Mobile message type specification - OTA bitmap SMS
(SMS message type, SMS message format)
Introduction
An OTA bitmap is used for various SMS formats: Operator logo, CLI icon, Picture Message, and Downloadable Profile. In most phones the maximum size of the operator logo and the CLI icon is 72 x 14 pixels, while the maximum size of the picture message and the screen saver is 72 x 28 pixels. An OTA bitmap consists of a bitmap header and bitmap data. The size of the bitmap is specified in the header.
A typical OTA bitmap (72 x 14 pixels) header is: 00480E01
00 |
Infofield |
48 |
Width of the bitmap is 72 pixels |
0E |
Height of the bitmap is 14 pixels |
00 |
Number of colors or grey shades (only one color) |
The image data is located after the header information and is encoded as follows. Each semi-octet in the OTA bitmap presents 4 pixels in the original bitmap. As one row takes 18 semi-octets, the whole 72 x 14 (operator logo and CLI icon) bitmap takes 18 x 14 = 252 semi-octets = 126 octets. Including the picture message and the screen saver, the entire 72 x 28 size bitmap takes 18 x 28 = 504 semi-octets = 252 octets. For example, if the first four pixels of the image are 1010 (1 - black, 0 - white), the first semi-octet of the OTA bitmap data is hex A.
Example:
Here is an example of a simple OTA bitmap (72 x 14 pixels). In the picture, there are two black lines and several black dots:
FFFFFFFFFFFFFFFFFF <- First line black000000000000000000 <- Second line white
FFFFFFFFFFFFFFFFFF
000000000000000000
10F000000000000000 <- Fourth pixel of this line is black and 9-12
000000000000000000 pixels are also black
000000000000000000
000000000000000000
000000000000000000
000000000000000000
000000000000000000
000000000000000000
000000000000000000
000000000000000001 <- Last pixel of this row/bitmap is black
More information
- Introduction aux types de messages mobiles
- Spécification du type de message mobile - SMS Bitmap OTA
- Spécification du type de message mobile - SMS Logo opérateur, XML
- Spécification du type de message mobile - SMS Logo opérateur, binaire
- Spécification du type de message mobile - SMS Sonnerie
- Spécification du type de message mobile - SMS WAP Push
- Spécification du type de message mobile - SMS binaire XML
- Spécification du type de message mobile - SMS VCard
- Spécification du type de message mobile - SMS VCalendar
- Introduction à l'indication de message SMS
- Spécification du type de message mobile - Lien de page web, SMS
- Message multimédia MMS
- Spécification du type de message mobile - SMS Paramètres du navigateur OTA
- Spécification du type de message mobile - SMS Paramètres SyncML OTA
- Spécification du type de message mobile
- Comment envoyer un message USSD
- Spécification du type de message mobile - SMS WAP Push SL
- Spécification du type de message mobile - Message image