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Signal processing apparatus, signal processing method, image pickup element, and imaging apparatus

A signal processing device and signal technology, applied in electrical components, picture signal generators, image communication, etc., can solve problems such as large kTC noise, image quality degradation, and difficulty in fully suppressing kTC noise

Active Publication Date: 2015-08-19
SONY SEMICON SOLUTIONS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In particular, in the case where full depletion is not performed in the pixel structure of the imaging element, kTC noise becomes larger, and it is more difficult to sufficiently suppress kTC noise
As a result, further deterioration of the image quality of the captured image obtained by the imaging element may occur

Method used

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  • Signal processing apparatus, signal processing method, image pickup element, and imaging apparatus
  • Signal processing apparatus, signal processing method, image pickup element, and imaging apparatus
  • Signal processing apparatus, signal processing method, image pickup element, and imaging apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0055] 1. First Embodiment (Signal Processing Device, Imaging Element, and Imaging Device)

[0056] 2. Second embodiment (imaging element)

no. 3 example

[0057] 3. Third embodiment (imaging element)

no. 4 example

[0058] 4. Fourth embodiment (imaging element)

[0059] 5. Fifth embodiment (imaging device)

[0060] 1. The first embodiment

[0061] kTC noise

[0062] In recent years, image sensors (image pickup elements) using CCDs (Charge Coupled Devices) or CMOS (Complementary Metal Oxide Semiconductors) have been used as image pickup elements that pick up images in image pickup devices such as video cameras and digital still cameras. Also, as these imaging elements, single-plate type imaging elements have been used.

[0063] In a single-plate type image pickup element, color filters each having a different color are correspondingly provided in pixels (generally, an RGB Bayer array has been widely used). For example, where the color filters in this Bayer array have primary colors, blue and red light will not be transmitted to the pixels below the green filter. Thus, there is a problem that light cannot be used efficiently. Also, processing (demosaic processing) to generate a color i...

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Abstract

Provided is a signal processing apparatus, including: an A / D conversion unit configured to perform A / D conversion of a first signal, A / D conversion of a second signal, A / D conversion of a third signal, and A / D conversion of a fourth signal; and a correlated double sampling processing unit configured to generate a first output signal by performing correlated double sampling using a first digital data item obtained through the A / D conversion of the first signal, and a second digital data item obtained through the A / D conversion of the second signal, a second output signal by performing correlated double sampling using a third digital data item obtained through the A / D conversion of the third signal, and a fourth digital data item obtained through the A / D conversion of the fourth signal, and a third output signal by performing correlated double sampling using the first output signal and the second output signal.

Description

technical field [0001] The present technology relates to a signal processing device, a signal processing method, an imaging element, and an imaging device. More specifically, the present technology relates to a signal processing device, a signal processing method, an imaging element, and an imaging device capable of suppressing image quality degradation. Background technique [0002] In recent years, in imaging devices such as video cameras and digital cameras, image sensors (imaging elements) using charge coupled devices (CCD: Charge Coupled Device) or complementary metal oxide semiconductors (CMOS: Complementary Metal Oxide Semiconductor) have been used as The camera element that captures images. [0003] In such an imaging element, reset noise (ie, kTC noise) due to thermal fluctuation of charges, for example, is generated at those portions where charges are converted into voltages. In view of this situation, various methods for suppressing kTC noise have been devised (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/363H04N5/378H04N9/04H04N25/65H04N23/12
CPCH04N5/374H04N5/363H04N25/616H04N25/65H04N25/78H03M3/342H04N25/75H04N25/76
Inventor 市川达也嶋村延幸铃木敦史大池佑辅本田胜巳中村匡宏
Owner SONY SEMICON SOLUTIONS CORP
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