CN106060564B - Inter-frame predicated reference pixel point filtering control method, device and encoder - Google Patents
Inter-frame predicated reference pixel point filtering control method, device and encoder Download PDFInfo
- Publication number
- CN106060564B CN106060564B CN201610430071.4A CN201610430071A CN106060564B CN 106060564 B CN106060564 B CN 106060564B CN 201610430071 A CN201610430071 A CN 201610430071A CN 106060564 B CN106060564 B CN 106060564B
- Authority
- CN
- China
- Prior art keywords
- pixel
- reference pixel
- filtering
- filter
- vegetarian refreshments
- 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
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/593—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving spatial prediction techniques
-
- 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
- H04N19/80—Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
A kind of inter-frame predicated reference pixel point filtering control method, device and encoder, belong to video/image encoding and decoding technique field.When being filtered to reference pixel point each in be predicted piece in frame of reference pixel group, current object reference pixel to be filtered is if not when being the edge reference image vegetarian refreshments in reference pixel group (S202), the pixel difference value (S203) between object reference pixel n reference image vegetarian refreshments adjacent thereto is obtained, the filter of filtering levels corresponding with the pixel difference value is selected to be filtered (S204) to object reference pixel.Namely to each reference image vegetarian refreshments for being not in edge in reference pixel group, the filter of filtering levels is corresponded to according to the local difference characteristic flexible configuration of these reference image vegetarian refreshments, the flexibility of filtering processing, adaptivity and filter effect are more preferable.
Description
Technical field
The invention belongs to video/image encoding and decoding technique fields, and in particular to a kind of inter-frame predicated reference pixel point filtering
Control method, device and encoder.
Background technique
Promotion with people to video/image resolution requirement, video/image content occupy information more and more
Transmission bandwidth and memory capacity.The compression ratio for how further increasing video/image becomes a stern challenge.Especially frame
Interior video/image coding, due to lacking the reference of inter frame image, so that compression efficiency can not be promoted effectively.
Video/image coding removes spatial redundancy information using infra-prediction techniques in frame, before carrying out intra prediction,
The reference pixel point for needing to treat prediction block is filtered to eliminate the alias in reference pixel.In reference image vegetarian refreshments
Ladder will lead to the boundary for occurring apparent directionality in be predicted piece, to influence the efficiency and effect of intra prediction.
In the following ways for frame internal reference pixel at present:
It the use of length is 3 (namely filters of 3 taps), filter factor is the filter of [1/4,2/4,1/4] to reference
Pixel carries out weak filtering, which can only remove lesser ladder and noise in reference pixel；
It is carried out using the pixel value of the most marginal reference image vegetarian refreshments of reference image vegetarian refreshments (namely end edge reference image vegetarian refreshments)
Linear interpolation obtains the pixel value of each reference image vegetarian refreshments, and this mode can generate biggish modification to reference pixel value, so mesh
Preceding this mode is only applicable to the whole very flat situation of reference pixel.
It is to be combined above two mode there are also a kind of mode, according to reference image in be predicted piece of reference pixel group
The overall flat degree of vegetarian refreshments (determines flat journey by reference to the difference between end edge reference image vegetarian refreshments each in pixel group
Degree) it determines using length to be 3, filter factor is [1/4,2/4,1/4] weak filter to the reference pixel in the reference pixel group
Point is filtered, or selection uses linear interpolation filter, regardless of selecting that mode, to reference image after selected
Each reference image vegetarian refreshments is all used uniformly selected filtering mode and completes each reference pixel in filtering namely reference pixel group in plain group
The filtering levels of point are identical.
From above-mentioned analysis it is found that in present frame during video/image coding, in be predicted piece of reference pixel group
The adaptation mechanism of reference image vegetarian refreshments filtering processing is too simple, is used uniformly one kind to reference image vegetarian refreshments each in reference pixel group
Fixed filtering levels are filtered, and lead to the flexibility that frame internal reference pixel is filtered, adaptivity and filtering effect
Fruit is poor.
