CN100397867C - Imaging signal processing circuit and camera system - Google Patents
Imaging signal processing circuit and camera system Download PDFInfo
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- CN100397867C CN100397867C CNB2005100793818A CN200510079381A CN100397867C CN 100397867 C CN100397867 C CN 100397867C CN B2005100793818 A CNB2005100793818 A CN B2005100793818A CN 200510079381 A CN200510079381 A CN 200510079381A CN 100397867 C CN100397867 C CN 100397867C
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Abstract
The present invention provides an imaging signal processing circuit comprising a color signal processing unit for inputting a digital imaging signal obtained by vertically reading a signal from a solid imaging element by means of N-field interlace method and further digital-converting the signal and executing a color conversion processing for converting the digital imaging signal into a luminance signal and a color difference signal, a compression/expansion processing unit for executing a compression processing for estimating an encoding amount and thereby previously obtaining a compression rate using the color-converted digital imaging signal, the compression/expansion processing unit further compressing the digital imaging signals up to a field at which fetch of the digital imaging signal is completed before fetch of the digital imaging signal in a Nth field is completed based on the obtained compression rate and generating compressed image data, and an image data recording unit for transferring and recording the generated compressed image data with respect to a recording medium.
Description
Technical field
The present invention relates to be used for handling the imaging signal processing circuit of the data image signal that obtains in read operation about solid-state imaging element by interlacing scan (interlace) method.The invention still further relates to camera arrangement.
Background technology
In recent years, in the technical field relevant with camera arrangement, the main concern realized processing speed and the number that increases recorded content faster.
In the camera arrangement of correlation technique shown in Figure 9, the image of photographic transmits by phtographic lens 41, on such as the solid-state imaging element 42 of CCD (charge coupled device), focus on,, and be output by opto-electronic conversion based on the driving sequencing control of carrying out by solid-state imaging element driver element 43 as analog signal.Next, this analog signal simulated signal processing unit 44 amplifications and stands noise remove etc., and changes data image signal into by analog/digital conversion unit 45.Data image signal is input to the chrominance signal processing unit 51 of imaging signal processing circuit 200, be the picture signal of luminance signal and color difference signal thereby produce by color conversion process, and this picture signal is output to compression/extension processing unit 52.In compression/extension processing unit 52, this picture signal is carried out the compression processing that is used for the estimated coding amount and obtains compression ratio thus.In addition, based on the compression ratio that obtains, by for example JPEG (JPEG (joint photographic experts group)) method compressing image data, and output is as the compressing image data that will be stored in the external memory storage 61.Use similar method, produce and in external memory storage 61, store thumbnail image data such as RAM (random access memory).Based on the control of being carried out by CPU55, externally the compressing image data of storage is treated to the data of conformance with standard form in the memory 61, and is imported into Imagery Data Recording unit 53.View data by Imagery Data Recording unit 53 recording compressed on recording medium 62.By showing the picture signal of output unit 54 demonstration/outputs from 51 outputs of chrominance signal processing unit.Figure 10 shows data flow.Figure 11 is the legend of a three-acquisition methods, and Figure 12 is the legend of a five-acquisition methods.
The camera arrangement of correlation technique has following point: need have jumbo external memory storage and store color-conversion image data temporarily; External memory storage is visited frequently; Have to adopt quadratic method, wherein the compression of coding-amount-estimation is handled and is carried out in advance, obtaining compression ratio in the compression/extension processing unit, and after this obtains view data and compression from external memory storage; And be written into the external memory storage from the view data of compression/extension processing unit output, based on the view data on the CPU control reading external memory, and via the Imagery Data Recording unit record on recording medium.Because the problems referred to above are difficult to obtain high speed processing.
