CN103841422B - The intra-frame prediction method and device of depth image - Google Patents
The intra-frame prediction method and device of depth image Download PDFInfo
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Abstract
The present invention discloses the intra-frame prediction method and device of a kind of depth image, wherein, methods described includes：According to the intra prediction mode of current image block, it is determined that the prediction block of the current image block corresponding with the intra prediction mode, the prediction block includes first area and second area；Using the value of the sample point where the first position of the prediction block as the pixel of the first area of the prediction block prediction data, the upper left position of the first position including the prediction block；Detect the value of sample point where the predeterminated position in the prediction block, if it is determined that when the value of sample point is unequal with the value of the sample point where the first position where the predeterminated position, then using the value of the sample point where the predeterminated position as the pixel of the second area of the prediction block prediction data.The value of the sample point of whole image block need not be traveled through can just find two values of different sample points, improve encoding-decoding efficiency.
Description
Technical field
The present embodiments relate to technical field of image processing, more particularly to a kind of intra-frame prediction method of depth image and
Device.
Background technology
Include visible image and the two kinds of image of depth image in 3 d video images system, visible image includes image
The information of itself, such as colour information, depth image include the depth information of visible image, such as profile information.To 3 D video figure
In as being transmitted, in order to reduce the bandwidth shared by transmission of video, it is necessary to carry out coded treatment to video image, including to regarding
The coded treatment of image and depth image, to reduce the size of 3 d video images data.
In the prior art, it is first using intra-frame prediction method to the coded treatment of depth image in 3 d video images system
First, image segmentation to be encoded into one or more subimage blocks is obtained the intra prediction mode of current image block, root by coding side
The prediction data of current image block is obtained according to intra prediction mode, wherein, described image block and divide the son that obtains through image block
Image block is commonly known as image block, the prediction data of described image block encoded as current image block or decoding prediction number
According to using, it comes from the pixel data of encoded or decoding adjacent block, or encodes or decode the fixation of systemic presupposition
Value, or the prediction data that other confession current blocks for coming from adjacent block are encoded or decoded.Coding side is to each picture in image block
The pixel value and prediction data of vegetarian refreshments（Or the data of the reference block generated by prediction data）In corresponding each pixel picture
Plain value carries out pointwise and asks difference to obtain residual matrix, residual matrix is quantified, is converted and entropy code, the code that entropy code is obtained
Stream is sent to decoding end.Decoding end reads bit stream from the code stream for obtaining, and obtains corresponding residual by inverse quantization, Gray code
Difference, the prediction data of current image block is obtained according to intra prediction mode, by the residual error of current image block and the picture of prediction data
Element value（Or the pixel value of the reference block generated by prediction data）It is added, obtains the pixel value of current image block.
However, in the prior art, when obtaining the prediction data of image block according to intra prediction mode, it is possible to need traversal
The value of the sample point of whole image block can just find two values of different sample points, and by two values of different sample points
As the prediction data of different zones in the corresponding prediction block of image block, due to needing the sample point of image block of detection more,
Cause encoding-decoding efficiency not high.
The content of the invention
The embodiment of the present invention provides a kind of intra-frame prediction method and device of depth image, is used to solve need in the prior art
The sample point of the image block to be detected is more and causes encoding-decoding efficiency problem not high.
A kind of first aspect, there is provided intra-frame prediction method of depth image, including：
According to the intra prediction mode of current image block, it is determined that the present image corresponding with the intra prediction mode
The prediction block of block, first area and second area that the prediction block includes；
Using the value of the sample point where the first position of the prediction block as the area of the corresponding prediction block of the sample point
The prediction data of the pixel in domain, the region of the corresponding prediction block of the sample point is the first area；
Detect the value of sample point where the predeterminated position in the prediction block, however, it is determined that sample point where the predeterminated position
Value it is unequal with the value of the sample point where the first position when, then the value of the sample point where the predeterminated position is made
It is the prediction data of the pixel of the second area of the prediction block.
Based in a first aspect, in the first possible implementation, detecting sample where the predeterminated position in the prediction block
After the value of this point, also include：
If it is determined that when the value of sample point is equal with the value of the sample point where the first position where the predeterminated position,
The prediction data of the pixel of the second area of the prediction block is then entered as default numerical value.
The first possible implementation based on first aspect or first aspect, in second possible implementation
In, the first position includes the upper left position of the prediction block；The predeterminated position at least includes three positions, respectively
Second, third and the 4th position.
Second possible implementation based on first aspect, in the third possible implementation, however, it is determined that institute
State sample point where predeterminated position value it is unequal with the value of the sample point where the first position when, then by the default position
The value of the sample point where putting is specifically included as the prediction data of the pixel of the second area of the prediction block：
If the value of the value of the sample point where the second place of the prediction block and the sample point where the first position
When unequal, then using the value of the sample point where the second place of the prediction block as the second area of the prediction block picture
The prediction data of vegetarian refreshments, the second place includes the upper right Angle Position of the prediction block；Or
If the value of the sample point where the second Angle Position of the prediction block and the sample point where the first position
When being worth equal, and value and the sample point where the first position of sample point where the 3rd position of the prediction block value
When unequal, then the picture of the second area using the value of the sample point where the 3rd position of the prediction block as the prediction block
The prediction data of vegetarian refreshments, the 3rd position includes the lower-left Angle Position of the prediction block；Or
If the second of the prediction block and the value and the sample where the first position of the 3rd sample point where position
When the value of point is equal, and sample point where the 4th position of the prediction block value and the sample point where the first position
Value it is unequal when, then using the value of the sample point where the 4th position of the prediction block as the prediction block second area
Pixel prediction data, the lower right position of the 4th position including the prediction block.
