【正文】 y in the same stream of past MPEG Video Coding standards (AVC and prior standards) 技術(shù)上使用與 MPEG 以前的視頻編碼標(biāo)準(zhǔn) (AVC 及以前標(biāo)準(zhǔn) ) 相同的傳送流 ? Currently at Committee Draft level 目前處于委員會(huì)草案的階段 MPEG for the past, present and future of TV 13 2023/05/08 HEVC vs AVC Subjective Performance Measurements HEVC 和 AVC 主觀性能測試的對(duì)比 ? Preliminary subjective tests carried out for HEVC Committee Draft 對(duì) HEVC 委員會(huì)草案已進(jìn)行 初步的 主觀測試 ? Reasonably small and nonoverlapping confidence intervals 合理較小的和不重疊的信任度間隔 ? Average rate savings at same (interpolated) MOS points 在相同的 (內(nèi)插的 ) MOS (評(píng)分平均 ) 點(diǎn)，得出可節(jié)省的平均比特率 ? HEVC with 67% lower rate in class B (Full HD) 在 B 類 (全高清 ) 中 HEVC 的比特率要低 67 % ? HEVC with 49% lower rate in class C (WVGA) 在 C 類 (WVGA) 中 HEVC 的比特率要低 49 % ? HEVC with 58% lower rate overall HEVC 整體比特率要低 58 % 2023/05/08 MPEG for the past, present and future of TV 14 A performance sample 一個(gè)性能樣本 2023/05/08 MPEG for the past, present and future of TV 15 For those technology aware? 涉及的有關(guān)技術(shù) ? ? Blockbased/Variable block sizes 基于塊的 /可變塊尺寸 ? Block motion pensation 塊的運(yùn)動(dòng)補(bǔ)償 ? Fractionalpel motion vectors 分像素的運(yùn)動(dòng)矢量 ? Spatial intra prediction 空間域的幀內(nèi)預(yù)測 ? Spatial transform of residual difference 殘差值的空間域變換 ? Integerbased transform designs 基于整數(shù)的各種變換設(shè)計(jì) ? Arithmetic or VLCbased entropy coding 基于算術(shù)的或變字長編碼的熵編碼 ? Inloop filtering to form final decoded picture 環(huán)內(nèi)的濾波處理以形成最終的解碼圖像 2023/05/08 MPEG for the past, present and future of TV 16 Where we are (May 2023) 我們身處何處 (2023 年 5 月 ) ? Activity: level of 1,000 documents per meeting crossed 活動(dòng)：每次會(huì)議審議約 1,000 個(gè)文件 ? Very diverse participation from industry/academia 工業(yè)界和學(xué)術(shù)界的極廣泛參加 ? Significant technical advance over prior standards 與過去的各種標(biāo)準(zhǔn)相比，已有顯著的技術(shù)進(jìn)步 ? Challenge: putational/implementation plexity 挑戰(zhàn)：計(jì)算 /實(shí)現(xiàn)的復(fù)雜度 ? Deliverables: 可發(fā)布的： ? Spec 技術(shù)規(guī)范 ? Reference software 參考軟件 ? Conformance 符合性 ? Currently only one profile 目前只有一個(gè)檔次 2023/05/08 MPEG for the past, present and future of TV 17 HEVC Scalability Extensions/1 HEVC 可伸縮性擴(kuò)展 /1 ? Serve the needs of heterogeneous environment of future digital TV distribution 服務(wù)于未來數(shù)字電視分發(fā)的異構(gòu)環(huán)境之各種需求 ? Multiple devices: SHDTVs, settop boxes, tablets, smart phones, PCs etc. 多類設(shè)備：超高清電視機(jī)，機(jī)頂盒，平板電腦，智能手機(jī)，個(gè)人電腦等 ? Wide range of processing powers, display sizes and power consumption needs 較寬范圍的處理能力、顯示器尺寸和功耗需求 ? Multiple works: Cable, Satellite, Terrestrial, CDN, Cable Modem, xDSL, WiFi, 4G 多類網(wǎng)絡(luò)：有線、衛(wèi)星、地面、有線數(shù)字網(wǎng)絡(luò)、有線調(diào)制解調(diào)器， xDSL， WiFi， 4G ? Wide range of channel bandwidths and QoS 較寬范圍的各種信道帶寬和服務(wù)質(zhì)量 ? Multiple protocols (多類協(xié)議 ): MPEG2 TS, DASH, HLS, RTP, UDP ? Multiple services: Broadcasting, On demand, Streaming, Over The Top 多類服務(wù)：廣播，點(diǎn)播，媒體流、三網(wǎng)融合 2023/05/08 MPEG for the past, present and future of TV 18 HEVC Scalability Extensions/2 HEVC 可伸縮性的擴(kuò)展 /2 ? Options for backward patible migration paths 用于向后兼容的遷移途徑之各種可選項(xiàng) ? From 720p60 to 1080p60 從 720p60 到 1080p60 ? From1080p60 to 4kx2kp60 從 1080p60 到 4kx2kp60 ? From AVC to HEVC 從 AVC 到 HEVC ? Time Line 時(shí)間表 ? May 2023 Preliminary Call for Proposals (public) 2023 年 5 月，初次征求提案（公開） ? July 2023 Final Call for Proposals (public) 2023 年 7 月，最終征求提案（公開） ? October 2023 2023 年 10 月 ? Evaluation of proposals start of collaborative design phase 評(píng)估各種提案，并開始合作設(shè)計(jì)階段 ? Development of the time line associated with standardisation phases (WD, CD/PDAM, FDIS/FDAM, DIS/AMD) 按照標(biāo)準(zhǔn)化程序，設(shè)定執(zhí)行時(shí)間表 2023/05/08 MPEG for the past, present and future of TV 19 Service Transitions 服務(wù)的過渡 ? 1950s: Color TV 1950 年代：彩色電視 ? Analog, backward patible 模擬的，向后兼容 ? 1990s: Digital TV 1990 年代：數(shù)字電視 ? New infrastructure required 需要新的基礎(chǔ)設(shè)施 ? Transitions from SD to HD 從標(biāo)清過渡到高清 ? 2023s: 3D 2023 年代：三維電視 ? Mixed results from services introduction is 各種服務(wù)的導(dǎo)入所形成的各種混合結(jié)果 ? Not a single format across all services 已不再是各種服務(wù)使用的單一格式 2023/05/08 MPEG for the past, present and future of TV 20 Current Status of 3D Video 三維視頻的現(xiàn)狀 ? Increasing investments in 3D production and services 對(duì) 3D 制作和服務(wù)的投資日益增長 ? Increasingly capable 3D displays in the market (many peting and emerging technologies) 市場上的 3D 顯示器日益增長 (大量競爭的和融合的技術(shù) ) ? Market is primarily stereo (mix of different formats being deployed right now) 市場上主要是雙目立體的 (不同格式的混合，目前正在部署中 ) ? Focus of current MPEG work: development of a new 3D format and associated pression techniques that could facilitate generation of multiview output 當(dāng)前 MPEG 工作的重點(diǎn)：設(shè)定一個(gè)新的 3D 格式及相應(yīng)的壓縮技術(shù)，以支持多視輸出的生成 2023/05/08 MPEG for the past, present and future of TV 21 L e f t V i e w R i g h t Vi e wEf f e ct i v e p re d i ct i o n b e t w e e n vi e w s f o r h i g h c o mp re ssi o n p e rf o rma n c eExisting 3DV Coding Formats 現(xiàn)有三維視頻編碼的各種格式 ? Pack pixels from left and right views into a single frame (loss of resolution) 把來自左視和右視的各像素，拼接進(jìn)單個(gè)圖像幀（分辨率下降） ? Leverage existing infrastructure and equipment, only require additional signaling to deinterleave frame 權(quán)衡現(xiàn)有的基礎(chǔ)設(shè)施，并只需對(duì)圖像幀增加 “去交織” 信令 ? Embraced by broadcasters for first phase of 3D broadcast services 在 3D 電視廣播的第一階段受到廣播業(yè)者歡迎 ? Fullresolution coding of stereo and MV video as extension of AVC 雙視和多視的視頻之全分辨率編碼是 AVC 的擴(kuò)展 ? High coding efficiency achieved via interview prediction techniques 通過視間預(yù)測技術(shù)獲得更高的編碼效率 ? 2D patibility supported能夠兼容二維 (2D) 電視 ?