CN106686451A - Terminal and video playing control method - Google Patents
Terminal and video playing control method Download PDFInfo
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- CN106686451A CN106686451A CN201611232217.0A CN201611232217A CN106686451A CN 106686451 A CN106686451 A CN 106686451A CN 201611232217 A CN201611232217 A CN 201611232217A CN 106686451 A CN106686451 A CN 106686451A
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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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/44008—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream
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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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440281—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by altering the temporal resolution, e.g. by frame skipping
Abstract
The invention discloses a terminal and a video playing control method. The terminal comprises an extraction module, a detection module and a control module. The extraction module is used for extracting video frames of played video at the beginning of the preset initial time according to sequence of play time and preset extraction cycle. The detection module is used for detecting image diversity factor of every two adjacent video frames extracted by the extraction module. The control module is used for adjusting play frame rate of the video at the detection node according to the image diversity factor; the detection node refers to the corresponding time node of the video frame, played later, of the two video frames. By the video playing control method, on the premise of guaranteeing video play smoothness, the play frame rate is adjusted dynamically during video playing, processor resource occupied during video playing can be reduced effectively, burden of the processor can be reduced effectively, power consumption of the terminal can be decreased, and service life of the battery of the terminal is prolonged; meanwhile, in the process of dynamic adjusting of the play fame rate, video playing visual effect can be improved, and users' experiences are improved further.
Description
Technical field
The present invention relates to field terminal applies technical field, more particularly to a kind of terminal and video playing control method.
Background technology
Current either mobile terminal or other video playback apparatus, when video is played, once have selected video
Definition (SD, high definition, blue light) is played, that is, determines video playback frame per second, then the play frame rate in whole playing process
Just will not change, except non-artificial Switch Video play mode.
However, in any video, to the human eye, the video for being not each section is all to need very high broadcasting
Frame per second is put, if being all the higher play frame rate of unalterable employing in whole video display process, processor is not only caused
Unnecessary long-term burden, while can also increase corresponding power consumption.
The content of the invention
Present invention is primarily targeted at proposing a kind of terminal and video playing control method, it is intended to solve existing video and broadcast
Play frame rate cannot the dynamic problem for adjusting during putting.
For achieving the above object, a kind of terminal that the present invention is provided, including：
Extraction module, for according to the extracting cycle of reproduction time order and setting, starting to carry from default initial time
Take the frame of video for playing video；
Detection module, for for the two adjacent frame frame of video extracted, detecting the image difference of the two frames frame of video
Degree；
Control module, for according to described image diversity factor, in detection node, adjusting the play frame rate of the video；Institute
Detection node is stated for the corresponding timing node of the posterior frame of video of reproduction time in the two frames frame of video.
Alternatively, the extracting cycle is time cycle or frame number cycle.
Alternatively, the control module, if reach default first adjustment threshold value specifically for described image diversity factor,
The detection node, according to default adjustable strategies, improves the play frame rate of the video；If described image diversity factor is less than pre-
If during the second adjustment threshold value, in the detection node, according to default adjustable strategies, reducing the play frame rate of the video；Institute
The first adjustment threshold value is stated more than the described second adjustment threshold value；Or,
Specifically for the corresponding relation according to default image difference degree scope and play frame rate scope, in the detection section
Point, by the corresponding currently playing frame per second of the video play frame rate scope corresponding with the image difference degree for detecting is adjusted to
It is interior.
Alternatively, the detection module, specifically for according to selected pixel-parameters, the two frames frame of video being determined respectively
The variance of corresponding pixel-parameters, using the absolute difference of two variances for determining as described image diversity factor；Or,
Specifically for the two frames frame of video carrying out face-image identification respectively, during the two frames frame of video is determined respectively
The quantity of face-image, using the absolute difference of two quantity for determining as described image diversity factor；Or,
Specifically for the dividing number by setting, respectively the two frames frame of video is divided into into multiple two field pictures, is compared successively
To the two field picture at same position in the two frames frame of video；According to comparison result, the unmatched number of times of record two field picture, by institute
The ratio that number of times is stated with the dividing number is used as described image diversity factor；Or,
Specifically for carrying out face-image identification to first frame of video, have in first frame of video is identified
During at least one face-image, for arbitrary face-image, first position letter of the image in first frame of video is recorded
Breath, and extract the characteristics of image of the face-image；The face figure is searched in second frame of video according to described image feature
Picture, if finding, records second position information of the face-image in second frame of video；If not finding, will be described
Second position information is set to 0；Using the second position information and the absolute difference of the first position information as described
Image difference degree；The two frames frame of video is the first frame of video and the second frame of video.
Specifically, the selected pixel-parameters of the basis, determine respectively the corresponding pixel-parameters of the two frames frame of video
Variance, using the absolute difference of two variances for determining as described image diversity factor, including：
For arbitrary frame of video, according to the rgb value of each pixel of the frame of video, it is determined that the corresponding picture of described each pixel
Plain parameter value；
According to each pixel-parameters value, the meansigma methodss of the pixel-parameters value of the frame of video all pixels are determined；
According to described each pixel-parameters value and the meansigma methodss, it is determined that the corresponding pixel-parameters side of described each pixel
Difference；
According to each variance, the variance of the corresponding pixel-parameters of the frame of video is determined.
Additionally, for achieving the above object, the present invention also proposes a kind of video playing control method, including step：
According to reproduction time order and the extracting cycle of setting, start to extract from default initial time and play regarding for video
Frequency frame；
For the two adjacent frame frame of video extracted, the image difference degree of the two frames frame of video is detected；
According to described image diversity factor, in detection node, the play frame rate of the video is adjusted；The detection node is institute
State the corresponding timing node of the posterior frame of video of reproduction time in two frame frame of video.
Alternatively, the extracting cycle is time cycle or frame number cycle.
Alternatively, it is described that the play frame rate of the video, in detection node, is adjusted according to described image diversity factor, including：
If described image diversity factor reaches default first adjustment threshold value, in the detection node, according to default adjustment
Strategy, improves the play frame rate of the video；If described image diversity factor is less than default second adjustment threshold value, in the detection
Node, according to default adjustable strategies, reduces the play frame rate of the video；The first adjustment threshold value is adjusted more than described second
Whole threshold value；Or,
According to default image difference degree scope and the corresponding relation of play frame rate, in the detection node, regard described
Frequently corresponding currently playing frame per second is adjusted in the range of play frame rate corresponding with the image difference degree for detecting.