Second possible implementation based on first aspect, it is described default in the 4th kind of possible implementation
Position also includes the 5th position, and the 5th position includes the centre position of the prediction block.
The 4th kind of possible implementation based on first aspect, in the 5th kind of possible implementation, however, it is determined that institute
State sample point where predeterminated position value it is unequal with the value of the sample point where the first position when, then by the default position
The value of the sample point where putting specifically also includes as the prediction data of the pixel of the second area of the prediction block：
If the value of the sample point where second, third and the 4th position of the prediction block with where the first position
When the value of sample point is equal, and sample point where the 5th position of the prediction block value and the sample where the first position
When the value of this point is unequal, then using the value of the sample point where the 5th position of the prediction block as the second of the prediction block
The prediction data of the pixel in region.
The 4th kind of possible implementation based on first aspect, in the 6th kind of possible implementation, if described pre-
Survey block second, third, the 4th and the 5th sample point where position value and the sample point where the first position value
When equal, then the prediction data of the pixel of the second area of the prediction block is entered as default numerical value.
Based on first aspect first or the 6th kind of possible implementation, in the 7th kind of possible implementation, institute
Stating numerical value includes 2(n-1), wherein, n is the accuracy value of sample point.
The first possible implementation based on first aspect or first aspect, in the 8th kind of possible implementation
In, also include：Prediction data according to the first area and the pixel of second area is performed the encoding operation.
The 8th kind of possible implementation based on first aspect, in the 9th kind of possible implementation, also includes：Root
Decoding operate is carried out according to the prediction data of the first area and the pixel of second area.
A kind of second aspect, there is provided the infra-frame prediction device of depth image, including:
Determining module, for the intra prediction mode according to current image block, it is determined that corresponding with the intra prediction mode
The current image block prediction block, the prediction block include first area and second area；
Prediction module, for corresponding using the value of the sample point where the first position of the prediction block as the sample point
Prediction block region pixel prediction data, the region of the corresponding prediction block of the sample point is the first area；
The determining module, is additionally operable to detect the value of sample point where the predeterminated position in the prediction block, it is determined that described
Whether the value of sample point is unequal with the value of the sample point where the first position where predeterminated position；
The prediction module, be additionally operable to where the determining module determines the predeterminated position value of sample point with it is described
When the value of the sample point where first position is unequal, using the value of the sample point where the predeterminated position as the prediction block
Second area pixel prediction data.
Based on second aspect, in the first implementation, the prediction module is additionally operable to determine in the determining module
When the value of sample point is equal with the value of the sample point where the first position where the predeterminated position, by the prediction block
The prediction data of the pixel of second area is entered as default numerical value.
The first implementation based on second aspect or second aspect, in second implementation, described first
Put the upper left position including the prediction block；The predeterminated position at least includes three positions, respectively second, third and the
Four positions.
Second implementation based on second aspect, in the third implementation, the prediction module specifically for：
In the value and the sample where the first position of the sample point where the second place that the determining module determines the prediction block
When the value of this point is unequal, using the value of the sample point where the second place of the prediction block as the secondth area of the prediction block
The prediction data of the pixel in domain, the second place includes the upper right Angle Position of the prediction block；Or
The sample point where the second Angle Position that the determining module determines the prediction block value with described first
When the value of the sample point where putting is equal, and sample point where the 3rd position of the prediction block value and the first position
When the value of the sample point at place is unequal, using the value of the sample point where the 3rd position of the prediction block as the prediction block
Second area pixel prediction data, the lower-left Angle Position of the 3rd position including the prediction block；Or
Determine the second of the prediction block and the value and described of the 3rd sample point where position in the determining module
When the value of the sample point where one position is equal, and the sample point where the 4th position of the prediction block value and described first
When the value of the sample point where position is unequal, using the value of the sample point where the 4th position of the prediction block as described pre-
The prediction data of the pixel of the second area of block is surveyed, the 4th position includes the lower right position of the prediction block.
The first implementation based on second aspect or second aspect, in the 4th kind of implementation, the default position
Putting also includes the 5th position, and the 5th position includes the centre position of the prediction block.
The 4th kind of implementation based on second aspect, in the 5th kind of implementation, the prediction module is specifically also used
In：In the value and described of the sample point where second, third and the 4th position that the determining module determines the prediction block
When the value of the sample point where one position is equal, and the sample point where the 5th position of the prediction block value and described first
When the value of the sample point where position is unequal, using the value of the sample point where the 5th position of the prediction block as described pre-
The prediction data of the pixel of the second area of block is surveyed, the 5th position includes the centre position of the prediction block.
The 5th kind of implementation based on second aspect, in the 6th kind of implementation, the prediction module is specifically also used
In：
The determining module determine the prediction block second, third, the 4th and the 5th sample point where position
When value is equal with the value of the sample point where the first position, by the prediction number of the pixel of the second area of the prediction block
According to being entered as default numerical value.
Based on second aspect first or the 6th kind of implementation, in the 7th kind of implementation, the numerical value includes 2(n -1), wherein, n is the accuracy value of sample point.
The first implementation based on second aspect or second aspect, in the 8th kind of implementation, also includes：Coding
Module, for being performed the encoding operation according to the prediction data of the first area and the pixel of second area.
The 8th kind of implementation based on second aspect, in the 9th kind of implementation, also includes：
Decoder module：Prediction data according to the first area and the pixel of second area carries out decoding operate.
