8×8 transform and quantization coding in h 264 avc
báo cáo hóa học:" Research Article FPSoC-Based Architecture for a Fast Motion Estimation Algorithm in H.264/AVC" doc
... pixels Hexagon search has search points Multi-big hexagon search has (1/4)(|s|) hexagons, each containing 16 search points Extended hexagon search has search points Diamond search has search points ... algorithm complexity of this search step is O(2s) (2) Hexagon and extended hexagon search: There are search points each in both of these search steps, yielding a total of 12 search points Thus the ... Algorithmic state machine chart for the modified SUMH algorithm the addresses of the candidate blocks and a flag indicating that BRAM initialization is complete In state S5, the processing units and...
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Báo cáo hóa học: " Research Article Priority-Based Heading One Detector in H.264/AVC Decoding" pdf
... is pushed to a high position which indicates that only positions 14 and 15 have nearly zero codes distribution However, both intra- and interframes-share the same tendency that the higher the position ... into three parts, each of which handles a different chunk of input bits with varying priority Dec2, which has the highest priority, processes the first two input bits and is active all the time ... whole H. 264/ AVC decoding system The advantage of our design is drawn from exploiting the high probability of “heading one” lying in the first few bits of a codeword By using a nonuniform decoding...
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System on chip design of a high performance low power full hardware cabac encoder in h 264 AVC
... loss introduced by the shrinking of current interval and achieve incremental encoding and decoding procedure, an incremental output method of arithmetic encoding is proposed in [51], in which the ... another important technique that improves the encoding performance of H. 264/ AVC It is necessary to support both CABAC and RDO in the high quality and high definition H. 264/ AVC applications; however, ... transform coefficients, and Exp-Golomb coding is applied to encode other MB-level and high level SEs For the Main and High profiles targeting at high bit-rate and high definition service such...
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Performance and complexity analyses of h 264 AVC CABAC entropy coder
... Binary Arithmetic Coding (CABAC) [5] is one of the entropy coding schemes in H. 264/ AVC, and is only supported in the Main profile Fig 2.1 shows the block diagram for encoding and decoding a single ... Arithmetic Coding In the binary arithmetic coding (BAC) stage, the bins are arithmetic coded Binary arithmetic coding is based on the principle of recursive sub-division of an interval length as ... operation when the current interval length, E falls below a specified interval length after coding a bin This is a recursive operation which resizes the interval length through scaling until the current...
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Báo cáo sinh học: " Research Article Automatic Modulation Recognition Using Wavelet Transform and Neural Networks in Wireless Systems" ppt
... where each graph represents FRP when the SNR is not lower that certain value A minimum SNR for which the FRP is less than 1%, SNRmin has been considered in these results Accordingly, the SNRmin ... Training Algorithm The classification process basically consists of two phases: training phase and testing phase A training set is used in supervised training to present the proper network behavior, ... will be distinct peaks in the wavelet transform of the signal and that of the normalized one resulting from phase changes at the times where the Haar wavelet covers a symbol change In what follows,...
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Advanaced video coding for reducing complexity in h 264 2
... H. 264 coding The lossless method checks the cost after each 4x4 block intra mode decision, and terminates if the cost is higher than the minimum cost of inter mode coding On the other hand, by using ... SUMMARY The new international video coding standard H. 264, also known as Advanced Video Coding (AVC) , has been proposed by JVT Compared to previous video coding standards, H. 264/ AVC has significantly ... for intra prediction in H. 264 video coding By making use of the edge direction histogram, the number of mode combinations for luma and chroma blocks in a macroblock (MB) that take part in the...
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Advanaced video coding for reducing complexity in h 264 3
... techniques One is intra coding, which makes prediction using the information inside the same frame The other is inter coding, which predicts using the information from other frames In common, the ... sequences, inter coding generally has much higher coding efficiency than intra coding However, this comes at the price of significantly higher complexity as compared to intra coding Inter coding employs ... effort has resulted in the standardization of H. 26L, which demonstrates much higher compression efficiency than existing ITU-T standards such as H. 261 and H. 263 In 2001, the ISO /MPEG joined ITU-T/VCEG...
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Báo cáo hóa học: " Research Article Improved Intra-coding Methods for H.264/AVC" docx
... we change the orders of standard deblocking loop filter of H. 264/ AVC to achieve extra gains without incurring extra complexity Extensive experiments show that intracoding of H. 264 can be further ... concludes the paper Two Prediction Schemes for Intracoding of H. 264/ AVC In this section, we will explain the improvement mechanism behind the recursive prediction scheme and the enhanced BMA ... Besides the proposed recursive intraprediction scheme (R scheme) and enhanced BMA intraprediction scheme (E-BMA scheme), the standard intraprediction scheme in H. 264/ AVC (S scheme) [1], the original...
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Báo cáo hóa học: " Editorial Advanced Video Technologies and Applications for H.264/AVC and Beyond" ppt
... Taiwan, in 1979, and the Ph.D degree from the University of Minnesota, Minneapolis, USA, in 1988, all in electrical engineering He was an instructor in the Chinese Naval Engineering School for his ... Circuits and Systems for Video Technology (CSVT) In March 2005 he has been appointed as a Guest Professor at the Chinese-German Hochschulkolleg (CDHK) at Tongji University in Shanghai Ming-Ting Sun ... switching in multirate-based video streaming systems” propose an efficient switching method by using an independent or a joint processing in the wavelet domain and an SPIHT coding scheme to achieve...
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Báo cáo hóa học: " Robust Transmission of H.264/AVC Streams Using Adaptive Group Slicing and Unequal Error Protection" pptx
... method is the first utilizing the explicit mode of the H. 264/ AVC flexible macroblock ordering (FMO) [13] in conjunction with channel coding techniques The resulting system is evaluated and is shown ... being of high-importance mainly corresponds to intense motion or high texture regions For example, in Figure 3(c) the “high” importance slice group coincide with foreman’s head which is the main ... Telematics Institute, Centre for Research and Technology Hellas, Thessaloniki, Greece His research interests include joint source and channel coding, multimedia networking, distributed source coding, ...
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Báo cáo hóa học: " Fast Motion Estimation and Intermode Selection for H.264" pptx
... the LH band (representing the horizontal edge information), x3 is the sum of the amplitude of the coefficients in the HL band (representing the vertical edge information), and x4 is the sum of the ... merge method The proposed FIMS splits all 16 × 16 MBs into × sub-MBs and determines the class of each × sub-MB by using both MVs in the LL band and the edge information The × sub-MBs with the same ... The vertical, horizontal, and diagonal edge information can be obtained from the absolute values of the wavelet coefficients in LH, HL, and HH bands, respectively The test of homogeneity hypothesis...
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Báo cáo hóa học: "H.264/AVC Video Compressed Traces: Multifractal and Fractal Analysis" potx
... according to H. 26 4AVC with quantization scale q p = 15 [14] the periodicity from the signal and then applying the Hurst estimator, more useful information may be obtained [22] In Table the Hurst indices ... For instance, when using neural network scheduling in packet switching node [15], outgoing traffic tends to be less fractal than the incoming one—the Hurst index decreases approaching to 0.5 (random ... developed in [32] The choice of a method is motivated by the fact that it retains high-frequency components in MF spectrum permitting sharp distinction between fine details emphasizing thus the singularities...
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Báo cáo hóa học: "Robust System and Cross-Layer Design for H.264/AVC-Based Wireless Video Applications" pptx
... at the decoder though the erroneous frame has already been decoded and displayed at the decoder In case of online encoding, this channel information is directly incorporated in the encoding process ... 1% (left-hand side) and 10% (right-hand side) For both cases, we assume that the considered user is also the worst-case user for which the system is optimized For each point shown in the figures ... to the processing as shown in Figure However, this approach usually requires significant changes in legacy hardware and existing network infrastructure Thus, solutions on higher levels of the protocol...
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Tổng quan về chuẩn nén MPEG-4 H.264/AVC và khả năng ứng dụng trong thực tiễn
... ảnh với tỉ số nén + Tách riêng h nh tham khảo h nh hiển thị: tiêu chuẩn trước có phụ thuộc h nh tham khảo h nh hiển thị, H. 264/ AVC mã h a chọn h nh ảnh để tham khảo gần với h nh ảnh mã h a cho ... ta thấy lượng tin chứa đựng h nh ảnh tỉ lệ nghịch với khả xuất ảnh đó, nghĩa kiện xảy chứa đựng nhiều thơng tin tổng số lượng thơng tin phần tử ảnh Gọi lượng tin trung bình h nh ảnh H( X) tính cơng ... h nh cáp, Internet TV H. 264/ AVC trở thành tiêu chuẩn cơng nghệ q trình sản xuất, phân phối truy nhập vào h thống Video Mã h H. 264/ AVC ngồi việc quan tâm đến hiệu mã h giống tiêu chuẩn mã h ...
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Báo cáo hóa học: " Efficient bitstream switching for streaming of H.264/AVC coded video" doc
... the switching instant) will be much higher than the bandwidth derived from the FOR with SP-frames This high bit rate of the SSP-frame can be reduced by changing the (QPSP, QPSP2) pairs, but this ... calculate the bandwidth utilization factor and the number of bits available in the decoder buffer just before the switching It should be noted here that the bits available in the buffer other than those ... rates and their FORs were derived Then, the modified H. 264/ AVC encoder was instructed to include the SP-frames at the transition points of the derived FORs Then, upswitching and downswitching between...
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Báo cáo hóa học: " Research Article Subjective Quality Assessment of H.264/AVC Video Streaming with Packet Losses" potx
... quality in absence of packet losses Each coded sequence was visually inspected in order to check whether the chosen QPs minimized the blocking artifacts induced Table 1: H. 264/ AVC encoding parameters ... sessions and the data gathered during the training was not included in the final test results In particular, for the training phase two different contents for each spatial resolution and five realizations ... 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...
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Báo cáo hóa học: " Research Article Efficient MPEG-2 to H.264/AVC Transcoding of Intra-Coded Video" docx
... W1 , and substituting (16) into (11) gives where H and Hinv are the kernel matrices the forward HT transform and inverse HT transform used in the H. 264/ AVC decoding process, respectively, and ... shown that with weighting matrices W1 and W2 to compensate for the different norms of HT, inverse HT and H. 264/ AVC quantization design, we can calculate the SSD distortion in the HT domain using ... (HT domain) Pixel buffer VLD: variable-length decoding (I)Q: (inverse) quantization IDCT: inverse discrete cosine transform HT: H. 264/ AVC × transform Figure 2: Transform- domain intra-transcoding...
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