CN106817583A - A kind of HEVC SAO computational methods and device - Google Patents
A kind of HEVC SAO computational methods and device Download PDFInfo
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Abstract
The invention discloses a kind of HEVC SAO computational methods and device, described device includes acquisition module, sequence number computing module, deviant determining module, judge module, addition module and output module, original pixels and the corresponding reference pixel of the original pixel value first according to acquired in acquisition module calculate deviant, then the value of bite rate control command parameter of the judge module according to acquired in judges pixel value or offset pixel values of the final output using original image vegetarian refreshments, so that SAO decodings are divided into the completion of two-stage flowing water, accelerate the speed that SAO decodings are calculated, it is greatly simplified as SAO decoding calculation process steps, the hardware area of SAO computing devices is decreased in hardware circuit design, so as to reduce hardware cost, thus there are wide market prospects in computer chip field.
Description
Technical field
The present invention relates to computer chip field, more particularly to a kind of HEVC SAO computational methods and device.
Background technology
HEVC (High Efficiency Video Coding) is by International Telecommunication Union (ITU) and motion diagram
As the video encoding and decoding standard of future generation that the tissue JCTVC that expert group (MPEG) joint is set up is proposed.
Target be on the premise of identical visual effect, compared to previous generation standards H.264/AVC, compression ratio
Double.
SAO (Sample Adaptive Offset) module, i.e. self adaptation sampling point compensating module, module master
The value of side-play amount is obtained by the comparing of pixel value after original pixel value with treatment after filtering, then will be inclined
The value of shifting amount is added to after processing after filtering on pixel value, reduces the distortion of image, has reconstruction image
There are better quality and PSNR values (Y-PSNR).
The HEVC provided in official decodes SAO processing frameworks, and being converted into hardware circuit needs consumption
Great amount of hardware resources, and efficient hardware decoding performance cannot be provided.
The content of the invention
For this reason, it may be necessary to provide a kind of HEVC SAO computational methods and device, it is used to solve existing SAO
Computing device hardware circuit is complicated, hardware area is big, high cost, big power consumption the problems such as.
To achieve the above object, a kind of HEVC SAO computing devices, described device bag are inventor provided
Include acquisition module, sequence number computing module, deviant determining module, judge module, addition module and output
Module；The acquisition module includes original pixels acquisition module, reference pixel acquisition module and bite rate control
Command parameter acquisition module；The original pixels acquisition module is connected with sequence number computing module, the reference
Pixel acquisition module is connected with sequence number computing module, and the sequence number computing module confirms that module connects with deviant
Connect, the deviant confirms that module is connected with judge module, and the judge module is connected with addition module,
The bite rate control command parameter acquisition module is connected with the judge module；The judge module and output
Module is connected, and the addition module is connected with output module；
The original pixels acquisition module is used to obtain original image vegetarian refreshments；
The SAO types that the reference pixel acquisition module is used for the block of pixels according to where original image vegetarian refreshments are obtained
The corresponding reference image vegetarian refreshments of the original image vegetarian refreshments；
The sequence number computing module is used to calculate the pixel value of original image vegetarian refreshments and reference image vegetarian refreshments,
Obtain a sequence number value；
The deviant determining module is used for the sequence number of the SAO types of block of pixels according to where original image vegetarian refreshments
Value and the mapping relations of deviant, obtain the corresponding deviant of sequence number value that sequence number computing module is calculated；
The bite rate control command parameter acquisition module is used to obtain bite rate control command parameter；
The value that the judge module is used for the bite rate control command parameter according to acquired in judges whether using original
The pixel value of beginning pixel, it is described defeated if then transmitting to output module the pixel value of original image vegetarian refreshments
Go out module for exporting the pixel value of original image vegetarian refreshments；Otherwise addition module is used for the picture of original image vegetarian refreshments
Element value is added with deviant, obtains offset pixel values, and the offset pixel values are transmitted to output module,
The output module is used for output offset pixel value.
Further, described device also includes memory cell, and the memory cell is used to store original pixels
Select and reference image vegetarian refreshments.
