CMOS image sensor apparatus with on-chip real-time pipelined JPEG compression module
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Abstract
A CMOS imager in which a CMOS image sensor, a color image processing module and an image compression module are all provided on a single die. Both the color image processing module and the image compression module incorporate pipelined architectures to process the image data at a video rate in a massively parallel fashion.
37 Citations
39 Claims
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1-25. -25. (canceled)
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26. A CMOS imaging device integrated on a single chip, comprising:
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a CMOS image sensor;
a color image processing module;
an image storage module coupled to said color image processing module; and
an image compression module coupled to said image storage module, wherein said image compression module has a pipelined architecture for processing image data in a parallel fashion at video rates without requiring a full frame memory buffer, wherein said image compression module implements JPEG compression at video rates, and wherein said image storage module comprises a plurality of line buffers at a front end of the compression module to allow two-dimensional processing.
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27. A CMOS imaging device integrated on a single chip, comprising:
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a CMOS image sensor;
a color image processing module;
an image storage module coupled to said color image processing module; and
an image compression module coupled to said image storage module, wherein said image compression module has a pipelined architecture for processing image data in a parallel fashion at video rates without requiring a full frame memory buffer, wherein said image compression module implements JPEG compression at video rates, and wherein said image storage module uses an SRAM addressing scheme to allow maximum utilization rate of memory, comprising reading and writing to one SRAM at the same rate without overwriting. - View Dependent Claims (28)
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29. A CMOS imaging device integrated on a single chip, comprising:
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a CMOS image sensor;
a color image processing module;
an image storage module coupled to said color image processing module;
an image compression module coupled to said image storage module; and
a buffer at the output of the image compression module to allow for periods of fixed-rate data output interspersed with periods of inactivity, wherein said image compression module has a pipelined architecture for processing image data in a parallel fashion at video rates without requiring a full frame memory buffer, and wherein said image compression module implements JPEG compression at video rates. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A process for processing image data from a CMOS imager device, comprising the steps of:
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converting an image to image data using a CMOS image sensor;
color image processing said image data from a first format which is native to a CMOS imager to a second format more suitable for image compression;
storing said processed image data in a memory; and
compressing said stored image data using a processing module having a pipelined architecture for processing image data in a parallel fashion at video rates without requiring a full frame memory buffer, wherein said step of compressing the image comprises JPEG compression at video rates, and wherein said step of storing said processed image data in a memory comprises using an SRAM addressing scheme to allow maximum utilization rate of memory, said SRAM addressing scheme comprising reading and writing to one SRAM at the same rate without overwriting.
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Specification