error resilient h 264 video encoder with lagrange multiplier optimization based on channel situa
Báo cáo hóa học: "Efficient Video Transcoding from H.263 to H.264/AVC Standard with Enhanced Rate Control" pot
... methods together with the enhanced rate control Not surprisingly, the fluctuation of PSNR obtained by transcoding with the proposed rate control method is less than that of the H. 264/ AVC RC method ... inferior to that obtained by the H. 264/ AVC RC scheme both with and without downscaling, while the total encoding time of scheme (II) is reduced by a factor of about compared with that of the H. 264/ AVC ... deviation of the PSNR performance obtained using the H. 264/ AVC RC method is slightly better than that achieved by using the proposed fast transcoding methods with existing H. 264/ AVC rate control However,...
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Báo cáo hóa học: " Research Article Efficient Transmission of H.264 Video over Multirate IEEE 802.11e WLANs" docx
... CAPS with error and 30 stations BKGND EDCA with error and 30 stations BKGND EDCA no error and 30 stations BKGND CAPS no error and 30 stations BKGND CAPS with error and stations BKGND EDCA with error ... noted that the performance gain in the case of NAL aggregation is due to the reduction of the MAC and PHY overhead This is based on the fact that the MAC and PHY layers add considerable overhead ... flows have to partly use EDCA Knowing that video is error resilient, we may accept higher PHY error rates and use higher transmission rate in order to achieve higherguaranteed throughput Using this...
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Domestic Wastewater Reclamation Coupled with Biofuel/Biomass Production Based on Microalgae: A Novel Wastewater Treatment Process in the Future
... the microalgal cultivation unit Considering the inorganic nutrient removal and the biofuel/biomass production, the selection rules should contain: high growth rate in secondary effluent of the ... wastewater reclamation coupled with biofuel/biomass production based on microalgae is shown in Fig The primary settlement tank in the novel process is the same as the conventional one - 200 - Journal ... which may be made from the wetland plants as will be discussed later In this process, high-concentration of organics can be acquired through flocculation and filtration, and therefore, water with...
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Báo cáo khoa học: Fast set-up of doxycycline-inducible protein expression in human cell lines with a single plasmid based on Epstein– Barr virus replication and the simple tetracycline repressor ppt
... With the ergothioneine transporter from human (ETTh; see Fig 3A) and enhanced green fluorescent protein (eGFP) chimeras of ETTh and of ORCTL 3h (not shown), the high signal-to-noise ratio of the ... will then lack a poly(A) tail, which is a major stabilizing factor Conversely, without a polyadenylation site and thus without endonucleolytic cleavage, the mRNA could become much longer, which would ... stimulation by a factor of 9.7) Thus, the background in the off-state was much lower with pEBTetD than with pEBTet However, in contrast to expression of membrane proteins, the level of expression of...
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Báo cáo sinh học: "Prediction error variance and expected response to selection, when selection is based on the best predictor for Gaussian and threshold characters, traits following a Poisson mixed model and survival traits" potx
... chapters start with general considerations, next each of the four models are considered and each chapter ends with its own discussion and conclusion The paper ends with a general conclusion THE MODELS ... Selection based on the best predictor and the (i, j)’th row of the matrix Z, is the vector with all elements equal to zero except for the li(j) ’th coordinate, which is equal to one Using (4) with ... chosen based on the best predictor of their breeding values, then the expected response to selection, that can be obtained on the phenotypic scale in the offspring generation (compared to a situation...
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Báo cáo sinh học: " A strategy of tumor treatment in mice with doxorubicin-cyclophosphamide combination based on dendritic cell activation by human double-stranded DNA preparation" doc
... evaluate the efficacy of vaccination with human dsDNA preparation, we chose a strategy whereby mice were treated with preparation of fragmented dsDNA on the background of pretreatment with Dox plus ... each treatment modality alone [39,50] From comparisons of schedules, the standard with additional immunization with tumor homogenate, it followed that the presence of specific antigens further ... enhanced the suppression effect on tumor growth There were reasons for suggesting that the integration of cytostatics with dsDNA preparation may be a treatment modality for enhancing regression...
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Báo cáo hóa học: " Error-resilient video coding with end-to-end ratedistortion optimized at macroblock level" doc
... comparing HRMIR with Optimal Intra, for most of the frames, PSNR of HRMIR is higher than that of Optimal Intra Another advantage of the HRMIR approach is that the video quality for each frame is ... than the other two approaches, which is an essential characteristic of subjective high-quality video When the encoder adopts sub-pixel ME, the accuracy of the end-toend distortion calculated with ... best video quality among the three approaches The error- resilient performance of proposed HRMIR approach is robust on different error distribution models V Conclusions In this paper, a novel Hybrid...
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Báo cáo hóa học: " Research Article Subjective Quality Assessment of H.264/AVC Video Streaming with Packet Losses" potx
... differ in their responses to the stimuli The result of the test for both the resolutions indicates that the the null hypothesis cannot be rejected, as a further proof of the fact that the two datasets ... that is, how well an arbitrary monotonic function describes the relationship between two sets of data The scatter plots show that the data from PoliMI are usually slightly shifted towards higher ... in the test material Each bitstream was decoded with the H. 264/ AVC reference software decoder with motion-compensated error concealment turned on [18] 2.2 Environment Setup Each test session involved...
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Tài liệu Halsted.Press.H.264.And.MPEG-4.Video.Compression.Video.Coding.For.Next.Generation.Multimedia.eBook-LiB docx
... each other Each sees a small, clear image of the other on the phone’s screen, without any of the obvious ‘blockiness’ of older-model video phones After the call has ended, you call up a live video ... Tottenham Court Road, London W1T 4LP, UK, without the permission in writing of the Publisher Requests to the Publisher should be addressed to the Permissions Department, John Wiley & Sons Ltd, The ... are based on lossy compression, in which greater compression is achieved with the penalty that the decoded signal is not identical to the original The goal of a video compression algorithm is...
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Nghiên cứu khả năng ứng dụng mã hóa video SVC h 264 cho truyền tải video trên hệ thống thông tin di động LTE
... cho khả điều chỉnh (h nh 2.15): Khả điều chỉnh thời gian: Lớp mã hoá độ phân giải thời gian thấp tốc độ khung h nh thấp, lớp tăng cường thêm vào làm tăng tốc độ khung h nh trình tự giải mã Khả ... h a cho video theo cách mà nhiều phiên tín hiệu video giải mã loạt bitrate, độ phân giải không gian / độ phân giải thời gian tốc độ khung h nh có hiệu Bằng cách kết h p nhiều phiên mã h a, phân ... giải mã h a (decoder) 2.6 Cú pháp H. 264 H. 264 cung cấp định dạng định nghĩa rõ ràng cú pháp cho thể video nén thông tin liên quan 2.7 Các profiles H. 264 Tiêu chuẩn mã h a video H. 264 định nghĩa 21...
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Chuẩn mã hóa video tiên tiến H.264 docx
... 8x8 Trong cỏc trng hp phõn mnh vi cỏc mu 8x8 c truyn phn t cỳ phỏp ch liu phõn mnh 8x8 tng ng cú c phõn mnh nh thnh cỏc mnh nh hn 8x4, 4x8, 4x4 hay khụng (vi thnh phn chúi v thnh phn mu) H nh 2.15: ... Tỏch bit phng phỏp biu din nh vi kh nng tham chiu nh:Trong cỏc chun trc ú cỏc bc nh c tham chiu chiu (nh B) Hong Vn Tỳ Lun thc s khoa hc 50 khụng c s dng cho vic d oỏn cỏc nh khỏc chui video H. 264 ... tớn hiu Video Cú kh nng biu th thụng tin khong thi gian xoỏ mnh Hong Vn Tỳ Lun thc s khoa hc 24 CHNG 2: CHUN NẫN VIDEO H. 264 2.1 1.1 Gii thiu chung v b CODEC H. 264 2.1.1 B mó hoỏ (Encoder) H nh...
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Báo cáo hóa học: " Efficient bitstream switching for streaming of H.264/AVC coded video" doc
... bandwidth requirement for transmission of SSP-frames (they are used only once at the switching instant) will be much higher than the bandwidth derived from the FOR with SP-frames This high bit ... hence, the new step transitions may not coincide with the old ones Therefore, a new FOR function is required to be calculated for the sequence with the SP-frames, without violating the monotonicity ... function for “Mobile” sequence with upswitching Switching with “downstairs” reservation scheme As discussed earlier, one way to adapt to the changing network conditions is to switch among the multiple...
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Báo cáo hóa học: " FMO-based H.264 frame layer rate control for low bit rate video transmission" ppt
... level 3.0 The video sequences are chosen such that there are sequences with low, medium and high motion content Each frame is encoded four times with no FMO and with FMO enabled with 2, and slice ... sequences with low motion content, such as Akiyo and Claire, are comparable with the JM rate control However, it should be noted that PSNR gains are achieved at a slightly lower bit rate This means that ... inter-prediction if they belong to different slice groups This affects the computation of the motion vector difference and hence affects the coding performance In this article, we analyse the relationship...
