MHEG-5:修订间差异
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⚫ | '''MHEG-5'''(信息技术-多媒体和超媒体信息编码 第5部分, [[國際標準化組織|ISO]]/[[国际电工委员会|IEC]] IS 13522-5:1997),是展現[[多媒體]]和[[超媒體]]內容的國際技術標準,由「多媒體超媒體標準專家組織」(Multimedia and Hypermedia Experts Group, MHEG)制訂,最常用於提供[[互動電視]]服務。MHEG-5與另一個[[互動電視]]技術[[MHP]]的分別,在於MHEG-5所需的[[中央處理器|CPU]]的[[MIPS]]數值和[[記憶體]]遠比MHP為少,[[中間件]]和[[數位視訊轉換盒|機頂盒]]的成本亦較MHP便宜,而且完全不需要支付授權費。<ref name="#1">{{Cite web |url=http://www.dtvc.org.tw/Detail.asp?num=387 |title=授權費全免 MHEG-5力爭互動電視市場 |accessdate=2008-05-11 |archive-date=2008-06-28 |archive-url=https://web.archive.org/web/20080628234235/http://www.dtvc.org.tw/Detail.asp?num=387 |dead-url=no }}</ref> |
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{{Translating |time=2007-12-20T10:20:16+00:00 }}<!-- 本调用由 {{subst:Translating/auto}} 自动产生。 --> |
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MHEG-5在[[英國]]和[[新西蘭]]的免費電視台和香港的[[無綫電視]]皆有選用<ref>{{Cite web |url=http://www.tvb.com/affairs/faq/press/20071128.html |title=要享受TVB互動功能服務 MHEG-5中間件為必然之選 |accessdate=2007-12-20 |archive-date=2007-12-01 |archive-url=https://web.archive.org/web/20071201192333/http://www.tvb.com/affairs/faq/press/20071128.html |dead-url=no }}</ref>,而[[中華民國|台灣]]、[[新加坡]]、[[馬來西亞]]、[[印度]]、[[土耳其]]、[[愛爾蘭]]和[[俄羅斯]]等地亦正在對MHEG-5技術進行測試和評估。<ref name="#1"/> |
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⚫ | '''MHEG-5'''(信息技术-多媒体和超媒体信息编码 第5部分,[[國際標準化組織| |
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*[[電視資訊|Teletext]]:相關服務之前身 |
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{{TransH}} |
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==特點== |
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which can be used to describe a presentation of text, images and video. An MHEG-5 application consists of a number of ''Scenes'' which the user of the application can move between. Each ''Scene'' lists the items of text and graphics to be presented and can contain blocks of [[procedural programming|procedural]] code which are executed in response to one of a predefined set of [[event driven programming|events]] such as keys being pressed, timers firing or content being successfully loaded into memory. These blocks of code consist of ''elementary actions'' which can perform operations such as changing the text displayed by a text [[object (computer science)|object]], or starting a video clip playing. |
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MHEG-5 specifies a hierarchy of classes that are available to the application author. Unlike in [[object oriented]] languages, it is not possible for new classes to be defined. The standard defines two representations of MHEG applications, one of which is textual and the other is represented in [[Abstract Syntax Notation One|ASN.1]]. Applications are normally written in the textual notation and then encoded into ASN.1 for interpretation by the MHEG ''engine''. |
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MHEG-5 is suited to programming [[interactive kiosk|interactive kiosks]] and [[interactive television]] services. |
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==Profiles== |
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The MHEG-5 language itself is just that, a language. To be useful in any particular context, the language needs to be [[profile (engineering)|profiled]]. |
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In the [[UK]] and in [[New Zealand]], MHEG-5 is used to provide [[interactive television|interactive]] services for digital television. The full specification of how MHEG-5 is used in the context of the UK [[Freeview]] platform is the [[UK Profile of MHEG-5]]. A similar specification is used in New Zealand. |
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A broadcast profile of the language has also been standardized by [[ETSI]] forming ETSI standard ES 202 184. |
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{{TransF}} |
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{{Reflist}} |
{{Reflist}} |
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==外部連結== |
== 外部連結 == |
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* [http://www.mheg.org MHEG 官方網頁] |
* [http://www.mheg.org MHEG 官方網頁] {{Wayback|url=http://www.mheg.org/ |date=20200223191939 }} |
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* [ |
* [https://web.archive.org/web/20150801161946/http://impala.org/ IMPALA (International MHEG Promotion Alliance)] |
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* [http://www.digvid.info/mheg5/hello_world.php Hello World in MHEG-5] |
* [http://www.digvid.info/mheg5/hello_world.php Hello World in MHEG-5] {{Wayback|url=http://www.digvid.info/mheg5/hello_world.php |date=20200127101208 }} |
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* [http://lionet.info/asn1c/download.html ASN.1 encoder/decoder + source code] |
* [http://lionet.info/asn1c/download.html ASN.1 encoder/decoder + source code] {{Wayback|url=http://lionet.info/asn1c/download.html |date=20201111195557 }} |
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* [http://redbutton.sourceforge.net/ Open Source MHEG-5 engine for Linux] |
* [http://redbutton.sourceforge.net/ Open Source MHEG-5 engine for Linux] {{Wayback|url=http://redbutton.sourceforge.net/ |date=20210108172956 }} |
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* [https://web.archive.org/web/20070320214115/http://www.creation-digital.jp/ CREATION DTTR-2008PLUS , DTTR-1338N 已支援MHEG-5 互動功能] |
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[[category:影像科技]] |
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[[category:電腦圖形]] |
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[[category:電腦術語]] |
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[[Category:互动电视]] |
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[[de:MHEG]] |
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[[ |
[[Category:IEC標準]] |
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[[ |
[[Category:ISO標準]] |
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[[ |
[[Category:超媒体]] |
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2024年2月10日 (六) 15:35的最新版本
MHEG-5(信息技术-多媒体和超媒体信息编码 第5部分, ISO/IEC IS 13522-5:1997),是展現多媒體和超媒體內容的國際技術標準,由「多媒體超媒體標準專家組織」(Multimedia and Hypermedia Experts Group, MHEG)制訂,最常用於提供互動電視服務。MHEG-5與另一個互動電視技術MHP的分別,在於MHEG-5所需的CPU的MIPS數值和記憶體遠比MHP為少,中間件和機頂盒的成本亦較MHP便宜,而且完全不需要支付授權費。[1]
MHEG-5在英國和新西蘭的免費電視台和香港的無綫電視皆有選用[2],而台灣、新加坡、馬來西亞、印度、土耳其、愛爾蘭和俄羅斯等地亦正在對MHEG-5技術進行測試和評估。[1]
參見
[编辑]注釋
[编辑]- ^ 1.0 1.1 授權費全免 MHEG-5力爭互動電視市場. [2008-05-11]. (原始内容存档于2008-06-28).
- ^ 要享受TVB互動功能服務 MHEG-5中間件為必然之選. [2007-12-20]. (原始内容存档于2007-12-01).