Alternatively, the two frames frame of video is the first frame of video and the second frame of video；It is described to detect the two frames frame of video
Image difference degree, including：
According to selected pixel-parameters, the variance of the corresponding pixel-parameters of the two frames frame of video is determined respectively, will determine
Two variances absolute difference as described image diversity factor；Or,
Respectively face-image identification is carried out to the two frames frame of video, the two frames frame of video septum reset image is determined respectively
Quantity, using determine two quantity absolute difference as described image diversity factor；Or,
By the dividing number of setting, respectively the two frames frame of video is divided into into multiple two field pictures, described two are compared successively
Two field picture in frame frame of video at same position；According to comparison result, the unmatched number of times of record two field picture, by the number of times with
The ratio of the dividing number is used as described image diversity factor；Or,
Face-image identification is carried out to first frame of video, has at least one in first frame of video is identified
During face-image, for arbitrary face-image, first position information of the image in first frame of video is recorded, and extracted
The characteristics of image of the face-image；The face-image is searched in second frame of video according to described image feature, if searching
Arrive, record second position information of the face-image in second frame of video；If not finding, by the second confidence
Breath is set to 0；Using the absolute difference of the second position information and the first position information as described image diversity factor.
Specifically, the selected pixel-parameters of the basis, determine respectively the corresponding pixel-parameters of the two frames frame of video
Variance, including：
For arbitrary frame of video, according to the rgb value of each pixel of the frame of video, it is determined that the corresponding picture of described each pixel
Plain parameter value；
According to each pixel-parameters value, the meansigma methodss of the pixel-parameters value of the frame of video all pixels are determined；
According to described each pixel-parameters value and the meansigma methodss, it is determined that the corresponding pixel-parameters side of described each pixel
Difference；
According to each variance, the variance of the corresponding pixel-parameters of the frame of video is determined.
Terminal proposed by the present invention and video playing control method, realize playing the dynamic of the play frame rate during video
Adjustment, on the premise of video playback smooth degree is ensured, can effectively mitigate and play the processor resource taken during video, effectively
The burden of processor is reduced, the power consumption of terminal is effectively reduced, the use time of end cell is improve, meanwhile, in play frame rate
Dynamic adjustment process in, it is also possible to improve the visual effect of video playback, further improve Consumer's Experience.
Description of the drawings
Fig. 1 is the hardware architecture diagram for realizing each optional mobile terminal of embodiment one of the invention；
Fig. 2 is the wireless communication system schematic diagram of mobile terminal as shown in Figure 1；
Fig. 3 is a kind of structural representation of terminal in the embodiment of the present invention；
Fig. 4 is a kind of flow chart of video playing control method in the embodiment of the present invention.
The realization of the object of the invention, functional characteristics and advantage will be described further referring to the drawings in conjunction with the embodiments.
Specific embodiment
It should be appreciated that specific embodiment described herein is not intended to limit the present invention only to explain the present invention.
The mobile terminal of each embodiment of the invention is realized referring now to Description of Drawings.In follow-up description, use
For represent element such as " module ", " part " or " unit " suffix only for be conducive to the present invention explanation, itself
Not specific meaning.Therefore, " module " can be used mixedly with " part ".
Mobile terminal can be implemented in a variety of manners.For example, the terminal described in the present invention can include such as moving
Phone, smart phone, notebook computer, digit broadcasting receiver, PDA (personal digital assistant), PAD (panel computer), PMP
The mobile terminal of (portable media player), guider etc. and such as numeral TV, desk computer etc. are consolidated
Determine terminal.Hereinafter it is assumed that terminal is mobile terminal.However, it will be understood by those skilled in the art that, except being used in particular for movement
Outside the element of purpose, construction according to the embodiment of the present invention can also apply to the terminal of fixed type.
Fig. 1 is that the hardware configuration for realizing each optional mobile terminal of embodiment one of the invention is illustrated.
Mobile terminal 1 00 can include wireless communication unit 110, A/V (audio/video) input block 120, user input
Unit 130, sensing unit 140, output unit 150, memorizer 160, interface unit 170, controller 180 and power subsystem 190
Etc..Fig. 1 shows the mobile terminal with various assemblies, it should be understood that being not required for implementing all groups for illustrating
Part.More or less of component can alternatively be implemented.Will be discussed in more detail below the element of mobile terminal.
Wireless communication unit 110 generally includes one or more assemblies, and it allows mobile terminal 1 00 and wireless communication system
Or the radio communication between network.For example, wireless communication unit can include broadcasting reception module 111, mobile communication module
112nd, at least one of wireless Internet module 113, short range communication module 114 and location information module 115.
Broadcasting reception module 111 receives broadcast singal and/or broadcast via broadcast channel from external broadcast management server
Relevant information.Broadcast channel can include satellite channel and/or terrestrial channel.Broadcast management server can be generated and sent
The broadcast singal generated before the server or reception of broadcast singal and/or broadcast related information and/or broadcast related information
And send it to the server of terminal.Broadcast singal can include TV broadcast singals, radio signals, data broadcasting
Signal etc..And, broadcast singal may further include the broadcast singal combined with TV or radio signals.Broadcast phase
Pass information can also be provided via mobile communications network, and in this case, broadcast related information can be by mobile communication mould
Block 112 is receiving.Broadcast singal can be present in a variety of manners, and for example, it can be with the electronics of DMB (DMB)
The form of program guide (EPG), the electronic service guidebooks (ESG) of digital video broadcast-handheld (DVB-H) etc. and exist.Broadcast
Receiver module 111 can receive signal broadcast by using various types of broadcast systems.Especially, broadcasting reception module 111
Can be wide by using such as multimedia broadcasting-ground (DMB-T), DMB-satellite (DMB-S), digital video
Broadcast-hand-held (DVB-H), forward link media (MediaFLO@) Radio Data System, received terrestrial digital broadcasting integrated service
Etc. (ISDB-T) digit broadcasting system receives digital broadcasting.Broadcasting reception module 111 may be constructed such that and be adapted to provide for extensively
Broadcast the various broadcast systems and above-mentioned digit broadcasting system of signal.Via broadcasting reception module 111 receive broadcast singal and/
Or broadcast related information can be stored in memorizer 160 (or other types of storage medium).