The embodiment of the present invention according to the intra prediction mode of current image block, it is determined that corresponding with the intra prediction mode
The prediction block of the current image block, the prediction block includes first area and second area；By first of the prediction block
The value of the sample point where putting as the pixel in the region of the corresponding prediction block of the sample point prediction data, the sample
The region of the corresponding prediction block of point is the first area；If the value of the sample point where the predeterminated position of the prediction block and institute
When the value of the sample point where stating first position is unequal, then the value of the sample point where the predeterminated position of the prediction block is made
It is the prediction data of the pixel of the second area of the prediction block.Therefore, there is no need to travel through the sample point of whole image block
Value, but the value of the sample point of predeterminated position can just find two values of different sample points in detection image block, and by this two
The value of individual different sample point can improve volume respectively as first area in image block and the prediction data of second area
Decoding efficiency.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
A kind of schematic flow sheet of the intra-frame prediction method of depth image that Fig. 1 is provided for one embodiment of the invention；
Fig. 2 is the image block schematic diagram of the depth image of embodiment of the present invention application；
Fig. 3 is the prediction block schematic diagram of the depth image of embodiment of the present invention application；
A kind of schematic flow sheet of the intra-frame prediction method of depth image that Fig. 4 is provided for another embodiment of the present invention；
A kind of structural representation of the infra-frame prediction device of depth image that Fig. 5 is provided for one embodiment of the invention；
A kind of structural representation of the infra-frame prediction device of depth image that Fig. 6 is provided for another embodiment of the present invention.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In three-dimensional video system, depth image includes the depth information of visible image, for example, profile information, depth map
As the characteristics of be most of zone-texture more smooth, generally only contain sharp keen boundary information, depth image in physical boundary
Interior pixel value is relatively simple and is uniformly distributed, it is therefore possible to use the depth coding based on segmentation block（Segment-wise
DC coding, SDC）Technology is carried out according to the mode of depth modelling pattern (Depth modeling mode, DMM) to image block
Coding is decoded, and its basic thought is：First, the intra-frame prediction block of the image block is obtained according to intra prediction mode, secondly, point
The prediction data of pixel that Dao Chu be in prediction block in first area and second area, wherein, each pixel in first area
The prediction data of point is identical, and the prediction data of each pixel in second area is identical；According to the first area
With the prediction data of the pixel in second area, the respectively pixel in first area corresponding with image block and second area
The average pixel value of point asks poor, the residual error of pixel in first area and second area is obtained respectively, afterwards, to firstth area
The residual error of pixel is encoded in domain and second area, therefore, SDC technologies only need to encode or decode the residual of the two regions
Difference, it is not necessary to encode or decode the residual values of all pixels point in two regions, improve at the encoding and decoding of depth image
Reason efficiency.
A kind of schematic flow sheet of the intra-frame prediction method of depth image that Fig. 1 is provided for one embodiment of the invention, such as Fig. 1
It is shown, including：
101st, according to the intra prediction mode of current image block, it is determined that corresponding with the intra prediction mode described current
The prediction block of image block.
Wherein, include before step 101：The intra prediction mode of the current image block of depth image is obtained, for example, right
Depth image carries out coded treatment, and a two field picture generally is divided into one or more regular depth image blocks, by a depth
Image block is divided into one or more image blocks, and the shape of image block can be regular, it is also possible to when it is irregular, image block
Division methods are relevant with the texture information of depth image block, are that most of zone-texture is more put down the characteristics of due to depth image
Sliding, the pixel value in depth image is relatively simple and is uniformly distributed, and image block can for example be entered using DMM4 in the present embodiment
Row is divided.
Fig. 2 is the image block schematic diagram of the depth image of embodiment of the present invention application, as shown in Fig. 2 each grid is represented
One pixel, it is assumed that the size of current image block is multiplied by 8 for 8, i.e., with 64 pixels, the current image block includes two
Region, as shown in Fig. 2 as white portion（First area）And black region（Second area）, two regions generally represent
Two actual objects, or illustrate object and background area.
Wherein, intra prediction mode determines the choosing method of the prediction data of current image block, embodiment of the present invention application
Intra-frame prediction method be DMM4.
For example, when step 101 is implemented, such as the left adjacent column according to current image block is derived with upper adjacent lines
DC0 regions and DC1 regions, dividing mode and DC0 regions and DC1 regions further according to DMM4 construct frame in corresponding with DMM4
Prediction block, corresponding zonings of DMM4 that will be shown in above-mentioned Fig. 2（First area and second area）Fill corresponding DC0 numbers
Value or DC1 numerical value.
Fig. 3 is the prediction block schematic diagram of the depth image of embodiment of the present invention application, as shown in figure 3, depth image is pre-
Survey block is identical with the image block schematic diagram of the depth image shown in Fig. 2, and each grid represents a pixel, the chi of the prediction block
Very little is 8 to be multiplied by 8, i.e., with 64 pixels, the prediction block includes two regions, as shown in figure 3, as DC0 regions（Equivalent to
First area）With DC1 regions（Equivalent to second area）.
102nd, using the value of the sample point where the first position of the prediction block as the corresponding prediction block of the sample point
Region pixel prediction data, the region of the corresponding prediction block of the sample point is the first area.
In the present embodiment, above-mentioned first position includes the upper left position of prediction block.For example, obtaining pre- as shown in Figure 3
The value of block upper left position sample point is surveyed, as shown in figure 3, the region that the sample point where the upper left position of prediction block is located at
The middle first area as the prediction block（DC0 regions）, by the value of the sample point where the upper left position of the prediction block
As the first area of the prediction block（DC0 regions）Pixel prediction data.
