ｽﾗｲﾄﾞ ﾀｲﾄﾙなし
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- ふじよし かやぬま
- 5 years ago
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1 (1) - katto@waseda.jp
2
3 Y U V R G B (1/30 ) RGB / YUV = B G R V U Y RGB YUV
4 CCIR 601 4:4:4 4:2:2 4:2:0 Y Y Y U V U V U V YUVUV UV 4:2:0 4:2:2
5 (RGB8 ) TV TV HDTV 352x x x Mbit/s 83Mbit/s 498Mbit/s
6 MC+DCT (20 ) DCT DCT + MC ( motion compensation) DCT ( discrete cosine transform) Q:
7 DCT +
8 DCT ( : 0.9 ) DCT ( ) ( )
9 DCT ρ=0.95 KLT: DCT: KLT 8x8 DCT
10 Wavelet ( ) x(n) h 0 (n) 2 h 0 (n) h 1 (n) 2 2 h 0 (n) h 1 (n) 2 2 LLL LLH LH h 1 (n) 2 H 2 LLL LLH LH H LL 0 π LH H
11 DCT Wavelet ρ=0.95 Wavelet DCT ( ) Wavelet: (JPEG-2000)
12 IP I P P P P P P I: I ( ) ( : 0.9 ) P: P ( )
13 IPB I B B P B B P I: I ( ) P: P ( ) ( ) B: B ( )
14 I B B P B B P TV (MPEG-2) DCT: DCT
15
16 () 1/4 1/8 :
17 :
18
19
20 H kb/s2Mb/s ISDN ITU-T H kb/s H kb/s H kb/s MPEG Mb/s CD-ROM ISO MPEG-2 * 1995 Mb/s MPEG kb/s * MPEG-2/H.262H.264 (MPEG-4 Part 10) ISO ITU-T
21 MC DCT ( ) MC+DCT B ITU-T H.120 Sub-rate H.261 H.263 / H M 384K 64K - 1.5M ISDN, Internet, Joint (ITU-T & ISO) MPEG-2 / H.262 DVDHDTV H.264 Internet, ISO MPEG-1 MPEG-4 CD-ROM Internet,
22 MC+DCT 1/2IPB H H MPEG MPEG-2 - H MPEG-4 H ( )
23 ISO/IEC MPEG-4
24 MPEG-4 ( ) ( ) ( ) (Wavelet )
25 MPEG-4 ( ) Hello Hello () ( )
26 (CIF, QCIF, ) (x, y) VOP (w, h)
27 MB (1) (2) (3) MB (1) I- DCT (2) P-0 DCT
28 (1) 2 (0,1) (2) (0, 255) (DCT) ( ) (R, G, B, A) (Y, U, V, A) A: ( ) A = 0: (transparent) A = 255: (opaque) A = 1 254: ( )
29 ITU-T H.264 (MPEG-4 Part 10)
30 H.264 (MPEG-4 70%) ( ) (Sub-macroblock prediction) 1/4 1/8 (1/4, 1/8 pel interpolation) (Multiframe prediction) (SAT: sum of absolute transformed differences) (Adaptive intra prediction) DCT (Adaptive block-size transform) CABAC (Context-based Adaptive Binary Arithmetic Coding) VCL: Video Coding Layer NAL: Network Adaptation Layer RTP Packetization
31 mode 1 16x16 block 1 vector mode 2 8x16 block 2 vectors mode 3 16x8 block 2 vectors mode 4 8x8 block 4 vectors mode 5 4x8 block 8 vectors mode 6 8x4 block 8 vectors mode 7 4x4 block 16 vectors Sub-macroblock prediction
32 P P P P P P Multi-frame prediction
33 SAT ( ( SAD minimization ( ) DCT SAD minimization (SAD DCT ) SAT minimization ( ) DCT SAT minimization ( ) SAD: sum of absolute differences, SAT: sum of absolute transformed differences
34 I A B C D E a b c d F e f g h G i j k l H m n o p mode 0: DC prediction mode 1: Vertical/Diagonal prediction mode 2: Vertical prediction mode 3: Diagonal prediction mode 4: Horizontal prediction mode 5: Horizontal/Diagonal prediction I A B C D E a b c d F e f g h 5 G i j k l H m n o p mode 0: = (A+B+C+D+E+F+G+H) / 8 mode 1: a = (A+B) / 2 e = B b = i = (B+C) / 2 f = m = C c = j = (C+D) / 2 d = g = h = k = l = n = o = p = D
35 CABAC (Binarization) A B C Binarization (unary) index 0 1 binarization 1 01 A, B: C: vs. ( ) Context-based Adaptive Binary Arithmetic Coding
36 ( CABAC 1015% 5% 5% 5% R-D ( ) 1015% 30%
37 Rate-Distortion Optimization Multiple Distortion Coding Wyner-Zip Coding
38 R-D Lagrange (Rate-Constrained minimize J = D + λ R (D, R) ( ) INTRA/INTER ( ) INTRA/INTER/SKIP ( ) ( ) (FastStreaming) Rate-Distortion Optimization for Video Compression, IEEE Signal Processing Magazine, Nov.1998.