Mobile communication module 112 sends radio signals to base station (for example, access point, node B etc.), exterior terminal
And at least one of server and/or receive from it radio signal.Such radio signal can be logical including voice
Words signal, video calling signal or the various types of data for sending and/or receiving according to text and/or Multimedia Message.
Wireless Internet module 113 supports the Wi-Fi (Wireless Internet Access) of mobile terminal.The module can be internally or externally
It is couple to terminal.Wi-Fi (Wireless Internet Access) technology involved by the module can include WLAN (WLAN) (Wi-Fi), Wibro
(WiMAX), Wimax (worldwide interoperability for microwave accesses), HSDPA (high-speed downlink packet access) etc..
Short range communication module 114 is the module for supporting junction service.Some examples of short-range communication technology include indigo plant
ToothTM, RF identification (RFID), Infrared Data Association (IrDA), ultra broadband (UWB), purple honeybeeTMEtc..
Location information module 115 is the module for checking or obtaining the positional information of mobile terminal.Location information module
Typical case be GPS (global positioning system).According to current technology, GPS module 115 is calculated from three or more satellites
Range information and correct time information and for calculate Information application triangulation, so as to according to longitude, latitude
Highly accurately calculate three-dimensional current location information.Currently, the method for calculating position and temporal information is defended using three
The error of star and the position that calculated by using other satellite correction and temporal information.Additionally, GPS module 115
Can be by Continuous plus current location information in real time come calculating speed information.
A/V input blocks 120 are used to receive audio or video signal.A/V input blocks 120 can include the He of camera 121
Mike 122, the static images that 121 pairs, camera is obtained in Video Capture pattern or image capture mode by image capture apparatus
Or the view data of video is processed.Picture frame after process may be displayed on display unit 151.Jing cameras 121 are processed
Picture frame afterwards can be stored in memorizer 160 (or other storage mediums) or carry out sending out via wireless communication unit 110
Send, two or more cameras 121 can be provided according to the construction of mobile terminal.Mike 122 can be in telephone calling model, note
Sound (voice data) is received via mike in record pattern, speech recognition mode etc. operational mode, and can be by so
Acoustic processing be voice data.Audio frequency (voice) data after process can be converted in the case of telephone calling model can
The form output of mobile communication base station is sent to via mobile communication module 112.Mike 122 can implement various types of making an uproar
Sound eliminates (or suppression) algorithm to eliminate the noise or dry that (or suppression) produces during reception and transmission audio signal
Disturb.
User input unit 130 can generate key input data to control each of mobile terminal according to the order of user input
Plant operation.User input unit 130 allows the various types of information of user input, and can include keyboard, metal dome, touch
Plate (for example, detection is due to the sensitive component of the change of touched and caused resistance, pressure, electric capacity etc.), roller, rocking bar etc.
Deng.Especially, when touch pad is superimposed upon in the form of layer on display unit 151, touch screen can be formed.
Sensing unit 140 detects the current state of mobile terminal 1 00, and (for example, mobile terminal 1 00 opens or closes shape
State), the presence or absence of contact (that is, touch input), the mobile terminal of the position of mobile terminal 1 00, user for mobile terminal 1 00
100 orientation, the acceleration or deceleration movement of mobile terminal 1 00 and direction etc., and generate for controlling mobile terminal 1 00
The order of operation or signal.For example, when mobile terminal 1 00 is embodied as sliding-type mobile phone, sensing unit 140 can be sensed
The sliding-type phone is opened or closed.In addition, sensing unit 140 can detect power subsystem 190 whether provide electric power or
Whether person's interface unit 170 couples with external device (ED).
Interface unit 170 is connected the interface that can pass through with mobile terminal 1 00 as at least one external device (ED).For example,
External device (ED) can include wired or wireless head-band earphone port, external power source (or battery charger) port, wired or nothing
Line FPDP, memory card port, the port for device of the connection with identification module, audio input/output (I/O) end
Mouth, video i/o port, ear port etc..Identification module can be that storage uses each of mobile terminal 1 00 for verifying user
Kind of information and subscriber identification module (UIM), client identification module (SIM), Universal Subscriber identification module (USIM) can be included
Etc..In addition, the device (hereinafter referred to as " identifying device ") with identification module can take the form of smart card, therefore, know
Other device can be connected via port or other attachment means with mobile terminal 1 00.Interface unit 170 can be used for receive from
The input (for example, data message, electric power etc.) of external device (ED) and the input for receiving is transferred in mobile terminal 1 00
One or more elements can be used for the transmission data between mobile terminal and external device (ED).
In addition, when mobile terminal 1 00 is connected with external base, interface unit 170 can serve as allowing to pass through it by electricity
Power from base provide to mobile terminal 1 00 path or can serve as allow from base be input into various command signals pass through its
It is transferred to the path of mobile terminal.Can serve as recognizing that mobile terminal is from the various command signals or electric power of base input
The no signal being accurately fitted within base.Output unit 150 is configured to provide defeated with vision, audio frequency and/or tactile manner
Go out signal (for example, audio signal, video signal, alarm signal, vibration signal etc.).Output unit 150 can include showing
Unit 151, dio Output Modules 152, alarm unit 153 etc..
Display unit 151 may be displayed on the information processed in mobile terminal 1 00.For example, when mobile terminal 1 00 is in electricity
During words call mode, display unit 151 can show and converse or other communicate (for example, text messaging, multimedia files
Download etc.) related user interface (UI) or graphic user interface (GUI).When mobile terminal 1 00 is in video calling pattern
Or during image capture mode, display unit 151 can show the image of capture and/or the image of reception, illustrate video or figure
UI or GUI of picture and correlation function etc..