In existing SDC technologies, as shown in figure 3, using the value of the sample point where the upper left position of prediction block as
The first area of the prediction block（DC0 regions）Pixel prediction data after, by method from left to right, from top to bottom
Search and first area（DC0 regions）The sample point of different values.As shown in figure 3, because the first row data are DC0, therefore
First line search continues to search for the data of the second row after terminating, the corresponding value of second sample point of the second row as shown in Figure 3 with
The prediction data of the pixel in DC0 regions is different, thus using the corresponding value of second sample point of the second row as shown in Figure 3 as
Second area（DC1 regions）Pixel prediction data.
It follows that the deficiencies in the prior art part is during obtaining two prediction data of the pixel in region
Needing traversal prediction block can just find two sample points of different value.Need to travel through the sample of whole prediction block in extreme circumstances
Point can just find two different sample values as two prediction data of the pixel in region, due to needing the sample point of detection
Number is more, causes encoding-decoding efficiency to reduce.
The value of the sample point where the 103rd, determining the predeterminated position of prediction block whether with the sample point where first position
Value is unequal, and step 104 is performed if unequal, and step 105 is performed if equal.
In the embodiment of the present invention, dividing mode and DC0 regions and DC1 regions according to DMM4 construct corresponding with DMM4
Intra-frame prediction block, because first area and second area would generally connect or can cover an image with the border of image block
A certain size region of block.Therefore, the present invention is only needed to according to pre-defined rule, the sample point of predeterminated position in detection image block
Value can obtain two different sample values respectively as first area and the prediction data of the pixel of second area.
In the present embodiment, predeterminated position at least includes three positions, respectively second, third and the 4th position, such as Fig. 3 institutes
Show, the second place includes the upper right Angle Position of prediction block, the 3rd position includes the lower-left Angle Position of prediction block, and the 4th position includes
The lower right position of prediction block.
104th, using the value of the sample point where predeterminated position as the pixel of the second area of prediction block prediction data.
For example, include when step 104 is implemented：
If the value of the value of the sample point where the second place of the prediction block and the sample point where the first position
When unequal, then using the value of the sample point where the second place of the prediction block as the second area of the prediction block picture
The prediction data of vegetarian refreshments；Or
If the value of the sample point where the second Angle Position of the prediction block and the sample point where the first position
When being worth equal, and value and the sample point where the first position of sample point where the 3rd position of the prediction block value
When unequal, then the picture of the second area using the value of the sample point where the 3rd position of the prediction block as the prediction block
The prediction data of vegetarian refreshments；Or
If the second of the prediction block and the value and the sample where the first position of the 3rd sample point where position
When the value of point is equal, and sample point where the 4th position of the prediction block value and the sample point where the first position
Value it is unequal when, then using the value of the sample point where the 4th position of the prediction block as the prediction block second area
Pixel prediction data.
105th, the prediction data of the pixel of the second area of prediction block is entered as default numerical value.
Wherein, the default numerical value includes 2(n-1), n for sample point accuracy value, for example value be 8 bits, 10 bits,
12 compare top grade.
Explanation is needed further exist for, because above-mentioned first area and second area are possible in one image block of covering
Larger area, therefore above-mentioned predeterminated position can also include the 5th position, as shown in figure 3, the 5th position includes prediction
The mid-point position of block, alternatively, step 104 is implemented also to be included：
If the value of the sample point where second, third and the 4th position of the prediction block with where the first position
When the value of sample point is equal, and sample point where the 5th position of the prediction block value and the sample where the first position
When the value of this point is unequal, then using the value of the sample point where the 5th position of the prediction block as the second of the prediction block
The prediction data of the pixel in region.
Accordingly, step 105 is implemented also includes：
If the prediction block second, third, the 4th and the 5th sample point where position value and the first position
When the value of the sample point at place is equal, then the prediction data of the pixel of the second area of the prediction block is entered as default
Numerical value, the numerical value includes 2(n-1), wherein, n is the accuracy value of sample point, and such as value is 8 bits, 10 bits, 12 compares top grade.
Further, in the present embodiment coding side always according to the first area and the prediction number of the pixel of second area
According to performing the encoding operation；Accordingly, entered according to the prediction data of the first area and the pixel of second area in decoding end
Row decoding operate.
In the embodiment of the present invention, according to pre-defined rule, predeterminated position in detection image block according to this（As prediction block second,
Third and fourth position）Sample point value, if the value of sample point where predeterminated position and the first position（Prediction block
Upper left position）When the value of the sample point at place is unequal, then using the value of the sample point where predeterminated position as the prediction
The prediction data of the pixel of the second area of block, you can obtain two different sample values respectively as first area and second
The prediction data of the pixel in region.The value of the sample point of whole image block need not be traveled through, encoding-decoding efficiency can be improved.
A kind of schematic flow sheet of the intra-frame prediction method of depth image that Fig. 4 is provided for another embodiment of the present invention, such as
Shown in Fig. 4, including：
401st, according to the intra prediction mode of current image block, it is determined that corresponding with the intra prediction mode described current
The prediction block of image block.
402nd, using the value of the sample point where the upper left corner of the prediction block as the first area of the prediction block picture
The prediction data of vegetarian refreshments.
Above-mentioned steps 401 and 402 implement the associated description that may be referred in figure illustrated embodiment, repeat no more.
Whether not the value of the sample point where the value of the sample point where the 403rd, determining the upper right corner of prediction block and the upper left corner
It is equal, step 404 is performed if the value of the sample point where the upper right corner is unequal with the value of the sample point where the upper left corner, if right
The value of the sample point where upper angle is equal with the value of the sample point where the upper left corner then to perform step 405.