Further, the memory cell is register array.
Further, the SAO types of block of pixels where the original image vegetarian refreshments include BO types, EO-0
Type, EO-1 types, EO-2 types and EO-3 types.
Further, the value of bite rate control command parameter is 0 or 1.
Inventor additionally provides a kind of HEVC SAO computational methods, and methods described is applied to HEVC SAO
Computing device includes acquisition module, sequence number computing module, deviant determining module, judge module, addition
Module and output module；The acquisition module includes original pixels acquisition module, reference pixel acquisition module
With bite rate control command parameter acquisition module；The original pixels acquisition module is connected with sequence number computing module,
The reference pixel acquisition module is connected with sequence number computing module, and the sequence number computing module is true with deviant
Recognize module connection, the deviant confirms that module is connected with judge module, the judge module and addition mould
Block is connected, and the bite rate control command parameter acquisition module is connected with the judge module；The judgement mould
Block is connected with output module, and the addition module is connected with output module；Methods described comprises the following steps：
Original pixels acquisition module obtains original image vegetarian refreshments；
Reference pixel acquisition module SAO types of block of pixels according to where original image vegetarian refreshments obtain the original image
The corresponding reference image vegetarian refreshments of vegetarian refreshments；
Sequence number computing module is calculated the pixel value of original image vegetarian refreshments and reference image vegetarian refreshments, obtains a sequence
Number value；
Deviant the determining module sequence number value of the SAO types of block of pixels and skew according to where original image vegetarian refreshments
The mapping relations of value, obtain the corresponding deviant of sequence number value that sequence number computing module is calculated；
Bite rate control command parameter acquisition module is used to obtain bite rate control command parameter；
The value of bite rate control command parameter of the judge module according to acquired in judges whether using original image vegetarian refreshments
Pixel value, if then transmitting to output module the pixel value of original image vegetarian refreshments, output module output is former
The pixel value of beginning pixel；Otherwise with deviant be added the pixel value of original image vegetarian refreshments by addition module, obtains
To offset pixel values, and the offset pixel values are transmitted to output module, output module output offset picture
Element value.
Further, described device also includes memory cell, and methods described also includes：Memory cell is stored
Original image vegetarian refreshments and reference image vegetarian refreshments.
Further, the memory cell is register array.
Further, the SAO types of block of pixels where the original image vegetarian refreshments include BO types, EO-0
Type, EO-1 types, EO-2 types and EO-3 types.
Further, the value of bite rate control command parameter is 0 or 1.
HEVC SAO computational methods and device described in above-mentioned technical proposal, described device include obtaining mould
Block, sequence number computing module, deviant determining module, judge module, addition module and output module.Institute
The method of stating specifically includes following steps：Original pixels acquisition module obtains original image vegetarian refreshments first, then joins
Examine pixel acquisition module SAO types of block of pixels according to where original image vegetarian refreshments and obtain the original image vegetarian refreshments pair
The reference image vegetarian refreshments answered, then sequence number computing module the pixel value of original image vegetarian refreshments and reference image vegetarian refreshments is entered
Row is calculated, and obtains a sequence number value, then deviant determining module block of pixels according to where original image vegetarian refreshments
The sequence number value of SAO types and the mapping relations of deviant, obtain the sequence number value that sequence number computing module is calculated
Corresponding deviant, then bite rate control command parameter acquisition module is for obtaining bite rate control command parameter.
Then the value of bite rate control command parameter of the judge module according to acquired in judges whether using original image vegetarian refreshments
Pixel value, if then transmitting to output module the pixel value of original image vegetarian refreshments, output module output is former
The pixel value of beginning pixel；Otherwise with deviant be added the pixel value of original image vegetarian refreshments by addition module, obtains
To offset pixel values, and the offset pixel values are transmitted to output module, output module output offset picture
Element value.It is divided into two-stage for SAO decodings to complete, to calculate deviant, second step is selection to the first order
The value that the value of original image vegetarian refreshments exports original image vegetarian refreshments plus deviant or directly is exported, is greatly simplified as
SAO decodes calculation process step, accordingly, SAO computing devices is decreased in hardware circuit design
Hardware area, so as to reduce hardware cost, at the same the device of two-layer configuration can with continuous productive process, plus
The speed that fast SAO decodings are calculated, the design needs of power consumption are reduced so as to reach, thus in computer chip
Field has wide market prospects.
Brief description of the drawings
The schematic diagram of the HEVC SAO computing devices that Fig. 1 is related to for an embodiment of the present invention；
The flow chart of the HEVC SAO computational methods that Fig. 2 is related to for an embodiment of the present invention；
The schematic diagram of the register array that Fig. 3 is related to for an embodiment of the present invention.
Description of reference numerals：
101st, acquisition module；111st, original pixels acquisition module；121st, reference pixel acquisition module；
131st, bite rate control command parameter acquisition module；
102nd, sequence number computing module；
103rd, deviant determining module；
104th, judge module；
105th, addition module；
106th, output module.
Specific embodiment
To describe technology contents, structural feature, the objects and the effects of technical scheme in detail, below
In conjunction with specific embodiments and accompanying drawing is coordinated to be explained in detail.
Fig. 1 is referred to, is the signal of the HEVC SAO computing devices that an embodiment of the present invention is related to
Figure.Described device include acquisition module 101, sequence number computing module 102, deviant determining module 103,
Judge module 104, addition module 105 and output module 106；The acquisition module 101 includes original image
Plain acquisition module 111, reference pixel acquisition module 121 and bite rate control command parameter acquisition module 131；
The original pixels acquisition module 111 is connected with sequence number computing module 102, and the reference pixel obtains mould
Block 131 is connected with sequence number computing module 102, and the sequence number computing module 102 confirms module with deviant
103 connections, the deviant confirms that module 103 is connected with judge module 104, the judge module 104
It is connected with addition module 105, the bite rate control command parameter acquisition module 131 and the judge module
104 connections；The judge module 104 is connected with output module 106, the addition module 105 with output
Module 106 is connected；
The original pixels acquisition module 111 is used to obtain original image vegetarian refreshments；
The reference pixel acquisition module 121 is used for the SAO types of the block of pixels according to where original image vegetarian refreshments
Obtain the corresponding reference image vegetarian refreshments of the original image vegetarian refreshments；
Based on the sequence number computing module 102 is carried out by the pixel value to original image vegetarian refreshments and reference image vegetarian refreshments
Calculate, obtain a sequence number value；
The deviant determining module 103 is used for the SAO types of block of pixels according to where original image vegetarian refreshments
Sequence number value and the mapping relations of deviant, obtain the corresponding skew of sequence number value that sequence number computing module is calculated
Value；
The bite rate control command parameter acquisition module 131 is used to obtain bite rate control command parameter；
The value that the judge module 104 is used for the bite rate control command parameter according to acquired in judges whether to adopt
With the pixel value of original image vegetarian refreshments, if then the pixel value of original image vegetarian refreshments is transmitted to output module, institute
Output module is stated for exporting the pixel value of original image vegetarian refreshments；Otherwise addition module is used for original image vegetarian refreshments
Pixel value be added with deviant, obtain offset pixel values, and the offset pixel values are transmitted to output
Module, the output module is used for output offset pixel value.
When SAO decoding calculating is carried out using HEVC SAO computing devices, original pixels are obtained first
Module obtains original image vegetarian refreshments.In the present embodiment, the original pixels are filtered pixel.
Then reference pixel acquisition module SAO types of block of pixels according to where original image vegetarian refreshments obtain the original image
The corresponding reference image vegetarian refreshments of vegetarian refreshments.The SAO types of block of pixels include BO classes where the original image vegetarian refreshments
Type, EO-0 types, EO-1 types, EO-2 types and EO-3 types.In the present embodiment, institute
Stating device also includes memory cell, and the memory cell is used to store original image vegetarian refreshments and reference image vegetarian refreshments.