Meanwhile, when the display unit 151 and touch pad touch screen with formation superposed on one another in the form of layer, display unit
151 can serve as input equipment and output device.Display unit 151 can include liquid crystal display (LCD), thin film transistor (TFT)
In LCD (TFT-LCD), Organic Light Emitting Diode (OLED) display, flexible display, three-dimensional (3D) display etc. at least
It is a kind of.Some in these display may be constructed such that transparence to allow user from outside viewing, and this is properly termed as transparent
Display, typical transparent display can be, for example, TOLED (transparent organic light emitting diode) display etc..According to specific
The embodiment wanted, mobile terminal 1 00 can include two or more display units (or other display devices), for example, move
Dynamic terminal can include outernal display unit (not shown) and inner display unit (not shown).Touch screen can be used for detection and touch
Input pressure and touch input position and touch input area.
Dio Output Modules 152 can mobile terminal in call signal reception pattern, call mode, logging mode,
It is that wireless communication unit 110 is received or in memorizer 160 when under the isotypes such as speech recognition mode, broadcast reception mode
The voice data transducing audio signal of middle storage and it is output as sound.And, dio Output Modules 152 can be provided and movement
The audio output (for example, call signal receives sound, message sink sound etc.) of the specific function correlation that terminal 100 is performed.
Dio Output Modules 152 can include speaker, buzzer etc..
Alarm unit 153 can provide output so that event is notified to mobile terminal 1 00.Typical event can be with
Including calling reception, message sink, key signals input, touch input etc..In addition to audio or video is exported, alarm unit
153 can in a different manner provide output with the generation of notification event.For example, alarm unit 153 can be in the form of vibrating
Output is provided, when calling, message or some other entrance communication (incomingcommunication) are received, alarm list
Unit 153 can provide tactile output (that is, vibrating) to notify to user.By providing such tactile output, even if
When the mobile phone of user is in the pocket of user, user also can recognize that the generation of various events.Alarm unit 153
The output of the generation of notification event can be provided via display unit 151 or dio Output Modules 152.
Memorizer 160 can store software program for the process and control operation performed by controller 180 etc., Huo Zheke
With the data (for example, telephone directory, message, still image, video etc.) for temporarily storing own Jing outputs or will export.And
And, memorizer 160 can be storing the vibration of various modes with regard to exporting when touching and being applied to touch screen and audio signal
Data.
Memorizer 160 can include the storage medium of at least one type, and the storage medium includes flash memory, hard disk, many
Media card, card-type memorizer (for example, SD or DX memorizeies etc.), random access storage device (RAM), static random-access storage
Device (SRAM), read only memory (ROM), Electrically Erasable Read Only Memory (EEPROM), programmable read only memory
(PROM), magnetic storage, disk, CD etc..And, mobile terminal 1 00 can perform memorizer with by network connection
The network storage device cooperation of 160 store function.
The overall operation of the generally control mobile terminal of controller 180.For example, controller 180 is performed and voice call, data
The related control of communication, video calling etc. and process.In addition, controller 180 can be included for reproducing (or playback) many matchmakers
The multi-media module 181 of volume data, multi-media module 181 can be constructed in controller 180, or is so structured that and control
Device 180 is separated.Controller 180 can be with execution pattern identifying processing, by the handwriting input for performing on the touchscreen or picture
Draw input and be identified as character or image.
Power subsystem 190 receives external power or internal power under the control of controller 180 and provides operation each unit
Appropriate electric power needed for part and component.
Extraction module 210, detection module 220 and control module 230 enter action in video display process to play frame rate
State is adjusted.
Various embodiments described herein can be with using such as computer software, hardware or its any combination of calculating
Machine computer-readable recording medium is implementing.For hardware is implemented, embodiment described herein can be by using application-specific IC
(ASIC), digital signal processor (DSP), digital signal processing device (DSPD), programmable logic device (PLD), scene can
Programming gate array (FPGA), processor, controller, microcontroller, microprocessor, it is designed to perform function described herein
Implementing, in some cases, such embodiment can be implemented at least one in electronic unit in controller 180.
For software is implemented, the embodiment of such as process or function can with allow to perform the single of at least one function or operation
Software module is implementing.Software code can be come by the software application (or program) write with any appropriate programming language
Implement, software code can be stored in memorizer 160 and be performed by controller 180.
So far, own Jing describes mobile terminal according to its function.Below, for the sake of brevity, will description such as folded form,
Slide type mobile terminal in various types of mobile terminals of board-type, oscillating-type, slide type mobile terminal etc. is used as showing
Example.Therefore, the present invention can be applied to any kind of mobile terminal, and be not limited to slide type mobile terminal.
As shown in Figure 1 mobile terminal 1 00 may be constructed such that using via frame or packet transmission data it is all if any
Line and wireless communication system and satellite-based communication system are operating.
The communication system that mobile terminal wherein of the invention is operable to is described referring now to Fig. 2.
Such communication system can use different air interface and/or physical layer.For example, used by communication system
Air interface includes such as frequency division multiple access (FDMA), time division multiple acess (TDMA), CDMA (CDMA) and universal mobile communications system
System (UMTS) (especially, Long Term Evolution (LTE)), global system for mobile communications (GSM) etc..As non-limiting example, under
The description in face is related to cdma communication system, but such teaching is equally applicable to other types of system.
With reference to Fig. 2, cdma wireless communication system can include multiple mobile terminal 1s 00, multiple base stations (BS) 270, base station
Controller (BSC) 275 and mobile switching centre (MSC) 280.MSC280 is configured to and Public Switched Telephony Network (PSTN)
290 form interface.MSC280 is also structured to form interface with the BSC275 that can be couple to base station 270 via back haul link.
If any one that back haul link can be in the interface that Ganji knows is constructing, the interface includes such as E1/T1, ATM, IP,
PPP, frame relay, HDSL, ADSL or xDSL.It will be appreciated that as shown in Figure 2 system can include multiple BSC275.
Each BS270 can service one or more subregions (or region), by multidirectional antenna or the day of sensing specific direction
Each subregion that line is covered is radially away from BS270.Or, each subregion can by for diversity reception two or more
Antenna is covered.Each BS270 may be constructed such that the multiple frequency distribution of support, and each frequency distribution has specific frequency spectrum
(for example, 1.25MHz, 5MHz etc.).
