4 part 10 advanced video coding h 264

... diện tích ảnh hình chữ nhật gồm 16 x 16mẫu cho các thành phan chói và 8 x 8 mẫu cho một trong hai thànhphần màu Trang 14Các macroblock được tổ chức thành các slice MPEG-4 Part 10/H.264 hỗ trợ ... định, không dây va qua các giao thức truyền tải khác nhau Tính kế thừa của chuẩn nén MPEG-4 Part 10/H.264: = Phân chia hình ảnh thành các block bao gồm nhiều pixel = Khai thác triệt dé sự dư thừa ... face, Hybrid profile, Basic animated texture profile. 2.4 Chuẩn nén MPEG-4 Part 10/H.264 2.4.1 Giới thiệu chung về MPEG-4 part 10/H.264 Dé cung cấp nén video tốt hơn các chuẩn nén trước đó, chuẩnMPEG-4

Ngày tải lên: 14/04/2024, 17:50

... cho thành phần chói và thành phần màn -_ Bủ chuyển động, MIEG-4 Fan 10/H.264 cho phép các vector chuyển động không, hạn chế, tức là chúng có thể hướng ra ngoài miền ảnh MPEG Patt 19/H.264 hỗ ... như CAVLC hay CABAC 2.4.2.1 Các ảnh và bù chuyến động đủng trong MEG-4 Part 10/1264 4 Chia ảnh thành các macro-blocic Mỗi ảnh video, frzme được chia thanh cae macroblock có kích thước cô định ... slice chuyển đối, phương pháp sliee đư thừa được thêm vào 3.42 Cầu trúc bộ mã hón MPEG-4 pan 101.264 Lớp mã hỏa video của MPEG-4/H.264 là sự két hợp của mã hóa *hông gian va mi héa thời gian

Ngày tải lên: 01/06/2025, 04:58

... the temporal prediction compliant with the H.264/MPEG-4 AVC standard is pro-posed and discussed InSection 3.3the adaptation of this fil-ter bank scheme to the case of H.264/MPEG-4 AVC where the ... quality gain of 0.1 to 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 ... to such changes will be coded with higher qual-ity (the choice of the pattern will then be made such that they are placed at a low level of temporal resolution) and consequently ensure high rendering

Ngày tải lên: 22/06/2014, 23:20

... F Chang and D Messerschmitt, Designing high-throughput VLC decoder, Part I – concurrent VLSI architectures, IEEE Trans CSVT, 2(2), June 1992, 29 B-J Shieh, Y-S Lee and C-Y Lee, A high throughput ... (which will both be standardised as Parts of MPEG-4) are designed to store MPEG-4 Audio-Visual and H.264 Video data respectively Both formats are derivedfrom the ISO Base Media File Format, which ... stream This can beparticularly useful when decoding video streamed across a variable-throughput network such as the Internet, since a decoder can dynamically select the highest-rate stream that can

Ngày tải lên: 14/08/2014, 12:20

... Supertech Cordless Telephone System: Reader’s Review "This is one of the best cordless telephones we tested With 10 channels, the user never has to worry about interference or static A clear channel ... emergencies Our favorite feature is the built-in answering, machine The Supertech phone is the only cordless phone we tested that had this feature The answering machine includes remote message retrieval ... looking for in a cordless phone, we highly recommend the Supertech.” 4, What will happen to this telephone if the Oo Dd © ® electrical power is interrupted? (A) It will have to be repaired (B)

Ngày tải lên: 21/07/2014, 21:21

... that is at the heart of all of the major video coding standards.Chapter 4 looks at the standards themselves and examines the way that the standardshave been shaped and developed, discussing the ... for Y, Cb and Cr that are supported by MPEG-4Visual and H.264 4:4:4 sampling means that the three components (Y, Cb and Cr) have thesame resolution and hence a sample of each component exists ... = 4 976 640 bits The 4:2:0 version requires half as many bits as the 4:4:4 version Trang 12VIDEO FORMATS AND QUALITYFigure 2.11 4:2:0, 4:2:2 and 4:4:4 sampling patterns (progressive) 4:2:0 sampling