404th, using the value of the sample point where the upper right corner of the prediction block as the second area of the prediction block picture
The prediction data of vegetarian refreshments.
Shown in Fig. 3, the value of the sample point where detecting the upper right Angle Position of prediction block, if the upper right corner position of the prediction block
When the value of the sample point where putting is unequal with the value of the sample point where the upper left position, then by the right side of the prediction block
The value of the sample point where upper Angle Position as the pixel of the second area of the prediction block prediction data.
The value of the sample point where the 405th, determining the lower left corner of prediction block is with the value of the sample point where the upper left corner
It is no unequal, perform step if the value of the sample point where the lower left corner is unequal with the value of the sample point where the upper left corner
406, step 407 is performed if the value of the sample point where the lower left corner is equal with the value of the sample point where the upper left corner.
406th, using the value of the sample point where the lower left corner of prediction block as the second area of the prediction block pixel
Prediction data.
When implementing, shown in Fig. 3, the value of the sample point where detecting the lower-left Angle Position of prediction block, if the prediction
When the value of the sample point where the lower-left Angle Position of block is unequal with the value of the sample point where the upper left position, then by institute
The value of the sample point where stating the lower-left Angle Position of prediction block as the pixel of the second area of the prediction block prediction number
According to.
Whether not the value of the sample point where the value of the sample point where the 407th, determining the lower right corner of prediction block and the upper left corner
It is equal, step 408 is performed if the value of the sample point where the lower right corner is unequal with the value of the sample point where the upper left corner, if right
The value of the sample point where inferior horn is equal with the value of the sample point where the upper left corner then to perform step 409.
408th, using the value of the sample point where the lower right corner of prediction block as the second area of the prediction block pixel
Prediction data.
When implementing, shown in Fig. 3, the value of the sample point where detecting the lower right position of prediction block, if the prediction
When the value of the sample point where the lower right position of block is unequal with the value of the sample point where the upper left position, then by institute
The value of the sample point where stating the lower right position of prediction block as the pixel of the second area of the prediction block prediction number
According to.
409th, the prediction data of the pixel of the second area of prediction block is entered as default numerical value.
Wherein, the numerical value includes 2(n-1), n is the accuracy value of sample point, and such as value is 8 bits, 10 bits, 12 bits
Deng.
Explanation is needed further exist for, because above-mentioned first area and second area are possible in one image block of covering
Larger area, therefore SDC DC can be obtained with the mid-point position of detection image block in addition to detection aforementioned four position
Value；Alternatively, also include after step 407：
If the sample where the value of the sample point where the upper right corner of the prediction block, the lower left corner and the lower right corner and the upper left corner
When the value of point is equal, then value and the sample where the upper left corner of the sample point where further determining that the centre position of the prediction block
Whether the value of this point is unequal；
If unequal, using the value of the sample point where the centre position of the prediction block as the second of the prediction block
The prediction data of the pixel in region.
If equal, step 409 is performed, the prediction data of the pixel of the second area of the prediction block is entered as pre-
If numerical value, the numerical value include 2(n-1), n is the accuracy value of sample point, and such as value is 8 bits, 10 bits, 12 compares top grade.
In the embodiment of the present invention, according to pre-defined rule, predeterminated position in detection image block according to this（Such as the upper right of prediction block
Angle, the lower left corner, lower right position）Sample point value, if the value of sample point where predeterminated position and the first position（In advance
Survey the upper left position of block）When the value of the sample point at place is unequal, then using the value of the sample point where predeterminated position as institute
State the prediction data of the pixel of the second area of prediction block, you can obtain two different sample values respectively as first area
With the prediction data of the pixel of second area.The value of the sample point of whole image block need not be traveled through, encoding and decoding can be improved
Efficiency.
It should be noted that the prediction data of pixel in prediction block is determined in first area and second area it
Afterwards, in the present embodiment, for example, the pixel value of each pixel in current image block in first area can be obtained, by each pixel
Pixel value be added after the average pixel value of pixel in current image block in first area is obtained divided by pixel number；
Similarly also can obtain the average pixel value of the pixel in current image block in second area；By first area in current image block
In pixel average pixel value and prediction block in the prediction data of pixel in first area subtract each other and obtain first area
Pixel value residual error, by second area in the average pixel value of the pixel in second area in current image block and prediction block
In the prediction data of pixel subtract each other the residual error of the pixel value for obtaining second area, afterwards, respectively by first, second region
The residual error of pixel value is performed the encoding operation, and is finally carried out entropy code and is obtained coded bit stream.Decoding end is flowed into according to coded-bit
The row processing procedure opposite with coding side, you can obtain the reconstruct data of current image block.
A kind of structural representation of the infra-frame prediction device of depth image that Fig. 5 is provided for one embodiment of the invention, such as Fig. 5
It is shown, including:Determining module 51 and connected prediction module 52；
Determining module 51, for the intra prediction mode according to current image block, it is determined that with the intra prediction mode pair
The prediction block of the current image block answered, the prediction block includes first area and second area；
Prediction module 52, the value for the sample point where the first position of the prediction block for determining the determining module is made
It is the prediction data of the pixel in the region of the corresponding prediction block of the sample point；The region of the corresponding prediction block of the sample point
It is the first area.
The determining module 51, is additionally operable to detect the value of sample point where the predeterminated position in the prediction block, determines institute
Whether the value for stating sample point where predeterminated position is unequal with the value of the sample point where the first position；
The prediction module 52, is additionally operable to the value of sample point and institute where the determining module determines the predeterminated position
When the value of the sample point where stating first position is unequal, using the value of the sample point where the predeterminated position as the prediction
The prediction data of the pixel of the second area of block.
Alternatively, the prediction module 52, is additionally operable to the sample point where the determining module determines the predeterminated position
Value it is equal with the value of the sample point where the first position when, by the prediction of the pixel of the second area of the prediction block
Data are entered as default numerical value；
Wherein, the numerical value includes 2(n-1), wherein, n is the accuracy value of sample point.
Alternatively, the first position includes the upper left position of the prediction block；The predeterminated position at least includes three
Individual position, respectively second, third and the 4th position.
Alternatively, the prediction module 52 specifically for：Determine the second place of the prediction block in the determining module
When the value of the sample point at place is unequal with the value of the sample point where the first position, by the second place of the prediction block
The value of the sample point at place as the pixel of the second area of the prediction block prediction data, the second place include institute
State the upper right Angle Position of prediction block；Or
The sample point where the second Angle Position that the determining module determines the prediction block value with described first
When the value of the sample point where putting is equal, and sample point where the 3rd position of the prediction block value and the first position
When the value of the sample point at place is unequal, using the value of the sample point where the 3rd position of the prediction block as the prediction block
Second area pixel prediction data, the lower-left Angle Position of the 3rd position including the prediction block；Or
Determine the second of the prediction block and the value and described of the 3rd sample point where position in the determining module
When the value of the sample point where one position is equal, and the sample point where the 4th position of the prediction block value and described first
When the value of the sample point where position is unequal, using the value of the sample point where the 4th position of the prediction block as described pre-
The prediction data of the pixel of the second area of block is surveyed, the 4th position includes the lower right position of the prediction block.
Alternatively, the predeterminated position also includes the 5th position, and the 5th position includes the interposition of the prediction block
Put.
Alternatively, the prediction module 52 is specifically additionally operable to：Determine second, the of the prediction block in the determining module
When the value of the sample point where the three and the 4th position is equal with the value of the sample point where the first position, and the prediction block
The 5th position where sample point value it is unequal with the value of the sample point where the first position when, by the prediction block
The 5th position where sample point value as the pixel of the second area of the prediction block prediction data, the described 5th
Position includes the centre position of the prediction block.
Alternatively, the prediction module 52 is specifically additionally operable to：
The determining module determine the prediction block second, third, the 4th and the 5th sample point where position
When value is equal with the value of the sample point where the first position, by the prediction number of the pixel of the second area of the prediction block
According to being entered as default numerical value, wherein, the numerical value includes 2(n-1), wherein, n is the accuracy value of sample point.
Alternatively, the present embodiment described device also includes：Coding module 53 and decoder module 54, with prediction module 52 respectively
Connection；
Wherein, coding module 53 is used for the pixel of the first area and second area obtained according to the prediction module 52
Prediction data perform the encoding operation；
Decoder module 54 is used for the pre- of the pixel of the first area and second area obtained according to the prediction module 52
Surveying data carries out decoding operate.
In the embodiment of the present invention, according to pre-defined rule, predeterminated position in detection image block according to this（As prediction block second,
Three, the 4th and the 5th position）Sample point value, if the value of sample point where predeterminated position and the first position（In advance
Survey the upper left position of block）When the value of the sample point at place is unequal, then using the value of the sample point where predeterminated position as institute
State the prediction data of the pixel of the second area of prediction block, you can obtain two different sample values respectively as first area
With the prediction data of the pixel of second area.The value of the sample point of whole image block need not be traveled through, encoding and decoding can be improved
Efficiency.
A kind of structural representation of the infra-frame prediction device of depth image that Fig. 6 is provided for another embodiment of the present invention, such as
Shown in Fig. 6, including processor 61 and memory 62, wherein, processor 61 is connected by bus with memory 62, in memory 62
Be stored with the instruction of the intra-frame prediction method for realizing depth image, can be held when processor 61 transfers the instruction in memory 62
Row following steps：
According to the intra prediction mode of current image block, it is determined that the present image corresponding with the intra prediction mode
The prediction block of block, first area and second area that the prediction block includes；
The value of the sample point where the first position of prediction block as the region of the corresponding prediction block of the sample point picture
The prediction data of vegetarian refreshments, the region of the corresponding prediction block of the sample point is the first area；
Detect the value of sample point where the predeterminated position in the prediction block, however, it is determined that sample point where the predeterminated position
Value it is unequal with the value of the sample point where the first position when, then the value of the sample point where the predeterminated position is made
It is the prediction data of the pixel of the second area of the prediction block.
Alternatively, detect after the value of sample point where the predeterminated position in the prediction block, also include：
If it is determined that when the value of sample point is equal with the value of the sample point where the first position where the predeterminated position,
The prediction data of the pixel of the second area of the prediction block is then entered as default numerical value.
Alternatively, the first position includes the upper left position of the prediction block；The predeterminated position at least includes three
Individual position, respectively second, third and the 4th position.
Alternatively, however, it is determined that the value of predeterminated position place sample point and the value of the sample point where the first position
When unequal, then using the value of the sample point where the predeterminated position as the pre- of the pixel of the second area of the prediction block
Data are surveyed, is specifically included：
If the value of the value of the sample point where the second place of the prediction block and the sample point where the first position
When unequal, then using the value of the sample point where the second place of the prediction block as the second area of the prediction block picture
The prediction data of vegetarian refreshments, the second place includes the upper right Angle Position of the prediction block；Or
If the value of the sample point where the second Angle Position of the prediction block and the sample point where the first position
When being worth equal, and value and the sample point where the first position of sample point where the 3rd position of the prediction block value
When unequal, then the picture of the second area using the value of the sample point where the 3rd position of the prediction block as the prediction block
The prediction data of vegetarian refreshments, the 3rd position includes the lower-left Angle Position of the prediction block；Or
If the second of the prediction block and the value and the sample where the first position of the 3rd sample point where position
When the value of point is equal, and sample point where the 4th position of the prediction block value and the sample point where the first position
Value it is unequal when, then using the value of the sample point where the 4th position of the prediction block as the prediction block second area
Pixel prediction data, the lower right position of the 4th position including the prediction block.