Summary of the invention
1) first imaging signal processing circuit according to the present invention comprises:
The chrominance signal processing unit, be used to receive and also further this signal carried out the data image signal that numeral-conversion obtained, and carry out the color conversion process that is used for this data image signal is changed into luminance signal and color difference signal by the signal that vertically reads from solid-state imaging element by N-field interlacing scan method;
The compression/extension processing unit, be used to use the data image signal of this color-conversion to carry out the compression processing that is used for the estimated coding amount and obtains compression ratio thus in advance, this compression/extension processing unit is based on the compression ratio of this acquisition, further compress one data image signal in N, and generation compressing image data, wherein locate at described that, the obtaining of the data image signal in N finished obtaining this data image signal before finishing;
The Imagery Data Recording unit is used for the compressing image data to recording medium transmits and record produces; And
CPU (CPU) is used for working according to the program storage program stored, and control chrominance signal processing unit, compression/extension processing unit and Imagery Data Recording unit.
According to said structure, because obtain compression ratio in advance in handling in coding-amount-estimation compression, realize wherein carrying out order that compression handles and color-conversion process and amplification/dwindle and handle identically, and compressing image data is directly inputted to recording medium, and do not insert external memory storage.In other words, realize once, cause in each is handled dwindling, and cost reduces as the size of the external memory storage of service area by method.In addition, the number of access external memory can be reduced, and higher speed can be realized thus.
Preferably to obtain the field of finishing up to this and carry out coding-amount-estimations that is used to obtain compression ratio by the data image signal that a part and the whole horizontal pixel of whole vertical pixel or whole vertical pixel constitutes and compress processing.
In said structure, in the first prime of chrominance signal processing unit, further can provide the pixel that attenuate vertically is made of the data image signal that obtains from described solid-state imaging element and the horizontal pixel increase processing unit of the whole horizontal pixel of increases/mixing flatly.
Thus, increase in the processing unit at horizontal pixel, the depth-width ratio of estimated image can be adjusted to the depth-width ratio that the image that extracts is handled in the compression that is used for the estimated coding amount in level and the vertical direction, can reduce because the issuable error in the encoding amount of estimating of the different frequency performance in level and the vertical direction.
In addition, in said structure, CPU can adjust parameter according to the picture quality information decision encoding amount from the outside input.
In said structure, CPU uses the pre-defined algorithm encoding amount that decision is wished according to picture quality information, and the encoding amount in coding-amount-estimations compression processing of carrying out before finishing based on obtaining of the data image signal in N and the performed calculating of encoding amount of hope determine encoding amount adjustment parameter.
According to said structure, by the user number of pixels, image file size or the picture quality pattern (high image quality of picture quality information as record is set, and can produce compressing image data thus normal image quality, low image quality etc.), corresponding to the picture quality information that is provided with.
In addition, in said structure, the encoding amount when CPU can adjust the compression of parameters volume image with the encoding amount that utilizes decision compares with the encoding amount of hope, with thus according to their magnitude relationship correction predetermined algorithm.
According to said structure, correcting algorithm in each image taking.Thus, when the picture number of taking increased, encoding amount can be estimated more accurately, so that obtain the encoding amount of hope in record.
The present invention can develop into following camera arrangement.
Camera arrangement according to the present invention comprises:
Solid-state imaging element, the light that is used for receiving by phtographic lens change the signal of telecommunication into and export the signal of telecommunication as picture signal;
A/D conversion circuit is used for changing the picture signal numeral into data image signal; And
Any aforesaid imaging signal processing circuit.
To understand attached purpose of the present invention and advantage from its detailed description of preferred embodiment, understand the preferred embodiment with reference to the accompanying drawings more thoroughly.
Description of drawings
Fig. 1 is the structured flowchart of explanation camera arrangement, and imaging signal processing circuit according to a preferred embodiment of the invention wherein has been installed.
Fig. 2 is the legend according to the data flow of this embodiment.
Fig. 3 is the legend according to three of the first embodiment of the present invention-field acquisition methods.
Fig. 4 is in according to three of first embodiment-field acquisition methods, from the legend of the dateout of solid-state imaging element.
Fig. 5 is the legend of a five-acquisition methods according to a second embodiment of the present invention.
Fig. 6 is in according to five of second embodiment-field acquisition methods, from the legend of the dateout of solid-state imaging element.
Fig. 7 is the flow chart of learning sequence that is used to improve the accuracy of estimated coding amount according to a fifth embodiment of the invention.
Fig. 8 is in according to three of the 5th embodiment-field acquisition methods, is used to improve the flow chart of learning sequence of the accuracy of estimated coding amount.