39 R-D (DCT ) (1) J dj dr dd = dr + λ λ MODE = dd dr (2) b R( D) = a log2 D 2 (2Q) D = = 12 Q 3 2 (H.263) MODE (3) λ = c Q 2 MODE c 2 Q 3 λ = ln 2 c = 3 a 0.85 (H.264)
40 R-D RD D motion min J motion = Dmotion + λmotion Rmotion min ( ) D mode min J mode = Dmode + λmode Rmode min ( )
41 Multiple Description Coding ( ) () Temporal scalability: I B B P B B Multiple Description Coding: (descriptions)
42 Wyner-Ziv Coding Input (X) encode decode Output (Y) Distributed Source Coding (Wyner-Ziv Coding): Input (X) encode decode Y (= X+) p subencode subdecode Reconstruction Output (Y ) MAP Y ' = arg max P( X Y, p) p (sub-information)
43 H.264 LSI Logic, VLE4000: Sand Video (Broadcom), SV-D011: H.264 SDTV encoder (FPGA) H.264 HDTV decoder (core) H.264 SDTV decoder: NECELMP211 (DSP & 3CPU/ARM) Sony: PSP (HW core)cell RenesasSH-Mobile4 (HW core)
44 Qualcomm: MSM7000 NTT DoCoMo 1 2 (OMAP, SH-Mobile) RF-CMOS Jul G/3G WLAN ( ) Brew 1 3D-CG (ATI core) + TI (OMAP ext.) Renesas (SH-Mobile ext.)
45 ViXS Systems Inc. (MPEG & ) LSI XCode II Matrix ABFM ( ) MPEG-2/4 LSI SDTV 4 8 HDTV 1 ( ) HDD IEEE a/e LSI a/e 2 (54 * 2 = 108Mb/s) LAN HDTV MAC ( ) AV (e.g. HDD to ) (Adaptive Bandwidth Footprint Management) Matrix XCode II LAN
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画像情報特論 () ビデオ圧縮 : H.6/AVC ビデオ圧縮の基礎 情報ネットワーク専攻甲藤二郎 EMail: katto@waseda.jp ディジタルビデオ () 時間方向 空間方向のサンプリング CCIR 6 フォーマット ディジタルビデオ () カメラ ビデオキャプチャ :: :: :: フレーム Y Y Y RGB / YV 変換 フレーム周期 (/ 秒 ~) 時間 V V V R G
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![2. CABAC CABAC CABAC 1 1 CABAC Figure 1 Overview of CABAC 2 DCT 2 0/ /1 CABAC [3] 3. 2 値化部 コンテキスト計算部 2 値算術符号化部 CABAC CABAC](/thumbs/92/108208872.jpg "2. CABAC CABAC CABAC 1 1 CABAC Figure 1 Overview of CABAC 2 DCT 2 0/ /1 CABAC [3] 3. 2 値化部 コンテキスト計算部 2 値算術符号化部 CABAC CABAC")
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動 画 像 符 号 化 標 準 H.264/AVCに おける 高 性 能 VLSIの 開 発 宋 天 島 本 隆 徳 島 大 学 大 学 院 ソシオテクノサイエンス 研 究 部 情 報 ソリューション 部 門 計 算 機 システム 工 学 大 講 座 1 背 景 1997 年 ~2004 年 白 川 研 究 室 ( 大 阪 大 学 ) 2004 年 ~ 今 徳 島 大 学 來 山 研 究 室 助 教
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14 ( 式 1.4.2) p [0, -1] = (3*p[0, -1] + p[1, -1] + 2) >> 2 p [x, -1](x = 0,, 7) については ( 式 1.4.3) p [x, -1] = (p[x-1, -1] + 2*p[x, -1] + p[x+1, -1] + 2) >>2 p [x, -1](x = 8,, 15) については p[x, -1](x=8,, 15)
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HD-V9000 用コンテンツ制作マニュアル 1.20 パイオニア株式会社初版 2010 年 3 月改訂 2010 年 10 月 はじめに 本マニュアルでは 業務用 HD ビデオシステムプレーヤー HD-V9000 で運用するコンテンツの 制作上の注意点について解説しています 基本的ななコンテンツ制作の流れは以下の通りです 下記の各プロセスに対応した内容を 示しているページに記述しておりますので ご参照の上参考にしてください
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誤 り 訂 正 技 術 の 基 礎 サンプルページ この 本 の 定 価 判 型 などは, 以 下 の URL からご 覧 いただけます http://wwwmorikitacojp/books/mid/081731 このサンプルページの 内 容 は, 第 1 版 発 行 時 のものです http://wwwmorikitacojp/support/ e mail editor@morikitacojp
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HEVC 2012 (409825) 2016 [1][2] H.264/AVC HEVC HEVC Abstract As ultra high definition television is planning on test broadcasting 2016, moving picture resolution enhancement is advancing in recent years.