CMOS sensor supports portable HD video at 240 frames per second

CMOS sensor supports portable HD video at 240 frames per second

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By eeNews Europe

High-speed video recording generally results in underexposed images with short exposure times, making it difficult to increase the frame rate, explains the manufacturer. Toshiba’s T4K82 incorporates ‘Bright Mode’ technology that boosts image brightness by up to four times, realizing full HD video capture at 240 fps equivalent.

‘Bright Mode’ technology secures double the exposure time by adopting interlaced video output rather than the progressive output used by standard CMOS sensors. ‘Bright Mode’ also employs charge binning, which doubles the electrical charge of each pixel. This results in an image four times brighter than that from a CMOS sensor without ‘Bright Mode’. Toshiba will also provide an interlace-progressive conversion program that enables users to offer high-quality progressive video with low image deterioration, without changing the frame rate. 

The new sensor has a pixel pitch of 1.12μm and satisfies the 1/3.07-inch optical format. Recommended module size is 8.5×8.5mm. A newly developed low power circuit design reduces power consumption to 82% that of the T4K37, a 13-megapixel sensor in mass production.

Maximum respective output frame rate for the T4K82 in normal mode (progressive output) and Bright Mode (interlaced output after processing by an application that uses Toshiba’s interlace-progressive conversion program) is 120fps and 240fps for both full HD (1920×1080) and HD (1280×720).

This increases to 240fps and 480fps for WVGA (800×480) and VGA (640×480) and is up to 480fps and 900fps for QVGA (320×240). For sensor output modes of 13M (4208×3120) and 4K2K (3840 x 2160) the T4K82 offers normal mode output at 30fps.

Sample shipments of the T4K82 will start in March 2014 with mass production planned for September 2014.


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