1. The Ogg Bitstream Format Ogg ビット列形式

The Ogg Bitstream format has been developed as a part of a larger project aimed at creating a set of components for the coding and decoding of multimedia content (codecs) which are to be freely available and freely re-implementable both in software and in hardware for the computing community at large, including the Internet community.

Ogg ビット列書式は、を含むに向けた、ソフトウェア及びハードウェアのどちらでも自由に利用可能で自由に実装可能な、内容の符号化及び復号部品 (codec) の集合を作成することを目的とした上位の計画の一部として開発されています。

Raw packets from these codecs may be used directly by transport mechanisms that provide their own framing and packet-separation mechanisms (such as UDP datagrams).

これらの codec のは、自身の及び分離の機構を持つ転送機構 (例えば UDP ) では直接使用することが出来ます。

One such framing and content-separation mechanism is the real-time transport protocol (RTP). RTP allows the streaming of synchronous lossy data for broadcasting and similar purposes. If this function is desired then a separate RTP wrapping mechanism should be used. A wrapping mechanism is currently under development.

そのような及び内容分離の機構は、転送 (RTP) です。 RTP を使うと放送や同様の目的のための同期データのを行うことができます。この機能が望ましい時には、分離 RTP 機構を使用するべきです。機構は現在開発中です。

For stream based storage (such as files) and transport (such as TCP streams or pipes), Ogg codecs use the Ogg Bitstream Format to provide framing/sync, sync recapture after error, landmarks during seeking, and enough information to properly separate data back into packets at the original packet boundaries without relying on decoding to find packet boundaries. The application/ogg MIME type refers to this kind of bitstreams, when no further knowledge of the bitstream content exists.

(のような) を基にしたと (TCP やのような) 転送では、 Ogg codec は、境界を探すために復号すること無しに元の境界でデータを適切に分離するための /同期, 語の同期再, 探索中の目印付け及び十分な情報を提供するために Ogg ビット列形式を使います。 application/ogg MIME は、ビット列内容についての更なる知識が存在しない時にこの種のビット列を参照します。

The bitstream format in itself is documented in [1].

ビット列形式自体は [1] で文書化されています。

2. Registration Information 登録情報

   To: ietf-types@iana.org

   Subject: Registration of MIME media type application/ogg

   MIME media type name: application

   MIME subtype name: ogg

   Required parameters: none

   Optional parameters: none

   Encoding Considerations:

The Ogg bitstream format is binary data, and must be encoded for non-binary transport; the Base64 encoding is suitable for Email. Binary encoding could also be used.

Ogg ビット列形式はバイナリ・データであり、非バイナリ転送路では符号化しなければなりません。電子メイルでは Base64 符号化が適当です。 Binary 符号化も使用できます。

   Security Considerations:

As the Ogg bitstream file is a container format and only a carrier of content (such as Vorbis audio) with a very rigid definition (see [1]), this format in itself is not more vulnerable than any other content framing mechanism. The main security consideration for the receiving application is to ensure that manipulated packages can not cause buffer overflows and the like. It is possible to encapsulate even executable content in the bitstream, so for such uses additional security considerations must be taken.

Ogg ビット列は包含形式であって、非常に厳格な定義 ([1] 参照) を伴う (Vorbis などの) 内容の運搬器にに過ぎず、この形式自体は他の機構以上に脆弱なものではありません。受信の主たる保安上の注意点は、操作が溢れのようなことをしかねないようにすることです。ビット列中に実行可能な内容をすることも可能ですから、そのような用途には追加の保安上の注意が必要です。

Ogg bitstream files are not signed or encrypted using any applicable encryption schemes. External security mechanisms must be added if content confidentiality and authenticity is to be achieved.

Ogg ビット列はどんな適用可能な方式を使っても署名したり暗号化されたりしていません。内容の機密性や信頼性が必要な時には外部の安全上の機構を追加しなければなりません。

   Interoperability considerations:

The Ogg bitstream format has proved to be widely implementable across different computing platforms. A broadly portable reference implementation is available under a BSD license.

Ogg ビット列書式は様々な計算機で広く実装可能なことは証明されています。広く可般な参照実装が BSD で入手可能です。

The Ogg bitstream format is not patented and can be implemented by third parties without patent considerations.

Ogg ビット列書式は特許化されておらず、特許の心配無しに第3者が実装することが出来ます。

   Published specification:

   See [1].

   Applications which use this media type:

Any application that implements the specification will be able to encode or decode Ogg bitstream files. Specifically, the format is supposed to be used by subcodecs that implement, for example, Vorbis audio.

仕様を実装する任意のが Ogg ビット列を符号化したり復号したり出来ます。特に、この書式は例えば Vorbis を実装するで使うことが想定されています。

   Additional information:

   Magic number(s):

In Ogg bitstream files, the first four bytes are 0x4f 0x67 0x67 0x53 corresponding to the string "OggS".

Ogg ビット列では、最初の4倍とは 0x4f 0x67 0x67 0x53 で、これは文字列 OggS に対応します。

   File extension: .ogg

   Macintosh File Type Code(s): OggS

   Object Identifier(s) or OID(s): none

   Person & email address to contact for further information:

Questions about this proposal should be directed to Linus Walleij <triad@df.lth.se>. Technical questions about the Ogg bitstream standard may be asked on the mailing lists for the developer community. http://www.xiph.org/archives/

この提案についての質問は、 Linus Walleij に直接ご連絡下さい。 Ogg ビット列規格についての技術的質問は開発者のにお尋ね下さい。 http://www.xiph.org/archives/

   Intended usage: COMMON

   Author/Change controller:

This document was written by Linus Walleij <triad@df.lth.se>. Changes to this document will either be handled by him, a representative of the Xiph.org, or the associated development communities.

この文書は Linus Walleij が書きました。この文書への変更は Linus, Xiph.org の代表, 又は関連開発が扱います。

The Ogg bitstream format is controlled by the Xiph.org and the respective development communities.

Ogg ビット列書式は Xiph.org とその開発者が統制しています。

5. Intellectual Property Statement

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*6.  Author's Address

   Linus Walleij
   The Ogg Vorbis Community
   Master Olofs Vag 24
   Lund  224 66
   SE

   Phone: +46 703 193678
   EMail: triad@df.lth.se
   URI:   http://www.xiph.org/

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Status of this Memo

Copyright Notice

Abstract

Conventions used in this Document この文書で使う用語

1. The Ogg Bitstream Format Ogg ビット列形式

2. Registration Information 登録情報

3. Security Considerations

4. Normative References

5. Intellectual Property Statement

7. Full Copyright Statement

Acknowledgement

License

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