Alternatively, the predeterminated position also includes the 5th position, and the 5th position includes the interposition of the prediction block
Put.
Alternatively, however, it is determined that the value of predeterminated position place sample point and the value of the sample point where the first position
When unequal, then using the value of the sample point where the predeterminated position as the pre- of the pixel of the second area of the prediction block
Data are surveyed, is specifically also included：
If the value of the sample point where second, third and the 4th position of the prediction block with where the first position
When the value of sample point is equal, and sample point where the 5th position of the prediction block value and the sample where the first position
When the value of this point is unequal, then using the value of the sample point where the 5th position of the prediction block as the second of the prediction block
The prediction data of the pixel in region.
Alternatively, the present embodiment also includes：
If the prediction block second, third, the 4th and the 5th sample point where position value and the first position
When the value of the sample point at place is equal, then the prediction data of the pixel of the second area of the prediction block is entered as default
Numerical value.
Alternatively, the numerical value includes 2(n-1), wherein, n is the accuracy value of sample point.
Alternatively, the present embodiment also includes：
Prediction data according to the first area and the pixel of second area is performed the encoding operation.
Accordingly, the prediction data according to the first area and the pixel of second area carries out decoding operate.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be with
Realize by another way.For example, device embodiment described above is only schematical, for example, the unit
Divide, only a kind of division of logic function there can be other dividing mode when actually realizing, for example multiple units or component
Can combine or be desirably integrated into another system, or some features can be ignored, or do not perform.It is another, it is shown or
The coupling each other for discussing or direct-coupling or communication connection can be the indirect couplings of device or unit by some interfaces
Close or communicate to connect, can be electrical, mechanical or other forms.
The unit that is illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part for showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be according to the actual needs selected to realize the mesh of this embodiment scheme
's.
In addition, during each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a unit.Above-mentioned integrated list
Unit can both be realized in the form of hardware, it would however also be possible to employ hardware adds the form of SFU software functional unit to realize.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be by storage in the form of code in terms of one
In calculation machine read/write memory medium.Above-mentioned code storage is in a computer-readable recording medium, including some instructions are used to
Processor or hardware circuit is set to perform the part or all of step of each embodiment methods described of the invention.And foregoing storage is situated between
Matter includes：The miniature high power capacity mobile storage disc without phisical drive of USB, mobile hard disk, read-only deposit
Reservoir（English：Read-Only Memory, abbreviation ROM）, random access memory（English：Random Access Memory,
Abbreviation RAM）, magnetic disc or CD etc. are various can be with the medium of store program codes.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
Modified with to the technical scheme described in foregoing embodiments, or equivalent is carried out to which part technical characteristic；
And these modifications or replacement, do not make the protection model of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution
Enclose.
Claims (18)
1. a kind of intra-frame prediction method of depth image, it is characterised in that including：
According to the intra prediction mode of current image block, it is determined that the current image block corresponding with the intra prediction mode
Prediction block, the prediction block includes first area and second area；
Using the value of the sample point where the first position of the prediction block as the region of the corresponding prediction block of the sample point
The prediction data of pixel, the region of the corresponding prediction block of the sample point is the first area；
Detect the value of sample point where the predeterminated position in the prediction block, however, it is determined that the value of sample point where the predeterminated position
When value with the sample point where the first position is unequal, then using the value of the sample point where the predeterminated position as institute
State the prediction data of the pixel of the second area of prediction block；
The first position includes the upper left position of the prediction block；
The predeterminated position at least includes three positions, respectively second, third and the 4th position, and the second place includes pre-
The upper right Angle Position of block is surveyed, the 3rd position includes the lower-left Angle Position of prediction block, and the 4th position includes prediction block
Lower right position.
2. according to the method described in claim 1, it is characterised in that sample point where the predeterminated position in the detection prediction block
After value, also include：
If it is determined that when the value of sample point is equal with the value of the sample point where the first position where the predeterminated position, then will
The prediction data of the pixel of the second area of the prediction block is entered as default numerical value.
3. method according to claim 1, it is characterised in that if it is determined that the value of sample point and institute where the predeterminated position
When the value of the sample point where stating first position is unequal, then using the value of the sample point where the predeterminated position as described pre-
The prediction data of the pixel of the second area of block is surveyed, is specifically included：
If the value of the value of the sample point where the second place of the prediction block and the sample point where the first position not phase
Deng when, then using the value of the sample point where the second place of the prediction block as the second area of the prediction block pixel
Prediction data, the upper right Angle Position of the second place including the prediction block；Or
If the value of the sample point where the second place of the prediction block is equal with the value of the sample point where the first position
When, and the value of the sample point where the 3rd position of the prediction block is unequal with the value of the sample point where the first position
When, then the pixel of the second area using the value of the sample point where the 3rd position of the prediction block as the prediction block
Prediction data, the 3rd position includes the lower-left Angle Position of the prediction block；Or
If the second of the prediction block and the value and the sample point where the first position of the 3rd sample point where position
When being worth equal, and value and the sample point where the first position of sample point where the 4th position of the prediction block value
When unequal, then the picture of the second area using the value of the sample point where the 4th position of the prediction block as the prediction block
The prediction data of vegetarian refreshments, the 4th position includes the lower right position of the prediction block.
