mpeg4概論(完整版)
【正文】 ecoder resource limitations, such as Inter use and software decoding. MPEG4的 Profiles ? Visual Profiles ? The Simple Visual Profile ? The Simple Scalable Visual Profile ? The Core Visual Profile ? The Main Visual Profile ? The NBit Visual Profile ? (其他的是用在合成影像上 的 Profiles) ? Audio Profiles ? Graphics Profiles ? Scene Graph Profiles ? MPEGJ Profiles ? Object Descriptor Profile ? adds support for coding of arbitraryshaped and temporally scalable objects to the Simple Visual Profile. It is useful for applications such as those providing relatively simple contentinteractivity (Inter multimedia applications). MPEG4的 Profiles ? Visual Profiles ? The Simple Visual Profile ? The Simple Scalable Visual Profile ? The Core Visual Profile ? The Main Visual Profile ? The NBit Visual Profile ? (其他的是用在合成影像上 的 Profiles) ? Audio Profiles ? Graphics Profiles ? Scene Graph Profiles ? MPEGJ Profiles ? Object Descriptor Profile ? adds support for coding of interlaced, semitransparent, and sprite objects to the Core Visual Profile. It is useful for interactive and entertainmentquality broadcast and DVD applications. MPEG4的 Profiles ? Visual Profiles ? The Simple Visual Profile ? The Simple Scalable Visual Profile ? The Core Visual Profile ? The Main Visual Profile ? The NBit Visual Profile ? (其他的是用在合成影像上 的 Profiles) ? Audio Profiles ? Graphics Profiles ? Scene Graph Profiles ? MPEGJ Profiles ? Object Descriptor Profile ? adds support for coding video objects having pixeldepths ranging from 4 to 12 bits to the Core Visual Profile. It is suitable for use in surveillance applications. ? MPEG4的目標(biāo) ? MPEG4重要定義 –「 Media Object」 ? 實例說明 MPEG4物件概念、場景 (scene)的運作方式 ? 和傳輸無關(guān)的 MPEG4重要功能 (functions) ? 深入介紹 MPEG4的 function – Binary Format for Scene description （ BIFS） ? MPEG4編碼流程圖 ? MPEG4的 Profiles ? MPEG4 的 File Format ? MPEG4 System的傳輸 ? MPEG4的其他重要能力 ? MPEG4的版本關(guān)係 ? Summary 重要觀念整理 MPEG4 File Format（目標(biāo)） ? flexible, extensible format which facilitates interchange, management, editing, and presentation of the media MPEG4 File Format（範(fàn)例） ? The MP4 file format is posed of objectoriented structures called ?atoms? ? Most atoms describe a hierarchy of metadata giving information
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