Summary of the invention
The present invention provides a kind of inter-frame predicated reference pixel point filtering control method, device and encoder, and it is right at present to solve
Each reference image vegetarian refreshments is used uniformly a kind of fixed filtering levels and is filtered in frame internal reference pixel group, causes to reference image vegetarian refreshments
The problem of the flexibility of filtering processing, adaptivity and filter effect difference.
According to the first aspect of the invention, the present invention provides a kind of inter-frame predicated reference pixel point filtering control method,
Include:
In frame in be predicted piece of reference pixel group, current object reference pixel to be filtered is the reference pixel group
In non-edge reference image vegetarian refreshments when, obtain the pixel difference between object reference pixel n reference image vegetarian refreshments adjacent thereto
Different value, the n are more than or equal to 1；Wherein, the edge reference image vegetarian refreshments includes end edge reference image vegetarian refreshments and time edge reference
Pixel, the secondary edge reference pixel are selected as the reference image vegetarian refreshments adjacent with the end edge reference image vegetarian refreshments；
The filter for selecting filtering levels corresponding with the pixel difference value, filters the object reference pixel
Wave.
According to the second aspect of the invention, the present invention also provides a kind of inter-frame predicated reference pixel points to filter control dress
It sets, comprising:
Difference value obtains module, is used in frame in be predicted piece of reference pixel group, current object reference to be filtered
When pixel is the non-edge reference image vegetarian refreshments in the reference pixel group, the object reference pixel n adjacent thereto are obtained
Pixel difference value between reference image vegetarian refreshments, the n are more than or equal to 1；Wherein, the edge reference image vegetarian refreshments includes end edge
Reference image vegetarian refreshments and time edge reference pixel point, the secondary edge reference pixel, which is selected, is and the end edge reference image vegetarian refreshments phase
Adjacent reference image vegetarian refreshments；
Control module is filtered, for selecting the filter of filtering levels corresponding with the pixel difference value, to the target
Reference pixel point is filtered.
According to the third aspect of the invention we, the present invention also provides a kind of encoders, including intra prediction as described above
Reference image vegetarian refreshments filters control device.
Beneficial effect
Inter-frame predicated reference pixel point filtering control method, device and encoder provided by the invention, to be predicted in frame
When each reference pixel point is filtered in the reference pixel group of block, current object reference pixel to be filtered is if not be
When edge reference image vegetarian refreshments in reference pixel group, obtain between object reference pixel n reference image vegetarian refreshments adjacent thereto
Pixel difference value (namely the local difference characteristic for obtaining the object reference pixel itself), the pixel for then selecting and obtaining
Difference value corresponds to the filter of filtering levels, is filtered to object reference pixel.Namely the present invention can be to reference pixel
It is not in each reference image vegetarian refreshments at edge in group, is filtered according to the local difference characteristic flexible configuration of these reference image vegetarian refreshments is corresponding
The filter of grade, rather than be used uniformly a kind of filter of fixed filtering levels, therefore the flexibility, adaptive being filtered
Answering property is more preferable, and filter effect is also more preferable.
Detailed description of the invention
Fig. 1 is to be predicted piece in the frame in the embodiment of the present invention one and reference pixel group schematic diagram；
Fig. 2 is the inter-frame predicated reference pixel point filtering control method flow diagram in the embodiment of the present invention one；
Fig. 3 is the flow diagram of the edge reference image vegetarian refreshments filtering control processing in the embodiment of the present invention one；
Fig. 4 is that schematic diagram is arranged in the pixel difference threshold value in the embodiment of the present invention one；
Fig. 5 is the coder structure schematic diagram in the embodiment of the present invention two；
Fig. 6 is that the inter-frame predicated reference pixel point in the embodiment of the present invention two filters controling device structure diagram；
Fig. 7 is the inter-frame predicated reference pixel point filtering control method flow diagram in the embodiment of the present invention two.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is a part of the embodiment in the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment one
It should be noted that inter-frame predicated reference pixel point filtering control method, device and encoder provided by the invention,
It can be applied to image intraframe coding, also can be applied to intra coding.
To facilitate the understanding of the present invention, the present embodiment combination Fig. 1 to the present invention relates to some concepts carry out example say
It is bright.
