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3. TECHNICAL BRIEF
• View Finding during Video Encoding:
During video recording the user needs to see what is being
recorded. Therefore, the captured frames are not only encoded but also transferred to the display
interface. If only every second frame from the camera is used for encoding, viewfinding is possible
without burdening the CPU. However, if each frame from the camera has to be encoded, due to low
camera frame rate, the YCbCr4:2:2 to YCbCr4:4:4 color conversion and further downscaling is
performed by SW.
Picture rotation and overlay has to be done in SW in any case.
• Storage:
Compressed H.263 or MPEG-4 videos can be stored on an MMC/SD, a Flash or a PC.
• Viewing:
De-multiplexing of audio and video streams is performed by the ARM. The H.263 or
MPEG-4 decoding is also done by SW on the ARM and then the frames are transferred to the display
interface.
Audio decoding (GSM-AMR) is done on the DSP.
The audio/video synchronization is done by time stamp feedback from the DSP to the ARM.
• Sending/Receiving: H.263 or MPEG-4 videos can be sent/received as MMS (E-GPRS), as e-mail or
downloaded from the internet.
Higher Multimedia Performance
If higher multimedia performance is required, an external multimedia IC can be connected to S-
GOLDradioTM because it contains a multimedia IC interface module. The camera and display
interface pins are used in a multiplex mode to connect an external multimedia IC to the S-
GOLDradioTM multimedia IC interface module. The display and camera are connected to the
multimedia IC, which contains functions (in HW and/or SW) to process still images and video data.
This configuration is intended for higher-end graphics features (for example, high quality video
streaming, video conferencing, hardware-assisted 2D/3D graphics functions, etc.).
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Содержание KC550
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