56:(DID) is a document that specifies the makeup, structure and organisation of a Digital Item. The purpose of the Digital Item Declaration is to describe a set of abstract terms and concepts, to form a useful model for defining what a Digital Item is. Following this model, a Digital Item is the digital representation of an object, which is managed, described or exchanged within the model.
103:
72:
110:
Mainly, the key element is to achieve transparent access to distributed advanced multimedia content, by avoiding users from doing network and terminal installation, management and implementation. This will enable the provision of network and terminal resources on demand to form user communities where
86:
The elements of a DID can have zero, one or more descriptors; each descriptor may contain a statement which can contain an identifier relating to the parent element of the statement. Besides the references to the resources, a DID can include information about the item or its parts. On the left, there
123:
At this point, we know that a
Digital Item can be a complex collection of information. Both still and dynamic media can be included, for example: images and movies; as well as Digital Item information, metadata, layout information, and so on. It can also include both textual data, XML for instance,
79:
Digital Item
Identification (DII) specification includes not only how to identify Digital Items uniquely but also to distinguish different types of them. These Identifiers are placed in a specific part of the Digital Item Declaration, which is the statement element, and they are associated with
114:
Towards this objective the adaptation of
Digital Items is required. As shown in the next conceptual schema, a Digital Item is subject to a descriptor adaptation engine, as well as a resource adaptation engine, which produce together the adapted Digital Item.
83:
Digital Items and their parts are identified by encapsulating uniform resource identifiers, which are a compact string of characters for identifying an abstract or physical resource.
49:
MPEG-21 proposes to facilitate a wide range of actions involving
Digital Items so there is a need for a very precise description for defining exactly what constitutes such an item.
41:
rights that are associated with the elements of multimedia content. For this reason, new solutions are required for the access, delivery, management and protection of this content.
195:
ISO/IEC 21000-9 First edition, 2005-07-01, AMENDMENT 1 2008-10-01, Information technology — Multimedia framework (MPEG-21) — Part 9: File Format AMENDMENT 1: MIME type registration
135:
and designed to contain a base MPEG-21 XML document with some or all of its ancillary resources, potentially in a single package. It uses filename extension
481:
90:
It is necessary for DII to allow differentiating between the different schemas that users can use to describe their content. MPEG-21 DII uses the
697:
193:
646:
579:
537:
234:
61:
636:
243:
167:
111:
multimedia content can be created and shared, always with the agreed/contracted quality, reliability and flexibility.
558:
496:
132:
34:, such as descriptors and identifiers; and structure for describing the relationships between the resources.
678:
662:
521:
486:
447:
425:
398:
372:
38:
131:
The MPEG-21 Part 9 specification (ISO/IEC 21000-9) defined the MPEG-21 File Format. It is based on the
180:
168:
ISO/IEC 21000-9:2005 - Information technology -- Multimedia framework (MPEG-21) -- Part 9: File Format
631:
420:
367:
410:
403:
346:
227:
435:
516:
322:
641:
511:
506:
501:
491:
24:
212:
37:
It is becoming difficult for users of content to identify and interpret the different
30:
A Digital Item may be a combination of resources like videos, audio tracks or images;
716:
710:
574:
476:
463:
415:
220:
87:
is a visual example about the metadata that a music album could have in MPEG-21.
31:
279:
102:
20:
615:
610:
605:
600:
595:
442:
327:
317:
303:
295:
284:
274:
269:
264:
259:
254:
125:
27:, including a standard representation, identification and metadata.
683:
469:
357:
144:
216:
71:
60:
430:
377:
91:
596:
Part 1: Transport and
Storage of Genomic Information
692:
671:
655:
624:
588:
567:
546:
530:
456:
388:
336:
684:Part 2: Low Complexity Enhancement Video Coding
228:
8:
637:Part 2: High Efficiency Video Coding (H.265)
647:Part 12: High Efficiency Image File Format
235:
221:
213:
181:MPEG-21 File Format white paper - Proposal
101:
70:
19:is the basic unit of transaction in the
580:Part 3: Unified Speech and Audio Coding
538:Part 2: Description definition language
159:
663:Part 3: Versatile Video Coding (H.266)
487:Part 10: Advanced Video Coding (H.264)
601:Part 2: Coding of Genomic Information
106:Schema of the Digital Item adaptation
7:
497:Part 12: ISO base media file format
244:MPEG (Moving Picture Experts Group)
559:Part 5: Rights Expression Language
128:presentation or a still picture.
14:
75:Visual example of a Digital Item
59:
679:Part 1: Essential Video Coding
554:Parts 2, 3 and 9: Digital Item
522:Part 33: Internet Video Coding
507:Part 17: Streaming text format
23:framework. It is a structured
1:
448:Part 7: Advanced Audio Coding
632:Part 1: MPEG media transport
67:Digital Item Identification
733:
611:Part 4: Reference Software
492:Part 11: Scene description
395:Part 1: Systems (H.222.0)
133:ISO base media file format
517:Part 22: Open Font Format
250:
183:, Retrieved on 2009-08-14
170:, Retrieved on 2009-08-15
124:and binary data, like an
502:Part 14: MP4 file format
54:Digital Item Declaration
45:Digital Item Declaration
642:Part 3: MPEG-H 3D Audio
98:Digital Item Adaptation
107:
94:mechanism to do this.
76:
575:Part 1: MPEG Surround
411:Part 2: Video (H.262)
105:
74:
39:intellectual property
616:Part 5: Conformance
108:
77:
704:
703:
436:MPEG Multichannel
179:ISO (April 2006)
724:
399:Transport stream
343:Part 1: Systems
237:
230:
223:
214:
208:
207:
206:
205:
200:
190:
184:
177:
171:
164:
149:application/mp21
63:
732:
731:
727:
726:
725:
723:
722:
721:
707:
706:
705:
700:
688:
667:
651:
620:
584:
563:
542:
526:
452:
384:
332:
246:
241:
211:
203:
201:
198:
192:
191:
187:
178:
174:
165:
161:
157:
121:
100:
80:Digital Items.
69:
47:
12:
11:
5:
730:
728:
720:
719:
709:
708:
702:
701:
696:
694:
690:
689:
687:
686:
681:
675:
673:
669:
668:
666:
665:
659:
657:
653:
652:
650:
649:
644:
639:
634:
628:
626:
622:
621:
619:
618:
613:
608:
603:
598:
592:
590:
586:
585:
583:
582:
577:
571:
569:
565:
564:
562:
561:
556:
550:
548:
544:
543:
541:
540:
534:
532:
528:
527:
525:
524:
519:
514:
512:Part 20: LASeR
509:
504:
499:
494:
489:
484:
479:
474:
473:
472:
460:
458:
454:
453:
451:
450:
445:
443:Part 6: DSM CC
440:
439:
438:
433:
428:
423:
413:
408:
407:
406:
404:Program stream
401:
392:
390:
386:
385:
383:
382:
381:
380:
375:
370:
364:Part 3: Audio
362:
361:
360:
353:Part 2: Video
351:
350:
349:
347:Program stream
340:
338:
334:
333:
331:
330:
325:
320:
315:
312:
309:
306:
301:
298:
293:
290:
287:
282:
277:
272:
267:
262:
257:
251:
248:
247:
242:
240:
239:
232:
225:
217:
210:
209:
185:
172:
158:
156:
153:
120:
117:
99:
96:
68:
65:
46:
43:
25:digital object
13:
10:
9:
6:
4:
3:
2:
729:
718:
715:
714:
712:
699:
695:
691:
685:
682:
680:
677:
676:
674:
670:
664:
661:
660:
658:
654:
648:
645:
643:
640:
638:
635:
633:
630:
629:
627:
623:
617:
614:
612:
609:
607:
604:
602:
599:
597:
594:
593:
591:
587:
581:
578:
576:
573:
572:
570:
566:
560:
557:
555:
552:
551:
549:
547:MPEG-21 Parts
545:
539:
536:
535:
533:
529:
523:
520:
518:
515:
513:
510:
508:
505:
503:
500:
498:
495:
493:
490:
488:
485:
483:
480:
478:
477:Part 3: Audio
475:
471:
467:
466:
465:
464:Part 2: Video
462:
461:
459:
455:
449:
446:
444:
441:
437:
434:
432:
429:
427:
424:
422:
419:
418:
417:
416:Part 3: Audio
414:
412:
409:
405:
402:
400:
397:
396:
394:
393:
391:
387:
379:
376:
374:
371:
369:
366:
365:
363:
359:
355:
354:
352:
348:
345:
344:
342:
341:
339:
335:
329:
326:
324:
321:
319:
316:
313:
310:
307:
305:
302:
299:
297:
294:
291:
288:
286:
283:
281:
278:
276:
273:
271:
268:
266:
263:
261:
258:
256:
253:
252:
249:
245:
238:
233:
231:
226:
224:
219:
218:
215:
197:
196:
189:
186:
182:
176:
173:
169:
163:
160:
154:
152:
150:
146:
142:
138:
134:
129:
127:
118:
116:
112:
104:
97:
95:
93:
88:
84:
81:
73:
66:
64:
62:
57:
55:
50:
44:
42:
40:
35:
33:
28:
26:
22:
18:
672:MPEG-5 Parts
656:MPEG-I Parts
625:MPEG-H Parts
606:Part 3: APIs
589:MPEG-G Parts
568:MPEG-D Parts
553:
531:MPEG-7 Parts
482:Part 6: DMIF
457:MPEG-4 Parts
389:MPEG-2 Parts
337:MPEG-1 Parts
202:, retrieved
194:
188:
175:
162:
148:
140:
136:
130:
122:
113:
109:
89:
85:
82:
78:
58:
53:
51:
48:
36:
29:
17:Digital Item
16:
15:
119:File Format
204:2010-08-20
155:References
698:MPEG-DASH
468:based on
431:Layer III
378:Layer III
356:based on
711:Category
426:Layer II
373:Layer II
32:metadata
421:Layer I
368:Layer I
21:MPEG-21
255:MPEG-1
126:MPEG-4
693:Other
470:H.263
358:H.261
199:(PDF)
147:type
141:.mp21
717:MPEG
166:ISO
145:MIME
143:and
137:.m21
139:or
92:XML
713::
280:21
151:.
52:A
328:5
323:I
318:H
314:U
311:M
308:V
304:G
300:E
296:D
292:C
289:B
285:A
275:7
270:4
265:3
260:2
236:e
229:t
222:v
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