Fig. 9 is the structured flowchart of the camera arrangement of explanation correlation technique.
Figure 10 is the legend of the data flow in the camera arrangement of correlation technique.
Figure 11 is the legend according to three of correlation technique-field acquisition methods.
Figure 12 is the legend according to five of correlation technique-field acquisition methods.
Embodiment
Below, reference diagram is described the preferred embodiment according to imaging signal processing circuit of the present invention in detail.
Fig. 1 is the structured flowchart of explanation camera arrangement, comprising the imaging signal processing circuit according to preferred embodiment.Camera arrangement comprises phtographic lens 11, solid-state imaging element 12, solid-state imaging element driver element 13, analogy signal processing unit 14, analog/digital conversion unit 15, imaging signal processing circuit 100, external memory storage 31, recording medium 32, program storage 33 and picture quality choice device 34.For example, can adopt CCD as solid-state imaging element 12.For example, can adopt DRAM (dynamic random access memory) as external memory storage 31.
Imaging signal processing circuit 100 is formed by LSI, and comprises that horizontal pixel increases processing unit 21, chrominance signal processing unit 22, Image Data Compression/extension process unit 23, Imagery Data Recording unit 24, demonstration/output unit 25 and CPU26.
Chrominance signal processing unit 22 changes data image signal into luminance signal and color difference signal, and execution is used for signal being amplified/being reduced to the look-conversion process that can select size.The compression that compression/extension processing unit 23 uses the data image signal of color-transformation to carry out the compression ratio that is used for the estimated coding amount and obtains in advance thus to adopt at compressing image data is handled, and uses the compression ratio that obtains to carry out volume image (body image) compression and handle.Data processing unit 24 is carried out the medium transmission processing that is used for compressing image data is sent to medium.Demonstration/output unit 25 is carried out the demonstration/output processing that is used for view data is outputed to external device (ED).Chrominance signal processing unit 22, compression/extension processing unit 23, Imagery Data Recording unit 24 and demonstration/output unit 25 are controlled by CPU26.It is to be used for vertically attenuate pixel 1/N (N 〉=2) and the whole horizontal pixel of increase/mixing flatly to the circuit of N pixel that horizontal pixel increases processing unit 21.It is not the element that must provide that horizontal pixel increases processing unit 21.
Picture quality choice device 34 is the mechanisms that use switch or menu to select by the user, wherein the user selects number of pixels to be recorded, image file size or picture quality pattern (high image quality, normal image quality, low image quality etc.), and the picture quality information of selecting is transferred to CPU26.
Next, description is according to the operation of the camera arrangement of the present embodiment with said structure.Fig. 2 shows according to the flow chart of data processing in the camera arrangement of present embodiment.
The image of photographic transmits by phtographic lens 11, be focused on the solid-state imaging element 12, and based on the driving sequential of solid-state imaging element driver element 13 by opto-electronic conversion, to export as analog signal thus.Next, this analog signal simulated signal processing unit 14 amplifications and stands noise remove etc., and changes data image signal into by analog/digital conversion unit 15.
Imaging signal processing circuit 100 uses external memory storage 31 as the service area, and with the input data image signal change view data (coded data) into, the picture signal that changes data image signal by analog/digital conversion unit 15 into is transfused to imaging signal processing circuit 100.Describe the operation of imaging signal processing circuit 100 below in detail.
Data image signal transmits by horizontal pixel increases processing unit 21, and is input to chrominance signal processing unit 22.Then, data image signal stands color-conversion process by chrominance signal processing unit 22, so that be produced as the picture signal of luminance signal and color difference signal.The picture signal of amplifying in case of necessity or reducing to produce.For display image data on such as the external device (ED) of monitor and with Image Data Compression is record data, and color-conversion process is essential.The data image signal of color-conversion is sent to demonstration/output unit 25 and compression/extension processing unit 23.Picture signal is compressed by JPEG by compression/extension processing unit 23, and exported as the view data of compression.If necessary, the view data of compression is expanded.The view data of compression is recorded on the recording medium 32 by Imagery Data Recording unit 24.Be shown output unit 25 demonstration/outputs from the view data of chrominance signal processing unit 22 outputs.
First embodiment
Fig. 3 shows when adopting three-field to obtain (three-field fetching) method as the first embodiment of the present invention, the processing sequence of camera arrangement.At first, describe three-data acquisition process in the acquisition methods with reference to figure 4.
In a three-acquisition methods, every 3n bar line output is from the picture signal of solid-state imaging element.Order according to first 1b, second 1c and the 3rd 1d is obtained picture signal 1a.At first, first data image signal is introduced in the external memory storage 31.
Under the situation that provides horizontal pixel to increase processing unit 21, the field data of increase/mixing flatly and/or non-increase/field data of non-mixing is acquired.
Next, be introduced into external memory storage 31 with second field data and walk abreast, read first field data from external memory storage 31, and stand color-conversion process by chrominance signal processing unit 22.In brief, generation is the picture signal of luminance signal and color difference signal.
Next, the luminance signal of generation and color difference signal are imported into the compression/extension processing unit 23 that compresses therein, so that carry out the compression processing that is used for the estimated coding amount and obtains compression ratio thus.Be used for the compression processing that the estimated coding amount also obtains compression ratio thus, be meant the Image Data Compression processing of carrying out in advance, in compressing image data so that the compression ratio that acquisition is used.The compression processing that is used for the estimated coding amount and obtains compression ratio thus wherein uses result to carry out the processing that obtains to be used for the required compression ratio of compressing image data for being essential with Image Data Compression to certain size or optional size.
In addition, first field data that use is read from external memory storage 31 is carried out breviary (thumb nail) color-conversion process, and picture signal changed into luminance signal and color difference signal, and the size that changes vertical 16 pixels and level 120 pixels into, and this size is the breviary size.Breviary color-conversion process is needs for the data record that meets such as being used for camera Design of File Systems rule (DCF) and figure punch order format (DPOF) standard, and result is used for compressing thumbnail image data and demonstration/output thumbnail image.
Based on the generation of thumbnail image data, digitally reduce (thinned) pixel in a horizontal direction, by adjustment visual angles such as increase/mixed processing, and produce luminance signal and the color difference signal that breviary uses.Under the situation that provides horizontal pixel to increase processing unit 21, digitally adjust the angle of observing and become unnecessary, because increase/mixed pixel in a horizontal direction, and the angle of observing is adjusted.
Next, luminance signal that breviary uses and color difference signal are imported into the compression/extension processing unit 23 that compresses therein, and thumbnail image is by data-compression.For the data record that meets as DCF and DPOF standard, the thumbnail image data compression is essential.Result is used to carry out the transmission relevant with recording medium and handles.The thumbnail image data that produces is sent to recording medium 32.
Next, parallel with obtaining of the 3rd field data, obtain first field data and/or second field data from external memory storage 31 corresponding to vertical direction.Thus, realize continuous data image signal one by one.Each of the continuous number picture signal that realizes stands the body colour signal processing by 22 execution of chrominance signal processing unit.In brief, generation is the picture signal of luminance signal and color difference signal.
Next, above-mentioned consecutive image signal partly or entirely be imported into therein the compression compression/extension processing unit 23, thereby the compression body image.Based on CPU control, via the compressing image data of Imagery Data Recording unit 24 volume image of recording compressed on recording medium 32.
In the present embodiment, the compression that also obtains compression ratio in the estimated coding amount of carrying out in advance that is used for is thus handled, and has determined compression ratio.Therefore, carry out the compression of coding-amount-estimation and handle,, become and there is no need thereby the data image signal of color-conversion is turned back to external memory storage 31 so that volume image can be compressed for the same with correlation technique.Thus, can reduce the number of the bus access relevant, and can be beneficial to reduce power consumption with external memory storage 31.In addition, because handling, the compression that is used for estimated coding and obtains compression ratio thus finishes, so can improve processing speed.In addition, it is possible rewriteeing the code title data by CPU26 on recording medium 32.
In the present embodiment, because handling, breviary color-conversion process and thumbnail image data compression carried out in advance, so can produce thumbnail image data in advance.As a result, for example, when generation met view data such as DCF and DPOF standard, the compression body data can directly be sent to recording medium 32, and do not turn back to external memory storage 31, because produced thumbnail image data at that time.Thus, can reduce the visit number relevant, and can increase processing speed with external memory storage.
Use is introduced into first field data in the external memory storage 31, and description is used for the estimated coding amount and obtains the order of the compression processing of compression ratio, thumbnail image data compression processing etc. thus.But, as shown in Figure 2, provide directapath in the present embodiment from CCD to YC/ZOOM.Therefore, can be parallel with obtaining of first field data, use first field data to carry out and be used for compression processing and the thumbnail image data compression processing that the estimated coding amount also obtains compression ratio thus.In above-mentioned situation, can be parallel with obtaining of second field data, use these data further to carry out coding-amount-estimation compression and handle, up to second.In said method,,, therefore can accurately calculate compression ratio owing to repeatedly carry out coding-amount-estimation compression although because coding-amount-estimation is compressed processing execution repeatedly, and the increase of power consumption is inevitable.Thus, can realize compressing with the volume image of more suitable compression ratio.
Under the situation that provides horizontal pixel to increase processing unit, in order to carry out breviary color-conversion process, thumbnail image data compression processing, body colour conversion process and to be used for the compression processing that the estimated coding amount also obtains compression ratio thus, there is no need to use the pixel of mixing.Can suitably select the pixel of mixing and the pixel of non-mixing.
According to present embodiment, carry out the compression of breviary color-conversion process and thumbnail image data in advance and handle so that view data can writing recording medium in, and do not turn back to external memory storage.Thus, can reduce the visit number relevant with external memory storage.In addition, can minification in each is handled as the external memory storage of service area, reduce cost thereby be beneficial to.
Because in the compression of coding-amount-estimation is handled, obtain compression ratio in advance, therefore can realization carry out simultaneously that compression processing and view data are directly inputted into recording medium and the order that stays out of external memory storage with color conversion process and amplification/dwindle processing.More particularly, can realize once by (one-pass) method, can minification in each is handled as the external memory storage of service area, can realize reducing cost.In addition, can reduce the visit number relevant, obtain higher speed thus with external memory storage.
In addition, in the horizontal pixel attached processing unit, the depth-width ratio of the estimated image in level and the vertical direction (aspect ratio) can be adjusted to the depth-width ratio of obtaining image in coding-amount-estimation compression processing.Thus, can reduce owing to the different frequency performance in level and the vertical direction, issuable error in the estimated coding amount.
Second embodiment
As the second embodiment of the present invention, Fig. 5 shows the processing sequence of the camera arrangement when adopting five-field acquisition methods.At first, describe five-data acquisition process in the acquisition methods with reference to figure 6.In a five-acquisition methods, every 5n bar line output is from the picture signal of solid-state imaging element.Order with first 2b, second 2c, the 3rd 2d, the 4th 2e and the 5th 2f is obtained picture signal 2a.At first, first field data is introduced in the external memory storage 31.
With with first embodiment in similar method, handle first field data and second field data, after this parallel with obtaining of the 3rd field data, read first field data and/or second field data from external memory storage 31 corresponding to vertical direction.The data of reading then, stand color conversion process, are used for compression processing, breviary color conversion process and thumbnail image data compression processing that the estimated coding amount also obtains compression ratio thus.
Use similar method, parallel with obtaining of the 4th field data, obtain corresponding to first field data of vertical direction and/or second field data or/and the 3rd field data from external memory storage 31, and the compression processing, breviary color conversion process and the thumbnail image data compression that stand color conversion process, be used for the estimated coding amount and obtain compression ratio are thus handled.Thus, realize continuous data image signal in turn, and the continuous number picture signal of each realization is carried out the body colour conversion process by chrominance signal processing unit 22.Remaining structure is corresponding to the description of first embodiment.
The 3rd embodiment
As the third embodiment of the present invention, for example, in the processing sequence in a three-acquisition methods shown in Figure 3, when being acquired for second, can use the first field picture data to carry out the preliminary treatment of handling such as optical black level (Optical Black) clamp (clamp).It is to be used to use the light shield district that the OB clamp is handled, and proofreading and correct black level that is reference level is the processing of steady state value.This correction does not need the data of all, but, use the data in whole zone with gap.Therefore, this correction can suitably be carried out, and compares with correlation technique and can increase processing speed significantly.
The 4th embodiment
As the fourth embodiment of the present invention, for example, in the processing sequence in a three-acquisition methods shown in Figure 4, when being acquired for second, can using the first field picture data to carry out and handle such as the luminosity of white balance (WB) processing.It is that the white balance gains adjustment is handled that WB handles, and wherein adjusts the ratio of color difference signal based on view data.This adjustment does not need the data of all, but, use the data in whole zone with gap.Therefore, this adjustment can suitably be carried out, and compares with correlation technique and can increase processing speed significantly.
The 5th embodiment
As the fifth embodiment of the present invention, with reference to the flow chart of figure 7, description is used to improve the estimation learning sequence of the accuracy of the encoding amount of the volume image of shooting at every turn.
CPU26 is according to program (pre-defined algorithm) work that is used to be provided with encoding amount adjustment parameter of storage in program storage 33.
In step S1, select picture quality by picture quality choice device shown in Figure 1 34.Picture quality is meant number of pixels to be recorded, image file size or the picture quality pattern of being selected by the user (high image quality, normal image quality, low image quality etc.).In step S2, CPU26 prepares to wish the compression ratio of encoding amount number and thumbnail image about the estimation of number of pixels to be recorded.The recording pixel of similar number can require different compression ratios.In step S3, CPU26 carries out coding-amount-estimation compression to thumbnail image and handles.At step S4, according to pre-defined algorithm, the operation encoding amount is adjusted parameter.In operational processes, the ratio of the number of pixels of the actual coding amount of the thumbnail image that compression obtains in handling based on coding-amount-estimation and the thumbnail image relevant, the estimated coding amount of acquisition volume image with the number of pixels of volume image.Then,, change in the thumbnail image the actual encoding amount that uses and adjust parameter, adjust parameter with the decision encoding amount based on difference between the encoding amount of the estimated coding amount of volume image and hope.In step S5, adjust the compression of parameters volume image based on the encoding amount that in step S4, determines.In step S6, the volume image of recording compressed, and the encoding amount of memory bank image.
In step S7, the encoding amount in the compression body image and the encoding amount of hope compare mutually, and stop this order when the encoding amount of the encoding amount of volume image and hope equates, are fully accurately because estimate under the sort of situation.When they not simultaneously, in S8, the encoding amount in the compression body image and the encoding amount of hope compare mutually.When the encoding amount in the compression body image during greater than another, parameter is corrected, so that increase compression ratio in step S9, parameter is corrected simultaneously, with the encoding amount in the convenient compression body image hour, reduces compression ratio in step S10.When correction parameter thus, the encoding amount in the compression body image can be near the encoding amount of wishing.
In step S11, CPU26 is stored in the parameter correction amount that obtains among step S9 or the S10.CPU26 analyzes the performance of each image such as the distribution of color and the composition (for example, personage/landscape) of each photography, and stores the analysis result as additional information therein.At step S12, CPU26 judges whether to proofread and correct the study and the algorithm that are used to be provided with encoding amount adjustment parameter based on a plurality of parameter correction results and the performance of obtaining image, and image is stored with every pictures.When the content of record seldom the time, the storage data totally be little.In order to prevent to provide step S12, so that study is based on the hope number of content of shooting owing to learning algorithm difference based on peanut.When determining that study and algorithm are corrected, in step S13, come correcting algorithm or operation expression by the feedback in the direction that concentrates on smaller value at correcting value.
Omit step S11 to S13, correction parameter in each photography, this also is effective.
Fig. 8 shows three-adopt the order under the situation of present embodiment in the processing sequence in the acquisition methods.Repeat n time (n is equal to or greater than two natural number) if take, the sample number of the storage data that are used to learn is n-1.Along with filming frequency n increases, the sample number also increases, and produces the desired value that is used to improve accuracy.
When power supply or system is activated or when not using relative program, by CPU26 correcting algorithm and operation expression among stored parameters and parameter correction amount and the step S12 among the write step S11 in program storage 33, read from program storage 33 then, and when executive program next, use.
