CN103414854A - System-on-chip with image processing function and operation method thereof - Google Patents
System-on-chip with image processing function and operation method thereof Download PDFInfo
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Abstract
The invention provides a system-on-chip with the image processing function. The system-on-chip comprises a main processor, an image sensor interface module, an image signal processing module and a coprocessor, wherein the main processor is constructed to control the overall operation of the system-on-chip; the image sensor interface module is constructed to receive image data from an image sensor of the system-on-chip and execute image data format conversion to convert the received images into image signals; the image signal processing module is constructed to receive the image signals after the conversion from the image sensor interface module and execute image processing on the received image signals; the coprocessor is constructed to control the image sensor interface module and the image signal processing module to operate.
Description
Technical field
The present invention relates to a kind of SOC (system on a chip) with image processing function, more particularly, relate to a kind of SOC (system on a chip) with independent coprocessor of processing for image.
Background technology
At present, the solution of image-signal processing system (ISP system) generally can be divided into two kinds.A kind of scheme is, image processing module and imageing sensor (for example, camera) are combined and be arranged at outside, and the picture signal after then by sheet mountain system system (SoC), image processing module being processed is processed; And another kind of scheme is, will in the picture signal processing module, be seated in SoC inside, SoC directly receives the signal that imageing sensor transmits.When the picture signal processing module is placed on SOC inside, generally by host CPU, be configured control.
Fig. 1 is the block diagram illustrated according to the SoC of prior art.SoC shown in Figure 1 is the SoC based on first scheme as above.As shown in Figure 1, the SoC10 with image processing function of prior art comprises primary processor (for example, CPU) 11 and image-signal processing system 12.
View data by 20 sensings of outside imageing sensor is sent to image-signal processing system 12, then by primary processor 11, controls image-signal processing system 12 and processes the picture signal received.
But along with the raising of semiconductor integrated degree, the operation that SoC will carry out is also more and more, thereby increased the weight of the burden of primary processor.Therefore, when the load of primary processor is very heavy, can cause the picture signal handling property to descend.And primary processor energy consumption when processing picture signal is excessive.
Summary of the invention
In view of the above-mentioned problems in the prior art, the invention provides a kind of SOC (system on a chip) with independent coprocessor of processing for image.
According to an aspect of the present invention, provide a kind of SOC (system on a chip) with image processing function to comprise: primary processor is constructed to control the integrated operation of described SOC (system on a chip); The image sensor interface module, be constructed to, from the imageing sensor reception view data the carries out image Data Format Transform that are connected to described SOC (system on a chip), the view data of reception is converted to picture signal; The picture signal processing module, be constructed to receive picture signal the picture signal carries out image processing to receiving through conversion from described image sensor interface module; Coprocessor, be constructed to the operation of control chart image-position sensor interface module and picture signal processing module.
Preferably, when described starting system on chip, coprocessor is carried out the initial configuration for image sensor interface module and picture signal processing module, and processes and put the operation that configuration information determines that the picture signal processing module will be carried out according to image.
Preferably, when described starting system on chip, coprocessor finds that by imageing sensor operation determines the characteristic of the imageing sensor connected, and according to the characteristic of the imageing sensor of determining and the picture signal form that the picture signal form after the conversion of the view data reception form of configuration image sensor interface module and image sensor interface module and picture signal processing module receive.
Preferably, the image sensor interface module comprises: high-speed interface receives the serial high speed image data from described imageing sensor; String parse module, tell view data to be converted to the parallel image data serial of reception; Calibration module, be converted to picture signal according to the configuration of coprocessor by the parallel image data.
Preferably, coprocessor is carried out the initial configuration for image sensor interface module and picture signal processing module by configuring corresponding register.
According to a further aspect in the invention, a kind of operation method with SOC (system on a chip) of image processing function is provided, it comprises the steps: to process starting command in response to the association of master controller, and coprocessor is carried out the initial configuration for image sensor interface module and picture signal processing module; In response to the image that carrys out autonomous controller, process initiation command, coprocessor control image sensor interface module and the operation of picture signal processing module carries out image processing.
Preferably, described operation method also comprises: in response to the order of weighing about transferring the image processing controls that carrys out autonomous controller, coprocessor stops the control for the image processing operations of image sensor interface module and picture signal processing module, by the image processing operations of main controller controls for image sensor interface module and picture signal processing module.
Preferably, the step of described execution initial configuration comprises: coprocessor finds to operate by imageing sensor the characteristic of determining the imageing sensor connected; Coprocessor is according to the characteristic of the imageing sensor of determining and the view data of configuration image sensor interface module receives form.
Preferably, the step of described execution initial configuration also comprises: coprocessor is according to the characteristic of described imageing sensor and the picture signal form that the picture signal form after the conversion of configuration image sensor interface module and picture signal processing module receive.