In video/image coding, video/image is often divided into I picture and two kinds of inter frame image.Wherein, figure in frame
The information that image itself offer is used only in the coding of picture carries out prediction spatially, its encoding and decoding are independent of other images；
And what the coding of inter frame image to be eliminated is the redundancy in time-domain, its encoding and decoding may rely on one before it
A or multiple images.
It can be multiple initial data according to certain regular partition by I picture when progress I picture is encoded
Block, such as it is divided into the original data block of m*m, an original data block is just one to be predicted piece.For one to be predicted piece
One group of reference pixel group is set.It is shown in Figure 1.Matrix-block shown in dotted line is one to be predicted piece in Fig. 1, at this to be predicted piece
Each reference image vegetarian refreshments in top and left side solid box forms to be predicted piece of the reference pixel group, wherein A, B, C, D,
E ..., R is the pixel value of each pixel.Reference pixel group includes edge reference image vegetarian refreshments in the present embodiment, and wherein edge is joined
Examine pixel again and may include end edge reference image vegetarian refreshments and time edge reference pixel point, wherein secondary edge reference pixel point be with
The adjacent reference image vegetarian refreshments of end edge reference image vegetarian refreshments.In reference pixel group shown in FIG. 1, three of pixel value A, I and R
Reference image vegetarian refreshments is end edge reference image vegetarian refreshments, because in these pixels not adjacent reference pixel in one direction
Point；And four reference image vegetarian refreshments that pixel value is B, H, J, Q are time edge reference pixel point.
It should be understood that division for be predicted piece in frame image and be each to be predicted piece of setting reference pixel group
Concrete mode and non-present invention concern emphasis.Division and each to be predicted piece reference pixel of the present invention for be predicted piece
The no any restrictions of setting of group, and to be predicted piece shown in FIG. 1 and reference pixel group again are just for being easy to understand this hair
Bright one kind illustrates.
It is shown in Figure 2, inter-frame predicated reference pixel point filtering control method provided in this embodiment the following steps are included:
S201: in getting frame in be predicted piece of reference pixel group, current object reference pixel to be filtered.
S202: judge whether the object reference pixel is edge reference image vegetarian refreshments in reference pixel group；If not, going to
S203；Otherwise, S205 is gone to.
In the step, the judgment rule that edge pixel is selected can be advised according to the storage of reference image vegetarian refreshments each in reference pixel group
Then, or further combined with to be predicted piece of latitude m judged.For example, can when each reference image vegetarian refreshments stores in reference pixel group
Sequentially match subscripting with corresponding, can be judged according to the subscript combination m of each target pixel points.
S203: the pixel difference value between object reference pixel n reference image vegetarian refreshments adjacent thereto is obtained, wherein n
More than or equal to 1.
S204: the filter of selection filtering levels corresponding with pixel difference value obtained in S203, to object reference pixel
Point is filtered.Namely the present embodiment can join each reference image vegetarian refreshments that edge is not in reference pixel group according to these
The local difference characteristic flexible configuration for examining pixel corresponds to the filter of filtering levels, rather than is used uniformly a kind of fixed filtering
The filter of grade, therefore the flexibility that is filtered, adaptivity are more preferable, and filter effect is also more preferable.
S205: the object reference pixel is handled according to edge reference image vegetarian refreshments filtering processing rule.
In S203, the value of n can be according to practical application request flexible choice, such as can be set to 1, then optional at this time
Select the reference image calculated on object reference pixel any 1 reference image vegetarian refreshments or assigned direction adjacent thereto adjacent thereto
The pixel difference value of vegetarian refreshments.It is preferred that the value of n is even number, such as 2 or 4, with calculate object reference pixel and its left and right (or
The pixel difference value of 2 adjacent reference image vegetarian refreshments or 4 reference image vegetarian refreshments up and down).
In the step, the pixel difference value obtained between object reference pixel n reference image vegetarian refreshments adjacent thereto can be with
Using following calculation:
The sum of the pixel value of n pixel h1 is obtained, and obtains the pixel value of object reference pixel and the product h2 of n；
Using h1 and the absolute value Diffy of h2 difference as pixel difference value.
