This part of ISO\/IEC 16500 takes a practical approach to the specification of Information Representation. Just the<\/p>\n
information types that cannot be dispensed with in producing the set of DAVIC applications (viz. broadcast, movies<\/p>\n
on demand, home shopping, etc.) are specified. The approach taken in this part of ISO\/IEC 16500 starts by defining<\/p>\n
the various monomedia information types. They include character, text, fonts, service information, audio, video, and<\/p>\n
graphics. Consistent with DAVIC principles, one tool is selected for the encoding of each information type.<\/p>\n
Multimedia components comprise one or more monomedia components. This part of ISO\/IEC 16500 defines the way<\/p>\n
in which multimedia information is coded and exchanged. This includes the definition of a virtual machine and a set<\/p>\n
of APIs to support interoperable exchange of program code. Finally, this part of ISO\/IEC 16500 defines a Reference<\/p>\n
Decoder Model for contents decoding which provides constraints on content. The major problem addressed by the<\/p>\n
model is to ensure interoperability of applications by specifying memory and behaviour constraints for contents<\/p>\n
decoding by a hypothetical STU, without specifying the internal design of an STU. An application built according to<\/p>\n
the reference decoder model will be an "ISO\/IEC 16500 conforming application" and will successfully execute on a<\/p>\n
STU that is compliant to ISO\/IEC 16500.<\/p>\n
For each monomedia and multimedia component the coding format is specified, as well as applicable constraints for<\/p>\n
coding of the components. Three types of monomedia components are distinguished. Monomedia components which<\/p>\n
are included within other monomedia components, such as characters within text, are of type implied. Non-implied<\/p>\n
monomedia components that do not require synchronization with a time base at play back, are of type stand-alone.<\/p>\n
Finally, non-implied monomedia components of which the presentation may require synchronization with a time base<\/p>\n
are of type stream. This part of ISO\/IEC 16500 defines which type each DAVIC defined monomedia component may<\/p>\n
take, and specifies that the coded representation of monomedia components of type stream are packetized in PES<\/p>\n
packets (for definition of PES packets refer to ISO\/IEC 13818-1). PES packets permit (1) to include time stamps to<\/p>\n
support mutual synchronisation of multiple monomedia components in reference to a common time base and (2) to<\/p>\n
define timing and buffer behaviour in a common reference model for contents decoding. While there are various<\/p>\n
ways to deliver the monomedia and multimedia components to the STU, This part of ISO\/IEC 16500 defines how the<\/p>\n
components are carried in an MPEG-2 Transport Stream.<\/p>\n
DAVIC specifies a number of different profiles. In a specific profile there may be support of a subset of the<\/p>\n
monomedia components. Each STU that complies to a specific profile of DAVIC shall be capable of decoding and<\/p>\n
presenting each monomedia and multimedia component permitted within that profile.<\/p>\n
This part of ISO\/IEC 16500 also specifies methods for packaging of contents and metadata. The way in which<\/p>\n
content is packaged for delivery is independent of the way in which content data is delivered to the SPS (it may be<\/p>\n
delivered to a Service Provider either on physical media or over a transmission system). All programming content is<\/p>\n
represented in the DAVIC system as multimedia components. Multimedia components comprise one or more<\/p>\n
monomedia components coupled with the logical relationships between the monomedia components. The multimedia<\/p>\n
components will be created by content providers for input to the servers.<\/p>\n","protected":false},"excerpt":{"rendered":"
Information technology \u2014 Generic digital audio-visual systems \u2014 Part 6: Information representation<\/b><\/p>\n\n\n
\n Published By<\/td>\n Publication Date<\/td>\n Number of Pages<\/td>\n<\/tr>\n \n ISO<\/b><\/a><\/td>\n 1999-12<\/td>\n 206<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":633458,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[661,2634],"product_tag":[],"class_list":{"0":"post-633445","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-35-040-40","7":"product_cat-iso","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/633445","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/633458"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=633445"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=633445"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=633445"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}