Preferably, the step of described execution initial configuration comprises: coprocessor is processed and to be put configuration information and determine what the picture signal processing module will be carried out according to image.
As mentioned above, according to the SOC with image processing function proposed by the invention, SOC has comprised dedicated coprocessor.When dedicated coprocessor carries out image signal initial configuration, host CPU can walk abreast and carry out other work, has reduced the load of host CPU, has promoted the performance of host CPU.Simultaneously, when dedicated coprocessor was controlled, host CPU can be in idle condition, had fully reduced system power dissipation, had promoted the independence of image-signal processing system.In addition, this SoC also can be configured to primary processor and controls whole built-in image-signal processing system, thereby has greatly promoted the flexibility of software solution.
The accompanying drawing explanation
By the description of embodiment being carried out below in conjunction with accompanying drawing, these and/or other aspect of the present invention and advantage will become clear and be easier to and understand, wherein:
Fig. 1 is the block diagram illustrated according to the SOC (system on a chip) with image processing function (SoC) of prior art;
Fig. 2 is the block diagram illustrated according to the SOC (system on a chip) with image processing function (SoC) of an exemplary embodiment of the present invention;
Fig. 3 is the block diagram that the image sensor interface module of SoC shown in Figure 2 is shown;
Fig. 4 is the flow chart illustrated according to the operation method of the SOC (system on a chip) with image processing function (SoC) of an exemplary embodiment of the present invention.
Embodiment
According to SOC (system on a chip) of the present invention (SoC), will reduce the burden of primary processor by the independent coprocessor that is configured to the image processing.That is, master controller can only send image processing command and receive processing result image from coprocessor to coprocessor, and does not participate in concrete image processing operations, thereby has alleviated the burden of master controller.Simultaneously, described primary processor can for example, participate in image processing operations according to configuration (, user's selection).
According to SoC of the present invention, when SoC starts, for example, by the coprocessor configuration module relevant to image processing operations, image sensor interface module and picture signal processing module.Then, when the picture signal processing command received from primary processor, carry out respective operations by coprocessor control image sensor interface module and picture signal processing module.For example, start carries out image data receiver and conversion operations by coprocessor command image sensor interface module, command diagram image signal processing module starts the carries out image signal processing operations simultaneously.In addition, can arrange according to the user, the operation that above-mentioned association processes can be carried out by primary processor.
Below, the embodiment of the present invention is described in detail, in the accompanying drawings, wherein, identical label means same parts to its example shown all the time.Below with reference to the accompanying drawings embodiment is described to explain the present invention.
Fig. 2 is the block diagram that the SOC (system on a chip) (SoC) according to exemplary embodiment of the present invention is shown.As shown in Figure 2, according to the SoC100 according to exemplary embodiment of the present invention, comprise primary processor 110, system control module 120, memory control module 130, the first bridge module 140, image sensor interface module 150, the second bridge module 160, picture signal processing module 170 and coprocessor 180.
In addition, as shown in Figure 2, described SoC also comprises the first bus B US1, the second bus B US2 and the 3rd bus B US3.
The first bridge module 140 and the second bridge module 150 are carried out the conversion of different bus data protocol.For example, the bus data protocol conversion that the first bridge module 140 is carried out between the first bus B US1 and the second bus B US2, will be delivered to from the data of the second bus B US2 device or the module that is connected to the first bus B US1 or will be delivered to from the data of the first bus B US1 device or the module that is connected to the second bus B US2.The bus data protocol conversion that the second bridge module 160 is carried out between the second bus B US2 and the 3rd bus B US3, will be delivered to from the data of the second bus B US2 will be delivered to from the data of the 3rd bus B US3 the device or the module that are connected to the second bus B US2 device or the module that is connected to the 3rd bus B US3.
Image sensor interface module 150 is constructed to, from the imageing sensor 200 reception view data the carries out image Data Format Transform that are connected to described SoC100, the view data of reception is converted to picture signal.
One of the not shown image sensor interface module 150 shown in Figure 2 of Fig. 3 forms the block diagram of example.As shown in Figure 3, image sensor interface 150 comprises high-speed interface 151, string parse module 152 and calibration module 153.
High-speed interface 151 can receive the high-speed view data of serial from described imageing sensor 200.String parse module 152 can be converted to the parallel image data by the serial high speed image data that high-speed interface 151 receives.Calibration module 153 can be converted to picture signal by parallel data according to the configuration of the coprocessor 180 that will be described below.
Picture signal processing module 170 is constructed to the picture signal the picture signal carries out image processing to receiving that from described image sensor interface module 150, receive through conversion.