According to present embodiment, when parameter was corrected and utilizes each shooting to revise algorithm, because content of shooting increases, so the accuracy of estimated coding amount was enhanced, and the encoding amount that can obtain to wish thus in the recording operation relevant with recording medium.
Each element that constitutes each embodiment can be realized by the software in the microcomputer.
The present invention is not limited to the embodiment of description, and can make amendment and realize with different modes in true spirit and the scope of invention.
As so far describing, effectively as being installed in imaging signal processing circuit in the camera arrangement etc., wherein external memory storage has low capacity according to imaging signal processing circuit of the present invention, and the less quilt of external memory storage is visited frequently, and realizes high speed operation.
Claims (21)
1. imaging signal processing circuit comprises:
The chrominance signal processing unit, be used to receive to carrying out the data image signal that digital translation obtained by the signal that vertically reads from solid-state imaging element, and carry out the color conversion process that is used for this data image signal is changed into luminance signal and color difference signal by N field interlacing scan method;
The compression/extension processing unit, the compression that is used to use data image signal after the color conversion process to carry out to be used for the estimated coding amount and obtains compression ratio is thus in advance handled, this compression/extension processing unit is based on the compression ratio of this acquisition, further compress one data image signal in N, and generation compressing image data, wherein locate at described that, the obtaining of the data image signal in N finished obtaining this data image signal before finishing;
The Imagery Data Recording unit is used for transmitting and write down the compressing image data of this generation to recording medium;
And
CPU is used for basis and works in the program storage program stored, and controls this chrominance signal processing unit, this compression/extension processing unit and this Imagery Data Recording unit.
2. imaging signal processing circuit according to claim 1, this compression/extension processing unit wherein is to carrying out the compression that is used for the estimated coding amount and obtains compression ratio thus and handle up to finishing the data image signal field that obtains, that be made of a part and the whole horizontal pixel of whole vertical pixel or whole vertical pixel.
3. imaging signal processing circuit according to claim 1, wherein in the first prime of this chrominance signal processing unit, provide be used for the pixel that will constitute by the data image signal that obtains from described solid-state imaging element vertically attenuate 1/N and the whole horizontal pixel of increases/mixing flatly to the horizontal pixel increase processing unit of N pixel.
4. imaging signal processing circuit according to claim 3, this compression/extension processing unit wherein, to finish up to this field that obtains, carry out the compression processing that is used for the estimated coding amount and obtains compression ratio thus by the part of whole vertical pixel or vertical pixel with by the data image signal that the pixel that this horizontal pixel increases processing unit and flatly increases/mixes constitutes.
5. imaging signal processing circuit according to claim 1 wherein provides the demonstration/output unit that is used for the picture signal of this chrominance signal processing unit is outputed to external device (ED).
6. imaging signal processing circuit according to claim 1, wherein with N in data image signal obtain parallel, this compression/extension processing unit is based on handle the compression ratio that obtains in the compression that is used for the estimated coding amount, use the data image signal of the whole pixel in N to carry out data compression, to produce the view data of compression thus.
7. imaging signal processing circuit according to claim 1, compression processing before wherein the data image signal of this compression/extension processing unit use in N obtains and finish, that the described data image signal execution up to the field that finishing of (N-1) field obtained is used to produce thumbnail image data.
8. imaging signal processing circuit according to claim 7, wherein this Imagery Data Recording unit transmit this generation thumbnail image data to this recording medium, and stay out of external memory storage.
9. imaging signal processing circuit according to claim 1, wherein this chrominance signal processing unit uses up to this described data image signal of finishing the field that obtains and carries out the processing of optical black level clamp.
10. imaging signal processing circuit according to claim 1, wherein this chrominance signal processing unit uses up to this described data image signal of finishing the field that obtains and carries out the white balance processing.
11. imaging signal processing circuit according to claim 1, wherein this CPU adjusts parameter according to the picture quality information decision encoding amount of input from the outside.
12. imaging signal processing circuit according to claim 11, wherein this picture quality information comprises number of pixels to be recorded or picture quality pattern at least.
