CN108200473A - Cpu power control method, intelligent TV set and storage medium - Google Patents
Cpu power control method, intelligent TV set and storage medium Download PDFInfo
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- CN108200473A CN108200473A CN201810116265.6A CN201810116265A CN108200473A CN 108200473 A CN108200473 A CN 108200473A CN 201810116265 A CN201810116265 A CN 201810116265A CN 108200473 A CN108200473 A CN 108200473A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/4424—Monitoring of the internal components or processes of the client device, e.g. CPU or memory load, processing speed, timer, counter or percentage of the hard disk space used
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
- H04N21/4436—Power management, e.g. shutting down unused components of the receiver
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- General Engineering & Computer Science (AREA)
- Power Sources (AREA)
Abstract
The present invention proposes a kind of cpu power control method, intelligent TV set and storage medium, and applied to intelligent TV set, which includes：Obtain the system load parameters of current application scene and legacy system load parameter；According to the system load parameters of current application scene, legacy system load parameter and preset rules, the system load parameters of next application scenarios are determined；System load parameters according to the next application scenarios being calculated adjust the frequency and voltage of CPU, to adjust the power of CPU.Technical solution of the present invention can adjust the power of the CPU of smart television in real time, improve the reliability and service life of CPU.
Description
Technical field
The present invention relates to ntelligent television technolog field more particularly to a kind of cpu power control method, intelligent TV set and deposit
Storage media.
Background technology
As the intelligence degree of the equipment such as television set is higher and higher and more and more high quality, two-forty signals
Such as the appearance of HDMI2.0, USB3.0, internet video etc., the various application scenarios such as system operation to be treated and signal
Also it becomes increasingly complex.
In order to allow system that can handle most complex application context, that is, in order to the upper limit for reaching system, it will usually carry
The working frequency of high CPU and supply voltage also lead to the working frequency of CPU and voltage is more than and works as in this way to meet power demand
The demand of preceding application scenarios so that the power of CPU remains high, and the temperature of system is caused to be constantly in higher state, this reduction
The reliability and service life of system.
Invention content
It is a primary object of the present invention to provide a kind of replacing background method of menu interface, it is intended to adjustment intelligence electricity in real time
Depending on CPU power, improve the reliability and service life of CPU.
To achieve the above object, cpu power control method proposed by the present invention, applied to intelligent TV set, the cpu power
Control method includes：
Preferably, the system load parameters, legacy system load parameter and preset rules according to current application scene,
It determines the system load parameters of next application scenarios, specifically includes：
The active signal of current application scene system load parameter is obtained, when acquisition legacy system load parameter presets multiple
Between section idle signal, the active signal and idle signal include CPU idle periods signal, CPU EMS memory occupations ratio is believed
Number and cpu chip temperature signal；
The system load parameters of next application scenarios are calculated according to active signal, idle signal and preset rules.
Preferably, the system load parameters that application scenarios are calculated according to active signal, idle signal and preset rules
It specifically includes：
Processing is weighted to active signal, calculates the average value of the idle signal；
Active signal after weighting and the idle signal after mean value calculation are overlapped；
The system load parameters of next application scenarios are calculated by rolling average algorithm according to the signal after superposition.
Preferably, the average value that processing is weighted to active signal, calculates the idle signal, specifically includes：
Active signal is converted into corresponding binary digital signal, preset power is assigned to each binary digital signal
Weight coefficient；
The idle signal of each period is converted into corresponding binary digital signal, binary digital signal is put down
Mean value computation.
Preferably, the active signal after described pair of weighting and the idle signal after mean value calculation are overlapped, specific to wrap
It includes：
By active signal assign preset weight coefficient binary digital signal and mean value calculation after binary number
Word signal is overlapped, and obtains superposed signal all the way.
Preferably, the signal according to after superposition is born by the system that rolling average algorithm calculates next application scenarios
It carries, specifically includes：
The system that the signal according to after superposition calculates next application scenarios by exponential smoothing rolling average algorithm
Load.
Preferably, the system load for next application scenarios that the foundation is calculated adjusts the frequency and voltage of CPU
It specifically includes：
Judge whether the system load of next application scenarios is more than the load of current application scene；
If the system load of application scenarios is more than the load of current application scene, the operating voltage of CPU is improved, improves CPU
Working frequency；If the system load of application scenarios is less than the load of current application scene, the working frequency of CPU is reduced, is reduced
The operating voltage of CPU；If the system load of application scenarios is equal to the load of current application scene, the working frequency and work of CPU
Make voltage not make adjustments.