Simultaneously, after SoC100 started, while namely moving, coprocessor 180 can be controlled image sensor interface module 150 and the performed operation of picture signal processing module 170.
When SoC100 started, coprocessor 180 was according to the characteristic of imageing sensor 200 and the view data of configuration image sensor interface module 150 receives form.Because different imageing sensor 200 can be connected to SoC100, therefore the SoC100 view data that will receive, be that the image data format that imageing sensor 200 is exported can be also all kinds, therefore need at first judge the image data format that imageing sensor 200 is exported.For this reason, when SoC100 started, coprocessor 180 was found to operate by image sensor interface and is found the imageing sensor 200 connected, and the characteristic of definite imageing sensor 200.
Interchangeable, when SoC100 started, coprocessor 180 can be gone back the picture signal form after the conversion of configuration image sensor interface module 150 according to the characteristic of imageing sensor 200.
In addition, when SoC100 starts, the operation that coprocessor 180 will be carried out according to image processing configuration information configuration picture signal processing module 170.Here, the operation that the picture signal processing module will be carried out comprises at least a in automatic focusing, automatic exposure, white balance and special-effect application, but is not limited to this.
In addition, after SoC100 started, namely after picture signal processing module 170 started executable operations, when the change of image processing configuration information being detected, coprocessor 180 reconfigured picture signal and processes the operation that will carry out.
Here, when SoC100 started, coprocessor 180 can be carried out the initial configuration for image sensor interface module 150 and picture signal processing module 170 by configuring corresponding register.
In addition, the picture signal that image signal processing module 170 will complete the picture signal processing sends coprocessor 180 to, and coprocessor 180 for example, via the 3rd bus B US3 and the second bridge module 150, goes out to give primary processor 110 by picture signal.
Although in above-described example, by initial configuration and the process control of coprocessor 180 execution for image sensor interface module 150 and picture signal processing module 170, but primary processor 110 can be carried out above-mentioned initial configuration and process control for image sensor interface module 150 and picture signal processing module 170 according to user's setting.
Namely, primary processor 110 can send about transferring the order of image processing controls power to coprocessor 180 according to the instruction from the user, and the coprocessor 180 that receives this image processing operations order will stop the image processing controls, and send the control transfer message as the response of above-mentioned order about transfer image processing controls power to main processing 110.
After receiving this control transfer message, because SoC100 starts, thus do not need to carry out initial configuration, so primary processor 110 is only carried out for image sensor interface module 150 and 170 process control of picture signal processing module.When SoC100 startup next time, the initial configuration that primary processor 100 is carried out for image sensor interface module 150 and picture signal processing module 170.
Below, with reference to Fig. 4, the operation method according to the SOC (system on a chip) with image processing function (SoC) of an exemplary embodiment of the present invention is described.Here, in conjunction with Fig. 2, described operation method is described.
In step 410, after receiving the SoC starting command, primary processor 110 and coprocessor 180 start.
Here, after receiving the SoC starting command, primary processor 110 starts and sends association to coprocessor 180 processes starting command, and coprocessor 180 is carried out startup after receiving this coprocessor starting command.
In step 420, the initial configuration of coprocessor 180 carries out image sensor interface modules 150 and picture signal processing module 170.
As above described in conjunction with Figure 2, coprocessor 180 can be carried out above-mentioned initial configuration by configuring corresponding register.
Simultaneously, coprocessor 180 can find to operate the imageing sensor 200 of finding connection by the carries out image sensor interface, determine the characteristic of imageing sensor 200, and according to the characteristic of imageing sensor 200 and the view data of configuration image sensor interface module 150 receives form.Can be still image signal format by the picture signal format setting via after image sensor interface module 150 conversion, therefore when initial configuration without configuration image signal format.
Interchangeable, coprocessor 180 is the picture signal form after the conversion of configurable image sensor interface module 150 also.Now, coprocessor 180 is the picture signal form that receives of configurable picture signal processing module 170 also, with notice picture signal processing module 170, will receive the picture signal of which kind of form.
The operation that coprocessor 180 also will be carried out according to the image processing configuration information configuration picture signal processing module 170 set in advance.As mentioned above, the operation that the picture signal processing module will be carried out comprises at least a in automatic focusing, automatic exposure, white balance and special-effect application, but is not limited to this.
In step 430, coprocessor 180 determines that 110 orders are that image is processed initiation command or the order of weighing about transferring the image processing controls from primary processor.
If receive image in step 430, process initiation command (for example, starting the order of taking or photographing), in step 440, coprocessor 180 control chart image-position sensor interface modules 150 and the 170 carries out image processing operations of picture signal processing module.
Picture signal processing module 180 can be carried out predetermined picture signal according to initial configuration and process operation, and will complete picture signal and process the picture signal of operation and send coprocessor 180 to.
