What is a .OTB file?
The file extension .OTB stands for Nokia Over The Air Bitmap Image. This type of file is specifically designed for use with certain mobile phones, mainly older models from Nokia and Siemens. The main purpose of an .OTB file is to store images that can be sent or received over the air, meaning through the mobile network, between these phones. The images stored in .OTB files are quite simple. They are black and white bitmap images, which means they only contain two colors: black and white. These images are also limited in size, with the maximum dimensions being 255 pixels by 255 pixels. This small size and the simple color scheme help the images to be easily transmitted over the mobile network, which was especially important in the days when these phones were more common and network speeds were slower.
.OTB files can be saved in two different formats. One is a hexadecimal text format, which represents the image data as hexadecimal numbers (a base-16 number system used in computing). The other is a binary format, which represents the image data in binary (a base-2 numeral system with only two symbols, 0 and 1), the most direct and efficient format for computers to process.
To view or manage .OTB files on a computer, you can use specific software programs. One such program is XnViewMP, which is mentioned twice but is indeed a single program capable of opening these files. Another option is the Nokia Multimedia Player, which is designed to work with various multimedia files associated with Nokia phones, including .OTB files. These programs allow you to open, view, and sometimes convert .OTB files into other image formats that are more commonly used today.
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