CN106572352B - A kind of key frame sign control method and device - Google Patents
A kind of key frame sign control method and device Download PDFInfo
- Publication number
- CN106572352B CN106572352B CN201610917915.8A CN201610917915A CN106572352B CN 106572352 B CN106572352 B CN 106572352B CN 201610917915 A CN201610917915 A CN 201610917915A CN 106572352 B CN106572352 B CN 106572352B
- Authority
- CN
- China
- Prior art keywords
- frame
- key frame
- quantization parameter
- encoded
- complexity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
- H04N19/172—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a picture, frame or field
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/115—Selection of the code volume for a coding unit prior to coding
Abstract
The invention discloses a kind of crucial frame sign control method and device.In this method, according to the complexity of encoded frame, the complexity of the key frame of pending coding is estimated, and obtain the first quantization parameter for being used for coding, according to complexity and the first quantization parameter, whether the size after estimating key frame coding is more than preset threshold, if estimated result is more than preset threshold, then determine the second quantization parameter, it is encoded according to the second quantization parameter, so that coding after crucial frame sign be less than or equal to preset threshold, to avoid key frame it is excessive caused by abnormal problem, and then influence video quality.
Description
Technical field
The present invention relates to field of video encoding more particularly to a kind of crucial frame sign control method and device.
Background technique
The data volume of video image is bigger, it usually needs it encoded, the data after coding are known as video code flow,
Video code flow is by wired or wireless network transmissions to user terminal, then is decoded viewing.Above-mentioned steps mainly include coding,
Transmission, decoding etc., in those steps due to being limited by hardware or other conditions, it will usually to compressed video code flow
Size there are certain requirements, for example there are upper limit values for network transmission.
Key frame in Video coding is also known as I frame, is the volume in cataloged procedure independent of other encoded video frames
Code frame, can carry out independent decoding to I frame code stream, usually using I frame as random access frame in practical application.To realize independent solution
The purpose of code, I frame coding can only use intra prediction, and without can be carried out inter-prediction, (usual inter-prediction is more than intra prediction
Data redundancy can be eliminated), cause the size for encoding I frame bigger.However, in many application systems all can to coding after I frame
Size it is restricted.
The purpose of rate control algorithm is that Video coding is distorted as far as possible while accurately reaching target bit rate in encoder
It is small.And code rate refers to the total size of code stream in a period of time, rate control algorithm only reaches code stream within a certain period of time
Target value usually can not accurately limit the coding size of frame a certain in cataloged procedure.Therefore, this method is unable to satisfy
The demand that I frame sign is precisely limited.
A kind of estimation method of the I frame sign based on edge strength, after integral edge intensity and I the frame compression of I frame
Mathematical correlation between frame sign selects quantization parameter.Specifically, whole based on being determined during the pretreatment of particular frame
Edge intensity value computing simultaneously selects the quantization parameter for the particular frame according to the target frame sign that reference decoder buffer area provides.Choosing
The optimal compression matter of I frame is kept while the quantization parameter selected out allows to work in the available code rate provided by reference decoder
Amount.Party's law theory foundation be I frame integral edge intensity and I frame coding after size have good mathematical correlation, but
It is from the point of view of the relational graph of its edge strength provided and frame sign, correlation is not fine.Secondly, this method needs to calculate
Integral edge intensity, and it is not usually the calculative amount of encoder cataloged procedure that edge strength, which calculates, therefore, this method increases
The overhead of encoder.Again, this method is according to the size of decoding buffer zone residue available space in conjunction with edge strength
Obtained quantization parameter, the size after I frame encodes is not exceed to distribute to the big of I frame by decoding buffer zone remaining space
It is small, but the size that cannot limit I frame meets preset range.
Therefore, there is presently no the methods controlled for I frame sign.
Summary of the invention
The present invention provides a kind of I frame sign control method and device, to realize that the size to I frame limits.
I frame sign control method provided in an embodiment of the present invention, comprising:
According to the complexity of encoded frame, the complexity of key frame to be encoded is estimated；
Obtain the first quantization parameter for coding；
Size according to the complexity of the key frame and first quantization parameter, after estimating the key frame coding
It whether is more than preset threshold；
If estimating, the size after the key frame coding is more than preset threshold, it is determined that the second quantization parameter；According to described
The size for the key frame that second quantization parameter encodes is less than or equal to preset threshold；
The key frame is encoded according to second quantization parameter.
