MHEG-5
MHEG-5 is an international standard about the expression of the multimedia information; joint committee ISO/IEC JTC 1/SC 29/WG 12 (Multimedia and Hypermedia Experts Group of ISO and IEC … I was standardized as ISO/IEC 13,522-5 by MHEG). The Japanese correspondence standard is JIS X 4345. The interactive program service is used as a language to describe mainly.
Table of contents
Characteristic
It is an object-oriented / declaration type programming language, and MHEG-5 is used to describe a text, an image, the presentation method of the animation. The MHEG-5 application consists of plural "scenes, scene", and the user becomes the form moving between the scenes. Each scene is comprised of the procedure cord which you should carry out as a reaction to an event defined as the list of elements of a text and the graphic which you should display in advance. An event includes the pressing of the key, the time-out of the timer, road completion to the memory of contents. The cord assumes "basic movement, elementary actions" an element. As basic movement, there is movement to start movement to change the text displayed in a text object, reproduction of the video clip.
There is the class hierarchy that an application developer can use in MHEG-5. Unlike an object oriented programming language, I cannot define the new class. I define two kinds of MHEG application expression by default. One is text expression and is expression by ASN.1 one more. Application is usually written by text expression, and I am encoded in ASN.1 by an MHEG engine.
MHEG-5 is suitable for the programming such as interactive program services.
Profile
MHEG-5 language in itself is a simple language. It is necessary to make a language a profile to use it in specific context.
In the U.K. and the New Zealand, MHEG-5 is used to provide the interactive program service of the digital television. How to use MHEG-5 in the context of the Freeview platform in the U.K. is prescribed as UK Profile of MHEG-5. The New Zealand has similar rule.
In Hong Kong, 無綫電視 chose MHEG-5 middleware for the interactive service with the digital broadcasting channel [1].
The broadcast profile of the MHEG-5 language is standardized as ETSI standard ES 202 184 by ETSI.
In Japan, adoption by the data broadcasting of the BS digital was considered, but was not adopted after all.
Allied item
- MHP - standard to conflict
Footnote
Outside link
This article is taken from the Japanese Wikipedia MHEG-5
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