13. imaging signal processing circuit according to claim 11, wherein this CPU uses the encoding amount that pre-defined algorithm is wished according to this picture quality information decision, and decide encoding amount to adjust parameter based on the performed calculating of encoding amount of encoding amount and this hope, wherein this encoding amount is the encoding amount of obtaining of the data image signal in N compression processing of the performed estimated coding amount that is used for before finishing.
14. imaging signal processing circuit according to claim 13, the encoding amount when wherein this CPU will utilize the encoding amount that is determined to adjust the compression of parameters volume image and the encoding amount of hope compare, and revise predetermined algorithm according to their magnitude relationship.
15. imaging signal processing circuit according to claim 13, wherein in repeatedly photographing, the information and the encoding amount that concern between the encoding amount of the CPU encoding amount in the storage representation compression body image and hope in program storage are adjusted parameter, and revise pre-defined algorithm based on the information of this relation of expression.
16. imaging signal processing circuit according to claim 15, wherein in photography repeatedly, CPU also in program storage storage representation obtained the information of the feature of image, and additionally with reference to the feature modification pre-defined algorithm that has obtained image.
17. a camera arrangement comprises:
Solid-state imaging element, the light that is used for receiving via phtographic lens change the signal of telecommunication into and export this signal of telecommunication as picture signal;
A/D conversion circuit is used for changing this picture signal numeral into data image signal; And
The described imaging signal processing circuit of claim 1.
18. a camera arrangement comprises:
Solid-state imaging element, the light that is used for receiving via phtographic lens change the signal of telecommunication into and export this signal of telecommunication as picture signal;
A/D conversion circuit is used for changing this picture signal numeral into data image signal; And
The described imaging signal processing circuit of claim 3.
19. a camera arrangement comprises:
Solid-state imaging element, the light that is used for receiving via phtographic lens change the signal of telecommunication into and export this signal of telecommunication as picture signal;
A/D conversion circuit is used for changing this picture signal numeral into data image signal; And
The described imaging signal processing circuit of claim 5.
20. a camera arrangement comprises:
Solid-state imaging element, the light that is used for receiving via phtographic lens change the signal of telecommunication into and export this signal of telecommunication as picture signal;
A/D conversion circuit is used for changing this picture signal numeral into data image signal; And
The described imaging signal processing circuit of claim 13.
21. a camera arrangement comprises:
Solid-state imaging element, the light that is used for receiving via phtographic lens change the signal of telecommunication into and export this signal of telecommunication as picture signal;
A/D conversion circuit is used for changing this picture signal numeral into data image signal; And
The described imaging signal processing circuit of claim 14.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004203005 | 2004-07-09 | ||
| JP2004203005 | 2004-07-09 | ||
| JP2005193902 | 2005-07-01 |
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| CN1719867A CN1719867A (en) | 2006-01-11 |
| CN100397867C true CN100397867C (en) | 2008-06-25 |
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| CNB2005100793818A Expired - Fee Related CN100397867C (en) | 2004-07-09 | 2005-07-11 | Imaging signal processing circuit and camera system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06165111A (en) * | 1992-11-25 | 1994-06-10 | Nec Corp | Image compressing/extending device |
| JP2003101889A (en) * | 2001-09-25 | 2003-04-04 | Konica Corp | Electronic camera |
| CN1455601A (en) * | 2002-05-01 | 2003-11-12 | 佳能株式会社 | Photographic device, photographic method, programme and recording medium |
| JP2004023745A (en) * | 2002-06-20 | 2004-01-22 | Ricoh Co Ltd | Digital camera |
-
2005
- 2005-07-11 CN CNB2005100793818A patent/CN100397867C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06165111A (en) * | 1992-11-25 | 1994-06-10 | Nec Corp | Image compressing/extending device |
| JP2003101889A (en) * | 2001-09-25 | 2003-04-04 | Konica Corp | Electronic camera |
| CN1455601A (en) * | 2002-05-01 | 2003-11-12 | 佳能株式会社 | Photographic device, photographic method, programme and recording medium |
| JP2004023745A (en) * | 2002-06-20 | 2004-01-22 | Ricoh Co Ltd | Digital camera |
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| CN1719867A (en) | 2006-01-11 |
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