Digital signal processor and digital image processing apparatus adopting the same with concurrent live view frame and picture image processing
View Patent ↗A digital signal processor and a digital image processing apparatus adopting the same. The digital signal processor comprises a data converter, which converts digital image data in red, green, and blue form to digital image data in luminance and chrominance form, such that when photograph-image data is captured by photographing, the data converter processes the photograph-image data during each period of time from the time when processing of one frame data of live-view is completed to the time when processing of next frame data begins.
1. A digital signal processor, comprising:
a data converter, which converts digital image data in red, green, and blue form to digital image data in luminance and chrominance form; and
a core processor, which controls the data converter when photograph-image data for a given image is captured by photographing, during a live-view converting time period in which a frame data in red, green, and blue form is converted to a frame data in luminance and chrominance form, to convert a Bart of the captured photograph image data using the time remaining of the live-view converting time period after converting a frame data of live-view,
wherein the converting of the photograph image data and the processing of the frame data of live-view are performed together during the live-view converting time period.
2. A digital image processing apparatus comprising:
a digital signal processor as claimed in claim 1 .
3. The digital image processing apparatus of claim 2 , further comprising:
an optical system, which optically processes light of a subject;
a photoelectric converter, which converts the light from the optical system to an electric analog image signal in red, green, and blue;
an analog-to-digital converter, which converts the analog image signal from the photoelectric converter to digital image data, and inputs the digital image data to the digital signal processor;
a display device, which displays an image according to the digital image data from the digital signal processor; and
a random access memory (RAM), in which the digital image data from the digital signal processor is temporarily stored.
4. The digital image processing apparatus of claim 3 , wherein the digital signal processor further comprises:
a data formatter, which arranges the digital image data from the analog-to-digital converter according to a storage form of the RAM;
a plurality of resizers, which reduce resolution of the digital image data from the analog-digital converter; and
an encoder, which compresses the digital image data from the analog-to-digital converter,
wherein the core processor controls operations of at least the data converter and resizers.
5. The digital image processing apparatus of claim 4 , wherein when the frame data of live-view is inputted to the digital signal processor from the analog-to-digital converter,
the data converter converts the frame data to frame data in luminance and chrominance form according to control of the core processor during a live-view conversion period,
the resizers decrease resolution of the frame data in luminance and chrominance form according to control of the core processor during a live-view reduction period, and
the core processor inputs the frame data with decreased resolution to an input device during a live-view display period.
6. The digital image processing apparatus of claim 5 , wherein N is defined as a first natural number, with N, N+1, and N+2 being defined as three sequential natural numbers and the live-view conversion period of N+2th frame data, the live-view reduction period of N+1th frame data, and the live-view display period of Nth frame data are substantially simultaneously performed.
7. The digital image processing apparatus of claim 6 , further comprising a shutter release button having a two-stage structure, wherein a first signal and a second signal are generated from the shutter release button.
8. The digital image processing apparatus of claim 7 , wherein when the first signal is generated, the digital signal processor performs an automatic focusing according to control signals of the core processor as the frame data of live-view is continuously processed in the live-view conversion period, the live-view reduction period, and the live-view display period.
9. The digital image processing apparatus of claim 8 , wherein when the second signal is generated,
processing of the frame data of live-view is stopped,
the photograph-image data is captured by the core processor while processing of the frame data of live-view is stopped,
the frame data of live-view continues to be processed when the capture of the photograph-image data is completed,
the data converter converts the captured photograph-image data to photograph-image data in luminance and chrominance form during each period of time from the time when processing of one frame data of live-view is completed to the time when processing of next frame of live view data begins,
the resizers reduce resolution of the converted photograph-image data while the frame data of live-view is being processed,
the encoder compresses the converted photograph-image data while the frame data of live-view is being processed, and
the core processor records the compressed photograph-image data and the photograph-image data with reduced resolution in a recording medium while the frame data of live-view is being processed.
10. The digital image processing apparatus as claimed in claim 2 , wherein:
the data converter converts the digital image data and processes the photograph-image data to enable the digital image processing apparatus to photograph two photograph images within one second.
11. A digital image processing method comprising:
converting digital image data in red, green, and blue form to digital image data in luminance and chrominance form; and
when photograph-image data for a given image is captured by photographing, during a live-view converting time period in which a frame data in red, green, and blue form is converted to a frame data in luminance and chrominance form, converting a part of the photograph-image data in a time remaining after converting the frame data of live-view,
wherein the converting of the photograph image data and the processing of the frame data of live-view are performed together during the live-view converting time period.
12. The method of claim 11 , further comprising:
operating a digital image processing apparatus to perform the converting and processing steps.
13. The method of claim 11 , further comprising:
optically processing light of a subject;
converting the light to an electric analog image signal in red, green, and blue;
converting the analog image signal from a photoelectric converter to digital image data;
displaying an image according to the digital image data from a digital signal processor; and
temporarily storing the digital image data from the digital signal processor in a random access memory (RAM).
14. The method of claim 13 , further comprising:
arranging the digital image data according to a storage form of the RAM;
reducing resolution of the digital image data; and
compressing the digital image data from an analog-to-digital converter.
15. The method of claim 14 , wherein when the frame data of live-view is input:
converting the frame data to frame data in luminance and chrominance form during a live-view conversion period,
decreasing resolution of the frame data in luminance and chrominance form during a live-view reduction period, and
inputting the frame data with decreased resolution to an input device during a live-view display period.
16. The method of claim 15 , wherein N is defined as a first natural number, with N, N+1, and N+2 being defined as three sequential natural numbers and the live-view conversion period of N+2th frame data, the live-view reduction period of N+1th frame data, and the live-view display period of Nth frame data are substantially simultaneously performed.
17. The method of claim 16 , further comprising:
operating a shutter release button having a two-stage structure to generate a first signal and a second signal.
18. The method of claim 17 , wherein when the first signal is generated, performing automatic focusing as the frame data of live-view is continuously processed in the live-view conversion period, the live-view reduction period, and the live-view display period.
19. The method of claim 18 , wherein when the second signal is generated,
processing of the frame data of live-view is stopped,
capturing the photograph-image data while processing of the frame data of live-view is stopped,
continuing to process the frame data of live-view when the capture of the photograph-image data is completed,
converting the captured photograph-image data to photograph-image data in luminance and chrominance form during each period of time from the time when processing of one frame data of live-view is completed to the time when processing of next frame data begins,
reducing resolution of the converted photograph-image data while the frame data of live-view is being processed,
compressing the converted photograph-image data while the frame data of live-view is being processed, and
recording the compressed photograph-image data and the photograph-image data with reduced resolution in a recording medium while the frame data of live-view is being processed.
20. The method as claimed in claim 12 , wherein:
the converting and processing of the photograph-image data is performed to enable the digital image processing apparatus to photograph two photograph images within one second.
21. A digital signal processor, according to claim 1 , wherein the photograph-image data is data of a single photograph image, and the data converter processes the single photograph-image data at a plurality of different and non-contiguous times, with a completion of a processing operation of one live-view frame data corresponding to a completion of a processing operation of one live-view frame data.