Preferably, the memory cell is register array.Register array is one group of register of queueing discipline
Group.As shown in figure 3, the schematic diagram of the register array being related to for an embodiment of the present invention.Wherein count
Word 1-9 represents register respectively, for convenience of description, is deposited with a register in register array below
As a example by one pixel of storage, it is described further to obtaining reference image vegetarian refreshments according to the SAO types of block of pixels.
Assuming that the pixel of register 1-9 storages is posted to store pixel A in A-I, i.e. register 1 in Fig. 3
Pixel B is stored in storage 2, pixel I is stored in register 9.Pixel 1-9 belongs to a picture
Plain block, so that pixel E (pixel stored in register 5) is for original image vegetarian refreshments as an example, works as SAO
When type includes BO types, without choosing reference image vegetarian refreshments；When SAO types are EO-0 types, as
The corresponding reference image vegetarian refreshments of vegetarian refreshments E is pixel D and pixel F, i.e., with the immediate left sides of pixel E
Two pixels on right both sides；When SAO types are EO-1 types, the corresponding reference images of pixel E
Vegetarian refreshments is pixel B and pixel H, i.e., upper and lower two pixels immediate with pixel E；Work as SAO
When type is EO-1 types, the corresponding reference image vegetarian refreshments of pixel E is pixel A and pixel I, i.e.,
With the immediate upper left sides of pixel E and the pixel of lower right；When SAO types are EO-1 types,
The corresponding reference image vegetarian refreshments of pixel E is pixel C and pixel G, i.e., immediate with pixel E
Upper right side and the pixel of lower left.
Then sequence number computing module is calculated the pixel value of original image vegetarian refreshments and reference image vegetarian refreshments, is obtained
One sequence number value.Sequence number computing module is compared displacement to the pixel value of original image vegetarian refreshments and reference image vegetarian refreshments
Deng operation, and then sequence number value is obtained, specific computational methods are in accordance with HEVC agreements.Then deviant is true
Mapping of the cover half block 103 according to the sequence number value and deviant of the SAO types of block of pixels where original image vegetarian refreshments
Relation, obtains the corresponding deviant of sequence number value that sequence number computing module is calculated.Picture where original image vegetarian refreshments
The SAO types of plain block are different, and sequence number value is also just different from the mapping relations of deviant.So far, deviant
Calculate and complete, complete the one-level decoding that SAO decodings are calculated.
Then bite rate control command parameter acquisition module obtains bite rate control command parameter.Then judge module
Value according to acquired bite rate control command parameter judges whether to use the pixel value of original image vegetarian refreshments, if
It is to transmit to output module the pixel value of original image vegetarian refreshments, the output module exports original image vegetarian refreshments
Pixel value；Otherwise with deviant be added the pixel value of original image vegetarian refreshments by addition module, obtains offseting picture
Element value, and the offset pixel values are transmitted to output module, the output module output offset pixel value.
In the present embodiment, the value of bite rate control command parameter is 0 or 1.When bite rate control command parameter can be with
Obtained by parsing bite rate control order.When the value of bite rate control command parameter is 0, then output module
Output original pixel value, when the value of bite rate control command parameter is 1, output module output offset pixel
Value, the offset pixel values are the pixel value of original image vegetarian refreshments and deviant is added the value for obtaining.So far,
SAO decoding calculating is fully completed, and completes two grades of decodings that SAO decodings are calculated.
2 are referred to, is the flow chart of the HEVC SAO computational methods that an embodiment of the present invention is related to.
And inventor additionally provides a kind of HEVC SAO computational methods, methods described is applied to
HEVC SAO computing devices include acquisition module, sequence number computing module, deviant determining module, judgement
Module, addition module and output module；The acquisition module includes original pixels acquisition module, reference image
Plain acquisition module and bite rate control command parameter acquisition module；The original pixels acquisition module and sequence number meter
Module connection is calculated, the reference pixel acquisition module is connected with sequence number computing module, and the sequence number calculates mould
Block confirms that module is connected with deviant, and the deviant confirms that module is connected with judge module, the judgement
Module is connected with addition module, and the bite rate control command parameter acquisition module is connected with the judge module；
The judge module is connected with output module, and the addition module is connected with output module；Methods described bag
Include following steps：
Initially enter step S201 original pixels acquisition module and obtain original image vegetarian refreshments.In the present embodiment,
The original pixels are filtered pixel.Then enter step S202 reference pixels acquisition module according to
The SAO types of block of pixels obtain the corresponding reference image vegetarian refreshments of the original image vegetarian refreshments where original image vegetarian refreshments.Institute
State the SAO types of block of pixels where original image vegetarian refreshments include BO types, EO-0 types, EO-1 types,
EO-2 types and EO-3 types.In the present embodiment, described device also includes memory cell, described
Memory cell is used to store original image vegetarian refreshments and reference image vegetarian refreshments.Preferably, the memory cell is to post
Storage array.Register array is one group of register group of queueing discipline.As shown in figure 3, being the present invention
The schematic diagram of the register array that one implementation method is related to.Wherein numeral 1-9 represents register respectively, in order to
It is easy to explanation, below so that a register in register array stores a pixel as an example, to basis
The SAO types of block of pixels obtain reference image vegetarian refreshments and are described further.Assuming that register 1-9 is deposited in Fig. 3
The pixel of storage is storage pixel A in A-I, i.e. register 1, and pixel B is stored in register 2,
Pixel I is stored in register 9.Pixel 1-9 belongs to a block of pixels, with pixel E (deposits
The pixel stored in device 5) for as a example by original image vegetarian refreshments, when SAO types include BO types, nothing
Reference image vegetarian refreshments need to be chosen；When SAO types are EO-0 types, the corresponding reference image vegetarian refreshments of pixel E
It is pixel D and pixel F, i.e., with two pixels of the immediate the right and lefts of pixel E；When
When SAO types are EO-1 types, the corresponding reference image vegetarian refreshments of pixel E is pixel B and pixel
H, i.e., upper and lower two pixels immediate with pixel E；When SAO types are EO-1 types,
The corresponding reference image vegetarian refreshments of pixel E is pixel A and pixel I, i.e., immediate with pixel E
Upper left side and the pixel of lower right；When SAO types are EO-1 types, the corresponding ginsengs of pixel E
Pixel is examined for pixel C and pixel G, i.e., with the immediate upper right side of pixel E and lower left
Pixel.
The pixel value of original image vegetarian refreshments and reference image vegetarian refreshments is entered into step S203 sequence numbers computing module then
Row is calculated, and obtains a sequence number value.Sequence number computing module is to original image vegetarian refreshments and the pixel value of reference image vegetarian refreshments
The operation such as displacement is compared, and then obtains sequence number value, specific computational methods are in accordance with HEVC agreements.
Then deviant determining module 103 according to the sequence number value of the SAO types of block of pixels where original image vegetarian refreshments with
The mapping relations of deviant, obtain the corresponding deviant of sequence number value that sequence number computing module is calculated.It is original
The SAO types of block of pixels are different where pixel, and sequence number value is also just different from the mapping relations of deviant.
So far, deviant is calculated and completed, and completes the one-level decoding that SAO decodings are calculated.
Then enter step S204 bite rate control command parameters acquisition module and obtain bite rate control command parameter.
Then the value of the bite rate control command parameter into step S205 judge modules according to acquired in judges whether to adopt
With the pixel value of original image vegetarian refreshments, if then into step S206 by the pixel value of original image vegetarian refreshments transmit to
Output module, the output module exports the pixel value of original image vegetarian refreshments；Otherwise enter step S207 additions
With deviant be added the pixel value of original image vegetarian refreshments by module, obtains offset pixel values, and by the skew
Pixel value is transmitted to output module, the output module output offset pixel value.In the present embodiment,
The value of bite rate control command parameter is 0 or 1.When bite rate control command parameter can be by parsing bite rate control
Order is obtained.When the value of bite rate control command parameter is 0, then output module exports original pixel value,
When the value of bite rate control command parameter is 1, output module output offset pixel value, the offset pixels
The pixel value that value is original image vegetarian refreshments is added the value for obtaining with deviant.So far, SAO decodings calculate complete
Portion completes, and completes two grades of decodings that SAO decodings are calculated.
HEVC SAO computational methods and device described in above-mentioned technical proposal, described device include obtaining mould
Block, sequence number computing module, deviant determining module, judge module, addition module and output module.Institute
The method of stating specifically includes following steps：Original pixels acquisition module obtains original image vegetarian refreshments first, then joins
Examine pixel acquisition module SAO types of block of pixels according to where original image vegetarian refreshments and obtain the original image vegetarian refreshments pair
The reference image vegetarian refreshments answered, then sequence number computing module the pixel value of original image vegetarian refreshments and reference image vegetarian refreshments is entered
Row is calculated, and obtains a sequence number value, then deviant determining module block of pixels according to where original image vegetarian refreshments
The sequence number value of SAO types and the mapping relations of deviant, obtain the sequence number value that sequence number computing module is calculated
Corresponding deviant, then bite rate control command parameter acquisition module is for obtaining bite rate control command parameter.
Then the value of bite rate control command parameter of the judge module according to acquired in judges whether using original image vegetarian refreshments
Pixel value, if then transmitting to output module the pixel value of original image vegetarian refreshments, output module output is former
The pixel value of beginning pixel；Otherwise with deviant be added the pixel value of original image vegetarian refreshments by addition module, obtains
To offset pixel values, and the offset pixel values are transmitted to output module, output module output offset picture
Element value.It is divided into two-stage for SAO decodings to complete, to calculate deviant, second step is selection to the first order
The value that the value of original image vegetarian refreshments exports original image vegetarian refreshments plus deviant or directly is exported, is greatly simplified as
SAO decodes calculation process step, accordingly, SAO computing devices is decreased in hardware circuit design
Hardware area, so as to reduce hardware cost, at the same the device of two-layer configuration can with continuous productive process, plus
The speed that fast SAO decodings are calculated, the design needs of power consumption are reduced so as to reach, thus in computer chip
Field has wide market prospects.
It should be noted that herein, such as first and second or the like relational terms are used merely to
One entity or operation are made a distinction with another entity or operation, and is not necessarily required or is implied
There is any this actual relation or order between these entities or operation.And, term " including ",
"comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that being including one
The process of row key element, method, article or terminal device not only include those key elements, but also including not having
There are other key elements being expressly recited, or also include being set for this process, method, article or terminal
Standby intrinsic key element.In the absence of more restrictions, by sentence " including ... " or " including ... "
The key element of restriction, it is not excluded that in the process including the key element, method, article or terminal device
Also there is other key element.Additionally, herein, the reason such as " being more than ", " being less than ", " exceeding "
Solve as not including this number；" more than ", " below ", " within " etc. be interpreted as including this number.
Although being described to the various embodiments described above, those skilled in the art once learn
Basic creative concept, then can make other change and modification, so above institute to these embodiments
Only embodiments of the invention are stated, scope of patent protection of the invention is not thereby limited, it is every using this
Equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly use
In other related technical fields, similarly it is included within scope of patent protection of the invention.
Claims (10)
1. a kind of HEVC SAO computing devices, it is characterised in that described device include acquisition module,
Sequence number computing module, deviant determining module, judge module, addition module and output module；It is described to obtain
Modulus block includes that original pixels acquisition module, reference pixel acquisition module and bite rate control command parameter are obtained
Module；The original pixels acquisition module is connected with sequence number computing module, the reference pixel acquisition module
It is connected with sequence number computing module, the sequence number computing module confirms that module is connected with deviant, the skew
Value confirms that module is connected with judge module, and the judge module is connected with addition module, the bite rate control
Command parameter acquisition module is connected with the judge module；The judge module is connected with output module, institute
Addition module is stated to be connected with output module；
The original pixels acquisition module is used to obtain original image vegetarian refreshments；
The SAO types that the reference pixel acquisition module is used for the block of pixels according to where original image vegetarian refreshments are obtained
The corresponding reference image vegetarian refreshments of the original image vegetarian refreshments；
The sequence number computing module is used to calculate the pixel value of original image vegetarian refreshments and reference image vegetarian refreshments,
Obtain a sequence number value；
The deviant determining module is used for the sequence number of the SAO types of block of pixels according to where original image vegetarian refreshments
Value and the mapping relations of deviant, obtain the corresponding deviant of sequence number value that sequence number computing module is calculated；
The bite rate control command parameter acquisition module is used to obtain bite rate control command parameter；
The value that the judge module is used for the bite rate control command parameter according to acquired in judges whether using original
The pixel value of beginning pixel, it is described defeated if then transmitting to output module the pixel value of original image vegetarian refreshments
Go out module for exporting the pixel value of original image vegetarian refreshments；Otherwise addition module is used for the picture of original image vegetarian refreshments
Element value is added with deviant, obtains offset pixel values, and the offset pixel values are transmitted to output module,
The output module is used for output offset pixel value.