For example, it is assumed that the object reference pixel of current processing to be filtered is the pixel that pixel value is N in Fig. 1.
When n takes 1, and taking mutually is pixel that pixel value is M with reference to pixel, at this time:
Diffy=abs (h1-h2)=abs (M-N).
When n takes 2, and taking be mutually pixel value with reference to pixel is M and the pixel of P, at this time:
Diffy=abs (h1-h2)=abs (M+P-2*N).
When n takes 4, and taking mutually is pixel that pixel value is L, M and P, Q with reference to pixel, at this time:
Diffy=abs (h1-h2)=abs (L+M+P+Q-4*N).
When n takes other values and so on, details are not described herein again.
In S204, select the filter of filtering levels corresponding with pixel difference value that can select using following rule:
Pixel difference value is less than when presetting weak rank pixel difference threshold value, and showing the pixel at this time, there is only weaker ladders
Effect selects the first filtering levels filter；The length of first filtering levels filter is equal to 3, is mainly used for removing reference image
Lesser ladder and noise in element, the present embodiment are properly termed as weak filtering levels.
Pixel difference value is greater than when presetting strong rank pixel difference threshold value, shows that the pixel is exactly nearby necessary being at this time
Boundary, therefore also select the first filtering levels filter；The length of first filtering levels filter is equal to 3；
Pixel difference value, which is more than or equal to, presets weak rank pixel difference threshold value, less than or equal to presetting strong rank pixel difference threshold value
When, showing the pixel at this time, there are stronger alias, and the pixel is not near real border, select second
Filtering levels filter；The length of second filtering levels filter is more than or equal to 5；Than the filtering etc. of the first filtering levels filter
Grade is strong, and strong filtering levels are properly termed as in corresponding the present embodiment.
That is, the present embodiment can be in certain journey by preset weak rank pixel difference threshold value and strong rank pixel difference threshold value
Alias is divided into weak staircase areas, strong staircase areas and real border region shown in Fig. 4 on degree.It is each for falling in
The reference pixel point in region selects the filter of corresponding filtering levels according to above-mentioned rule.
It should be understood that the present embodiment can also according to actual needs, by the weak rank pixel difference that multiple grades are arranged
Weak staircase areas and strong staircase areas are further carried out the subdivision of multiple grades by threshold value or strong rank pixel difference threshold value, and right
The filter of multiple filtering levels should be matched.Details are not described herein.
The length of the first filtering levels filter is equal to 3 in the present embodiment.But it is to be understood that the first filtering levels are filtered
The length of wave device can need flexibly setting according to concrete application scene, such as flexible according to factors such as to be predicted piece of latitude m
Selection.And the filter factor of the first filtering levels filter can also flexibly be set according to demand in the present embodiment, such as can be with
It is set as [1/4,2/4,1/4], in another example can be adjusted flexibly according to actual needs as [1/6,2/6,1/6] or other values.
The length of the second filtering levels filter can also be flexible according to factors such as to be predicted piece of latitude m in the present embodiment
Selection.Such as it can be set to 5,7 or 9 etc..Example is carried out so that the length of the second filtering levels filter is equal to 5 as an example below to say
It is bright.The filter coefficient of the second filtering levels filter can be set to [2/16,3/16,6/16,3/16,2/16] at this time；But
Its same filter coefficient can be adjusted flexibly, such as be set as [2/18,3/18,6/18,3/18,2/18].
Since one direction of end edge reference image vegetarian refreshments in edge reference image vegetarian refreshments does not have adjacent reference image vegetarian refreshments,
And secondary edge reference pixel is selected in one direction and only has this pixel of end edge reference image vegetarian refreshments adjacent thereto.Cause
This, when the present embodiment is for object reference pixel non-edge reference image vegetarian refreshments, according to filtering processing rule progress shown in Fig. 3
Processing.
S301: whether object reference pixel is end edge reference image vegetarian refreshments in edge reference image vegetarian refreshments, if so, turning
To S302；Otherwise, S303 is gone to；
S302: the object reference pixel is not filtered.
S303: the filter for directly selecting default filtering levels for the object reference pixel is filtered it.
