper presents studies on some of these features applied to HD IPTV...
A new error concealment technique based on the coding modes is proposed for H.264 video sequences. The motion-compensation modes (i.e., block-partitioning types) of surrounding macroblocks are employed to predict the mode of a lost macroblock. This adaptive selection mechanism is combined with a refined set of candidate motion vectors. Experimental results show that the proposed method, as compared...
In video streaming applications, there are two main sources of distortion in video quality: source distortion caused by video compression and channel distortion derived from failures in transmission, including packet losses and bit errors. The impact of bit errors on the perceived video quality depends on several different factors, such as error resilience of the data format itself, used error concealment...
Intra coding is one of the most effective ways of reducing the impact of error propagation caused by predictive coding. However, intra coding requires a higher bitrate when compared to inter coding. In order to use Inter coding and reduce error propagation it is important that inter macroblocks predict from ??safe?? areas that have a decreased chance of spreading errors. To this end we propose a low...
A novel video coding scheme based on leaky prediction is proposed and its superiority against conventional predictive video coding is demonstrated in environments with moderate to heavy packet loss. The strength of the scheme stems from the fact that it explicitly takes into account the two modes of operation (packet loss or no packet loss) at the decoder and optimizes the corresponding reconstruction...
Leaky prediction schemes have been proposed to reduce transmission error propagation by trading off with video coding efficiency. We propose using leaky prediction to improve the robustness of generalized source channel prediction scheme for H.264/AVC in error prone scenarios. We apply leaky prediction selectively at a macroblock level based on a simple mean square error metric in order to reduce...
In this paper we describe a database containing subjective assessment scores relative to 78 video streams encoded with H.264/AVC and corrupted by simulating the transmission over error-prone network. The data has been collected from 40 subjects at the premises of two academic institutions. Our goal is to provide a balanced and comprehensive database to enable reproducible research results in the field...
Conventional rate-distortion (RD) optimized video coding is formulated for an error-free environment. Special considerations have to be made when transmitting video in lossy networks. In this paper we demonstrate a novel method of weighting the distortion used for mode decisions and motion estimation in H.264. By determining an appropriate weighting factor, motion vectors are biased towards macroblocks...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.