Optionally, the complexity according to encoded frame, estimates the complexity of key frame to be encoded, packet
It includes:
According to the former frame of key frame to be encoded or the complexity of preceding multiframe, to the complexity of key frame to be encoded into
Row estimation.
Optionally, the complexity according to encoded frame, estimates the complexity of key frame to be encoded, packet
It includes:
And, absolute error to key frame to be encoded and estimated according to the absolute error of encoded frame；
The complexity according to the key frame and first quantization parameter, after estimating the key frame coding
Whether size is more than preset threshold, comprising:
According to the absolute error of the key frame and and first quantization parameter, after estimating key frame coding
Whether size is more than preset threshold.
Optionally, this method, further includes:
If estimating, the size of the key frame is less than preset threshold, encodes the pass according to first quantization parameter
Key frame.
Optionally, the preset threshold of the crucial frame sign, according to network transfer speeds and network transport latency
Maximum value determines.
I frame sign control device provided in an embodiment of the present invention, comprising:
First estimation module estimates the complexity of key frame to be encoded for the complexity according to encoded frame
Meter；
Module is obtained, for obtaining the first quantization parameter for being used for coding；
Second estimation module, for according to the key frame complexity and first quantization parameter, described in estimation
Whether the size after key frame coding is more than preset threshold；
Determining module, if for estimating that the size after the key frame coding is more than preset threshold, it is determined that the second quantization
Parameter；According to the size for the key frame that second quantization parameter encodes, it is less than or equal to preset threshold；
Coding module, for encoding the key frame according to second quantization parameter.
Optionally, first estimation module, is specifically used for:
According to the former frame of key frame to be encoded or the complexity of preceding multiframe, to the complexity of key frame to be encoded into
Row estimation.
Optionally, first estimation module, is specifically used for:
And, absolute error to key frame to be encoded and estimated according to the absolute error of encoded frame；
Second estimation module, is specifically used for:
According to the absolute error of the key frame and and first quantization parameter, after estimating key frame coding
Whether size is more than preset threshold.
Optionally, the coding module is also used to:
If estimating, the size of the key frame is less than preset threshold, encodes the pass according to first quantization parameter
Key frame.
Optionally, the preset threshold of the crucial frame sign, according to network transfer speeds and network transport latency
Maximum value determines.
In the above embodiment of the present invention, according to the complexity of encoded frame, the complexity of I frame to be encoded is estimated
Meter, and the first quantization parameter for coding is obtained, it is big after estimating I frame coding according to complexity and the first quantization parameter
Whether small be more than preset threshold, if estimated result is more than preset threshold, it is determined that the second quantization parameter is joined according to the second quantization
Number encoded so that coding after I frame sign be less than or equal to preset threshold, to avoid I frame it is excessive caused by ask extremely
Topic, and then influence video quality.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without any creative labor, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is the flow diagram of I frame sign control method provided in an embodiment of the present invention；
Fig. 2 is the flow diagram of specific embodiment provided in an embodiment of the present invention；
Fig. 3 is the flow diagram of I frame sign control device provided in an embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that the described embodiments are only some of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
I frame is the important references frame in interframe compression coding, is the coded frame of a full frame data compression, and when decoding only uses I
The data of frame can reconstruct current and back complete image.For example, terminal is sent to micro-control unit
(Microcontroller Unit, abbreviation MCU) is not that complete width picture is sent to distal end every time, but only
Latter width picture changed part on previous width field basis is sent, if Network status is bad, terminal is sent to remotely
Picture will exist occur because of packet loss image flower screen, image Caton the phenomenon that, in this case if there is no I frame mechanism
Terminal is allowed to retransmit the new complete image of a width to distal end, the flower screen of distal end output image, Caton phenomenon can be increasingly tighter
Weight.
In order to solve due to I frame it is excessive caused by abnormal problem, for example, being caused due to the limitation of network transfer speeds
Within a preset time without the transmission of completion I frame, the embodiment of the invention provides a kind of I frame sign control methods, on solving
State problem.