What subregion and frequency were distributed intersects can be referred to as CDMA Channel.BS270 can also be referred to as base station transceiver
System (BTS) or other equivalent terms.In this case, term " base station " can be used for broadly representing single
BSC275 and at least one BS270.Base station can also be referred to as " cellular station ".Or, each subregion of specific BS270 can be claimed
For multiple cellular stations.
As shown in Figure 2, broadcast singal is sent to broadcsting transmitter (BT) 295 mobile terminal operated in system
100.As shown in Figure 1 broadcasting reception module 111 is arranged at mobile terminal 1 00 to receive the broadcast sent by BT295
Signal.In fig. 2 it is shown that several global positioning system (GPS) satellites 300.Satellite 300 helps position multiple mobile terminals
At least one of 100.
In fig. 2, multiple satellites 300 are depicted, it is understood that be, it is possible to use any number of satellite obtains useful
Location information.As shown in Figure 1 GPS module 115 is generally configured to coordinate to obtain the positioning wanted letter with satellite 300
Breath.Substitute GPS tracking techniques or outside GPS tracking techniques, it is possible to use can track the position of mobile terminal other
Technology.In addition, at least one gps satellite 300 can optionally or additionally process satellite dmb transmission.
Used as a typical operation of wireless communication system, BS270 receives the reverse link from various mobile terminal 1s 00
Signal.Mobile terminal 1 00 generally participates in call, information receiving and transmitting and other types of communication.Each of the reception of certain base station 270 is anti-
Processed in specific BS270 to link signal.The data of acquisition are forwarded to the BSC275 of correlation.BSC provides call
Resource allocation and the mobile management function of the coordination including the soft switching process between BS270.BSC275 is also by the number for receiving
According to MSC280 is routed to, it provides the extra route service for forming interface with PSTN290.Similarly, PSTN290 with
MSC280 forms interface, and MSC and BSC275 form interface, and BSC275 correspondingly controls BS270 with by forward link signals
It is sent to mobile terminal 1 00.
Based on above-mentioned mobile terminal hardware configuration and communication system, each embodiment of terminal of the present invention is proposed.
As shown in figure 3, first embodiment of the invention proposes a kind of terminal, including：
Extraction module 210, for according to the extracting cycle of reproduction time order and setting, from the beginning of default initial time
Extract the frame of video for playing video；
Detection module 220, for for the two adjacent frame frame of video extracted, detecting the image difference of the two frames frame of video
Different degree；
Control module 230, for according to described image diversity factor, in detection node, adjusting the play frame rate of the video；
The detection node is the corresponding timing node of the posterior frame of video of reproduction time in the two frames frame of video.
Furtherly, the extracting cycle is time cycle or frame number cycle.For example, the two frames frame of video is regarded for first
Frequency frame and the second frame of video；Wherein the first frame of video and the second frame of video can be two that interval time is A (i.e. time cycle)
The frame of video of individual frame of video, or frame number at intervals of N (frame number cycle)；Wherein A and N are the natural number more than 1.
Furtherly, initial time can be arranged according to practical situation, for example, can arrange the play start time of video,
It can also be provided that the frame of video of the first frame corresponding time when video is broadcast.
Play frame rate (Frame rate) is to show measuring for frame number for measurement.So-called units of measurement is display per second
Frame number (Frames per Second, referred to as：FPS) or " hertz " (Hz).
Due to the special physiological structure of human eye, if the frame per second of seen picture is higher than 24, will be considered
Coherent, this phenomenon is referred to as persistence of vision.
In prior art, terminal by playout software play video when, once have selected video playback definition (SD,
High definition, blue light), that is, determine video playback frame per second, then play frame rate just will not change in whole playing process, except inhuman
For Switch Video play mode.
However, frame number (FPS) per second when in other words frame per second represents graphic process unit Treatment stations each second can update
Number of times.High frame per second can obtain video effect more smooth, more true to nature.In general 30fps is exactly acceptable, but
Performance boost to 60fps can be then obviously improved interaction sense and realism, but in general typically just do not allowed more than 75fps
Easily perceive obvious fluency to improve.
Play simultaneously during video, generally, higher play frame rate can be adopted in video playback, now one
The ability of graphics process can be only wasted into constant higher play frame rate, the long-term burden that processor is unnecessary is not only caused, together
When can also increase corresponding power consumption；
Also in the case of having, relatively low play frame rate can be adopted in video playback, although now reducing processor
Burden, but long-term relatively low play frame rate, present to the relatively low visual effect of user, therefore bring to user bad
Experience.
Based on this, the embodiment of the present invention by the extracting cycle according to reproduction time order and setting, from default initial
Time starts to extract the frame of video for playing video, and the two adjacent frame frame of video for extracting, and detects the two frames frame of video
Image difference degree, and according to described image diversity factor, in detection node, the play frame rate of the video is adjusted, so as to reality
The dynamic adjustment of the play frame rate of video is now played, and then effectively the processor resource taken during video, effectively drop are played in mitigation
The burden of low processor, effectively reduces the power consumption of terminal, improves the use time of end cell, further increases user's body
Test.Meanwhile, in the dynamic adjustment process of play frame rate, it is also possible to improve the visual effect of video playback, further improve
Consumer's Experience.
Summary embodiment of the present invention principle：
Inventor has found that to the human eye the video for being not each section is all to need very high play frame rate, is based on
This, can pass through the pace of change of picture material in detection video, dynamically to adjust play frame rate.
Specifically, the image difference degree for periodically detecting adjacent two frames frame of video is passed through in the embodiment of the present invention, is judged
Play the pace of change of the video image content of video.
When image difference degree is larger, i.e., picture material pace of change is very fast, now can be according to higher play frame rate
Play video；
When image difference degree is less, i.e. picture material pace of change is slower, now can be according to relatively low play frame rate
Play video.
Based on this adjustment mode, realize playing the dynamic adjustment of the play frame rate of video.
On the basis of first embodiment, it is further proposed that the variant embodiment of first embodiment, here needs explanation
It is, in order that description is brief, the difference with first embodiment only to be described in each variant embodiment.
In one embodiment of the invention, the control module 230, if reaching specifically for described image diversity factor pre-
If during the first adjustment threshold value, in the detection node, according to default adjustable strategies, improving the play frame rate of the video；If
When described image diversity factor is less than default second adjustment threshold value, in the detection node, according to default adjustable strategies, institute is reduced
State the play frame rate of video；The first adjustment threshold value is more than the described second adjustment threshold value.
Furtherly, the control module 230 is additionally operable to analysis and plays video, obtains the maximum of broadcasting video and plays frame
Rate, and obtain the corresponding play frame rate of each definition for playing video.
According to default adjustable strategies in the embodiment of the present invention, the play frame rate of the video is improved, including：
Currently playing frame per second is brought up in the range of the corresponding play frame rate of highest definition, or is brought up to currently clearly
Spend more than corresponding maximum play frame rate；
According to default adjustable strategies, the play frame rate of the video is reduced, including：
Currently playing frame per second is reduced in the range of the corresponding play frame rate of visibility minimum, or is reduced to currently clearly
Spend below corresponding minimum play frame rate.
The embodiment of the present invention improves the efficiency of dynamic adjustment play frame rate by way of threshold value.
In another embodiment of the present invention, the control module 230, specifically for according to default image difference degree
The corresponding relation of scope and play frame rate, in the detection node, by the corresponding currently playing frame per second of the video be adjusted to
The corresponding play frame rate of image difference degree for detecting.
In embodiments of the present invention, can obtain multiple batches of image difference degree scope, play beforehand through repeatedly test
The data of processor resource occupancy during frame per second, the visual effect of video and processor process frame of video；
According to the visual effect data and processor resource occupancy data of the video, play frame rate is determined；
Image difference degree scope is determined according to play frame rate.
Specifically, the visual effect data of multiple batches of video are divided into at least three classes, such as best effects, worst effect and
Better effects；Multiple batches of occupancy data are divided into corresponding maximum occupancy, minimum occupancy and relatively low occupancy；So as to true
Fixed relatively low occupancy and the corresponding video frame rate scope of better effects, so that it is determined that image difference degree scope.
In yet another embodiment of the present invention, the detection module 220, specifically for the pixel-parameters that basis is selected,
The variance of the corresponding pixel-parameters of the two frames frame of video is determined respectively, using the absolute difference of two variances for determining as institute
State image difference degree；
Specifically, the selected pixel-parameters of the basis, determine respectively the corresponding pixel-parameters of the two frames frame of video
Variance, using the absolute difference of two variances for determining as described image diversity factor, including：
For arbitrary frame of video, according to the rgb value of each pixel of the frame of video, it is determined that the corresponding picture of described each pixel
Plain parameter value；
According to each pixel-parameters value, the meansigma methodss of the pixel-parameters value of the frame of video all pixels are determined；
According to described each pixel-parameters value and the meansigma methodss, it is determined that the corresponding pixel-parameters side of described each pixel
Difference；
According to each variance, the variance of the corresponding pixel-parameters of the frame of video is determined.
Wherein, selected pixel-parameters are grey parameter or luminance parameter.
As a example by grey parameter, the determination principle of the variance of the corresponding pixel-parameters of frame of video is sketched.
Each grey scale pixel value X is calculated according to the rgb value of each pixel in arbitrary frame of video, is calculated in the frame of video and is owned
The average gray of pixel, obtains average gray E (X).
Gray variance D (x) of the frame of video, or the video are calculated according to the gray value and average gray of each pixel
The gray standard deviation of frame.
Wherein, gray variance
D (X)=E { Σ [X-E (X)] }；
Wherein, gray standard deviation
By said method, the gray variance D (X) 1 of the first frame of video and gray variance D of the second frame of video can be obtained
(X)2。
Furtherly, the difference of the gray variance D (X) 2 of the gray variance D (X) 1 and the second frame of video of the first frame of video is calculated
Value B.
Further say, if the value of difference B is less than a preset value, illustrate that the first frame of video and the content of the second frame of video become
Change less, control module 230 then accordingly turns down video playback frame per second, if the value of difference B is more than a preset value, illustrate the first video
The content change of frame and the second frame of video is very big, needs higher video playback frame per second just to can guarantee that the definition of video playback,
Control module 230 then lifts video playback frame.
Certainly the incidence relation of difference value B and video playback frame can also be prestored, can is that different difference values B are assigned
Give different video playback frame per second.
Certainly, above-mentioned algorithm can also be utilized to calculate the change of luminance parameter in the first frame of video and the second frame of video, is entered
And show the change speed of the first frame of video and the second video frame content information for obtaining, and then video playback frame is adjusted accordingly
Rate.
Alternatively, the detection module 220, specifically for the two frames frame of video carrying out face-image identification respectively,
The quantity of the two frames frame of video septum reset image is determined respectively, using the absolute difference of two quantity for determining as the figure
As diversity factor；
That is, carrying out face-image identification to first frame of video and second frame of video respectively, institute is determined
The first quantity of the first frame of video septum reset image and the second quantity of the second frame of video septum reset image are stated, by described
The absolute difference of two quantity and first quantity is used as described image diversity factor.
Can judge whether two video frame contents occur by the quantity variance of face-image in the embodiment of the present invention
Change, and how many speeds of change, so as to adjust video playback frame per second accordingly.
Alternatively, the detection module 220, specifically for carrying out face-image identification to first frame of video, is knowing
Do not go out in first frame of video have at least one face-image when, for arbitrary face-image, record the image described
First position information in first frame of video, and extract the characteristics of image of the face-image；According to described image feature described
The face-image is searched in second frame of video, if finding, second of the face-image in second frame of video is recorded
Confidence ceases；If not finding, the second position information is set to into 0；By the second position information and the first position
The absolute difference of information is used as described image diversity factor；
That is, several keys in the first frame of video obtained by analysis in the embodiment of the present invention and the second frame of video
Picture detail, such as face, by face in the pixel coordinate meansigma methodss and the second frame of video of face in the first frame of video of analysis
Pixel coordinate meansigma methodss, if both coordinate meansigma methodss differences C are more than a preset value, illustrate the generations of two video frame contents
Very fast change, then adjust accordingly video playback frame per second, it is ensured that the definition of video playback；If both average value differences of coordinate
Value C is less than a preset value, then illustrate that two video frame contents do not occur very fast change, then turn down video playback frame accordingly
Rate.Certainly, in advance different video playback frame per second can also be given for different coordinate mean difference C.