Preferably, the intelligent TV set includes power management chip and operating voltage adjustment circuit, passes through operating voltage
Adjustment circuit sends out pressure regulation instruction, controls the power management chip adjustment output to the operating voltage of CPU.
The present invention also proposes a kind of intelligent TV set, which includes memory, processor and be stored in described
The cpu power control program that memory can simultaneously be run on the processor, the cpu power control program by the processor
The step of cpu power control method as described above is realized during execution.
The present invention also proposes a kind of storage medium, which is stored with cpu power control program, the cpu power
The step of control program realizes cpu power control method as described above when being executed by processor.
The cpu power control method of the embodiment of the present invention, using smart television, when intelligent TV set works normally, CPU
The system load parameters of current application scene and legacy system load parameter are obtained, wherein, application scenarios can be television set
The state under the different patterns, such as film broadcasting, music, game etc..In the embodiment of the present invention, answered according to current
With the system load parameters and preset rules of scene, the system load parameters of next application scenarios are obtained.It is arrived further according to calculating
System load parameters adjust CPU frequency and voltage.Technical solution of the present invention can adjust intelligence in real time according to application scenarios
The power of the CPU of TV avoids the waste of the power of CPU, improves the reliability and service life of CPU.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Structure according to these attached drawings obtains other attached drawings.
Fig. 1 is the hardware architecture diagram of one embodiment of smart television of the present invention；
Fig. 2 is the first pass figure of one embodiment of cpu power control method of the present invention；
Fig. 3 is the particular flow sheet of step S200 in Fig. 2；
Fig. 4 is the particular flow sheet of step S220 in Fig. 3；
Fig. 5 is the functional block diagram of CPU operating voltage adjustment circuit first embodiments；
Fig. 6 is the functional block diagram of CPU operating voltage adjustment circuit second embodiments；
Fig. 7 is the functional block diagram of CPU operating voltage adjustment circuit 3rd embodiments.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The present invention proposes a kind of intelligent TV set.
As shown in Figure 1, Fig. 1 is the hardware architecture diagram of one embodiment of smart television of the present invention.
As shown in Figure 1, smart television 100 can include：Processor 1001, such as CPU, network interface 1004, Yong Hujie
Mouth 1003, memory 1005, communication bus 1002.Wherein, the connection that communication bus 1002 is used to implement between these components is led to
Letter.User interface 1003 can include display unit (Display), input unit such as interactive interface, in the present invention intelligence
TV 100 can interact during running software with user terminal, and parameter setting or debugging are being carried out to smart television 100
When, tester or designer can be using the inputs of the progress data information of user interface 1003, and optional user interface 1003 is also
It can include standard wireline interface and wireless interface.Network interface 1004 can optionally include the wireline interface, wireless of standard
Interface (such as WI-FI interfaces).Memory 1005 can be high-speed RAM memory or the memory (non-of stabilization
Volatile memory), such as magnetic disk storage.Memory 1005 optionally can also be independently of aforementioned processor 1001
Storage device.
Optionally, smart television 100 can also include camera, RF (Radio Frequency, radio frequency) circuit, sensing
Device, voicefrequency circuit, WiFi module etc..Wherein, sensor such as optical sensor, motion sensor, air quality sensor with
And other sensors.Specifically, optical sensor may include ambient light sensor and proximity sensor, wherein, ambient light sensor
The brightness of display unit can be adjusted according to the light and shade of ambient light, proximity sensor can come into smart television detecting people
When 100, display unit and/or backlight are opened.As one kind of motion sensor, gravity accelerometer can detect each side
The size of (generally three axis) acceleration upwards, can detect that size and the direction of gravity when static, can be used to identify mobile whole
Hold application (such as magnetometer pose calibrating), Vibration identification correlation function (for example percussion) of posture etc.；As environment measuring member
Part, air quality sensor can be temperature sensor, humidity sensor, carbon dioxide sensor and PM2.5 sensors；When
So, the smart television 100 can also configure gyroscope, barometer, hygrometer, thermometer, infrared ray sensor etc. other sensing
Device, details are not described herein.
