ISO/IEC 21000-17-2006 信息技术.多媒体框架(MPEG-21).第17部分:MPEG资源片断识别

标准号：ISO/IEC 21000-17-2006
中文标准名称：信息技术.多媒体框架(MPEG-21).第17部分:MPEG资源片断识别
英文标准名称：Information technology - Multimedia framework (MPEG-21) - Part 17: Fragment Identification of MPEG Resources
标准类型：L71;L81
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：L71;L81
国际标准分类号：35.040
适用范围：This International Standard is titled “Fragment Identification of MPEG Resources” and specifies a normativesyntax for URI Fragment Identifiers to be used for addressing parts of any resource whose Internet MediaType is one of:- audio/mpeg [RFC3003];- video/mpeg [RFC2045, RFC2046];- video/mp4 [RFC4337];- audio/mp4 [RFC4337];- application/mp4 [RFC4337].MPEG URI Fragment Identifier schemes offer comprehensive and flexible mechanisms for addressingfragments of audiovisual content. Therefore, their use may potentially be extended to other audiovisualInternet Media types.Such URI Fragment Identifiers are compliant to the generic syntax for URIs defined by IETF RFC 3986 andtherefore can be used after the “#” character in a URI. Where appropriate, such Fragment Identifiers can alsobe used in IRIs as specified by IETF RFC 3987.The syntax for URI Fragment Identifiers defined in this specification is based on the W3C XPointer FrameworkRecommendation and adds the ability to address:- temporal, spatial and spatiotemporal locations of a resource;- logical units of a resource according to a given Logical Model;- byte ranges of a resource;- items or Tracks of an ISO Base Media File;- a portion of a video through the use of a Mask.1.2 Organization of this documentThis International Standards provides firstly a set of generic principles for addressing fragments of multimediaresources. This set of principles is referred to as MPEG URI Fragment Identifier Framework (Figure 1) and isspecified in Clause 4.Secondly, this International Standards defines a set of normative pointer schemes to be used in the context ofthe MPEG URI Fragment Identifier Framework. These pointer schemes are specified in Clause 5.Finally, Clause 6 provides a set of tools for representing Logical Models for various types of media, in order toallow the addressing of fragments of content.This International Standards also provides illustrative (non-normative) examples.1.3 Relationship with the MPEG-21 FrameworkThe tools specified in this part of ISO/IEC 21000 allow identification of a part of a resource by providing aformat for referencing the part using a Fragment Identifier. The Fragment Identifiers defined in thisInternational Standards are distinct from the Digital Item Identifiers specified in ISO/IEC 21000-3 for identifyingthe “fundamental units of trade” within the MPEG-21 Multimedia Framework (i.e. Digital Items).