Digital Photo Frame (DPF) can solve the problem of displaying digital photos without a computer. The basic function model can only display pictures in JPEG format as a slideshow, while multimedia features (such as zooming and rotating pictures, playing music and videos, supporting all commonly used memory cards, internal memory, automatic on / off, etc.) require high-end components , But its power consumption remains at the low end. The new generation multimedia digital photo frame provides the possibility to connect to the Internet and download pictures and information (such as weather, news) from the server.
The kernel subsystem includes:
Video engine and microprocessor-perform JPEG processing and MPEG decoding, manipulate audio processing, and control power management and user interface. The ability to integrate multiple functions may require separate solutions for audio, video, and interface.
Audio-provides up to 2 channels of audio output. These audios are usually decoded by the processor, which requires digital-to-analog conversion and amplification.
Memory-stores execution code, data / parameters and pictures, movies and sounds. Memory cards may require swapping and voltage level conversion.
User interface-allows users to control the digital photo frame through buttons, remote or touch screen control.
Power conversion-converts the input power of the AC / DC wall adapter to run various functional blocks. Battery charge management can be controlled by the microprocessor.
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