4. method according to claim 1 and 2, it is characterised in that the predeterminated position also includes the 5th position, described the
Five positions include the centre position of the prediction block.
5. method according to claim 4, it is characterised in that if it is determined that the value of sample point and institute where the predeterminated position
When the value of the sample point where stating first position is unequal, then using the value of the sample point where the predeterminated position as described pre-
The prediction data of the pixel of the second area of block is surveyed, is specifically also included：
If the value and the sample where the first position of the sample point where second, third and the 4th position of the prediction block
When the value of point is equal, and sample point where the 5th position of the prediction block value and the sample point where the first position
Value it is unequal when, then using the value of the sample point where the 5th position of the prediction block as the prediction block second area
Pixel prediction data.
6. method according to claim 4, it is characterised in that also include：
If the prediction block second, third, the 4th and the 5th sample point where position value and the first position where
Sample point value it is equal when, then the prediction data of the pixel of the second area of the prediction block is entered as default number
Value.
7. the method according to claim 2 or 6, it is characterised in that：
The numerical value includes 2(n-1), wherein, n is the accuracy value of sample point.
8. method according to claim 1 and 2, it is characterised in that also include：
Prediction data according to the first area and the pixel of second area is performed the encoding operation.
9. method according to claim 8, it is characterised in that also include：
Prediction data according to the first area and the pixel of second area carries out decoding operate.
10. the infra-frame prediction device of a kind of depth image, it is characterised in that including:
Determining module, for the intra prediction mode according to current image block, it is determined that institute corresponding with the intra prediction mode
The prediction block of current image block is stated, the prediction block includes first area and second area；
Prediction module, for corresponding pre- using the value of the sample point where the first position of the prediction block as the sample point
The prediction data of the pixel in the region of block is surveyed, the region of the corresponding prediction block of the sample point is the first area；
The determining module, is additionally operable to detect the value of sample point where the predeterminated position in the prediction block, determines described default
Whether the value of sample point is unequal with the value of the sample point where the first position where position；
The prediction module, is additionally operable to the value of sample point and described first where the determining module determines the predeterminated position
When the value of the sample point where position is unequal, using the value of the sample point where the predeterminated position as the of the prediction block
The prediction data of the pixel in two regions；
The first position includes the upper left position of the prediction block；
The predeterminated position at least includes three positions, respectively second, third and the 4th position, and the second place includes pre-
The upper right Angle Position of block is surveyed, the 3rd position includes the lower-left Angle Position of prediction block, and the 4th position includes prediction block
Lower right position.
11. according to the device described in claim 10, it is characterised in that：
The prediction module, is additionally operable to the value of sample point and described first where the determining module determines the predeterminated position
When the value of the sample point where position is equal, the prediction data of the pixel of the second area of the prediction block is entered as presetting
Numerical value.
12. devices according to claim 10, it is characterised in that the prediction module specifically for：In the determination mould
Block determine the second place of the prediction block where sample point value and the sample point where the first position value not phase
Deng when, using the value of the sample point where the second place of the prediction block as the pixel of the second area of the prediction block
Prediction data, the second place includes the upper right Angle Position of the prediction block；Or
Value and the first position institute in the sample point where the second Angle Position that the determining module determines the prediction block
Sample point value it is equal when, and sample point where the 3rd position of the prediction block value and the first position where
Sample point value it is unequal when, using the value of the sample point where the 3rd position of the prediction block as the of the prediction block
The prediction data of the pixel in two regions, the 3rd position includes the lower-left Angle Position of the prediction block；Or
The determining module determine the second of the prediction block and the value of the 3rd sample point where position with described first
When the value of the sample point where putting is equal, and sample point where the 4th position of the prediction block value and the first position
When the value of the sample point at place is unequal, using the value of the sample point where the 4th position of the prediction block as the prediction block
Second area pixel prediction data, the lower right position of the 4th position including the prediction block.
13. device according to claim 10 or 11, it is characterised in that the predeterminated position also includes the 5th position, institute
State centre position of the 5th position including the prediction block.
14. devices according to claim 13, it is characterised in that the prediction module is specifically additionally operable to：In the determination
Module determine second, third and the 4th position of the prediction block where sample point value and the sample where the first position
When the value of this point is equal, and sample point where the 5th position of the prediction block value and the sample where the first position
Point value it is unequal when, using the value of the sample point where the 5th position of the prediction block as the prediction block second area
Pixel prediction data, the centre position of the 5th position including the prediction block.
15. devices according to claim 13, it is characterised in that the prediction module is specifically additionally operable to：
The determining module determine the prediction block second, third, the 4th and the 5th sample point where position value with
When the value of the sample point where the first position is equal, the prediction data of the pixel of the second area of the prediction block is assigned
It is default numerical value to be worth.
16. device according to claim 11 or 15, it is characterised in that：
The numerical value includes 2(n-1), wherein, n is the accuracy value of sample point.
17. device according to claim 10 or 11, it is characterised in that also include：
Coding module, for being performed the encoding operation according to the prediction data of the first area and the pixel of second area.
18. devices according to claim 17, it is characterised in that also include：
Decoder module：Prediction data according to the first area and the pixel of second area carries out decoding operate.
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| PT3457689T (en) * | 2010-05-25 | 2020-10-15 | Lg Electronics Inc | New planar prediction mode |
| US20120147961A1 (en) * | 2010-12-09 | 2012-06-14 | Qualcomm Incorporated | Use of motion vectors in evaluating geometric partitioning modes |
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