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Mobile Communication

Mobile Communication. MMS. Elements of MMS. RFC 822 and MIME are the two most common formats used for structuring MMS messages on the INTERNET In MMS, text is supported as part of a simple message or as part of a scene description <XHTML or SMIL> in a multipart message.

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Mobile Communication

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  1. Mobile Communication MMS

  2. Elements of MMS RFC 822 and MIME are the two most common formats used for structuring MMS messages on the INTERNET In MMS, text is supported as part of a simple message or as part of a scene description <XHTML or SMIL> in a multipart message. With SMIL <Synchronized Multimedia Integration Language>, a text section is included as an independent body part in the message and is referred to in the SMIL scene description

  3. Elements of MMS In MMS, several formats can be used for representing images in MMS. Bitmap files are commonly used because they are readily available over the internet, other common formats for bitmap are JPEG, GIF, Portable Network Graphic <PNG> and WBMP PNG is used for representing bitmap images in a loss-less fashion, because PNG ensures a good compression ratio and supports image transparency.

  4. Elements of MMS In MMS, several formats can be used for representing images in MMS. Bitmap files are commonly used because they are readily available over the internet, other common formats for bitmap are JPEG, GIF, Portable Network Graphic <PNG> and WBMP PNG is used for representing bitmap images in a loss-less fashion, because PNG ensures a good compression ratio and supports image transparency.

  5. Elements of MMS Other types of images can be included in multimedia messages. These images are known as “scalable vector graphics”. <SVG> Scalable vector graphics are based on descriptions of graphical elements composing the represented image. The size of an image in SVG format is 2OO octets against 16OO octets for an equivalent representation of 128x128 pixels in GIF format. <svg width=“128” height=“128” <circle cx=“45” cy=“45” r=“4O” fill=“yellow”/> Image indicates a plain yellow circle < centre coordinates are 45,45 and radius is 4O pixels>

  6. Elements of MMS <Audio> • Several audio formats can be supported in MMS. Audio formats are usually grouped into two categories • Natural Audio • Are used to represent recorded materials such as speech • Synthetic Audio • Consists of specifying commands instructing synthesizer on how to render sound

  7. Elements of MMS <Audio> iMelody format is not a format suggested by MMS but can be supported there are MMS enabled devices that support iMelody and MIDI for “Synthetic Audio” In the Natural Audio category. Formats that can be supported are AMR and MP3 AMR <Adaptive Multirate> codec is commonly used to represent speech in mobile networks. This codec can adapt its rate according to available resources. Possible rates range from 4.75 to 12.kbps.

  8. Elements of MMS <Audio> AMR, when configured at given rates, becomes directly compatible with technical characteristics of other codec's specified by several standardization organizations. For instance AMR, at 12.2 kbps rate is compatible with the EFR <enhanced full rate> speech codec defined by ETSI for GSM.

  9. Elements of MMS <Video> AMR, when configured at given rates, becomes directly compatible with technical characteristics of other codec's specified by several standardization organizations. For instance AMR, at 12.2 kbps rate is compatible with the EFR <enhanced full rate> speech codec defined by ETSI for GSM.

  10. MMS Submission & reports In the MMS environment, transactions between entities are usually preformed in an asynchronous fashion. In the person-person scenario, the message submission refers to the sending of a message from an originator MMS user agent to its associated MMSC over the MM1 interface. The support of submission of a message is optional for the MMS user agent whereas it is mandatory for an MMSC. Upon reception of a submitted message, the originating MMSC consults routing tables and transfers the message to the recipient MMSC <or other server>

  11. MMS Submission & reports In the MMS environment, transactions between entities are usually preformed in an asynchronous fashion. In the person-person scenario, the message submission refers to the sending of a message from an originator MMS user agent to its associated MMSC over the MM1 interface. The support of submission of a message is optional for the MMS user agent whereas it is mandatory for an MMSC. Upon reception of a submitted message, the originating MMSC consults routing tables and transfers the message to the recipient MMSC <or other server>

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