It is the flow diagram of I frame sign control method provided in an embodiment of the present invention, as shown, the party referring to Fig. 1
Method the following steps are included:
Step 101, according to the complexity of encoded frame, the complexity of I frame to be encoded is estimated.
In above-mentioned steps 101, it is alternatively possible to according to the former frame of I frame to be encoded or the complexity of preceding multiframe
Degree, estimates the complexity of I frame to be encoded.
Optionally, complexity can be characterized with absolute error and (SAD), i.e., according to the SAD of encoded frame to I to be encoded
The SAD of frame is estimated.
For example, I frame to be encoded can be estimated according to the SAD of former frame according to the mathematical relationship as shown in formula (1)
SAD.
SADcur=a*SADpre+b (1)
Wherein, SADcurIndicate the complexity of I frame to be encoded, SADpreIndicate the complexity of former frame, a and b distinguish table
Show empirical coefficient, which can count by the SAD in advance to a certain number of video frames, fit a, b
Value.
Optionally, it can also be counted according to the SAD of the I frame of certain data, determine reflecting for I frame and the SAD of previous I frame
Penetrate relationship；When the SAD of the I frame to pending coding estimates, closed according to the SAD of previous I frame and the mapping counted
System, determines the SAD of I frame to be encoded.
Step 102 obtains the first quantization parameter for being used for coding.
The relating to parameters that size and encoder after coding video frames select in an encoding process, these parameters include mould
Formula, motion information, quantization parameter (Quantization Parameter, abbreviation QP) etc..Select different parameters can be to final
The coding bit rate of video has an impact.In these parameters, quantization parameter control is lost during damaging quantification treatment
The size of data volume has direct influence to the size of frame after coding.Lesser quantization parameter ensure that more bits are used
It is encoded in image, spatial detail as much as possible can be provided when video is rebuild；Larger quantization parameter ensure that output code
Rate does not exceed the limitation of buffer area, but increases the distortion after video is rebuild.In the case that other coding parameters all determine,
Quantization parameter value directly determines the video quality of encoded video frame and the size of frame.
In practical application, generalling use the quantization parameter that rate control module obtains current encoded frame.Code rate controls mould
Root tuber (sometimes can also be without reference to decoding buffer zone according to the target bit rate of input and the size of reference decoder buffer area
Limitation), export the quantization parameter of current frame to be encoded.
Step 103, complexity and the first quantization parameter according to above-mentioned I frame, whether the size after estimating I frame coding
More than preset threshold.
Specifically, when using SAD characterization complexity, in above-mentioned steps, then quantified according to the SAD of I frame and first
Parameter, whether the size after estimation I frame encodes is more than preset threshold.
Preferably, a certain number of samples can be trained using the method for support vector machines in advance, determination is used for
Judge I frame sign whether be more than preset threshold kernel function.For example, acquiring a large amount of I frame coded data, comprising: I frame it is big
Then small, I frame complexity, quantization parameter are trained the data of acquisition using the method for support vector machines, wherein core
Function is using linear kernel function, as shown in formula (2):
Svm_res=qp_w*qp_scale* (qp+qp_shift)+sr_w*sr_scale* (sad+sr_shift)+
bias (2)
Wherein, sad indicates absolute error and qp indicates quantization parameter, qp_w, qp_scale, qp_shift, sr_w, sr_
Scale, sr_shift, bias indicate empirical coefficient.
By training, the empirical coefficient value of the kernel function as shown in formula (2) can be determined.It is determining such as formula (2)
Shown in whether be greater than the classifier of preset threshold after kernel function to the I frame sign after coding.
Specifically, in above-mentioned steps 103, the SAD of above-mentioned I frame and the first quantization parameter are substituted into formula (2), if Svm_
Res > 0, then it is assumed that I frame sign after coding can be more than preset threshold, otherwise it is assumed that the I frame sign after coding do not exceed it is pre-
If threshold value.
Optionally, preset threshold can be determined according to network transfer speeds and the maximum value of network transport latency.?