Ngày tải lên: 14/08/2014, 12:20

... 134 134134 134 134 134 100 120 149 169 100 120 149 169 100 120 149 169 100 120 149 169 75 95 124 144 89 110 138 159 110 130 159 179 124 145 173 194 109 117 146 179 117 150 179 187 96 146 175 ... the horizontal direction and contains residual horizontal frequencies and ‘HH’ ishigh-pass filtered in both horizontal and vertical directions Between them, the four subband Trang 14134 134 134 ... which the height of the graph at each position indicates the similaritybetween the original image and a spatially-shifted copy of itself The peak at the centre of thefigure corresponds to zero shift

Ngày tải lên: 14/08/2014, 12:20

... fourth data symbol. Figure 3.49 Arithmetic coding example Trang 4VIDEO CODING CONCEPTS•72 The principal advantage of arithmetic coding is that the transmitted number (0.394 inthis case, which may ... 10 years This codingmodel is at the heart of the two standards described in this book The technical details ofthe standards are dealt with in Chapters 5 and 6 but first Chapter 4 introduces the ... 0.34 → 0.42 0.34 is 10% of the range to this sub-range 0.42 is 30% of the range within the previous range. 6 Find the next sub- (0) 0.3 → 0.7 range. 7 Set the new range (3) 0.364 →0.396 0.364

Ngày tải lên: 14/08/2014, 12:20

... Object-based coding of high quality video with improved compression efficiency Table 5.2 MPEG-4 Visual profiles for coding synthetic or hybrid video Basic Animated Texture 2D mesh coding with still ... (Section 3.6 of Chapter 3 provides a more detailed ‘walk-through’ of the encodingand decoding process) The tools in the VLBV Core are based on the H.263 standard and the ‘short header’ mode enables ... that extends outsidethe boundaries of the reference VOP Figure 5.10 shows the lower-left corner of a currentVOP (right-hand image) and the previous, reference VOP (left-hand image) The hand hold-

Ngày tải lên: 14/08/2014, 12:20

... theleft-hand VO uses a binary alpha mask and the right-hand VO has a grey alpha mask whichhelps the right-hand VO to blend more smoothly with the background Other uses of greyshape coding include representing ... perspective (Figure 5.54) 5.4.3 The Advanced Coding Efficiency Profile The ACE profile is a superset of the Core profile that supports coding of grey-alpha videoobjects with high compression efficiency ... makethem semi-transparent (e.g the synthetic scene in Figure 5.45) Trang 5CODING ARBITRARY-SHAPED REGIONS •135Figure 5.44 Video scene with binary-alpha object (left) and grey-alpha object (right)

Ngày tải lên: 14/08/2014, 12:20

... to the chromablocks Example Figure 6.12 shows a residual frame (without motion compensation) The H.264 reference encoderselects the ‘best’ partition size for each part of the frame, in this case ... macroblock Trang 3H.264/MPEG4 PART 10•164 Table 6.1 H.264 slice modes I (Intra) Contains only I macroblocks (each block or All macroblock is predicted from previously codeddata within the same slice) ... component Each chroma block is partitioned in the sameway as the luma component, except that the partition sizes have exactly half the horizontal andvertical resolution (an 8× 16 partition in

Ngày tải lên: 14/08/2014, 12:20

... •203Table 6.13 Thresholds for determining whether to increment suffixLengthCurrent suffixLength Threshold to increment suffixLength 6 N/A (highest suffixLength) zero which means that suffixLength is always ... The transmitted bitstream for this block is 000000011010001001000010111001100 Note 1: Level (3), with a value of −3, is encoded as a special case If there are less than 3 TrailingOnes, then the ... way, the choice of suffix (and hence the complete VLC) is matched to the magnitude ofthe recently-encoded coefficients The thresholds are listed in Table 6.13; the first threshold is Trang 11THE BASELINE