In S303 preset filtering levels filter be preferably weak filtering levels filter, with remove in reference pixel compared with
Small ladder and noise, the filter without using strong filtering levels rashly.The filter of weak filtering levels can in the present embodiment
Using above-mentioned first filtering levels filter.
The present embodiment uses the pixel difference of reference image vegetarian refreshments reference image vegetarian refreshments adjacent thereto during intra-coding prediction
This different local difference characteristic distinguishes real border, strong ladder and weak ladder, realizes that the different filtering of adaptive selection is strong
The filter of degree grade is filtered reference pixel point.
The present embodiment introduces the filter that filter length is 5 or more as strong filter, Ke Yiyou in intra prediction
The effect ground removal biggish ladder of amplitude.
The filtering mechanism for the local auto-adaptive that the present embodiment uses increases the flexibility of filtering, to non-edge reference image
Each reference image vegetarian refreshments of vegetarian refreshments carries out the calculating of local diversity factor, and to the selection of each pixel, more preferably filter is filtered
Wave.
Embodiment two
Present embodiments provide a kind of encoder, which can be used for the coding of video/image, also can for video/
Image encoder, it is shown in Figure 5 comprising inter-frame predicated reference pixel point filters control device 5.Wherein, intra prediction is joined
It is shown in Figure 6 to examine pixel filtering control device, comprising:
Judgment module 51 is used in getting frame in be predicted piece of reference pixel group, current object reference picture to be filtered
Vegetarian refreshments, and judge whether the object reference pixel is edge reference image vegetarian refreshments in reference pixel group.
Difference value obtains module 52, in be predicted piece of reference pixel group, current target to be filtered to be joined in frame
When to examine pixel not be the edge reference image vegetarian refreshments in reference pixel group, object reference pixel n ginseng adjacent thereto is obtained
The pixel difference value between pixel is examined, n is more than or equal to 1；
Control module 53 is filtered, for select filtering levels corresponding with the difference value obtained pixel difference value of acquisition module 52
Filter, object reference pixel is filtered.
Filtering control module 53 is specifically used for when pixel difference value is less than and presets weak rank pixel difference threshold value or pixel difference
Different value selects the first filtering levels filter greater than when presetting strong rank pixel difference threshold value；The length of first filtering levels filter
Degree is equal to 3；
It is more than or equal in pixel difference value and presets weak rank pixel difference threshold value, less than or equal to presets strong rank pixel difference threshold value
When, select the second filtering levels filter；The length of second filtering levels filter is more than or equal to 5.
The mode of the specific choice filter of control module 53 is filtered referring to shown in embodiment one, details are not described herein.
In the present embodiment, filtering control module 53 is also used in 51 object reference pixel of judgment module be edge reference image
When vegetarian refreshments, which is handled according to edge reference image vegetarian refreshments filtering processing rule.It specifically includes: filtering
Control module 53 does not do at filtering the object reference pixel when object reference pixel is end edge reference image vegetarian refreshments
Reason.Control module 53 is filtered when object reference pixel is secondary edge reference pixel point, it is direct for the object reference pixel
The filter of default filtering levels is selected to be filtered it.The filter of default filtering levels herein is preferably weak filter
The filter of wave grade to remove lesser ladder and noise in reference pixel, and can directly adopt above-mentioned first filtering levels
Filter.
It should be understood that judgment module 51, filtering control module 53 in the present embodiment, difference value obtain module 52
Above-mentioned function can by encoder controller or processor realize.And judgment module 51, filtering control module 53, difference value
Obtaining module 52 can be configured in controller or processor.
In order to better understand the present invention, the present embodiment with the length of the first filtering levels filter be 3, filter coefficient
For [1/4,2/4,1/4]；The length of second filtering levels filter be 5, filter coefficient be [2/16,3/16,6/16,3/16,
2/16], illustrated for reference pixel group as shown in connection with fig. 1.Filtering control process at this time is shown in Figure 7,
Include:
S701: obtaining object reference pixel currently entered is Y；
S702: judge whether Y is end edge reference image vegetarian refreshments (the corresponding pixel of A, I, R pixel value in Fig. 1), such as
It is to go to S703；Otherwise, S704 is gone to；
S703: without filtering.