It will be understood by those skilled in the art that the hardware configuration shown in Fig. 1 does not form the limit to smart television 100
It is fixed, it can include either combining certain components or different components arrangement than illustrating more or fewer components.
When intelligent TV set works normally, the system load of current application scene is obtained.With the hair of intelligent TV set
Exhibition and more and more high quality, two-forty signal signals of formation such as HDMI2.0, USB3.0, internet video
Occur so that the application scenarios of processing is more and more needed for intelligent TV set.
The cpu power control method is by obtaining the system load parameters of current application scene and legacy system load ginseng
Number, the system load of later scene is calculated according to preset rules, and the frequency and electricity of CPU are adjusted according to obtained system load
Pressure so that the power of CPU and the required power of current application scenarios match, and the waste of power are avoided, so as to improve
The heat dissipation performance of CPU conducive to system temperature is reduced, improves the reliability and service life of system.
As shown in Figure 1, it can lead to as in a kind of memory 1005 of computer storage media including operating system, network
Believe module and cpu power control program.
In smart television 100 shown in Fig. 1, network interface 1004 is mainly used for connecting background server or big data cloud
End, with background server or big data high in the clouds into row data communication；User interface 1003 is mainly used for connecting client (user
End), with client into row data communication；Following methods step is realized during cpu power control program operation：
Obtain the system load parameters of current application scene and legacy system load parameter.
According to the system load parameters of current application scene, legacy system load parameter and preset rules, determine next
The system load parameters of application scenarios.
System load parameters according to the next application scenarios being calculated adjust the frequency and voltage of CPU, to adjust
The power of CPU.
Further, it is described according to the system load parameters of current application scene, legacy system load parameter and default rule
Then, the system load parameters of next application scenarios are determined, are specifically included：
The active signal of current application scene system load parameter is obtained, when acquisition legacy system load parameter presets multiple
Between section idle signal, the active signal and idle signal include CPU idle periods signal, CPU EMS memory occupations ratio is believed
Number and cpu chip temperature signal.
The system load parameters of next application scenarios are calculated according to active signal, idle signal and preset rules.
Further, the system load ginseng that application scenarios are calculated according to active signal, idle signal and preset rules
Number specifically includes：
Processing is weighted to active signal, calculates the average value of the idle signal.
Active signal after weighting and the idle signal after mean value calculation are overlapped.
The system load parameters of next application scenarios are calculated by rolling average algorithm according to the signal after superposition.
Further, the average value that processing is weighted to active signal, calculates the idle signal, it is specific to wrap
It includes：
Active signal is converted into corresponding binary digital signal, preset power is assigned to each binary digital signal
Weight coefficient.
The idle signal of each period is converted into corresponding binary digital signal, binary digital signal is put down
Mean value computation.
Further, the active signal after described pair of weighting and the idle signal after mean value calculation are overlapped, specifically
Including：
By active signal assign preset weight coefficient binary digital signal and mean value calculation after binary number
Word signal is overlapped, and obtains superposed signal all the way.
Further, the system that the signal according to after superposition calculates next application scenarios by rolling average algorithm
Load, specifically includes：
The system that the signal according to after superposition calculates next application scenarios by exponential smoothing rolling average algorithm
Load.
Further, the system load for next application scenarios that the foundation is calculated adjusts the frequency and electricity of CPU
Pressure specifically includes：
According to the operating voltage and working frequency needed for the system load acquiring size CPU of next application scenarios.
Judge whether the system load of next application scenarios is more than the load of current application scene.
If the system load of application scenarios is more than the load of current application scene, the operating voltage of CPU is improved, improves CPU
Working frequency；If the system load of application scenarios is less than the load of current application scene, the working frequency of CPU is reduced, is reduced
The operating voltage of CPU；If the system load of application scenarios is equal to the load of current application scene, the working frequency and work of CPU
Make voltage not make adjustments.
Further, the intelligent TV set includes power management chip and operating voltage adjustment circuit, passes through the electricity that works
Pressure adjustment circuit sends out pressure regulation instruction, controls the power management chip adjustment output to the operating voltage of CPU.
Reference Fig. 2, present invention further propose that a kind of cpu power control method, applied to smart television or other intelligence
Terminal.
The cpu power control method includes：
S100, the system load parameters of current application scene and legacy system load parameter are obtained.