2. a kind of HEVC SAO computing devices as claimed in claim 1, it is characterised in that described
Device also includes memory cell, and the memory cell is used to store original image vegetarian refreshments and reference image vegetarian refreshments.
3. a kind of HEVC SAO computing devices as claimed in claim 2, it is characterised in that described
Memory cell is register array.
4. HEVC SAO computing devices as claimed in claim 1, it is characterised in that described original
The SAO types of block of pixels include BO types, EO-0 types, EO-1 types, EO-2 where pixel
Type and EO-3 types.
5. HEVC SAO computing devices as claimed in claim 1, it is characterised in that bite rate control
The value of command parameter is 0 or 1.
6. a kind of HEVC SAO computational methods, it is characterised in that methods described is applied to HEVC SAO
Computing device includes acquisition module, sequence number computing module, deviant determining module, judge module, addition
Module and output module；The acquisition module includes original pixels acquisition module, reference pixel acquisition module
With bite rate control command parameter acquisition module；The original pixels acquisition module is connected with sequence number computing module,
The reference pixel acquisition module is connected with sequence number computing module, and the sequence number computing module is true with deviant
Recognize module connection, the deviant confirms that module is connected with judge module, the judge module and addition mould
Block is connected, and the bite rate control command parameter acquisition module is connected with the judge module；The judgement mould
Block is connected with output module, and the addition module is connected with output module；Methods described comprises the following steps：
Original pixels acquisition module obtains original image vegetarian refreshments；
Reference pixel acquisition module SAO types of block of pixels according to where original image vegetarian refreshments obtain the original image
The corresponding reference image vegetarian refreshments of vegetarian refreshments；
Sequence number computing module is calculated the pixel value of original image vegetarian refreshments and reference image vegetarian refreshments, obtains a sequence
Number value；
Deviant the determining module sequence number value of the SAO types of block of pixels and skew according to where original image vegetarian refreshments
The mapping relations of value, obtain the corresponding deviant of sequence number value that sequence number computing module is calculated；
Bite rate control command parameter acquisition module is used to obtain bite rate control command parameter；
The value of bite rate control command parameter of the judge module according to acquired in judges whether using original image vegetarian refreshments
Pixel value, if then transmitting to output module the pixel value of original image vegetarian refreshments, output module output is former
The pixel value of beginning pixel；Otherwise with deviant be added the pixel value of original image vegetarian refreshments by addition module, obtains
To offset pixel values, and the offset pixel values are transmitted to output module, output module output offset picture
Element value.
7. a kind of HEVC SAO computational methods as claimed in claim 6, it is characterised in that described
Device also includes memory cell, and methods described also includes：Memory cell stores original image vegetarian refreshments and reference
Pixel.
8. a kind of HEVC SAO computational methods as claimed in claim 7, it is characterised in that described
Memory cell is register array.
9. HEVC SAO computational methods as claimed in claim 6, it is characterised in that described original
The SAO types of block of pixels include BO types, EO-0 types, EO-1 types, EO-2 where pixel
Type and EO-3 types.
10. HEVC SAO computational methods as claimed in claim 6, it is characterised in that bite rate control
The value of command parameter is 0 or 1.
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