S704: judge whether Y is time edge reference pixel point (the corresponding pixel of B, H, J, Q pixel value in Fig. 1)；Such as
It is to go to S709；Otherwise, S705 is gone to；
S705: the local diversity factor Diffy of pixel Y is calculated；
S706: judging whether Diffy is less than weak rank pixel difference threshold value, if so, going to S709；Otherwise, S707 is gone to；
S707: judging whether Diffy is greater than strong rank pixel difference threshold value, if so, going to S709, otherwise, goes to S708；
S708: the second filtering levels filter is selected to be filtered for Y.
Such as assume that Y is the pixel that pixel value N is in Fig. 1, then after being filtered using the second filtering levels filter
Obtained pixel value N ,=(2*L/16+3*M/16+6*N/16+3*P/16+2*Q/16).
Compared to the first filtering levels filter that filter length is 3, the second filtering levels filter in the present embodiment can
To provide bigger filtering strength, the alias between stronger pixel can be removed.And the second filtering levels filter benefit
With 4 or more pixels of current pixel point and surrounding, linear interpolation filter is compared, locality is stronger, it is possible to reduce
Significantly change to reference pixel value.
S709: the first filtering levels filter is selected to be filtered for Y.
Such as assume that Y is the pixel that pixel value N is in Fig. 1, then after being filtered using the first filtering levels filter
Obtained pixel value N ,=(M/4+2*N/4+P/4).
The present embodiment uses the pixel difference of reference image vegetarian refreshments reference image vegetarian refreshments adjacent thereto during intra-coding prediction
This different local difference characteristic distinguishes real border, strong ladder and weak ladder, realizes that the different filtering of adaptive selection is strong
The filter of degree grade is filtered reference pixel point, the flexibility of filtering is increased, to the every of non-edge reference image vegetarian refreshments
A reference image vegetarian refreshments all carries out the calculating of local diversity factor, and to the selection of each pixel, more preferably filter is filtered.
It will be understood by those skilled in the art that all or part of the steps of various methods can pass through in above embodiment
Program is completed to control related hardware, which can be stored in a computer readable storage medium, and storage medium can wrap
It includes: read-only memory, random access memory, disk or CD etc..
The above content is specific embodiment is combined, further detailed description of the invention, and it cannot be said that this hair
Bright specific implementation is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, it is not taking off
Under the premise of from inventive concept of the invention, a number of simple deductions or replacements can also be made.
Claims (10)
1. a kind of inter-frame predicated reference pixel point filtering control method characterized by comprising
In frame in be predicted piece of reference pixel group, current object reference pixel to be filtered is not in the reference pixel group
Edge reference image vegetarian refreshments when, obtain the pixel difference value between object reference pixel n reference image vegetarian refreshments adjacent thereto,
The n is more than or equal to 1；Wherein, the edge reference image vegetarian refreshments includes end edge reference image vegetarian refreshments and time edge reference pixel
Point, the secondary edge reference pixel are selected as the reference image vegetarian refreshments adjacent with the end edge reference image vegetarian refreshments；
The filter for selecting filtering levels corresponding with the pixel difference value, is filtered the object reference pixel.
2. inter-frame predicated reference pixel point filtering control method as described in claim 1, which is characterized in that the object reference
When pixel is the end edge reference image vegetarian refreshments in the reference pixel group, which is not done at filtering
Reason.
3. inter-frame predicated reference pixel point filtering control method as described in claim 1, which is characterized in that obtain the target
Pixel difference value between reference image vegetarian refreshments n reference image vegetarian refreshments adjacent thereto includes:
The sum of the pixel value of n pixel h1 is obtained, and obtains the pixel value of the object reference pixel and the product of n
h2；
It takes the h1 and the absolute value of h2 difference is the pixel difference value.
4. inter-frame predicated reference pixel point filtering control method as claimed in claim 3, which is characterized in that the n is equal to 2.
5. inter-frame predicated reference pixel point filtering control method according to any one of claims 1-4, which is characterized in that selection
The filter of filtering levels corresponding with the pixel difference value includes:
The pixel difference value is less than when presetting weak rank pixel difference threshold value or the pixel difference value is greater than and presets strong rank pixel
When discrepancy threshold, the first filtering levels filter is selected；The length of the first filtering levels filter is equal to 3；
The pixel difference value, which is more than or equal to, presets weak rank pixel difference threshold value, less than or equal to presetting strong rank pixel difference threshold value
When, select the second filtering levels filter；The length of the second filtering levels filter is more than or equal to 5.
6. inter-frame predicated reference pixel point filtering control method as claimed in claim 5, which is characterized in that second filtering
The length of level filter is equal to 5, and filter coefficient is [2/16,3/16,6/16,3/16,2/16].
7. inter-frame predicated reference pixel point filtering control method as claimed in claim 5, which is characterized in that the object reference
When pixel is secondary edge reference pixel point adjacent with end edge reference image vegetarian refreshments in the reference pixel group, first is selected
The filter of filtering levels is filtered it.
8. a kind of inter-frame predicated reference pixel point filters control device characterized by comprising
Difference value obtains module, is used in frame in be predicted piece of reference pixel group, current object reference pixel to be filtered
It selects not when being the edge reference image vegetarian refreshments in the reference pixel group, obtains object reference pixel n reference adjacent thereto
Pixel difference value between pixel, the n are more than or equal to 1；Wherein, the edge reference image vegetarian refreshments is referred to comprising end edge
Pixel and time edge reference pixel point, it is adjacent with the end edge reference image vegetarian refreshments that the secondary edge reference pixel, which is selected,
Reference image vegetarian refreshments；
Control module is filtered, for selecting the filter of filtering levels corresponding with the pixel difference value, to the object reference
Pixel is filtered.
9. inter-frame predicated reference pixel point as claimed in claim 8 filters control device, which is characterized in that the filtering control
Module is used for when the pixel difference value is less than and presets weak rank pixel difference threshold value or the pixel difference value is strong greater than default
When rank pixel difference threshold value, the first filtering levels filter is selected；The length of the first filtering levels filter is equal to 3；
It is more than or equal in the pixel difference value and presets weak rank pixel difference threshold value, less than or equal to presets strong rank pixel difference threshold value
When, select the second filtering levels filter；The length of the second filtering levels filter is more than or equal to 5.
10. a kind of encoder, which is characterized in that filter and control including inter-frame predicated reference pixel point as claimed in claim 8 or 9
Device processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610430071.4A CN106060564B (en) | 2016-06-16 | 2016-06-16 | Inter-frame predicated reference pixel point filtering control method, device and encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610430071.4A CN106060564B (en) | 2016-06-16 | 2016-06-16 | Inter-frame predicated reference pixel point filtering control method, device and encoder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106060564A CN106060564A (en) | 2016-10-26 |
| CN106060564B true CN106060564B (en) | 2019-02-12 |
Family
ID=57168307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610430071.4A Active CN106060564B (en) | 2016-06-16 | 2016-06-16 | Inter-frame predicated reference pixel point filtering control method, device and encoder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106060564B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10425640B2 (en) * | 2016-06-16 | 2019-09-24 | Peking University Shenzhen Graduate School | Method, device, and encoder for controlling filtering of intra-frame prediction reference pixel point |
| GB2564150A (en) * | 2017-07-05 | 2019-01-09 | Sony Corp | Image data encoding and decoding |