S200, system load parameters, legacy system load parameter and preset rules according to current application scene, under determining
The system load parameters of one application scenarios.
S300, the system load parameters according to the next application scenarios being calculated adjust the frequency and voltage of CPU, with
Adjust the power of CPU.
It should be noted that when next application scenarios are the scene modes that current application scene will enter.For example,
High code stream vision signal of the vision signal from USB3.0 that current application scene is obtained for intelligent TV set, next applied field
When intelligent TV set obtains low-bit video signal of the vision signal from internet in scape, since CPU is in processing low code stream
Power needed for vision signal is less than the power of the vision signal of processing high code stream.Next answer is calculated further according to preset rules
With the system load of scene, the frequency and voltage of CPU are turned down according to system load parameters, so as to reduce the power of CPU.Conversely,
When the system load of next application scenarios is more than the system load of current application scene, then height-adjusting system loads.
It should be noted that in the present embodiment, application scenarios are corresponding to the audio-video signal of CPU processing different code streams
Working condition.
In the concrete realization, the system load parameters are the relevant parameters for referring to characterization cpu power size, such as
It CPU EMS memory occupations ratio, the temperature of CPU, CPU idle periods etc., does not enumerate herein.Actually carrying out the pre- of system load
In survey, wherein several system load parameters are chosen, the system load parameters of next application scenarios are determined according to preset rules.
Technical solution of the present invention can adjust the power of the CPU of smart television in real time according to application scenarios, avoid the work(of CPU
The waste of rate improves the reliability and service life of CPU.
With reference to Fig. 3 specifically, the load for obtaining current application scene specifically includes：
S210, the active signal for obtaining current application scene system load parameter obtain legacy system load parameter and preset
The idle signal of multiple periods, the active signal and idle signal include CPU idle periods signal, CPU EMS memory occupations
Scaling signal and cpu chip temperature signal.
S220, the system load parameters that next application scenarios are calculated according to active signal, idle signal and preset rules.
What deserves to be explained is the system load parameters of current application scene include CPU idle periods signal, CPU memories account for
With scaling signal and cpu chip temperature signal；Legacy system load parameter also includes CPU idle periods signal, CPU memories account for
With scaling signal and cpu chip temperature signal.
CPU idle period signals referred in mono- work period of CPU, in the time waited in CPU treatment progress.
CPU idle periods signal, CPU EMS memory occupations scaling signal and cpu chip temperature signal these three system load parameters most can tables
Levy the parameter of CPU operating powers.Therefore, the load parameter of next application scenarios is determined by these three parameters.
In the present embodiment, CPU idle periods signal, CPU EMS memory occupations scaling signal and cpu chip temperature signal, this three
A signal is easily obtained, and can fully characterize the power of CPU, and next scene is determined by less signal and advance rule
Load parameter, reduce the calculation amount of CPU, so as to reduce the power consumption of CPU.
With reference to Fig. 4, specifically, the system that application scenarios are calculated according to active signal, idle signal and preset rules
Load parameter specifically includes：
S221, processing is weighted to active signal, calculates the average value of the idle signal.
S222, the active signal after weighting and the idle signal after mean value calculation are overlapped.
S223, the system load ginseng for calculating next application scenarios by rolling average algorithm according to the signal after superposition
Number.
It should be noted that include the pre- averager of active signal weighter, idle signal, load superimposer in the CPU
And index rolling average device.Specific practice is that the active signal of current scene is sent into active signal weighter, and legacy system is born
The idle signal of load is sent into the pre- averager of idle signal, is weighted carrying out letter with load superimposer of being sent into rear after mean value calculation
Number superposition, the result of superimposer output are sent to index rolling average device, perform index rolling average algorithm, and it is pre- to carry out performance
It surveys.The result that index rolling average device obtains is compared in a comparator with pre-set threshold value, if the property of prediction
It higher than the upper limit can then ask that frequency is turned up；, whereas if the performance requirement of prediction then asks to reduce frequency less than lower limit.
It is sampled to obtain corresponding active signal, active signal packet by the system load parameters to current application scene
Include CPU idle periods signal, CPU EMS memory occupations scaling signal and cpu chip temperature signal.By these signals conversion bit digital letter
Number, certain weight coefficient is assigned to CPU idle periods signal, CPU EMS memory occupations scaling signal and cpu chip temperature signal.
CPU operating powers are characterized according to CPU idle periods signal, CPU EMS memory occupations scaling signal and cpu chip temperature signal different
Degree assigns different size of weight coefficient.In the present embodiment, CPU idle periods signal, CPU EMS memory occupations ratio letter are assigned
Number and the weight coefficient of cpu chip temperature signal be followed successively by 0.4,0.4 and 0.2.
It is corresponding by being sampled to obtain to legacy system (application scenarios before current application scene) load parameter
Idle signal, idle signal include CPU idle periods signal, CPU EMS memory occupations scaling signal and cpu chip temperature signal.It will
These signals are converted to digital signal, to these signal averageds.
Specifically, the average value that processing is weighted to active signal, calculates the idle signal, specifically includes：
Active signal is converted into corresponding binary digital signal, preset power is assigned to each binary digital signal
Weight coefficient；
The idle signal of each period is converted into corresponding binary digital signal, binary digital signal is put down
Mean value computation.
What deserves to be explained is idle signal of the active signal of current application scene than historical usage scene, to next
The predicted impact bigger of application scenarios.The weight coefficient assigned by binary digital signal corresponding to active signal so that
The corresponding binary digital signal of the active signal that is affected to cpu power obtains larger weight coefficient, and to idle signal
Mean value calculation is carried out, so so that prediction result is more accurate.
Specifically, the active signal after described pair of weighting and the idle signal after mean value calculation are overlapped, specific to wrap
It includes：
By active signal assign preset weight coefficient binary digital signal and mean value calculation after binary number
Word signal is overlapped, and obtains superposed signal all the way.
It can be readily appreciated that it is that corresponding amplitude is added to signal to the superposition of signal.
Assuming that it after CPU idle periods signal, CPU EMS memory occupations scaling signal and the conversion of cpu chip temperature signal and assigns
The corresponding digital signal of weight coefficient is respectively a, b, c；The binary digital signal after mean value calculation is carried out as d, by a,
B, c and d are overlapped, and obtain superposed signal e all the way.In this way, it obtains calculating required signal in next step.
It should be noted that by the way that multiple signals are superimposed to signal all the way, by this, signal acts on behalf of preset formula all the way
In, carry out the prediction of the system load of next application scenarios.
Specifically, the signal according to after superposition is born by the system that rolling average algorithm calculates next application scenarios
It carries, specifically includes：
The system that the signal according to after superposition calculates next application scenarios by exponential smoothing rolling average algorithm
Load.In the present embodiment, the system load of later scene is carried out using exponential smoothing rolling average algorithm (i.e. EMA algorithms) pre-
It surveys.By EMA algorithms, the system load of next application scenarios is accurately predicted.
Specifically, the frequency and voltage of CPU are adjusted according to the system load parameters for the next application scenarios being calculated,
To adjust the power of CPU, specifically include：
Judge whether the system load of next application scenarios is more than the load of current application scene.
If the system load of application scenarios is more than the load of current application scene, the operating voltage of CPU is improved, improves CPU
Working frequency；If the system load of application scenarios is less than the load of current application scene, the working frequency of CPU is reduced, is reduced
The operating voltage of CPU；If the system load of application scenarios is equal to the load of current application scene, the working frequency and work of CPU
Make voltage not make adjustments.
It should be noted that before being adjusted CPU voltages and frequency, need to judge the system of next application scenarios
The size of load and the system load of current application scene, to determine being to turn down CPU voltages and frequency either height-regulating CPU voltages
And frequency.Specifically the result that index rolling average device obtains and pre-set threshold value are compared in a comparator,
If the performance (i.e. system load) of prediction higher than the upper limit asks that frequency is turned up；, whereas if the performance requirement of prediction is less than
Lower limit then asks to reduce frequency.In this way, realizing the real-time adjustment to CPU operating voltages and working frequency, ensure the work(of CPU
Rate in a more matched range, avoids the waste of cpu power, so as to reduce the calorific value of CPU always.
When CPU carries out operating voltage adjustment, the operating voltage adjustment circuit of CPU includes following three embodiments：
With reference to Fig. 5, in one embodiment, specifically, the intelligent TV set includes power management chip 300 and I2C is controlled
Circuit (not indicating) processed, the CPU 200 send out pressure regulation by I2C control circuits and instruct, and control the power management chip tune
It is whole to export to the operating voltage of CPU 200.
It should be noted that CPU 200 is directly connect by I2C control circuits with power management chip, wherein I2C controls
Circuit includes the universal serial bus that data line SCL and clock line SDL is formed.Pmon signal wires and Thermal signals are further included, we
Case can also realize power detection and power supply overheat detecting automatically simultaneously, by power management chip by corresponding PMON and
Thermal signals are given to CPU, and CPU combines the information that both signals provide and power management chip is controlled.
Wherein, pmon signals are the codes that CPU 200 is performed after the power is turned on, and the BIOS being equivalent in x86PC machines has concurrently
The function of bootloader.In the present embodiment, a kind of operating voltage is realized by a kind of relatively simple hardware circuit and is adjusted
Circuit so that hardware cost is relatively low.
With reference to Fig. 6, in one embodiment, specifically, the intelligent TV set includes power management chip and PWM control electricity
Road 400, the CPU 200 send out pressure regulation by pwm control circuit 400 and instruct to the power management chip, control the electricity
The adjustment of source control chip 300 is exported to the operating voltage of CPU 200.
It should be noted that with reference to shown in Fig. 7, power supply control chip includes FB pins and Vout pins, pwm control circuit
400 include resistance R1, R2, R3, R4 and capacitance C1.
Pwm signal, which is equivalent to, compensates feedback signal, and the pwm signal of different duty can be defeated after low-pass filter
Go out the DC level of different voltages, the filtered process of pwm signal, which is equivalent to, realizes D/A conversions.CPU 200 is by sending out
PWM wave the FB feet of power management chip are added to after integrating circuit, intelligence is reached by the duty ratio of adjustment PWM wave
The effect of the supply voltage Vout of CPU200 can be adjusted.
Formula can be obtained according to kirchhoff electric current rule：
According to formula (1) and formula VPWM=D*VIN(D refers to the duty ratio of PWM, V hereINRefer to the pull-up of PWM
Level) it can calculate：
The supply voltage V of CPU can be obtained according to formula (2)OUTIt with duty ratio inversely, will when needing boosting
The duty ratio of PWM reduces, and when needing decompression, the duty ratio of PWM is improved.
In the present embodiment, by setting pwm control circuit, voltage control, technology are carried out by the way of pulsewidth modulation
Scheme is relatively easy to realize, technology maturation is stablized.
With reference to Fig. 7, in one embodiment, specifically, the intelligent TV set includes power management chip 300 and GPIO is controlled
Circuit 500 processed, the CPU send out pressure regulation by GPIO control circuits 500 and instruct to power management chip 300, control the electricity
The adjustment of source control chip 300 is exported to the operating voltage of CPU.
The power management chip 300 includes FB pins and Vout pins, and GPIO control circuits 500 include multiple resistance
R1, R2, R3......RN and corresponding multiple switch Q1, Q2, Q3......QN.
Signal GPIO1, GPIO2.....GPION is correspondingly formed by switching Q1, Q2, Q3......QN, CPU passes through
GPIO1, GPIO2.....GPION send out low and high level to control the switches such as Q1, Q2....QN, and then control R3, R4.....RN
Wait the access of resistance, the resistance value after influence is in parallel with R2, the final value for influencing Vout.
According to formula：
By by resistance value after the sum of resistance value of R1 to RN divided by R2 to RN resistance value parallel connections, multiplied by with reference voltage VREF,It can be with
It calculates, according to the resistance of the different resistance values of access, the value of different Vout can be obtained.
In the present embodiment, by setting GPIO control circuits so that just can be real using a kind of relatively simple control method
The adjusting of existing cpu power voltage reduces the operand of CPU.
The various usage scenarios for equipment such as television sets of the invention are detected and predict resulting
System load, and the working frequency and operating voltage of needs are calculated, then carry out intelligentized adjustment so that the eternal work of system
Make, in optimum performance state, to substantially increase the stability and reliability of system.
In addition, the embodiment of the present invention also proposes a kind of storage medium, which is stored with cpu power control program,
The step of cpu power control program realizes cpu power control method as described above when being executed by processor.
Wherein, cpu power control program is performed realized method and can refer to cpu power control method of the present invention
Each embodiment, details are not described herein again.
It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to non-row
His property includes, so that process, method, article or system including a series of elements not only include those elements, and
And it further includes other elements that are not explicitly listed or further includes intrinsic for this process, method, article or system institute
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including this
Also there are other identical elements in the process of element, method, article or system.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on such understanding, technical scheme of the present invention substantially in other words does the prior art
Going out the part of contribution can be embodied in the form of software product, which is stored in one as described above
In storage medium (such as ROM/RAM, magnetic disc, CD), including some instructions use so that a station terminal equipment (can be mobile phone,
Computer, server, smart television or network equipment etc.) perform method described in each embodiment of the present invention.
It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow shift that bright specification and accompanying drawing content are made directly or indirectly is used in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of cpu power control method, applied to intelligent TV set, which is characterized in that the cpu power control method includes：
Obtain the system load parameters of current application scene and legacy system load parameter；
According to the system load parameters of current application scene, legacy system load parameter and preset rules, next application is determined
The system load parameters of scene；
System load parameters according to the next application scenarios being calculated adjust the frequency and voltage of CPU, to adjust CPU's
Power.
2. cpu power control method according to claim 1, which is characterized in that described to be according to current application scene
System load parameter, legacy system load parameter and preset rules determine the system load parameters of next application scenarios, specific to wrap
It includes：
The active signal of current application scene system load parameter is obtained, legacy system load parameter is obtained and presets multiple periods
Idle signal, the active signal and idle signal include CPU idle periods signal, CPU EMS memory occupations scaling signal and
Cpu chip temperature signal；
The system load parameters of next application scenarios are calculated according to active signal, idle signal and preset rules.
3. cpu power control method according to claim 2, which is characterized in that described according to active signal, idle signal
And the system load parameters of preset rules calculating application scenarios specifically include：
Processing is weighted to active signal, calculates the average value of the idle signal；
Active signal after weighting and the idle signal after mean value calculation are overlapped；
The system load parameters of next application scenarios are calculated by rolling average algorithm according to the signal after superposition.
4. cpu power control method according to claim 3, which is characterized in that described that place is weighted to active signal
Reason, calculates the average value of the idle signal, specifically includes：
Active signal is converted into corresponding binary digital signal, preset weight system is assigned to each binary digital signal
Number；
The idle signal of each period is converted into corresponding binary digital signal, to the average value of binary digital signal
It calculates.
5. cpu power control method according to claim 4, which is characterized in that described pair weighting after active signal and
Idle signal after mean value calculation is overlapped, and is specifically included：
By active signal assign preset weight coefficient binary digital signal and mean value calculation after binary digit believe
It number is overlapped, obtains superposed signal all the way.
6. cpu power control method according to claim 3, which is characterized in that the signal according to after superposition passes through
Rolling average algorithm calculates the system load of next application scenarios, specifically includes：
The signal according to after superposition calculates the system load of next application scenarios by exponential smoothing rolling average algorithm.
7. cpu power control method as claimed in any of claims 1 to 6, which is characterized in that described according to calculating
The system load of obtained next application scenarios adjusts the frequency of CPU and voltage specifically includes：
Judge whether the system load of next application scenarios is more than the load of current application scene；
If the system load of application scenarios is more than the load of current application scene, the operating voltage of CPU is improved, and improve CPU's
Working frequency；If the system load of application scenarios is less than the load of current application scene, the working frequency of CPU is reduced, and reduce
The operating voltage of CPU；If the system load of application scenarios is equal to the load of current application scene, the working frequency and work of CPU
Make voltage not make adjustments.
8. cpu power control method as claimed in any of claims 1 to 6, the intelligent TV set includes power supply
Managing chip and operating voltage adjustment circuit, which is characterized in that
Pressure regulation is sent out by operating voltage adjustment circuit to instruct, and controls work of the power management chip adjustment output to CPU
Voltage.
9. a kind of intelligent TV set, which is characterized in that the intelligent TV set includes memory, processor and is stored in the storage
The cpu power control program that device can simultaneously be run on the processor, the cpu power control program are performed by the processor
The step of Shi Shixian such as claim 1 to 8 any one of them cpu power control methods.
10. a kind of storage medium, which is characterized in that the storage medium is stored with cpu power control program, the cpu power control
It is realized when processing procedure sequence is executed by processor such as the step of claim 1 to 8 any one of them cpu power control method.
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