Coprocessor 180, for example via the 3rd bus B US3 and the second bridge module 150, goes out to give primary processor 110 by the picture signal that completes picture signal processing operation.
If receive about transferring the order of image processing controls power in step 430, in step 450, receive this coprocessor 180 about the order of transfer image processing controls power and will stop the image processing controls, and send the control transfer message as the response of above-mentioned order about transfer image processing controls power to main processing 110.
After receiving this control transfer message, because SoC100 starts, thus do not need to carry out initial configuration, so primary processor 110 is only carried out for image sensor interface module 150 and 170 process control of picture signal processing module.When SoC100 startup next time, the initial configuration that primary processor 100 is carried out for image sensor interface module 150 and picture signal processing module 170.
In addition, after coprocessor 180 is transferred control, receive and transfer the control order from primary processor 110, coprocessor 180 rather than primary processor 110 are carried out for image sensor interface module 150 and 170 process control of picture signal processing module.
As mentioned above, according to the SOC with image processing function proposed by the invention, SOC has comprised dedicated coprocessor.When dedicated coprocessor carries out image signal initial configuration, host CPU can walk abreast and carry out other work, has reduced the load of host CPU, has promoted the performance of host CPU.Simultaneously, when dedicated coprocessor was controlled, host CPU can be in idle condition, had fully reduced system power dissipation, had promoted the independence of image-signal processing system.In addition, this SoC also can be configured to primary processor and controls whole built-in image-signal processing system, thereby has greatly promoted the flexibility of software solution.
Although meaned and described some embodiments of the present invention, having it should be appreciated by those skilled in the art that and can modify to these embodiment in the situation that do not break away from principle of the present invention and the spirit that is limited its scope by claim and equivalent thereof.
Claims (10)
1. SOC (system on a chip) with image processing function is characterized in that comprising:
Primary processor, be constructed to control the integrated operation of described SOC (system on a chip);
The image sensor interface module, be constructed to, from the imageing sensor reception view data the carries out image Data Format Transform that are connected to described SOC (system on a chip), the view data of reception is converted to picture signal;
The picture signal processing module, be constructed to receive picture signal the picture signal carries out image processing to receiving through conversion from described image sensor interface module;
Coprocessor, be constructed to the operation of control chart image-position sensor interface module and picture signal processing module.
2. SOC (system on a chip) according to claim 1, wherein, when described starting system on chip, coprocessor is carried out the initial configuration for image sensor interface module and picture signal processing module, and processes and put the operation that configuration information determines that the picture signal processing module will be carried out according to image.
3. SOC (system on a chip) according to claim 2, wherein, when described starting system on chip, coprocessor finds that by imageing sensor operation determines the characteristic of the imageing sensor connected, and according to the characteristic of the imageing sensor of determining and the picture signal form that the picture signal form after the conversion of the view data reception form of configuration image sensor interface module and image sensor interface module and picture signal processing module receive.
4. SOC (system on a chip) according to claim 1, wherein, the image sensor interface module comprises:
High-speed interface, receive the serial high speed image data from described imageing sensor;
String parse module, tell view data to be converted to the parallel image data serial of reception;
Calibration module, be converted to picture signal according to the configuration of coprocessor by the parallel image data.
5. SOC (system on a chip) according to claim 2, wherein, coprocessor is carried out the initial configuration for image sensor interface module and picture signal processing module by configuring corresponding register.
6. the operation method with SOC (system on a chip) of image processing function, is characterized in that comprising the steps:
Association in response to master controller processes starting command, and coprocessor is carried out the initial configuration for image sensor interface module and picture signal processing module;
In response to the image that carrys out autonomous controller, process initiation command, coprocessor control image sensor interface module and the operation of picture signal processing module carries out image processing.
7. operation method according to claim 6 also comprises:
In response to the order of weighing about transferring the image processing controls that carrys out autonomous controller, coprocessor stops the control for the image processing operations of image sensor interface module and picture signal processing module, by the image processing operations of main controller controls for image sensor interface module and picture signal processing module.
8. operation method according to claim 6, wherein, the step of carrying out initial configuration comprises:
Coprocessor finds to operate by imageing sensor the characteristic of determining the imageing sensor connected;
Coprocessor is according to the characteristic of the imageing sensor of determining and the view data of configuration image sensor interface module receives form.
9. operation method according to claim 8, wherein, the step of carrying out initial configuration also comprises:
Coprocessor is according to the characteristic of described imageing sensor and the picture signal form that the picture signal form after the conversion of configuration image sensor interface module and picture signal processing module receive.
10. operation method according to claim 6, wherein, the step of carrying out initial configuration comprises: coprocessor is processed and is put configuration information and determine what the picture signal processing module will be carried out according to image.
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