| CN107896330B (en) * | 2017-11-29 | 2019-08-13 | 北京大学深圳研究生院 | It is a kind of in frame and the filtering method of inter-prediction |
| KR20210139446A (en) | 2019-03-28 | 2021-11-22 | 후아웨이 테크놀러지 컴퍼니 리미티드 | Method and apparatus for intra-smoothing |
| US11431971B2 (en) * | 2019-06-24 | 2022-08-30 | Industrial Technology Research Institute | Method and image processing apparatus for video coding |
| CN111083474A (en) * | 2019-12-03 | 2020-04-28 | 咪咕文化科技有限公司 | Filtering method for inter-frame prediction, electronic device and computer-readable storage medium |
| CN113891075B (en) * | 2020-07-03 | 2023-02-28 | 杭州海康威视数字技术股份有限公司 | Filtering processing method and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101193288A (en) * | 2006-11-30 | 2008-06-04 | 联合信源数字音视频技术（北京）有限公司 | A pixel loop filtering method and filter |
| CN102685473A (en) * | 2011-03-10 | 2012-09-19 | 华为技术有限公司 | Intra-frame prediction method and device |
| CN103747269A (en) * | 2013-09-30 | 2014-04-23 | 北京大学深圳研究生院 | Filter interpolation method and filter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5818800B2 (en) * | 2009-10-05 | 2015-11-18 | トムソン ライセンシングＴｈｏｍｓｏｎ Ｌｉｃｅｎｓｉｎｇ | Encoding method and decoding method |
-
2016
- 2016-06-16 CN CN201610430071.4A patent/CN106060564B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101193288A (en) * | 2006-11-30 | 2008-06-04 | 联合信源数字音视频技术（北京）有限公司 | A pixel loop filtering method and filter |
| CN102685473A (en) * | 2011-03-10 | 2012-09-19 | 华为技术有限公司 | Intra-frame prediction method and device |
| CN103747269A (en) * | 2013-09-30 | 2014-04-23 | 北京大学深圳研究生院 | Filter interpolation method and filter |
Non-Patent Citations (3)
| Title |
|---|
| "A new frame interpolation method with pixel-level motion vector field";Chuanxin Tang; Ronggang Wang; Wenmin Wang; Wen Gao;《2014 IEEE Visual Communications and Image Processing Conference》;20141231;全文 |
| "Partition-level adaptive interpolation filter for video coding";Ronggang Wang; Yongbing Zhang; Yuan Dong; Haila Wang;《2009 IEEE International Conference on Multimedia and Expo》;20091231;全文 |
| "一种分像素运动补偿插值滤波方法及高效VLSI实现";王荣刚，李锦涛;《中国科学院计算技术研究所第八届计算机科学与技术研究生学术讨论会》;20040701;全文 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106060564A (en) | 2016-10-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106060564B (en) | Inter-frame predicated reference pixel point filtering control method, device and encoder | |
| US11265555B2 (en) | Video encoding and decoding method | |
| US10390021B2 (en) | Method and apparatus of video coding | |
| Li et al. | A convolutional neural network-based approach to rate control in HEVC intra coding | |
| EP3072300B1 (en) | Method and apparatus for encoding and decoding video signal using adaptive sampling | |
| EP3709644A1 (en) | Method for image processing and apparatus for implementing the same | |
| EP3379817B1 (en) | Method for real-time video noise reduction in coding process, terminal, and nonvolatile computer readable storage medium | |
| MX2007011099A (en) | Interpolated frame deblocking operation in frame rate up conversion application. | |
| CN106170093B (en) | Intra-frame prediction performance improving coding method | |
| CN112997500A (en) | Improvements to region-based adaptive loop filters | |
| CN107925761B (en) | Moving picture encoding/decoding device and method, and computer-readable recording medium | |
| US10911785B2 (en) | Intelligent compression of grainy video content | |
| CN102754440B (en) | Method for encoding images, picture coding device and camera system | |
| WO2010121235A1 (en) | System for reducing noise in video processing | |
| CN109151470B (en) | Coding resolution control method and terminal | |
| KR20180017159A (en) | Deblocking filtering method and deblocking filter | |
| JP4380498B2 (en) | Block distortion reduction device | |
| US8131106B2 (en) | Blocking effect removal system and method | |
| US10425640B2 (en) | Method, device, and encoder for controlling filtering of intra-frame prediction reference pixel point | |
| CN106157252B (en) | A kind of image processing method and image processing apparatus | |
| US20140056363A1 (en) | Method and system for deblock filtering coded macroblocks | |
| CN104702954A (en) | Video coding method and device | |
| CN110582022B (en) | Video encoding and decoding method and device and storage medium | |
| CN107547895B (en) | Image processing method and device | |
| US7636493B2 (en) | Filter device, filtering method and filtering program product |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |