Preview mode low resolution output system and method
First Claim
1. A system for previewing an image, comprising:
- an image processor system that;
receives an image signal for an image;
amplifies said image signal at a higher current level and a lower current level;
converts said image signal into a digital signal correspondingly having a higher data resolution level and a lower data resolution level;
determines whether the image signal is to be previewed;
in response to the determination that the image signal is to be previewed, selects the lower current level to produce a preview digital image at the lower data resolution level; and
comprises an analog-to-digital converter (ADC) for converting said image signal into the digital signal correspondingly having the higher data resolution level and the lower data resolution level wherein the ADC has a total number of ADC stages and a number of the total number of ADC stages that are used is changed between providing the higher data resolution level and the lower data resolution level for the digital signal.
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Accused Products
Abstract
A processing system for a charge coupled device (CCD) or CMOS imaging system includes a correlated double sample (CDS) circuit for receiving data from an imager, a variable gain amplifier (VGA) having amplifiers of selectable current level to enable reduced data resolution in a preview display, a low power mode analog-to-digital converter (ADC) having a selectable narrow bit-width output and coupled to said VGA circuit, and a gain circuit coupled to said ADC. The single chip low-power analog front end produces digitized CCD data in either 13-bit, 12-bit or 10-bit formats at a first current level and 9-bit, 8-bit, or 6-bit formats at a second current level. The VGA amplifier includes symmetrical subcircuits which are independently actuable to enable full or reduced data resolution levels respectively for still image capture operation and video previewing on a separate preview screen.
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Citations
18 Claims
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1. A system for previewing an image, comprising:
an image processor system that; receives an image signal for an image; amplifies said image signal at a higher current level and a lower current level; converts said image signal into a digital signal correspondingly having a higher data resolution level and a lower data resolution level; determines whether the image signal is to be previewed; in response to the determination that the image signal is to be previewed, selects the lower current level to produce a preview digital image at the lower data resolution level; and comprises an analog-to-digital converter (ADC) for converting said image signal into the digital signal correspondingly having the higher data resolution level and the lower data resolution level wherein the ADC has a total number of ADC stages and a number of the total number of ADC stages that are used is changed between providing the higher data resolution level and the lower data resolution level for the digital signal. - View Dependent Claims (2, 3, 4, 5)
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6. A method for an image processor system to preview an image, comprising:
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receiving an image signal for an image; amplifying said image signal at a higher current level and a lower current level; converting said image signal into a digital signal correspondingly having a higher data resolution level and a lower data resolution level; determining whether the image signal is to be previewed; and in response to determining that the image signal is to be previewed, selecting the lower current level to produce a preview digital image at the lower data resolution level; converting, by an analog-to-digital converter (ADC) having a total number of ADC stages, said image signal into the digital signal correspondingly having the higher data resolution level and the lower data resolution level; and changing a number of the total number of ADC stages that are used between providing the higher data resolution level and the lower data resolution level for the digital signal. - View Dependent Claims (7, 8, 9, 10)
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11. A system for previewing an image, comprising:
an image processor system that; receives an image signal for an image; amplifies said image signal at a higher current level and a lower current level; converts said image signal into a digital signal correspondingly having a higher data resolution level and a lower data resolution level; determines whether the image signal is to be previewed; in response to the determination that the image signal is to be previewed, selects the lower current level to produce a preview digital image at the lower data resolution level; and comprises an analog-to-digital converter (ADC) for converting said image signal into the digital signal correspondingly having the higher data resolution level and the lower data resolution level wherein a bit format for an output of the ADC is changed when the digital signal changes between the higher data resolution level and the lower data resolution level. - View Dependent Claims (12, 13, 14)
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15. A method for previewing an image by an image processor system, comprising:
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receiving an image signal for an image; amplifying said image signal at a higher current level and a lower current level; converting said image signal into a digital signal correspondingly having a higher data resolution level and a lower data resolution level; determining whether the image signal is to be previewed; in response to determining that the image signal is to be previewed, selecting the lower current level to produce a preview digital image at the lower data resolution level; converting, by an analog-to-digital converter (ADC), said image signal into the digital signal correspondingly having the higher data resolution level and the lower data resolution level; and changing a bit format for an output of the ADC when the digital signal changes between providing the higher data resolution level and the lower data resolution level. - View Dependent Claims (16, 17, 18)
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Specification