ISO/IEC 15938-9:2005 信息技术 多媒体内存描述界面 第10部分：模式定义
标准编号：ISO/IEC 15938-9:2005
中文名称：信息技术 多媒体内存描述界面 第10部分：模式定义
英文名称：Information technology — Multimedia content description interface — Part 9: Profiles and levels
发布日期：2005-04
标准范围
ISO/IEC 15938-9:20 05收集了在ISO/IEC 15938的所有部分中指定的MPEG-7的标准配置文件和级别。虽然所有部分都是用于配置文件的潜在候选，但是当前的配置文件集中于描述定义语言[ISO/IEC 15938-2]、视觉[ISO/IEC 15938-3]、音频[ISO/IEC 15938-4]、多媒体描述方案[ISO/IEC 15938-5]，它们基于模式定义[ISO/IEC 15938-10]中定义的命名空间版本。ISO/IEC 15938-9:20 05为描述配置文件和描述级别提供了一组定义良好的定义和处理规则，其中:描述配置文件提供了从MPEG-7模式中选择和约束描述工具的手段，从而在其内容中约束一致的描述。描述简档通常将描述工具的使用限制在MPEG中定义的描述工具的子集。7.描述简档中的描述工具支持用于某一类应用的一组功能。对于给定的描述简档，描述级别定义进一步的约束以限制符合描述的复杂性。此类约束可以是对所选描述工具的语法和/或语义的限制。例如，数据类型内的特定元素可以被排除在描述中出现。描述级别可以强制在描述中使用数据类型，并且还可以限制一致描述的大小。目前，ISO/IEC 15938-9:20 05标准化了以下简档:简单元数据简档(SMP)-描述了多媒体剪辑的单个实例的简单元数据标记。该配置文件可用于音乐、图像和移动应用等领域，仅举几例。用户描述简档(UDP)-描述多媒体内容用户的个人偏好和使用模式。用户偏好的描述使得能够自动发现、选择和推荐或记录多媒体内容。可以从用户先前的观看和收听习惯自动推断偏好，而用户先前的观看和收听习惯又可以从使用历史导出。目标是通过个性化支持各种多媒体设备的改进的可用性:提供给消费者的个性化多媒体服务，个性化多媒体内容发现、过滤和选择，以及多媒体内容的个性化消费。核心描述配置文件（CDP）-描述一般多媒体内容，如图像、视频、音频和集合。此外，还可以描述跨越各种媒体类型的内容集合。因此，该简档提供了一组核心工具，其可用于描述广泛应用的通用多媒体内容，例如通用多媒体创建、消费和分发、广播电视节目和教育课件，仅举几例。
ISO/IEC 15938-9:2005 collects standard profiles and levels for MPEG-7, specified across all parts of ISO/IEC 15938. While all parts are potential candidates for profiling, current profiles concentrate on the Description definition language [ISO/IEC 15938-2], Visual [ISO/IEC 15938-3], Audio [ISO/IEC 15938-4], Multimedia description schemes [ISO/IEC 15938-5], which are based on the namespace versioning defined in Schema definition [ISO/IEC 15938-10].
ISO/IEC 15938-9:2005 provides a set of well-defined definitions and processing rules for description profile and description level, where:
- A description profile provides a means of selecting and constraining description tools from the MPEG-7 schema, thereby constraining conforming descriptions in their content. A description profile generally limits the use of description tools to subsets of the description tools defined in MPEG-7. The description tools in a description profile support a set of functionalities for a certain class of applications.
- A description level defines further constraints to limit the complexity of conforming descriptions, for a given description profile. Such constraints may be restrictions on the syntax and/or semantics of the selected description tools. For example, a particular element within a data type may be excluded from occurring in descriptions. Description levels may mandate the usage of a data type in descriptions, and may also limit the size of conforming descriptions.
Currently, ISO/IEC 15938-9:2005 standardizes the following profiles:
- Simple Metadata Profile (SMP) - describes simple metadata tagging for single instances of multimedia clips. This profile can be used in the areas such as music, images and mobile applications, just to name a few.
- User Description Profile (UDP) - describes the personal preferences and usage patterns of users of multimedia content. Descriptions of users' preferences enable automatic discovery, selection and recommendation or recording of multimedia content. Preferences can be automatically inferred from the user's prior viewing and listening habits, which can in turn be derived from a usage history. The goal is to support improved usability of a variety of multimedia devices through personalization: personalized multimedia services offered to the consumer, personalized multimedia content discovery, filtering and selection, and personalized consumption of multimedia content.
- Core Description Profile (CDP) - describes general multimedia content such as images, videos, audio, and collections. Furthermore, content collections spanning various media types can also be described. As such, this profile provides a core set of tools that can be used to describe common multimedia content for a broad range of applications, such as general multimedia creation, consumption and distribution, broadcast television programming and educational courseware, just to name a few.
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