Alternatively, the detection module 220, specifically for the dividing number by setting, respectively by the two frames frame of video
Multiple two field pictures are divided into, the two field picture at same position in the two frames frame of video is compared successively；According to comparison result, record
The unmatched number of times of two field picture, using the ratio of the number of times and the dividing number as described image diversity factor.
Specifically, by the dividing number of setting, first frame of video and second frame of video are divided into respectively many
Individual two field picture, compares successively the two field picture at same position in first frame of video and second frame of video；According to comparison
As a result, the unmatched number of times of two field picture is recorded, using the ratio of the number of times and the dividing number as described image diversity factor.
That is, two video frame contents can be judged by the difference of two images whether in the embodiment of the present invention
Change, and how many speeds of change, so as to adjust video playback frame per second accordingly.
Terminal obtains the state that current video is played by pre-defined rule in the embodiment of the present invention, and dynamic adjustment video is broadcast
The play frame rate put, both ensure that the definition of video playback, can also be on the premise of Consumer's Experience is met, and appropriateness reduces regarding
The work load of frequency playback process device, reduces the power consumption of mobile device.
The present invention further provides a kind of video playing control method.
With reference to Fig. 4, a kind of video playing control method in the embodiment of the present invention, including step：
S401, according to reproduction time order and the extracting cycle of setting, starts extraction broadcasting and regards from default initial time
The frame of video of frequency；
S402, for the two adjacent frame frame of video extracted, detects the image difference degree of the two frames frame of video；
S403, according to described image diversity factor, in detection node, adjusts the play frame rate of the video；The detection section
Point is the corresponding timing node of the posterior frame of video of reproduction time in the two frames frame of video.
Furtherly, the extracting cycle is time cycle or frame number cycle.
In one embodiment of the invention, it is described according to described image diversity factor, in detection node, adjust the video
Play frame rate, including：
If described image diversity factor reaches default first adjustment threshold value, in the detection node, according to default adjustment
Strategy, improves the play frame rate of the video；If described image diversity factor is less than default second adjustment threshold value, in the detection
Node, according to default adjustable strategies, reduces the play frame rate of the video；The first adjustment threshold value is adjusted more than described second
Whole threshold value；Or,
According to default image difference degree scope and the corresponding relation of play frame rate, in the detection node, regard described
Frequently corresponding currently playing frame per second is adjusted in the range of play frame rate corresponding with the image difference degree for detecting.
In another embodiment of the present invention, the two frames frame of video is the first frame of video and the second frame of video；It is described
The image difference degree of the two frames frame of video is detected, including：
According to selected pixel-parameters, the variance of the corresponding pixel-parameters of the two frames frame of video is determined respectively, will determine
Two variances absolute difference as described image diversity factor；Or,
Respectively face-image identification is carried out to the two frames frame of video, the two frames frame of video septum reset image is determined respectively
Quantity, using determine two quantity absolute difference as described image diversity factor；Or,
By the dividing number of setting, respectively the two frames frame of video is divided into into multiple two field pictures, described two are compared successively
Two field picture in frame frame of video at same position；According to comparison result, the unmatched number of times of record two field picture, by the number of times with
The ratio of the dividing number is used as described image diversity factor；Or,
Face-image identification is carried out to first frame of video, has at least one in first frame of video is identified
During face-image, for arbitrary face-image, first position information of the image in first frame of video is recorded, and extracted
The characteristics of image of the face-image；The face-image is searched in second frame of video according to described image feature, if searching
Arrive, record second position information of the face-image in second frame of video；If not finding, by the second confidence
Breath is set to 0；Using the absolute difference of the second position information and the first position information as described image diversity factor.
Specifically, the selected pixel-parameters of the basis, determine respectively the corresponding pixel-parameters of the two frames frame of video
Variance, including：
For arbitrary frame of video, according to the rgb value of each pixel of the frame of video, it is determined that the corresponding picture of described each pixel
Plain parameter value；
According to each pixel-parameters value, the meansigma methodss of the pixel-parameters value of the frame of video all pixels are determined；
According to described each pixel-parameters value and the meansigma methodss, it is determined that the corresponding pixel-parameters side of described each pixel
Difference；
According to each variance, the variance of the corresponding pixel-parameters of the frame of video is determined.
The embodiment of the present invention by according to reproduction time order and setting extracting cycle, from the beginning of default initial time
The frame of video for playing video, and the two adjacent frame frame of video for extracting are extracted, the image difference of the two frames frame of video is detected
Different degree, and according to described image diversity factor, in detection node, the play frame rate of the video is adjusted, so as to realize that broadcasting is regarded
The dynamic adjustment of the play frame rate of frequency, and then effectively mitigate the processor resource taken during broadcasting video, effectively reduce processor
Burden, effectively reduce the power consumption of terminal, improve the use time of end cell, further increase Consumer's Experience.Meanwhile,
In the dynamic adjustment process of play frame rate, it is also possible to improve the visual effect of video playback, Consumer's Experience is further improved.
It should be noted that herein, term " including ", "comprising" or its any other variant are intended to non-row
His property is included, so that a series of process, method, article or device including key elements not only include those key elements, and
And also include other key elements being not expressly set out, or also include for this process, method, article or device institute inherently
Key element.In the absence of more restrictions, the key element for being limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
Also there is other identical element in the process of key element, method, article or device.
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 is substantially done to prior art in other words
Going out the part of contribution can be embodied in the form of software product, and the computer software product is stored in a storage medium
In (such as ROM/RAM, magnetic disc, CD), including some instructions are used so that a station terminal equipment (can be mobile phone, computer takes
Business device, air-conditioner, or network equipment etc.) perform method described in each embodiment of the invention.
The preferred embodiments of the present invention are these are only, the scope of the claims of the present invention is not thereby limited, it is every using this
Equivalent structure or equivalent flow conversion that bright description and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of terminal, it is characterised in that the terminal includes：
Extraction module, for according to the extracting cycle of reproduction time order and setting, starting extraction from default initial time and broadcasting
Put the frame of video of video；
Detection module, for for the two adjacent frame frame of video extracted, detecting the image difference degree of the two frames frame of video；
Control module, for according to described image diversity factor, in detection node, adjusting the play frame rate of the video；The inspection
It is the corresponding timing node of the posterior frame of video of reproduction time in the two frames frame of video to survey node.
2. terminal as claimed in claim 1, it is characterised in that the extracting cycle is time cycle or frame number cycle.
3. terminal as claimed in claim 1, it is characterised in that the control module, if specifically for described image diversity factor
When reaching default first adjustment threshold value, in the detection node, according to default adjustable strategies, the broadcasting frame of the video is improved
Rate；If described image diversity factor is less than default second adjustment threshold value, in the detection node, according to default adjustable strategies,
Reduce the play frame rate of the video；The first adjustment threshold value is more than the described second adjustment threshold value；Or,
Specifically for the corresponding relation according to default image difference degree scope and play frame rate scope, in the detection node,
The corresponding currently playing frame per second of the video is adjusted in the range of play frame rate corresponding with the image difference degree for detecting.
4. the terminal as described in any one in claim 1-3, it is characterised in that the detection module, specifically for basis
Selected pixel-parameters, determine respectively the variance of the corresponding pixel-parameters of the two frames frame of video, by two variances for determining
Absolute difference is used as described image diversity factor；Or,
Specifically for the two frames frame of video carrying out face-image identification respectively, the two frames frame of video septum reset is determined respectively
The quantity of image, using the absolute difference of two quantity for determining as described image diversity factor；Or,
Specifically for the dividing number by setting, respectively the two frames frame of video is divided into into multiple two field pictures, institute is compared successively
State the two field picture at same position in two frame frame of video；According to comparison result, the unmatched number of times of record two field picture, by described time
Number is with the ratio of the dividing number as described image diversity factor；Or,
Specifically for carrying out face-image identification to first frame of video, have at least in first frame of video is identified
During one face-image, for arbitrary face-image, first position information of the image in first frame of video is recorded, and
Extract the characteristics of image of the face-image；The face-image is searched in second frame of video according to described image feature, if
Find, record second position information of the face-image in second frame of video；If not finding, by the second
Confidence breath is set to 0；The second position information is poor as described image with the absolute difference of the first position information
Different degree；The two frames frame of video is the first frame of video and the second frame of video.
5. terminal as claimed in claim 4, it is characterised in that the selected pixel-parameters of the basis, determines respectively described two
The variance of the corresponding pixel-parameters of frame frame of video, using the absolute difference of two variances for determining as described image diversity factor,
Including：
For arbitrary frame of video, according to the rgb value of each pixel of the frame of video, it is determined that the corresponding pixel ginseng of described each pixel
Numerical value；
According to each pixel-parameters value, the meansigma methodss of the pixel-parameters value of the frame of video all pixels are determined；
According to described each pixel-parameters value and the meansigma methodss, it is determined that the corresponding pixel-parameters variance of described each pixel；
According to each variance, the variance of the corresponding pixel-parameters of the frame of video is determined.
6. a kind of video playing control method, it is characterised in that methods described includes step：
According to reproduction time order and the extracting cycle of setting, start to extract the video for playing video from default initial time
Frame；
For the two adjacent frame frame of video extracted, the image difference degree of the two frames frame of video is detected；
According to described image diversity factor, in detection node, the play frame rate of the video is adjusted；The detection node is described two
The corresponding timing node of the posterior frame of video of reproduction time in frame frame of video.
7. method as claimed in claim 6, it is characterised in that the extracting cycle is time cycle or frame number cycle.
8. method as claimed in claim 6, it is characterised in that described according to described image diversity factor, in detection node, adjustment
The play frame rate of the video, including：
If described image diversity factor reaches default first adjustment threshold value, in the detection node, according to default adjustable strategies,
Improve the play frame rate of the video；If described image diversity factor is less than default second adjustment threshold value, in the detection node,
According to default adjustable strategies, the play frame rate of the video is reduced；The first adjustment threshold value is more than the described second adjustment threshold
Value；Or,
According to default image difference degree scope and the corresponding relation of play frame rate, in the detection node, by the video pair
The currently playing frame per second answered is adjusted in the range of play frame rate corresponding with the image difference degree for detecting.
9. the method as described in any one in claim 6-8, it is characterised in that the two frames frame of video is the first frame of video
With the second frame of video；The image difference degree for detecting the two frames frame of video, including：
According to selected pixel-parameters, the variance of the corresponding pixel-parameters of the two frames frame of video is determined respectively, two for determining
The absolute difference of individual variance is used as described image diversity factor；Or,
Respectively face-image identification is carried out to the two frames frame of video, the number of the two frames frame of video septum reset image is determined respectively
Amount, using the absolute difference of two quantity for determining as described image diversity factor；Or,
By the dividing number of setting, respectively the two frames frame of video is divided into into multiple two field pictures, two frame is compared successively and is regarded
Two field picture in frequency frame at same position；According to comparison result, the unmatched number of times of record two field picture, by the number of times with it is described
The ratio of dividing number is used as described image diversity factor；Or,
Face-image identification is carried out to first frame of video, it is facial with least one in first frame of video is identified
During image, for arbitrary face-image, first position information of the image in first frame of video is recorded, and extract the face
The characteristics of image of portion's image；The face-image is searched in second frame of video according to described image feature, if finding, note
Record second position information of the face-image in second frame of video；If not finding, the second position information is set
It is set to 0；Using the absolute difference of the second position information and the first position information as described image diversity factor.
10. method as claimed in claim 9, it is characterised in that the selected pixel-parameters of the basis, determines respectively described two
The variance of the corresponding pixel-parameters of frame frame of video, including：
For arbitrary frame of video, according to the rgb value of each pixel of the frame of video, it is determined that the corresponding pixel ginseng of described each pixel
Numerical value；
According to each pixel-parameters value, the meansigma methodss of the pixel-parameters value of the frame of video all pixels are determined；
According to described each pixel-parameters value and the meansigma methodss, it is determined that the corresponding pixel-parameters variance of described each pixel；
According to each variance, the variance of the corresponding pixel-parameters of the frame of video is determined.
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