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3. TECHNICAL BRIEF
Video and Imaging
S-GOLDradioTM allows connecting an external camera module over an ITU-R BT656 compliant
interface and a display module over a microcontroller-like parallel or serial interface. Furthermore,
ARM’s MOVE coprocessor is integrated to accelerate video encoding algorithms (for example, H.263
or MPEG-4). This fulfills basic multimedia requirements and allows connecting commodity cameras
and displays without the need of an additional multimedia IC. The computational power for encoding
and decoding still pictures (JPEG) and video sequences (H.263 or MPEG-4) is provided by the
integrated ARM926 core.
Over-the-air interface JPEG pictures and H.263 or MPEG-4 videos can be sent or received as MMS by
means of (E)GPRS.
S-GOLDradioTM also enables video down-streaming because of its DSP and ARM performances.
Supported "still pictures" multimedia scenarios are:
• View Finding for a Picture Snapshot:
Captured frames are transferred from the camera IF to the
display IF at up to15 fps (depending on the camera used) in QCIF resolution (depending on the
display used). Downscaling and color conversion is done by the camera and display interface logic.
Therefore, view finding for a snapshot is possible without burdening the CPU. However, picture
rotation and/or overlay are performed by SW if required.
• Shooting:
The captured picture, with up to 1.31 MPixel resolution (SXGA 1280 x 1024), is
transferred within 1/15 sec to external memory.1) Then, JPEG compression is done by SW, while the
viewfinder is frozen so that the user can immediately see the snapshot on the display.
• Photo Flash:
Under low light conditions usually a photo flash is required. To activate the flash at the
right time, a general purpose timer unit (GTPU) can be used that is triggered by the frame
synchronization signal (VSYNC) from the camera interface.
• Processing:
JPEG thumbnail generation, picture overlay, picture rotation and other picture
processing tasks are performed by SW.
• Viewing:
A JPEG picture is decoded, down-scaled and format converted by SW and then transferred
to the display interface. JPEG thumbnails can also be transferred directly to the display interface after
decoding by SW without additional downscaling.
• Storage:
JPEG pictures can be stored on an MMC/SD card, a Flash or a PC.
• Sending/Receiving:
JPEG thumbnails can be sent/received as MMS (E-GPRS). Full resolution
JPEG pictures can be sent/received as e-mail or downloaded from the internet.
Supported "video sequence" multimedia scenarios:
• Record Video Sequences:
Captured frames in QCIF resolution are transferred to internal memory
at 15 fps. H.263 or MPEG-4 encoding is performed on-the-fly by SW with the support of the MOVE
coprocessor.
The audio recording is performed on the DSP (GSM AMR CODEC). Multiplexing of audio and video
streams is performed by the ARM.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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