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Báo cáo hóa học: " Research Article Rate-Distortion Optimization for Stereoscopic Video Streaming with Unequal Error Protection" ppt
... can be more than the previous right frame This shows why the c3 parameter of layer of the “Soccer” video is high when compared with the results of the “Rena” video EURASIP Journal on Advances ... transmission occurs The no-protection case represents the transmission of the video of no-loss case without any channel protection and only error concealment is used at the decoder The simulation results ... we have used [22], which is a multiview video codec based on H. 264 This codec is an extension of standard H. 264 with the structure given in Figure In this codec, B frames are not supported However,...
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Báo cáo hóa học: " Research Article Efficient MPEG-2 to H.264/AVC Transcoding of Intra-Coded Video" docx
... prediction modes In addition, DC prediction (DC Pred) can also be used Consider the rate-distortion calculation in a video encoder with RDO on, the conventional calculation of the Lagrange cost for one ... algorithms (Section 4) within the context of the TDT architecture, namely the fast mode decision based on ranking (TDT-R) and the algorithm based on temporal correlation (TDT-C) Comparisons are ... (7) In this subsection, we propose a fast intra mode decision algorithm that is based on the following observation: although choosing the mode with the smallest SATD value often misses the best...
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Báo cáo hóa học: " Research Article A Multiple-Window Video Embedding Transcoder Based on H.264/AVC Standard" ppt
... transformation used in H. 264/ AVC is an integrated transform with quantization scaling, which means the scaling multiplication is merged with the quantization The integer transform with quantization scaling ... performed with simple integer operations such as shifting and addition, which indicates no rounding mismatch between the encoder and the decoder The relationship between the pixel values at the encoder ... occupy the whole frame, the feature of channel preview is realized with the degenerated architecture of Figure The remaining issues are how the IMS and the MVR modules deal with the wrong reference...
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Báo cáo hóa học: " Research Article Transcoding-Based Error-Resilient Video Adaptation for 3G Wireless Networks" ppt
... application thus becomes ineffective On the contrary, the effects of errors at Eb /No rates above 10 dB reach to saturation, and the channel condition factor can remain the same As the channel condition ... from the input video scene The second step involves the modulation of the activity information with a channel condition function, which represents the signal-to-noise ratio experienced at the downlink ... network The video server sends the video stream through one of the video adaptation nodes, which performs the necessary video adaptation for heterogeneous media transmission This node operates the...
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Báo cáo hóa học: " Temporal Scalability through Adaptive M-Band Filter Banks for Robust H.264/MPEG-4 AVC Video Coding" pptx
... such as the GSM or UMTS ones, where errors often appear in bursts, the video transmission is confronted with time intervals when the channel is error- free and others where the channel is erroneous ... 0.5 dB Yet, this is obtained at the cost of a higher dependency on the intraframes, which again highlights the importance of choosing the hierarchical configuration in error- prone environments according ... scalability enhanced H. 264 encoder Standard compliant H. 264 decoder D B F ··· H. 264 encoder Channel H. 264 decoder Figure 16: Simulation chain The block denoted by Π corresponds to the interleaver...
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Báo cáo hóa học: " Editorial Advanced Video Technologies and Applications for H.264/AVC and Beyond" ppt
... prediction, fast motion estimation and mode selection, fast rate-distortion optimization (RDO), rate control, H. 263 to H. 264 transcoding, long video tracing, switched streaming, and error protection ... rate-control strategy for H. 264, which maximizes the video quality by determining the quantization parameter (QP) for each macroblock With a preanalysis coarse QP, the refinement of the QP is further ... standard with enhanced rate control,” by Nguyen and Tan devises an H. 263 to H. 264 transcoding system based on a motion vector reestimation scheme and a fast intra-prediction mode selection An enhanced...
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Báo cáo hóa học: " Error-Resilient Unequal Error Protection of Fine Granularity Scalable Video Bitstreams" pptx
... packetization algorithm ERROR- RESILIENT UNEQUAL ERROR PROTECTION In this section, we will present our error- resilient unequal error protection (ER-UEP) scheme with emphasis on the features mentioned ... applied, the resulting PSNR is higher in our scheme thanks for its strong error resilient capability At last, we evaluate the performances on channels with prediction errors when the total enhancement-layer ... Communications Technical Committee of the IEEE CAS Society Hua Cai received the B.S degree from the Shanghai Jiaotong University, Shanghai, China, in 1999, and the Ph.D degree from the Hong Kong University...
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