Ngày tải lên: 14/08/2014, 12:20

... points have the lowest SAE If the (0,0) point or the centre of the diamvec-ondhave the lowest SAE, then the search terminates If a point on the edge of the diamond hasthe lowest SAE (the highlighted ... Figure 7.10 Nearest Neighbours Search Many fast search algorithms have been proposed, such as Logarithmic Search, chical Search, Cross Search and One at a Time Search [7–9] In each case, the performance ... and the first nine search locations are numbered ‘1’ The search location that gives the smallest SAE is chosen as the new search centre and a further eight locations are searched, this time at half

Ngày tải lên: 14/08/2014, 12:20

... for 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, ... 6SUMMARY 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 ... CHAPTER 1 INTRODUCTION 1 1.1 Background 1 1.2 Objectives 2 1.3 Thesis Contributions 3 1.4 Organization of the Thesis 4 CHAPTER 2 H.264 AND LITERATURE SURVEY 6 2.1 H.264 6 2.2 H.264

Ngày tải lên: 14/09/2015, 08:51

... with the state-of-the-art hardware technology, the real-time video coding using H.264/AVC is still a prohibitive task Therefore, algorithms for reducing the time complexity of H.264/AVC, while ... forward for H.264 The lossless approach checks cost after each 4x4 block intra mode decision, and terminates if the cost is higher than the minimum cost of inter mode coding The lossy approach, by ... Because of the computational complexity of H.264, the thesis aims at developing fast algorithms that can improve the encoding speed of H.264 without much loss of visual quality In detail, the objectives

Ngày tải lên: 14/09/2015, 08:52

... 3vậy phổ biến để tham khảo các tiêu chuẩn với các tên như H.264 / AVC, AVC / H.264, H.264 / MPEG-4 AVC, hoặc MPEG-4 / H.264 AVC, để nhấn mạnh di sản chung Thỉnh thoảng, nó còn được gọi là "bộ ... về tiêu chuẩn nén video H264I Giới thiệu chung về H264 H.264 hoặc MPEG-4, Mã hóa Video Nâng cao (MPEG-4 AVC) là tiêu chuẩn nén video dựa trên chuyển động dựa trên khối Tính đến năm 2014, nó là ... phép thông tin định thời được điều khiển và thay đổi riêng biệt bởi hệ thống mà không ảnh hưởng đến nội dung hình ảnh đã giải mã Những kỹ thuật này, cùng với nhiều kỹ thuật khác, giúp H.264 hoạt

Ngày tải lên: 28/09/2019, 09:49

... Wiegand. The authors are with the Fraunhofer Institute for Telecommunications, Hein-rich Hertz Institute, 10587 Berlin, Germany (e-mail: hschwarz@hhi.hg.de; marpe@hhi.fhg.de; wiegand@hhi.fhg.de). ... block-based hybrid video coding approach Although its basic design is very similar to that of prior video coding standards such as H.261, MPEG-1 Video, H.262 MPEG-2 Video, H.263, or MPEG-4 Visual, H.264/AVC ... overview how these requirements have been addressed in the design of the SVC extension of H.264/AVC III HISTORY OFSVC Hybrid video coding, as found in H.264/AVC [6] and all past video coding designs

Ngày tải lên: 26/03/2020, 03:42

... the contour in the lower half-plane The integral along the semi-circle vanishes due to Jordan’s Lemma −ıωx e lim dx = R→∞ C x R 1 548 We can evaluate the Fourier transform with the Residue Theorem ... e−|x−ξ| dξ −∞ When solving the differential equation L[y] = f with the Fourier transform, it is quite common to use the convolution theorem With this approach we have no need to compute the Fourier ... 1 547 For ω < 0, we will close the path of integration in the upper half-plane Let CR denote the semicircular contour from x = R to x = −R in the upper half-plane The integral along CR vanishes...

Ngày tải lên: 06/08/2014, 01:21