In monitoring system, the code stream that usual front-end camera (including encoder) generates needs to be transmitted through the network to rear end i.e. receiving end
(such as network storage equipment), due to using network transmission, receiving end needs to consider the factor of network delay.It is assumed that receiving end is set
It (is more than to receive not yet completely this time that the upper limit value for the every frame video code flow network transport latency set, which is k seconds,
One frame video code flow then treats as abnormality processing, such as loss of data) because this time upper limit value needs to consider delay, usually
It cannot be arranged too big.If video requency frame data is larger, network transmission time-consuming is more than the upper limit k seconds that network generates the waiting time, then recognizes
It is abnormal for the video requency frame data network transmission.Assuming that the size of video frame be M bits, network transfer speeds vbits/s, then
The video frame network transmission needs time-consuming M/v seconds.If k < M/v, the network latency needed is more than network transport latency
Upper limit value, will appear handle correct data extremely as network transmission at this time.Since the embodiment of the present invention passes through control
The method of I frame sign processed solves the above problems, and therefore, it is necessary to enable M≤v*k.It is alternatively possible to by the preset threshold of I frame sign
Network transfer speeds are set as multiplied by network transport latency (v*k) bits.
Due to I frame data be much larger than other frames data, can the size of data only to I frame estimated, controlled
System, certain embodiment of the present invention are not limited to this, can also be based on the technical concept similar with the embodiment of the present invention, to other views
Frequency frame is estimated, is controlled.
If step 104 estimates that the size after above-mentioned I frame coding is more than preset threshold, it is determined that the second quantization parameter.
In above-mentioned steps, the second quantization parameter determined enables to the I after being encoded according to the quantization parameter
Frame sign is less than or equal to preset threshold.
Still by taking the above-mentioned linear kernel function determined as an example, size after estimating above-mentioned I frame coding is more than preset threshold,
That is when Svm_res > 0, the Svm_res=0 in formula (2) can be enabled, available:
Qp=- ((sr_w*sr_scale* (sad+sr_shift))+bias)/(qp_w*qp_scale)-qp_shift
(3)
Enable fixed_x1=- ((sr_w*sr_scale*sr_shift)+bias)/(qp_w*qp_scale), x2=-
(sr_w*sr_scale)/(qp_w*qp_scale), then available:
Qp=x2*sad+fixed_x1-qp_shift (4)
According to the quantization parameter that formula (4) is determined, the second quantization parameter can be used as, be used for subsequent cataloged procedure,
So that the size of the I frame of next code is less than or equal to preset threshold.But the second quantization parameter is not limited to be counted according to formula (4)
The numerical value of calculating is also possible to other values that can satisfy Svm_res≤0；Alternatively, if using other in above-mentioned steps 103
Algorithm estimates I frame sign, then can also be accordingly using other calculations when determining the second quantization parameter at step 104
Method.
Step 105 encodes above-mentioned I frame according to the second quantization parameter.
Wherein, above-mentioned I frame is encoded according to the second quantization parameter, the size of the I frame after enabling to coding is less than or equal to pre-
If threshold value.
Optionally, it if being to be less than preset threshold to the estimated result of I frame sign, is encoded still according to the first quantization parameter
The I frame.
Above-described embodiment for a clearer understanding of the present invention, it is above-mentioned to the present invention below with a specific embodiment
The specific implementation process of embodiment is described, and detailed process is as shown in Figure 2.
Assuming that there are linear relationship, the linear relationship such as aforementioned formula (1) institutes between the SAD of I frame and the SAD of former frame
It states.According to collected a large amount of I sample, linear fit is carried out, determines empirical coefficient a and b.In a specific embodiment
In, the empirical coefficient determined is a=1, b=1, formula (5) can be obtained:
SADcur=SADpre (5)
Above-mentioned formula indicates that the SAD of current I frame is equal with the SAD of former frame.
The preset threshold of the I frame sign determined according to network transfer speeds and network transport latency is
300kbits.Then it according to the preset threshold, is trained using a large amount of I frame samples of the support vector machines to acquisition, wherein adopt
Collection I frame coded data includes: the size of I frame, the SAD of I frame, quantization parameter.I frame using size greater than 300kbits is as positive sample
This, i.e. Svm_res=1 in formula (2), using the I frame less than or equal to 300kbits as negative sample, i.e., in formula (2)
Svm_res=0, to determine the empirical coefficient in formula (2).In a specific embodiment, the empirical coefficient determined
For sr_w=-5.5082, sr_shift=-0.0804, sr_scale=19.6308, bias=9.5505, qp_w=
Formula formula (6) can be obtained in 8.6304, qp_shift=-0.2903, qp_scale=14.5165:
Svm_res=125.2832016* (qp-0.2903)+108.13037256* (sad-0.0804)+9.5505
(6)
When estimating current I frame SAD to be encoded, by the SAD of the former frame of the I framepreIt substitutes into formula (5), obtains
To the SAD of the I framecur.Then by the SAD of the I framecurFormula (6) are substituted into the first quantization parameter qp_1 for being currently used in coding,
Svm_res is calculated.If Svm_res=0, then it is assumed that I frame size after coding does not exceed 300kbits, therefore,
It is encoded according to the first quantization parameter qp_1；If Svm_res=1, then it is assumed that the I frame by coding after size can be more than
300kbits, at this point it is possible to enable the part of formula right side of the equal sign be equal to 0, then by the SAD of the I framecurIt substitutes into, it is counter to solve qp,
Then as the second quantization parameter qp_2 is encoded according to the second quantization parameter qp_2.
In the above embodiment of the present invention, the complexity of I frame to be encoded is estimated, and obtain for coding the
One quantization parameter, according to complexity and the first quantization parameter, whether the size after estimating I frame coding is more than preset threshold, if
Estimated result is more than preset threshold, it is determined that the second quantization parameter is encoded according to the second quantization parameter, so that coding
I frame sign afterwards be less than or equal to preset threshold, to avoid I frame it is excessive caused by abnormal problem, and then influence video quality.
Based on the same technical idea, the embodiment of the invention provides a kind of I frame sign control devices, for realizing above-mentioned
Embodiment of the method, as described in Figure 3, which includes:
First estimation module 301 estimates the complexity of I frame to be encoded for the complexity according to encoded frame
Meter；
Module 302 is obtained, for obtaining the first quantization parameter for being used for coding；
Second estimation module 303, for according to the I frame complexity and first quantization parameter, estimate the I
Whether the size after frame coding is more than preset threshold；
Determining module 304, if for estimating that the size after the I frame coding is more than preset threshold, it is determined that the second quantization
Parameter；According to the size for the I frame that second quantization parameter encodes, it is less than or equal to preset threshold；
Coding module 305, for encoding the I frame according to second quantization parameter.
Optionally, the first estimation module 301, is specifically used for:
According to the former frame of I frame to be encoded or the complexity of preceding multiframe, the complexity of I frame to be encoded is estimated
Meter.
Optionally, the first estimation module 301, is specifically used for:
And, absolute error to I frame to be encoded and estimated according to the absolute error of encoded frame；
Second estimation module, is specifically used for:
According to the absolute error of the I frame and and first quantization parameter, the size after estimating I frame coding be
No is more than preset threshold.
Optionally, coding module 305 is also used to:
If estimating, the size of the I frame is less than preset threshold, encodes the I frame according to first quantization parameter.
Optionally, the preset threshold of I frame sign, the maximum value according to network transfer speeds and network transport latency are true
It is fixed.
In the above embodiment of the present invention, the complexity of I frame to be encoded is estimated, and obtain for coding the
One quantization parameter, according to complexity and the first quantization parameter, whether the size after estimating I frame coding is more than preset threshold, if
Estimated result is more than preset threshold, it is determined that the second quantization parameter is encoded according to the second quantization parameter, so that coding
I frame sign afterwards be less than or equal to preset threshold, to avoid I frame it is excessive caused by abnormal problem, and then influence video quality.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (8)
1. a kind of key frame sign control method characterized by comprising
According to the complexity of encoded frame, the complexity of key frame to be encoded is estimated；
Obtain the first quantization parameter for coding；
According to the complexity of the key frame and first quantization parameter, whether the size after estimating the key frame coding
More than preset threshold；
If estimating, the size after the key frame coding is more than preset threshold, it is determined that the second quantization parameter；According to described second
The size for the key frame that quantization parameter encodes is less than or equal to preset threshold；
The key frame is encoded according to second quantization parameter；
The complexity according to encoded frame, estimates the complexity of key frame to be encoded, comprising:
According to the former frame of key frame to be encoded or the complexity of preceding multiframe, the complexity of key frame to be encoded is estimated
Meter；Or according to the absolute error of encoded frame and, absolute error to key frame to be encoded and estimate.
2. the method as described in claim 1, which is characterized in that
The complexity according to the key frame and first quantization parameter, the size after estimating the key frame coding
It whether is more than preset threshold, comprising:
According to the absolute error of the key frame and and first quantization parameter, size after estimating key frame coding
It whether is more than preset threshold.
3. the method as described in claim 1, which is characterized in that further include:
If estimating, the size of the key frame is less than preset threshold, encodes the key according to first quantization parameter
Frame.
4. the method as described in claim 1, which is characterized in that the preset threshold of the key frame sign, according to network transmission
Speed and the maximum value of network transport latency determine.
5. a kind of key frame sign control device characterized by comprising
First estimation module estimates the complexity of key frame to be encoded for the complexity according to encoded frame；
Module is obtained, for obtaining the first quantization parameter for being used for coding；
Second estimation module, for according to the key frame complexity and first quantization parameter, estimate the key
Whether the size after frame coding is more than preset threshold；
Determining module, if for estimating that the size after the key frame coding is more than preset threshold, it is determined that the second quantization parameter；
According to the size for the key frame that second quantization parameter encodes, it is less than or equal to preset threshold；
Coding module, for encoding the key frame according to second quantization parameter；
First estimation module, is specifically used for:
According to the former frame of key frame to be encoded or the complexity of preceding multiframe, the complexity of key frame to be encoded is estimated
Meter；Or according to the absolute error of encoded frame and, absolute error to key frame to be encoded and estimate.
6. device as claimed in claim 5, which is characterized in that
Second estimation module, is specifically used for:
According to the absolute error of the key frame and and first quantization parameter, size after estimating key frame coding
It whether is more than preset threshold.
7. device as claimed in claim 5, which is characterized in that the coding module is also used to:
If estimating, the size of the key frame is less than preset threshold, encodes the key according to first quantization parameter
Frame.
8. device as claimed in claim 5, which is characterized in that the preset threshold of the key frame sign, according to network transmission
Speed and the maximum value of network transport latency determine.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610917915.8A CN106572352B (en) | 2016-10-21 | 2016-10-21 | A kind of key frame sign control method and device |
| EP17862412.8A EP3513563A4 (en) | 2016-10-18 | 2017-10-17 | Methods and systems for video processing |
| PCT/CN2017/106484 WO2018072675A1 (en) | 2016-10-18 | 2017-10-17 | Methods and systems for video processing |
| US16/387,506 US10977498B2 (en) | 2016-10-18 | 2019-04-17 | Methods and systems for video processing |
| US17/198,177 US11527068B2 (en) | 2016-10-18 | 2021-03-10 | Methods and systems for video processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610917915.8A CN106572352B (en) | 2016-10-21 | 2016-10-21 | A kind of key frame sign control method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106572352A CN106572352A (en) | 2017-04-19 |
| CN106572352B true CN106572352B (en) | 2019-09-17 |
Family
ID=58533182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610917915.8A Active CN106572352B (en) | 2016-10-18 | 2016-10-21 | A kind of key frame sign control method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106572352B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3513563A4 (en) | 2016-10-18 | 2019-07-24 | Zhejiang Dahua Technology Co., Ltd | Methods and systems for video processing |
| CN110662044B (en) * | 2019-10-22 | 2022-02-18 | 浙江大华技术股份有限公司 | Video coding method, video coding device and computer storage medium |
| CN111787327B (en) * | 2020-07-01 | 2022-08-02 | 苏州智感电子科技有限公司 | Code stream smoothing control method and system |
| CN113422958B (en) * | 2021-05-31 | 2022-11-08 | 珠海全志科技股份有限公司 | Method, system and medium for controlling size of video coding frame layer code stream |
| CN113660487B (en) * | 2021-07-02 | 2024-03-19 | 珠海全志科技股份有限公司 | Parameter determination method and device for distributing corresponding bit number for frame image |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1909662A (en) * | 2006-08-07 | 2007-02-07 | 浙江大学 | Video compression code ratio control method using uneven distribution of frame target bit number |
| CN101325711A (en) * | 2008-07-16 | 2008-12-17 | 上海大学 | Method for controlling self-adaption code rate based on space-time shielding effect |
| CN101895759A (en) * | 2010-07-28 | 2010-11-24 | 南京信息工程大学 | H.264 code rate control method |
| CN104159109A (en) * | 2014-05-28 | 2014-11-19 | 百视通网络电视技术发展有限责任公司 | Bit rate control method and system based on VBR video encoding |
| CN105376568A (en) * | 2015-12-22 | 2016-03-02 | 广州通达汽车电气股份有限公司 | Optimization method of ABR video coding code rate control |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3024314B1 (en) * | 2014-07-25 | 2017-12-08 | Allegro Dvt | LOW ENCODED VIDEO ENCODER |
-
2016
- 2016-10-21 CN CN201610917915.8A patent/CN106572352B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1909662A (en) * | 2006-08-07 | 2007-02-07 | 浙江大学 | Video compression code ratio control method using uneven distribution of frame target bit number |
| CN101325711A (en) * | 2008-07-16 | 2008-12-17 | 上海大学 | Method for controlling self-adaption code rate based on space-time shielding effect |
| CN101895759A (en) * | 2010-07-28 | 2010-11-24 | 南京信息工程大学 | H.264 code rate control method |
| CN104159109A (en) * | 2014-05-28 | 2014-11-19 | 百视通网络电视技术发展有限责任公司 | Bit rate control method and system based on VBR video encoding |
| CN105376568A (en) * | 2015-12-22 | 2016-03-02 | 广州通达汽车电气股份有限公司 | Optimization method of ABR video coding code rate control |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106572352A (en) | 2017-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106572352B (en) | A kind of key frame sign control method and device | |
| CN109862359A (en) | Bit rate control method, device and electronic equipment based on hierarchical B-frame | |
| CN104301724B (en) | Method for processing video frequency, encoding device and decoding device | |
| CN108293130A (en) | Pass through the device and method of the coding and decoding video of intra prediction | |
| CN107872669B (en) | Video code rate treating method and apparatus | |
| CN110876060B (en) | Code rate adjusting method and device in coding process | |
| CA2972989C (en) | A method of encoding video with film grain | |
| JP4308227B2 (en) | Video quality estimation device, video quality management device, video quality estimation method, video quality management method, and program | |
| TW201306601A (en) | Frame encoding selection based on frame similarities and visual quality and interests | |
| CN114051139B (en) | Video coding method and device | |
| CN109660801A (en) | The method for video coding that quantization parameter is limited | |
| CN109618159A (en) | A kind of self-adaptive encoding method based on resolution ratio corresponding relationship | |
| EP3510773B1 (en) | Quantisation parameter determination and layered coding | |
| US9635362B2 (en) | System and method for the dynamic reduction of the entropy of a signal upstream to a data compression device | |
| CN101389012B (en) | Method and device for rate distortion rate control | |
| CN105744270B (en) | A kind of method for video coding and device with holder | |
| CN109803146A (en) | The second-compressed method and apparatus of video | |
| CN110855908B (en) | Multi-party video screen mixing method and device, network equipment and storage medium | |
| CN106888374B (en) | A kind of 3 d video encoding method, apparatus and video processing equipment | |
| CN111050169B (en) | Method and device for generating quantization parameter in image coding and terminal | |
| Barannik et al. | A method to control bit rate while compressing predicted frames | |
| CN105979261B (en) | A kind of selection method and device of intra prediction mode | |
| CN105704446B (en) | A kind of method and device of multiwindow video switching | |
| CN106937168B (en) | Video coding method, electronic equipment and system using long-term reference frame | |
| WO2017105391A1 (en) | A method to encode video with close multiple scene changes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |