CN105208396B - A kind of encoding and decoding method and apparatus of video frame - Google Patents

A kind of encoding and decoding method and apparatus of video frame Download PDF

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CN105208396B
CN105208396B CN201410280844.6A CN201410280844A CN105208396B CN 105208396 B CN105208396 B CN 105208396B CN 201410280844 A CN201410280844 A CN 201410280844A CN 105208396 B CN105208396 B CN 105208396B
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current coded
coding
motion vector
coded unit
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CN105208396A (en
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姜东�
张学荣
武亚强
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Lenovo Beijing Ltd
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Lenovo Beijing Ltd
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Abstract

This application provides a kind of coding of video frame and coding/decoding methods and device, after the motion vector predictor for determining current coded unit to be encoded, determine the reference zone comprising current coded unit, initial value is distributed for current coded unit, and estimation is carried out in reference zone, determine the corresponding motion vector of current coded unit；According to motion vector and motion vector difference, current coded unit is encoded.In decoding, determines the motion vector predictor of current coded unit, motion vector difference is parsed from current coded unit, according to motion vector predictor and motion vector difference, determine motion vector；If motion vector is (0,0), then it is that reference unit, that is, current coded unit that the motion vector is directed toward distributes initial value, sets the residual error of current coded unit as zero；Using the initial value as the reconstructed value of current coded unit.Code efficiency can be improved in this method, reduces the scramble time, improves the video quality decoded.

Description

A kind of encoding and decoding method and apparatus of video frame
Technical field
This application involves technical field of video compression, the encoding and decoding method of more particularly to a kind of video frame And device.
Background technique
Before video data transmission, generally requires and compressed encoding is carried out to video data.Current video encoding standard In, original video frame is divided into: intracoded frame, also referred to as I frame (Intra-fram)；Single directional prediction frame, also referred to as P frame (Predictive-frame)；And bi-directional predicted frames, also referred to as B (Bidirectionally predicted-frame) three Seed type.
In order to improve the compression ratio of these three video frames, there has been proposed intra block replica code mode (Mode_ INTRABC, Mode_Intra Block Copy), i.e., in coding video frames, also allow for present encoding block in its adjacent region A match block is found in domain.Although the proposition of Mode_INTRABC improves the compression ratio of video frame to a certain extent, It is to be encoded currently based on Mode_INTRABC mode to video frame, the but problem low there may be code efficiency, in turn Also the video quality that subsequent decoding goes out is influenced.
Summary of the invention
In view of this, the application provides a kind of encoding and decoding method and apparatus of video frame, in an encoding process, guarantee Under the premise of the compression ratio of video frame, the code efficiency to coding video frames is improved, and improve the video quality decoded.
To achieve the above object, the application provides the following technical solutions: a kind of coding/decoding method of video frame, comprising:
Obtain current current coded unit to be decoded in video frame to be decoded；
Determine the motion vector predictor of the current coded unit；
The current coded unit is parsed, the corresponding motion vector difference of the current coded unit is obtained；
According to the motion vector difference and the motion vector predictor, the corresponding fortune of the current coded unit is determined Dynamic vector；
When the corresponding motion vector of the current coded unit is (0,0), it is determined that the current coded unit is institute The reference unit of motion vector direction is stated, distributes initial value for the reference unit, and set the residual of the current coded unit Difference is zero；
The initial value of the reference unit is determined as described work as by initial value and the residual error according to the reference unit The reconstructed value of preceding coding unit.
Preferably, the initial motion vectors predicted value of the determination current coded unit, comprising:
By the use intra block duplication that in the video frame, nearest one is decoded before the current coded unit Movement of the motion vector as the current coded unit corresponding to the coding unit of MODE_INTRABC coding mode coding Vector predictor.
Preferably, the motion vector predictor of the determination current coded unit, comprising:
When adjacent with the current coded unit in the video frame and in decoded prescribed coding unit, it is not present When the coding unit encoded using the MODE_INTRABC coding mode, be then set as the motion vector predictor (0, 0)。
Preferably, described adjacent with the current coded unit in the video frame and decoded prescribed coding list In member, there is no the coding units being decoded using the MODE_INTRABC coding mode, comprising:
When adjacent with the current coded unit in the video frame and be located above the current coded unit and left side Decoded coding unit in, there is no the coding units encoded using the MODE_INTRABC coding mode.
Preferably, further includes:
When there is the coding unit using MODE_INTRABC coding mode coding in the prescribed coding unit, Intermediate value then is taken to motion vector corresponding to adjacent with the current coded unit and decoded all coding units, by institute State motion vector predictor of the intermediate value as the current coded unit；Alternatively, by the video frame, in the present encoding Fortune corresponding to nearest one coding unit using MODE_INTRABC coding mode coding decoded before unit Motion vector predictor of the dynamic vector as the current coded unit.
It is preferably, described to distribute initial value for the reference unit, comprising:
By in the video frame with the reference unit close to and be located at the reference unit above coding unit in most Initial value of the reconstructed value of next line as each row in the reference unit；
Alternatively, by the video frame with the reference unit close to and be located at the reference unit on the left of coding unit In most it is right one column reconstructed value as the initial value respectively arranged in the reference unit；
Alternatively, by the video frame with the reference unit close to and decoded target code unit motion vector Abscissa and ordinate be compared, if the abscissa be greater than the ordinate, by the video frame with it is described Reference unit close to and be located at reference unit left coding unit most it is right one column reconstructed value as in the reference unit The reconstructed value respectively arranged；If the abscissa be less than the ordinate, by the video frame with the reference unit close to And reconstruction of the reconstructed value of the coding unit most next line above the reference unit as each row in the reference unit Value；If the abscissa be equal to the ordinate, according to the reference unit close to and be located at the reference unit on In the coding unit of side in most next line each pixel reconstructed value, and with the reference unit close to and be located at the reference In coding unit on the left of unit most it is right one column in each pixel reconstructed value, to pixel each in the reference unit carry out two Dimensional plane interpolation determines the reconstructed value of the reference unit；Wherein, the target code unit is positioned at the present encoding The coding unit of unit top or left side.
Preferably, when the corresponding motion vector of the current coded unit is not (0,0), then to the present encoding list Member is parsed, and while obtaining the current coded unit corresponding motion vector difference, also obtains the present encoding list The corresponding residual error of member；
After then determining the corresponding motion vector of the current coded unit, further includes: determine that the motion vector is signified To reference unit, and obtain the reconstructed value of the reference unit decoded；
According to the reconstructed value of the reference unit and the residual error parsed, the reconstruction of the current coded unit is constructed Value.
On the other hand, present invention also provides a kind of coding methods of video frame, comprising:
Obtain current current coded unit to be encoded in video frame；
Determine the motion vector predictor of the current coded unit；
The reference zone comprising the current coded unit is determined from the video frame, and is the current coded unit Distribute initial value；
According to other codings except the initial value and current coded unit of current coded unit in the reference zone The reconstructed value of unit carries out estimation in the reference zone, determines the corresponding motion vector difference of the present encoding Value；
According to the motion vector predictor and the motion vector difference, the corresponding fortune of the current coded unit is determined Dynamic vector；
According to the corresponding motion vector of the current coded unit and the motion vector difference, to the present encoding list Member is encoded.
Preferably, from the video frame where current coded unit, the reference comprising the current coded unit is determined Before region, further includes:
In prescribed coding unit that is adjacent with the current coded unit in the video frame and being encoded, it is not present When the coding unit encoded using intra block duplication MODE_INTRABC coding mode, then by the motion vector predictor It is revised as (0,0).
Preferably, described according to the motion vector and the motion vector difference, the current coded unit is carried out Coding, comprising:
It is when the corresponding motion vector of the current coded unit is (0,0), the current coded unit is corresponding residual Difference is set as 0；
According to the motion vector difference and the residual error, the current coded unit is encoded.
Preferably, the motion vector predictor of the determination current coded unit, comprising:
By in the video frame, nearest one uses MODE_INTRABC coding mode before the current coded unit Motion vector predictor of the motion vector corresponding to the coding unit encoded as the current coded unit；
Alternatively, by motion vector corresponding to all coding units that are adjacent with the current coded unit and being encoded Intermediate value is taken, using the intermediate value as the motion vector predictor of the current coded unit.
It is preferably, described to distribute initial value for the current coded unit, comprising:
By in the video frame with the current coded unit close to and be located at the current coded unit above coding Initial value of the reconstructed value of most next line as each row in the current coded unit in unit；
Alternatively, by the video frame with the current coded unit close to and be located at the current coded unit on the left of The reconstructed value of a most right column is as the initial value respectively arranged in the current coded unit in coding unit；
Alternatively, by the video frame with the current coded unit close to and the target code unit motion that has been encoded The abscissa and ordinate of vector are compared, if the abscissa be greater than the ordinate, by the video frame with The current coded unit close to and be located at the current coded unit on the left of coding unit most it is right one column reconstructed value conduct The initial value that the current coded unit respectively arranges；If the abscissa be less than the ordinate, by the video frame with The current coded unit close to and be located at the current coded unit above coding unit most next line reconstructed value conduct The initial value of each row of current coded unit；If the abscissa is equal to the ordinate, according to single with the reference Member close to and the coding unit that is located above the reference unit in most next line each pixel reconstructed value, and with it is described Reference unit close to and be located at the reference unit on the left of coding unit in most it is right one column in each pixel median, to institute It states each pixel in reference unit and carries out two-dimensional surface interpolation, determine the initial value of the current coded unit；Wherein, the mesh Marking coding unit is above the current coded unit or the coding unit in left side.
On the other hand, present invention also provides a kind of decoding apparatus of video frame, comprising:
Acquiring unit, for obtaining current current coded unit to be decoded in video frame to be decoded；
Predicting unit, for determining the motion vector predictor of the current coded unit；
Resolution unit obtains the corresponding fortune of the current coded unit for parsing to the current coded unit Dynamic vector difference；
Vector determination unit, for working as described according to the motion vector difference and the motion vector predictor, determining The corresponding motion vector of preceding coding unit；
With reference to determination unit, for when the corresponding motion vector of the current coded unit is (0,0), it is determined that described Current coded unit is the reference unit that the motion vector is directed toward, and distributes initial value for the reference unit, and described in setting The residual error of current coded unit is zero；
Decoding unit, for according to the reference unit initial value and the residual error, by the initial of the reference unit Value is determined as the reconstructed value of the current coded unit.
Preferably, the resolution unit, comprising:
First resolution unit, for by the video frame, nearest one to be decoded before the current coded unit Using intra block duplication MODE_INTRABC coding mode coding coding unit corresponding to motion vector be used as described in work as The motion vector predictor of preceding coding unit.
Preferably, the predicting unit, comprising:
First predicting unit, for when adjacent with the current coded unit in the video frame and decoded specified In coding unit, there is no when the coding unit encoded using the MODE_INTRABC coding mode, then the movement is sweared Amount predicted value is set as (0,0).
Preferably, first predicting unit, comprising:
First prediction subelement, for working as adjacent with the current coded unit in the video frame and being located at described current In the decoded coding unit in above coding unit and left side, there is no using the MODE_INTRABC coding mode into When the coding unit of row coding, the motion vector predictor is set as (0,0).
Preferably, further includes:
Second predicting unit uses the MODE_INTRABC coding mode for working as to exist in the prescribed coding unit When the coding unit of coding, then to fortune corresponding to adjacent with the current coded unit and decoded all coding units Dynamic vector takes intermediate value, using the intermediate value as the motion vector predictor of the current coded unit；
Alternatively, third predicting unit, is compiled for working as to exist in the prescribed coding unit using the MODE_INTRABC When the coding unit of pattern coding, by the video frame, nearest one is decoded before the current coded unit Motion vector corresponding to coding unit using MODE_INTRABC coding mode coding is as the present encoding list The motion vector predictor of member.
Preferably, described to include: for reference unit distribution initial value with reference to determination unit
By in the video frame with the reference unit close to and be located at the reference unit above coding unit in most Initial value of the reconstructed value of next line as each row of the reference unit；
Alternatively, by the video frame with the reference unit close to and be located at the reference unit on the left of coding unit In a most right column the initial value that is respectively arranged as the reference unit of reconstructed value；
Alternatively, by the video frame with the reference unit close to and decoded target code unit motion vector Abscissa and ordinate be compared, if the abscissa be greater than the ordinate, by the video frame with it is described Reference unit close to and be located at reference unit left coding unit most it is right one column reconstructed value as in the reference unit The reconstructed value respectively arranged；If the abscissa be less than the ordinate, by the video frame with the reference unit close to And reconstruction of the reconstructed value of the coding unit most next line above the reference unit as each row in the reference unit Value；If the abscissa be equal to the ordinate, according to the reference unit close to and be located at the reference unit on In the coding unit of side in most next line each pixel reconstructed value, and with the reference unit close to and be located at the reference In coding unit on the left of unit most it is right one column in each pixel reconstructed value, to pixel each in the reference unit carry out two Dimensional plane interpolation determines the reconstructed value of the reference unit；Wherein, the target code unit is positioned at the present encoding The coding unit of unit top or left side.
Present invention also provides a kind of code devices of video frame, comprising:
Acquiring unit, for obtaining current current coded unit to be encoded in video frame；
Vector prediction unit, for determining the motion vector predictor of the current coded unit；
Reference zone determination unit, for determining the reference area comprising the current coded unit from the video frame Domain, and initial value is distributed for the current coded unit；
Motion estimation unit, for according to the initial value of current coded unit in the reference zone and present encoding list The reconstructed value of other coding units except member carries out estimation in the reference zone, determines the present encoding Corresponding motion vector difference；
Vector determination unit, for working as described according to the motion vector predictor and the motion vector difference, determining The corresponding motion vector of preceding coding unit；
Coding unit is used for according to the corresponding motion vector of the current coded unit and the motion vector difference, right The current coded unit is encoded.
Preferably, further includes:
Prediction modification unit, for before the reference zone determination unit determines the reference zone, if described In video frame in and the prescribed coding unit that has been encoded adjacent with the current coded unit, there is no replicated using intra block When the coding unit that MODE_INTRABC coding mode is encoded, then the motion vector predictor is revised as (0,0).
Preferably, the coding unit, comprising:
Residual error setup unit is used for when the corresponding motion vector of the current coded unit is (0,0), will be described current The corresponding residual error of coding unit is set as 0；
Coded sub-units, for being carried out to the current coded unit according to the motion vector difference and the residual error Coding.
Preferably, the vector prediction unit, comprising:
First vector prediction unit, for being adopted for nearest one before the current coded unit by the video frame Motion vector corresponding to the coding unit for using MODE_INTRABC coding mode to be encoded is as the current coded unit Motion vector predictor；
Alternatively, the second vector prediction unit, for by all volumes that are adjacent with the current coded unit and being encoded Motion vector corresponding to code unit takes intermediate value, using the intermediate value as the motion vector predictor of the current coded unit.
Preferably, the reference zone determination unit, comprising:
First reference zone determination unit, for determining the reference comprising the current coded unit from the video frame Region, by the video frame with the current coded unit close to and be located at the current coded unit above coding unit In most next line initial value of the reconstructed value as each row of the current coded unit；
Alternatively, the second reference zone determination unit, includes the current coded unit for determining from the video frame Reference zone, by the video frame with the current coded unit close to and be located at the current coded unit on the left of volume The initial value that the reconstructed value of a most right column is respectively arranged as the current coded unit in code unit；
Alternatively, third reference zone determination unit, for by the video frame with the current coded unit close to and The abscissa and ordinate for the target code unit motion vector being encoded are compared, if the abscissa is greater than described Ordinate, then by the video frame with the current coded unit close to and be located at the current coded unit on the left of coding The initial value that the reconstructed value of the most right column of unit is respectively arranged as the current coded unit；If the abscissa is less than described vertical Coordinate, then by the video frame with the current coded unit close to and be located at the current coded unit above coding list Initial value of the reconstructed value of first most next line as each row of the current coded unit；If the abscissa is equal to the vertical seat Mark, then according to the reference unit close to and the coding unit that is located above the reference unit in each pixel in most next line Point reconstructed value, and with the reference unit close to and be located at the reference unit on the left of coding unit in most it is right one column in The median of each pixel carries out two-dimensional surface interpolation to pixel each in the reference unit, determines the present encoding list The initial value of member；Wherein, the target code unit is above the current coded unit or the coding unit in left side.
It can be seen via above technical scheme that the application has been after having determined the motion vector predictor of current coded unit, Carrying out with the current coded unit of determining contains the current coded unit in matched reference zone, and is the current volume Code unit is assigned with initial value, in this way, searching even if the motion vector predictor of current coded unit is (0,0) carrying out matching Suo Shi also can avoid the starting point of motion vector using the corresponding motion vector predictor of the current coded unit as starting point And the larger situation of actual value deviation reduces the scramble time so as to reduce search duration；Simultaneously as motion vector Starting point and actual value deviation reduce, but also the motion vector difference deviation of coding reduces, to reduce on encoding code stream It rises, improves code efficiency.
Meanwhile the coding/decoding method of the application can guarantee to be decoded the video encoded by the application, but also solution The Quality advance for the video that code goes out.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The embodiment of application for those of ordinary skill in the art without creative efforts, can also basis The attached drawing of offer obtains other attached drawings.
Fig. 1 shows a kind of flow diagram of coding method one embodiment of video frame of the application；
Fig. 2 shows a kind of flow diagrams of another embodiment of the coding method of video frame of the application；
Fig. 3 shows the relation schematic diagram of current unit to be encoded and adjacent encoder unit in the application；
Fig. 4 shows a kind of flow diagram of another embodiment of the coding method of video frame of the application；
Fig. 5 shows a kind of flow diagram of coding/decoding method one embodiment of video frame of the application；
Fig. 6 shows a kind of flow diagram of another embodiment of the coding/decoding method of video frame of the application；
Fig. 7 shows a kind of structural schematic diagram of code device one embodiment of video frame of the application；
Fig. 8 shows a kind of structural schematic diagram of decoding apparatus one embodiment of video frame of the application.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall in the protection scope of this application.
Inventor is by carrying out research hair to the existing process compressed based on Mode_INTRABC mode to video frame Existing: when encoding at present to video frame, coding mode used by the different coding unit in same video frame is possible to not Together, e.g., some coding units are encoded using intra block duplication Mode_INTRABC coding mode, and some coding units use Be intraframe coding Mode_INTRA mode.When needing to use to current coded unit to be encoded current in certain video frame When Mode_INTRABC mode is encoded, then need to search for matching in the peripheral region of current coded unit in the video frame Block.But during search match block at present, if the level of the corresponding motion vector predictor of the current coded unit When coordinate and vertical coordinate are zero, then the predicted value of motion vector can be become adjacent with current coded unit automatically and be located at The motion vector of the adjacent encoder unit of present encoding block left thus may cause the starting point and actual value of motion vector Deviation is excessive, and e.g., adjacent encoder unit is to be encoded using Mode_INTRA mode, then is difficult to search using Mode_ INTRABC mode and with the matched matching unit of the current coded unit, it is long so as to cause search time, and due to motion vector Starting point and actual value deviation it is excessive so that coding motion vector difference deviation it is larger, cause encoding code stream to rise, also drop Low code efficiency.
As above in order to solve the problems, such as, this application provides a kind of coding method of video frame and coding/decoding methods.
The coding/decoding method of video frame is introduced first below.
Referring to Fig. 1, it illustrates a kind of flow diagram of coding method one embodiment of video frame of the application, this realities The method for applying example may include:
101, obtain current current coded unit to be encoded in video frame.
It is understood that video frame may include I frame, P frame, B frame these three types video frame in any one.
It is generally the maximum region of multiple complementary overhangs by video frame cutting, often when reality encodes video frame A region is properly termed as a maximum coding unit (LCU, Large Code Unit), further by maximum fundamental region It is divided into smaller region, e.g., is divided maximum basic unit by quaternary tree, then the basic coding unit that obtains (CU, Code Unit).It is successively to be encoded to each coding unit marked off when being encoded.
For the ease of difference, in the embodiment of the present application, by the volume that current time in the video frame for needing to encode is to be encoded Code unit is known as current coded unit.
102, determine the motion vector predictor of the current coded unit.
For determining that the concrete mode of the motion vector predictor of the current coded unit does not limit in the embodiment of the present application Fixed, the mode of existing and any other determining motion vector predictor is suitable for the application.
103, the reference zone comprising the current coded unit is determined from the video frame, and be the current coded unit point With initial value.
Wherein, reference zone includes multiple coding units, which selected from the video frame, is used for Matched region is carried out with current coded unit to search out and the current volume to carry out estimation from the reference zone The code highest coding unit of units match degree.
The method of determination of reference zone to it is existing similar, be not only both with existing, in this application the reference Region can wrap containing coding unit position before deserving, and since the current coded unit is not yet encoded, the current volume Code unit does not have corresponding reconstructed value, and during reference zone scans for, it but needs the current coded unit Initial value is compared with the reconstructed value of each coding unit in the reference zone, for the ease of subsequent estimation, is needed An initial value is distributed for the current coded unit.
Wherein, which is equivalent to the encoded radio that the current coded unit is estimated in the reference zone, that is, estimates Reconstructed value.
104, according to other volumes except the initial value and current coded unit of current coded unit in the reference zone The reconstructed value of code unit, estimation is carried out in the reference zone, determines the corresponding motion vector difference of the present encoding Value.
Due to containing the current coded unit in the reference zone, the motion vector that can integrate the current coded unit is pre- Measured value determines the starting point of estimation in reference zone, in this way, work as the motion vector predictor of the current coded unit When for (0,0), then can have using the current coded unit as the search starting point of estimation without changing search starting point Duration is searched for conducive to reducing, improves search matching precision, and then finally reduces the inclined of the motion vector difference that estimation obtains Difference.
Wherein it is determined that the initial value of the current coded unit is as estimation mistake in reference zone after reference zone Cheng Zhong, reconstructed value of the current coded unit in reference zone, and then matched accordingly.For being transported in reference zone The detailed process of dynamic estimation can be similar to existing mode, and details are not described herein.
105, according to motion vector predictor and motion vector difference, determine the corresponding motion vector of current coded unit.
Wherein, motion vector is equal to the sum of the motion vector predictor and motion vector difference.
106, according to the corresponding motion vector of current coded unit and motion vector difference, current coded unit is compiled Code.
After obtaining the corresponding motion vector of current coded unit and motion vector difference, according to the motion vector and movement arrow The process that amount difference encodes current coded unit is similar to existing mode.
Specifically, the motion vector is actually the current coded unit and match the relative displacement between coding unit, Therefore, motion vector has been actually pointed to a coding unit, i.e. the matching coding unit.Wherein, which is The coding unit similar with the current coded unit matched in motion estimation process.Determine the original of the current coded unit Difference between value and the reconstructed value of the matching coding unit, namely obtained residual error corresponding to the current coded unit, root The coding of current coded unit can be carried out according to residual sum motion vector difference.
In the embodiment of the present application, after the motion vector predictor of current coded unit has been determined, determine with deserve Preceding coding unit carries out containing the current coded unit in matched reference zone, and is assigned with just for the current coded unit Initial value, in this way, even if the motion vector predictor of current coded unit is (0,0), it, also can be to deserve when carrying out matching search The corresponding motion vector predictor of preceding coding unit is starting point, and starting point and the actual value deviation for avoiding motion vector are larger The case where, so as to reduce search duration, reduce the scramble time；Simultaneously as the starting point of motion vector and actual value are inclined Difference reduces, but also the motion vector difference deviation of coding reduces, to reduce encoding code stream rising, also improves coding effect Rate.
It is understood that in practical applications, when the motion vector predictor of the current coded unit be (0,0) or Be only (0,0) when, the search starting point for carrying out motion match be possible to be since current coded unit, therefore, optionally, When the displacement between the motion vector predictor and (0,0) for the current coded unit determined is less than preset value, then true It include the current coded unit in the reference zone made.
In the application any of the above one embodiment, the mode of motion vector predictor is determined for the current coded unit Can there are many.
Optionally, one of mode for determining the motion vector predictor can be with are as follows: by the video frame, compiles currently Nearest one is replicated corresponding to the coding unit that MODE_INTRABC coding mode is encoded using intra block before code unit Motion vector predictor of the motion vector as the current coded unit.Further, if current coded unit it Before, there is no the coding unit using MODE_INTRABC coding mode coding in the video frame, then it can be by the present encoding list The motion vector predictor of member is set as (0,0).
The coding mode of the application is actually also to be improved on MODE_INTRABC coding mode, therefore, should The last coding unit and the current coded unit encoded using the MODE_INTRABC coding mode in video frame With certain similitude, the current coded unit can be predicted by the coding unit.
Optionally, another mode for determining the motion vector predictor can be with are as follows: to the current coded unit phase Motion vector corresponding to adjacent and all coding units for being encoded takes intermediate value, using the intermediate value as the present encoding list The motion vector predictor of member.That is, from all coding units that are adjacent with the current coded unit and being encoded In corresponding motion vector, chosen respectively in intermediate abscissa and in intermediate ordinate, the horizontal seat that will be selected Predicted value of the motion vector that mark and ordinate are constituted as the motion vector of the current coded unit.For example, it is assumed that with deserving Preceding coding unit is adjacent, and there are three the coding units being encoded, the motion vector corresponding to these three be respectively (x1, Y1), (x2, y2) and (x3, y3), wherein x1 > x3 > X2, y1 > y2 > y3, then during x3 is in the abscissa of these three motion vectors Value, and y2 is intermediate value in ordinate, then the motion vector predictor is (x3, y2).
Referring to fig. 2, it illustrates a kind of flow diagrams of another embodiment of the coding method of video frame of the application, originally The method of embodiment may include:
201, obtain current current coded unit to be encoded in video frame.
202, determine the motion vector predictor of the current coded unit.
Any way that the motion vector predictor of current coded unit can be mentioned using the application
203, judge in prescribed coding unit that is adjacent with current coded unit in the video frame and being encoded, if deposit In the coding unit encoded using intra block duplication MODE_INTRABC coding mode, if it is not, then 204 are entered step, If it is, being directly entered step 205；
Wherein, be encoded in the video frame and the coding unit adjacent with the current coded unit can have it is multiple, e.g., According to the cryptoprinciple to video frame, usually according to from left to right, and sequence from top to bottom, it is arranged successively in video frame Coding unit is encoded, in this way, it is adjacent with the current coded unit, and the coding unit being encoded then includes four, such as Shown in Fig. 3, a part of video frame is shown in the Fig. 3, the left side of current coded unit CU1 in figure, upper left side, top With the coding unit in upper right side, i.e. coding unit B1, A1, A2 and A3 is adjacent with current coded unit CU1 and has been encoded Coding unit.
It is understood that the image correlation of adjacent encoder unit is larger, but when current coded unit needs are adopted It is encoded with MODE_INTRABC coding mode, and if the prescribed coding that has been encoded adjacent with the current coded unit Unit is to be encoded using MODE_INTRABC coding mode, then these prescribed coding units and the current coded unit Similitude is lower, then the deviation of the motion vector predictor for the current coded unit that front is predicted is also larger, therefore, in this Shen The judgment step please be increased in embodiment.
Such as, when by the video frame, nearest one is replicated MODE_ using intra block before current coded unit Motion vector corresponding to the coding unit that INTRABC coding mode is encoded is pre- as the motion vector of current coded unit When measured value, since prescribed coding unit adjacent with the current coded unit is not compiled using MODE_INTRABC coding mode Code then illustrates nearest one coding unit and the current coded unit encoded using MODE_INTRABC coding mode Distance farther out, thus the coding list that current coded unit and the last time are encoded using MODE_INTRABC coding mode Similitude between member is relatively low, if the motion vector of the coding unit is pre- as the motion vector of the current coded unit Measured value carries out assignment, then the error of the motion vector predictor can be made larger, and then influence next code precision.
For another example, by motion vector corresponding to all coding units that are adjacent with the current coded unit and being encoded Intermediate value is taken, using the intermediate value of selection as when the motion vector predictor of the current coded unit, also due to adjacent encoder list Member is poor with the similitude of the current coded unit, and causes the error of the motion vector predictor larger.
Wherein, which can be set as needed, such as can will be adjacent with the current coded unit and Coding unit encoded is as specified coding unit.
Optionally, it is contemplated that it is adjacent with current coded unit, and it is located at the coding list on the left of current coded unit with top Member should be located at that current coded unit is upper and the correlation of the coding unit and the current coded unit in left side to be encoded It is relatively large, then it can set the prescribed coding unit and include: adjacent with the current coded unit and be located at the present encoding list The coding unit of first top, and coding unit that is adjacent with the current coded unit and being located on the left of the current coded unit.
204, in prescribed coding unit that is adjacent with the current coded unit in the video frame and being encoded, it is not present When the coding unit encoded using the MODE_INTRABC coding mode, then motion vector predictor is revised as (0,0).
Such as, when the prescribed coding unit be all made of Mode_INTRA coding mode progress coding, then can be by the current volume Code unit motion vector predictor be revised as (0,0), so as to it is subsequent can using current coded unit be search starting point progress With search, search precision is further increased.
205, the reference zone comprising the current coded unit is determined from the video frame, and be the current coded unit point With initial value.
206, according to other volumes except the initial value and current coded unit of current coded unit in the reference zone The reconstructed value of code unit, estimation is carried out in the reference zone, determines the corresponding motion vector difference of the present encoding Value.
207, according to motion vector predictor and motion vector difference, determine the corresponding motion vector of current coded unit.
208, according to the corresponding motion vector of current coded unit and motion vector difference, current coded unit is compiled Code.
In the embodiment of any one coding method of the application, it is contemplated that in the video frame, the current coded unit quilt The reconstructed value of the reconstructed value obtained after coding the coding unit adjacent with the current coded unit is closer to, then ginseng is being determined It, can be according to the reconstructed value of coding unit that is adjacent with the current coded unit and being encoded, for the current volume behind the domain of examination district Code unit distributes initial value.
Optionally, can by the video frame with current coded unit close to and be located at the current coded unit above volume Initial value of the reconstructed value of bottom line as each row of the current coded unit in code unit.It is understood that coding Unit can actually be the difference comprising multiple pixels, these pixels are arranged at ranks, encoded to coding unit Afterwards, each pixel of the coding unit is corresponding with a reconstructed value, correspondingly, being arranged in the coding unit by multiple pixels At row or column also have corresponding reconstructed value.Due to coding unit that is adjacent with the coding unit and being located above the coding unit Closest current coded unit of middle bottom line, it is possible to current using the corresponding reconstructed value of the bottom line as this The initial value of each row of coding unit.That is, the reconstructed value of pixel each in the bottom line is replicated, then according to The secondary point to each row of the current coded unit carries out assignment so that in the current coded unit same row initial value phase Together, and in the every a line of the current coded unit reconstructed value of each point with it is most lower in the coding unit above the current coded unit Each point reconstructed value is identical in a line of face.
Optionally, be also possible to by the video frame with the current coded unit close to and be located at the present encoding list The initial value that the reconstructed value of a most right column is respectively arranged as the current coded unit in the coding unit in first left side.
Optionally, be also possible to first from the video frame with the reference unit close to and the coding unit that has been encoded in Determine a target code unit, which can be for above the current coded unit or the coding in left side Unit.Then can first the abscissa to the corresponding motion vector of target code unit and ordinate it be compared.If the cross Coordinate is greater than ordinate, then by the video frame with the current coded unit close to and to be located at the current coded unit left The initial value that the reconstructed value of the most right column of the coding unit of side is respectively arranged as the current coded unit；If the abscissa is small In the ordinate, then by the video frame with the current coded unit close to and be located above the current coded unit Coding unit most next line initial value of the reconstructed value as each row of the current coded unit；If the abscissa is equal to The ordinate, then according to the reference unit close to and be located at the reference unit above coding unit in most next line In each pixel reconstructed value, and with the reference unit close to and be located at the reference unit on the left of coding unit in most The median of each pixel in one column of the right side, carries out two-dimensional surface interpolation to pixel each in the reference unit, works as described in determination The initial value of preceding coding unit；Wherein, the target code unit is above the current coded unit or left side Coding unit.
In existing coding method, if finally the corresponding motion vector of the calculated current coded unit is (0, 0), then can not continue to encode the current coded unit.Optionally, in the embodiment of the present application, when the present encoding list When the corresponding motion vector of member is (0,0), 0 can be set by the corresponding residual error of the current coded unit.That is, when should When the corresponding motion vector of current coded unit is (0,0), then encoded using jump Skip coding mode, by the current volume The corresponding residual error of code unit is set as zero.Then, it when being encoded to the current coded unit, then can be sweared according to the movement The residual error for measuring difference and the setting, encodes current coded unit.
In order to make it easy to understand, the coding mode of the application is introduced in an optimised manner below.Referring to fig. 4, Show a kind of flow diagram of another embodiment of the coding method of video frame of the application, it is to be understood that the application A kind of only preferred embodiment, but be not unique mode.The method of the present embodiment may include:
401, obtain current current coded unit to be encoded in video frame.
402, by the video frame, nearest one is replicated MODE_INTRABC using intra block before current coded unit Motion-vector prediction of the motion vector corresponding to the coding unit that coding mode is encoded as the current coded unit Value.
403, judge in prescribed coding unit that is adjacent with current coded unit in the video frame and being encoded, if deposit In the coding unit encoded using intra block duplication MODE_INTRABC coding mode, if it is not, then 404 are entered step, If it is, being directly entered step 405；
404, in prescribed coding unit that is adjacent with the current coded unit in video frame and being encoded, there is no adopt When the coding unit encoded with the MODE_INTRABC coding mode, be then revised as the motion vector predictor (0, 0)。
405, the reference zone comprising the current coded unit is determined from the video frame, and be the current coded unit point With initial value.
406, according to other volumes except the initial value and current coded unit of current coded unit in the reference zone The reconstructed value of code unit, estimation is carried out in the reference zone, determines the corresponding motion vector difference of the present encoding.
407, according to motion vector predictor and motion vector difference, determine the corresponding motion vector of current coded unit.
408, it is when the corresponding motion vector of the current coded unit is (0,0), the current coded unit is corresponding residual Difference is set as 0.
409, according to the motion vector difference and residual error, which is encoded.
Certainly, if the motion vector is not (0,0), then coding unit pointed by the motion vector can be first determined Reconstructed value, using the coding unit reconstructed value and the current coded unit original value, determine the current coded unit Residual error, and the calculated residual sum motion vector difference is utilized, which is encoded.
It optionally, can be entropy to the coding of current coded unit in the embodiment of one coding method of any of the above Coding.
In order to which the video frame that the coding method to the video frame using the application is encoded is decoded, the application is also mentioned A kind of coding/decoding method of video frame is supplied.Coding staff of the coding/decoding method of the video frame of the application to the video frame based on the application Method is that the video frame encoded is decoded.By the coding/decoding method, it can guarantee the coding of the video frame using the application Method compress video frame out can receiving end be decoded, to improve the quality of video finally played.
Referring to Fig. 5, it illustrates a kind of flow diagram of coding/decoding method one embodiment of video frame of the application, this realities The method for applying example may include:
501, obtain current current coded unit to be decoded in video frame to be decoded.
In the embodiment of the coding/decoding method of video frame, which is each meant in the video frame to be decoded, Current time needs decoded coding unit.Wherein, the current coded unit is encoded before decoding.
502, determine the motion vector predictor of the current coded unit.
503, which is parsed, the corresponding motion vector difference of the current coded unit is obtained.
It can include the corresponding movement of the coding unit after being encoded to coding unit, in the coding unit after coding Vector.The present encoding is parsed in this step, then can also decode the motion vector difference of the current coded unit Value.
The process parsed to current coded unit can be identical as existing mode, when can such as use entropy decoding, The motion vector difference is decoded in the current coded unit to be decoded from this.
It is understood that the operation order of the step 502 and step 503 is not limited in actual decoding process Shown in Fig. 5, the operation order of the two steps be can be interchanged, and also may be performed simultaneously the operation of the two steps.
504, according to the motion vector difference and motion vector predictor, determine the corresponding movement arrow of the current coded unit Amount.
Wherein, motion vector is equal to the sum of the motion vector difference and the motion vector predictor.
505, when the corresponding motion vector of the current coded unit is (0,0), it is determined that the current coded unit is should The reference unit that motion vector is directed toward distributes initial value for the reference unit, and sets the residual error of the current coded unit as zero.
In decoding process, when determining that the corresponding motion vector of the current coded unit is (0,0), then explanation is to deserving Preceding coding unit is encoded, and in the reference zone carry out estimation when, determine with the current coded unit The position for the reference unit matched is the position of the current coded unit, that is to say, that reference pointed by the motion vector is single Member is the current coded unit.
It is corresponding with the cataloged procedure of the application, if the position for the reference unit that motion vector is directed toward is the present encoding list Position where first then illustrates it is by after for current coded unit distribution initial value, in reference zone in an encoding process It carries out estimation and the current coded unit is determined as the corresponding reference unit of the current coded unit.Correspondingly, decoding In the process, if the reference unit that the corresponding motion vector of the current coded unit is directed toward is the current coded unit, for The reference unit distributes initial value.
Likewise, due in the cataloged procedure of the application, when the corresponding motion vector of the current coded unit is (0,0) When, then the current coding mode is encoded using dancing mode Skip coding mode, i.e., it is the current coded unit is corresponding Residual error be set as zero.Then in decoding process, if the corresponding motion vector of the current coded unit is (0,0), then set The corresponding residual error of the current coded unit is zero.
506, according to the initial value and the residual error of the reference unit, the initial value of the reference unit is determined as the current volume The reconstructed value of code unit.
Since the corresponding residual error of the current coded unit is zero, then the corresponding initial value of the reference unit is the current volume The reconstructed value of code unit.
The coding method to the video frame of the application may be implemented by the coding/decoding method of the video frame of the embodiment of the present application It encodes out video frame to be decoded, to guarantee that the video flowing after coding can be by normal play, simultaneously because using the application Coding method video frame is encoded, encoding precision and code efficiency can be improved so that be conducive to improve decoding The quality of video out.
Further, in the embodiment of the present application, when the corresponding motion vector of the current coded unit is not (0,0), When then being parsed to current coded unit, while in addition to obtaining the current coded unit corresponding motion vector difference, also The corresponding residual error of the available current coded unit.
Correspondingly, after determining the corresponding motion vector of the current coded unit, further includes: determine the motion vector institute The reference unit of direction, and obtain the reconstructed value of the reference unit decoded.
It, can be according to the reconstructed value and the solution of the reference unit then in the reconstructed value for determining the current coded unit The residual error of precipitation constructs the reconstructed value of the current coded unit.
In the coding/decoding method of the application, the process and volume of the initial motion vectors predicted value of the current decoding unit are determined Determine that the mode of the corresponding initial motion vectors predicted value of the current coded unit is similar during code.
Optionally, a kind of mode can by the video frame, in this prior before coding unit nearest one decode Motion vector corresponding to coding unit using intra block duplication MODE_INTRABC coding mode coding is as described current The motion vector predictor of coding unit.
Optionally, another way can be to all coding units that are adjacent with the current coded unit and being encoded Corresponding motion vector takes intermediate value, using the intermediate value as the motion vector predictor of the current coded unit.
Referring to Fig. 6, it illustrates a kind of flow diagrams of another embodiment of the coding/decoding method of video frame of the application, originally Application embodiment method may include:
601, obtain current current coded unit to be decoded in video frame to be decoded.
602, when adjacent with the current coded unit in video frame and in decoded prescribed coding unit, there is no adopt When the coding unit encoded with the MODE_INTRABC coding mode, then the motion vector predictor of the current coded unit is set It is set to (0,0).
In coding/decoding method in the present embodiment, before determining the motion vector predictor of the current coded unit, also It needs to judge in the video frame, with the presence or absence of using in and the prescribed coding unit that has been encoded adjacent with the current coded unit The coding unit of MODE_INTRABC coding mode coding.If there is no the MODE_INTRABC to compile in the designating unit The coding unit of pattern coding, then determine the motion vector predictor of current coded unit using mentioned-above mode, Meeting is therefore, corresponding with coding method so that the error of the motion vector predictor is larger, can be current by this in this kind of situation The motion vector predictor of coding unit is set as (0,0).
Wherein, which can be adjacent with the current coded unit and is located at decoded coding unit In it is any one or more.Optionally, which is and position adjacent with the current coded unit in the video frame Above current coded unit and the decoded coding unit in left side.
603, which is parsed, the corresponding motion vector difference of the current coded unit is obtained.
604, according to the motion vector difference and motion vector predictor, determine the corresponding movement arrow of the current coded unit Amount.
605, when the corresponding motion vector of the current coded unit is (0,0), it is determined that the current coded unit is should The reference unit that motion vector is directed toward distributes initial value for the reference unit, and sets the residual error of the current coded unit as zero.
606, according to the initial value and the residual error of the reference unit, the initial value of the reference unit is determined as the current volume The reconstructed value of code unit.
Certainly, can also include: in the present embodiment when in the prescribed coding unit exist use the MODE_ It, then will be adjacent with the current coded unit and decoded any one when the coding unit of INTRABC coding mode coding Motion vector predictor of the motion vector corresponding to a coding unit as the current coded unit；Alternatively, by the view In frequency frame, the use intra block duplication MODE_INTRABC that nearest one decodes before the current coded unit encodes mould Motion vector predictor of the motion vector as the current coded unit corresponding to the coding unit of formula coding.
Certainly, in the embodiment of the present application, the movement of the mentioned-above determination current coded unit can also first be used The mode of vector predictor determines the motion vector predictor, then judges again in the video frame, with the current coded unit With the presence or absence of the coding using MODE_INTRABC coding mode coding in the adjacent and prescribed coding unit that has been encoded Unit.If will be determined in the designating unit there is no the coding unit using MODE_INTRABC coding mode coding Motion vector predictor out is revised as (0,0)
It is corresponding with coding method, it, can foundation in the embodiment of the coding/decoding method of the application any one video frame Adjacent with the current coded unit and decoded coding unit reconstructed value distributes initial value for the reference unit.
Optionally, a kind of mode determining the initial value can be with are as follows: by the video frame with the reference unit close to and position Initial value of the reconstructed value of most next line as each row of the reference unit in coding unit above the reference unit.
Optionally, another mode for determining the initial value can be with are as follows: by the video frame with the reference unit close to and The initial value that the reconstructed value of a most right column is respectively arranged as the reference unit in the coding unit on the left of the reference unit.
Optionally, be also possible to first from the video frame with the reference unit close to and in decoded coding unit really A fixed target code unit, the target code unit can be for above the current coded units or the coding list in left side Member.Then can first the abscissa to the corresponding motion vector of target code unit and ordinate it be compared.If the cross Coordinate be greater than the ordinate, then by the video frame with the reference unit close to and be located at the reference unit left compile The reconstructed value of the most right column of code unit is as the reconstructed value respectively arranged in the reference unit；If the abscissa is less than described vertical Coordinate, then by the video frame with the reference unit close to and be located at the reference unit above coding unit it is most next Reconstructed value of the capable reconstructed value as each row in the reference unit；If the abscissa is equal to the ordinate, basis With the reference unit close to and the coding unit that is located above the reference unit in most next line each pixel reconstruction Value, and with the reference unit close to and be located at the reference unit on the left of coding unit in most it is right one column in each pixel Reconstructed value, to pixel each in the reference unit carry out two-dimensional surface interpolation, determine the reconstructed value of the reference unit； Wherein, the target code unit is above the current coded unit or the coding unit in left side.
A kind of coding method of video frame of corresponding the application, present invention also provides a kind of code devices of video frame. Referring to Fig. 7, a kind of structural schematic diagram of code device one embodiment of video frame of the application, the device of the present embodiment are shown May include:
Acquiring unit 701, for obtaining current current coded unit to be encoded in video frame；
Vector prediction unit 702, for determining the motion vector predictor of the current coded unit；
Reference zone determination unit 703, for determining the reference comprising the current coded unit from the video frame Region, and initial value is distributed for the current coded unit；
Motion estimation unit 704, for according to the initial value of current coded unit in the reference zone and current volume The reconstructed value of other coding units except code unit, carries out estimation in the reference zone, determines described current Encode corresponding motion vector difference；
Vector determination unit 705, described in determining according to the motion vector predictor and the motion vector difference The corresponding motion vector of current coded unit；
Coding unit 706 is used for according to the corresponding motion vector of the current coded unit and the motion vector difference, The current coded unit is encoded.
Optionally, in the embodiment of the code device of the application another video frame, which can also include:
Prediction modification unit, for before the reference zone determination unit determines the reference zone, if described In video frame in and the prescribed coding unit that has been encoded adjacent with the current coded unit, there is no replicated using intra block When the coding unit that MODE_INTRABC coding mode is encoded, then the motion vector predictor is revised as (0,0).
Wherein, which can be adjacent with the current coded unit in video frame and be located at the current volume Coding unit above code unit with left side.
Optionally, in the code device of the video frame of the application, the coding unit in the code device may include:
Residual error setup unit is used for when the corresponding motion vector of the current coded unit is (0,0), will be described current The corresponding residual error of coding unit is set as 0；
Coded sub-units, for being carried out to the current coded unit according to the motion vector difference and the residual error Coding.
In the code device of any of the above one embodiment, which may include:
First vector prediction unit, for being adopted for nearest one before the current coded unit by the video frame Motion vector corresponding to the coding unit for using MODE_INTRABC coding mode to be encoded is as the current coded unit Motion vector predictor；
Alternatively, the second vector prediction unit, for by all volumes that are adjacent with the current coded unit and being encoded Motion vector corresponding to code unit takes intermediate value, using the intermediate value as the motion vector predictor of the current coded unit.
In the code device of any of the above one embodiment, the reference zone determination unit may include:
First reference zone determination unit, for determining the reference comprising the current coded unit from the video frame Region, by the video frame with the current coded unit close to and be located at the current coded unit above coding unit In most next line initial value of the reconstructed value as each row of the current coded unit；
Alternatively, the second reference zone determination unit, includes the current coded unit for determining from the video frame Reference zone, by the video frame with the current coded unit close to and be located at the current coded unit on the left of volume The initial value that the reconstructed value of a most right column is respectively arranged as the current coded unit in code unit；
Alternatively, third reference zone determination unit, for by the video frame with the current coded unit close to and The abscissa and ordinate for the target code unit motion vector being encoded are compared, if the abscissa is greater than described Ordinate, then by the video frame with the current coded unit close to and be located at the current coded unit on the left of coding The initial value that the reconstructed value of the most right column of unit is respectively arranged as the current coded unit；If the abscissa is less than described vertical Coordinate, then by the video frame with the current coded unit close to and be located at the current coded unit above coding list Initial value of the reconstructed value of first most next line as each row of the current coded unit；If the abscissa is equal to the vertical seat Mark, then according to the reference unit close to and the coding unit that is located above the reference unit in each pixel in most next line Point reconstructed value, and with the reference unit close to and be located at the reference unit on the left of coding unit in most it is right one column in The median of each pixel carries out two-dimensional surface interpolation to pixel each in the reference unit, determines the present encoding list The initial value of member；Wherein, the target code unit is above the current coded unit or the coding unit in left side.
A kind of coding/decoding method of video frame of corresponding the application, present invention also provides a kind of decoding apparatus of video frame.
Referring to Fig. 8, it illustrates a kind of structural schematic diagram of decoding apparatus one embodiment of video frame of the application, this realities The device for applying example may include:
Acquiring unit 801, for obtaining current current coded unit to be decoded in video frame to be decoded；
Predicting unit 802, for determining the motion vector predictor of the current coded unit；
It is corresponding to obtain the current coded unit for parsing to the current coded unit for resolution unit 803 Motion vector difference；
Vector determination unit 804, described in determining according to the motion vector difference and the motion vector predictor The corresponding motion vector of current coded unit；
With reference to determination unit 805, for when the corresponding motion vector of the current coded unit is (0,0), it is determined that The current coded unit is the reference unit that the motion vector is directed toward, and distributes initial value for the reference unit, and set The residual error of the current coded unit is zero；
Decoding unit 806, for according to the reference unit initial value and the residual error, will the reference unit just Initial value is determined as the reconstructed value of the current coded unit.
Optionally, in another embodiment of the decoding apparatus of the application, which may include:
First resolution unit, for by the video frame, nearest one to be decoded before the current coded unit Using intra block duplication MODE_INTRABC coding mode coding coding unit corresponding to motion vector be used as described in work as The motion vector predictor of preceding coding unit.
Optionally, in another embodiment of the decoding apparatus in the application, the predicting unit, comprising:
First predicting unit, for when adjacent with the current coded unit in the video frame and decoded specified In coding unit, there is no when the coding unit encoded using the MODE_INTRABC coding mode, then the movement is sweared Amount predicted value is set as (0,0).
Further, first predicting unit may include:
First prediction subelement, for working as adjacent with the current coded unit in the video frame and being located at described current In the decoded coding unit in above coding unit and left side, there is no using the MODE_INTRABC coding mode into When the coding unit of row coding, the motion vector predictor is set as (0,0).
Optionally, on the basis of the decoding apparatus includes first predicting unit, which can also include:
Second predicting unit uses the MODE_INTRABC coding mode for working as to exist in the prescribed coding unit When the coding unit of coding, then to fortune corresponding to adjacent with the current coded unit and decoded all coding units Dynamic vector takes intermediate value, using the intermediate value as the motion vector predictor of the current coded unit；
Alternatively, third predicting unit, is compiled for working as to exist in the prescribed coding unit using the MODE_INTRABC When the coding unit of pattern coding, by the video frame, nearest one is decoded before the current coded unit Motion vector corresponding to coding unit using MODE_INTRABC coding mode coding is as the present encoding list The motion vector predictor of member.
Optionally, it is the reference that this, which refers to determination unit, in the embodiment of one decoding apparatus of the application any of the above Unit distributes initial value
By in the video frame with the reference unit close to and be located at the reference unit above coding unit in most Initial value of the reconstructed value of next line as each row of the reference unit；
Alternatively, by the video frame with the reference unit close to and be located at the reference unit on the left of coding unit In a most right column the initial value that is respectively arranged as the reference unit of reconstructed value；
Alternatively, by the video frame with the reference unit close to and decoded target code unit motion vector Abscissa and ordinate be compared, if the abscissa be greater than the ordinate, by the video frame with it is described Reference unit close to and be located at reference unit left coding unit most it is right one column reconstructed value as in the reference unit The reconstructed value respectively arranged；If the abscissa be less than the ordinate, by the video frame with the reference unit close to And reconstruction of the reconstructed value of the coding unit most next line above the reference unit as each row in the reference unit Value；If the abscissa be equal to the ordinate, according to the reference unit close to and be located at the reference unit on In the coding unit of side in most next line each pixel reconstructed value, and with the reference unit close to and be located at the reference In coding unit on the left of unit most it is right one column in each pixel reconstructed value, to pixel each in the reference unit carry out two Dimensional plane interpolation determines the reconstructed value of the reference unit；Wherein, the target code unit is positioned at the present encoding The coding unit of unit top or left side.
Optionally, in the embodiment of any one decoding apparatus of the application, when the corresponding fortune of the current coded unit When dynamic vector is not (0,0), which parses the current coded unit, obtains the current coded unit pair While the motion vector difference answered, the corresponding residual error of the current coded unit is also obtained；
Then decoding unit, comprising:
Reference information acquiring unit for determining reference unit pointed by the motion vector, and is obtained and to be decoded The reconstructed value of the reference unit；
Decoding subunit is worked as described in building for the reconstructed value and the residual error parsed according to the reference unit The reconstructed value of preceding coding unit.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part It is bright.
The foregoing description of the disclosed embodiments makes professional and technical personnel in the field can be realized or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the application.Therefore, the application It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one The widest scope of cause.

Claims (17)

1. a kind of coding/decoding method of video frame characterized by comprising
Obtain current current coded unit to be decoded in video frame to be decoded；
Determine the motion vector predictor of the current coded unit；
The current coded unit is parsed, the corresponding motion vector difference of the current coded unit is obtained；
According to the motion vector difference and the motion vector predictor, the corresponding movement arrow of the current coded unit is determined Amount；
When the corresponding motion vector of the current coded unit is (0,0), it is determined that the current coded unit is the fortune Moving vector be directed toward reference unit, it is adjacent according to the current coded unit and decoded unit be the reference unit divide With initial value, and the residual error of the current coded unit is set as zero；
The initial value of the reference unit is determined as the current volume by initial value and the residual error according to the reference unit The reconstructed value of code unit；
The motion vector predictor of the determination current coded unit, comprising:
When adjacent with the current coded unit in the video frame and in decoded prescribed coding unit, there is no use When the coding unit of MODE_INTRABC coding mode coding, then the motion vector predictor is set as (0,0)；When specified It is when there is the coding unit using MODE_INTRABC coding mode coding in coding unit, then adjacent for current coded unit And motion vector corresponding to decoded all coding units takes intermediate value, using the intermediate value as the current coded unit Motion vector predictor；Alternatively, by video frame before current coded unit nearest one decode use MODE_ Motion-vector prediction of the motion vector as current coded unit corresponding to the coding unit of INTRABC coding mode coding Value.
2. the method according to claim 1, wherein it is described in the video frame with the current coded unit Adjacent and in decoded prescribed coding unit, there is no the volumes encoded using the MODE_INTRABC coding mode Code unit, comprising:
When it is adjacent with the current coded unit in the video frame and be located above the current coded unit and left side In decoded coding unit, there is no the coding units encoded using the MODE_INTRABC coding mode.
3. the method according to claim 1, wherein further include:
It is when there is the coding unit using MODE_INTRABC coding mode coding in the prescribed coding unit, then right Motion vector corresponding to adjacent with the current coded unit and decoded all coding units takes intermediate value, in described It is worth the motion vector predictor as the current coded unit；Alternatively, by the video frame, in the current coded unit Movement corresponding to nearest one coding unit using MODE_INTRABC coding mode coding decoded is sweared before Measure the motion vector predictor as the current coded unit.
4. the method according to claim 1, wherein described distribute initial value for the reference unit, comprising:
By in the video frame with the reference unit close to and be located at the reference unit above coding unit in it is most next Initial value of the capable reconstructed value as each row in the reference unit；
Alternatively, by the video frame with the reference unit close to and be located at the reference unit on the left of coding unit in most The reconstructed value of one column of the right side is as the initial value respectively arranged in the reference unit；
Alternatively, by the video frame with the reference unit close to and the cross of decoded target code unit motion vector Coordinate and ordinate are compared, if the abscissa be greater than the ordinate, by the video frame with the reference Unit close to and be located at the reconstructed value of the most right column of reference unit left coding unit as respectively arranging in the reference unit Reconstructed value；If the abscissa be less than the ordinate, by the video frame with the reference unit close to and position Reconstructed value of the reconstructed value of coding unit most next line above the reference unit as each row in the reference unit；Such as Abscissa described in fruit be equal to the ordinate, then according to the reference unit close to and be located at the reference unit above volume In code unit in most next line each pixel reconstructed value, and with the reference unit close to and to be located at the reference unit left In the coding unit of side most it is right one column in each pixel reconstructed value, to pixel each in the reference unit carry out two-dimensional surface Interpolation determines the reconstructed value of the reference unit；Wherein, the target code unit is on the current coded unit The coding unit of side or left side.
5. the method according to claim 1, wherein when the corresponding motion vector of the current coded unit is not When (0,0), then the current coded unit is parsed, obtains the corresponding motion vector difference of the current coded unit Meanwhile also obtaining the corresponding residual error of the current coded unit；
After then determining the corresponding motion vector of the current coded unit, further includes: determine pointed by the motion vector Reference unit, and obtain the reconstructed value of the reference unit decoded；
According to the reconstructed value of the reference unit and the residual error parsed, the reconstructed value of the current coded unit is constructed.
6. a kind of coding method of video frame characterized by comprising
Obtain current current coded unit to be encoded in video frame；
Determine the motion vector predictor of the current coded unit；
The reference zone comprising the current coded unit is determined from the video frame, and according to the current coded unit phase It is adjacent and decoded unit be the current coded unit distribute initial value；
According to other coding units except the initial value and current coded unit of current coded unit in the reference zone Reconstructed value, estimation is carried out in the reference zone, determine the corresponding motion vector difference of the present encoding and Residual error；
According to the motion vector predictor and the motion vector difference, the corresponding movement arrow of the current coded unit is determined Amount；
According to the corresponding motion vector of the current coded unit and the residual error, the current coded unit is encoded；
From the video frame where current coded unit, before determining the reference zone comprising the current coded unit, go back Include:
In prescribed coding unit that is adjacent with the current coded unit in the video frame and being encoded, there is no use When the coding unit that intra block duplication MODE_INTRABC coding mode is encoded, then the motion vector predictor is modified For (0,0)；The corresponding residual error of the current coded unit is zero；It is compiled when existing in prescribed coding unit using MODE_INTRABC When the coding unit of pattern coding, then corresponding to adjacent for current coded unit and decoded all coding units Motion vector takes intermediate value, using the intermediate value as the motion vector predictor of the current coded unit；Alternatively, by video frame Nearest one coding unit using MODE_INTRABC coding mode coding decoded is right before current coded unit Motion vector predictor of the motion vector answered as current coded unit.
7. according to the method described in claim 6, it is characterized in that, described according to the motion vector and the residual error, to institute Current coded unit is stated to be encoded, comprising:
When the corresponding motion vector of the current coded unit is (0,0), the corresponding residual error of the current coded unit is set It is set to 0；
According to the motion vector and the residual error, the current coded unit is encoded.
8. according to the method described in claim 6, it is characterized in that, the motion vector of the determination current coded unit is pre- Measured value, comprising:
By in the video frame, nearest one is carried out using MODE_INTRABC coding mode before the current coded unit Motion vector predictor of the motion vector corresponding to the coding unit of coding as the current coded unit；
Alternatively, during motion vector corresponding to all coding units that are adjacent with the current coded unit and being encoded is taken Value, using the intermediate value as the motion vector predictor of the current coded unit.
9. according to the method described in claim 6, it is characterized in that, described distribute initial value, packet for the current coded unit It includes:
By in the video frame with the current coded unit close to and be located at the current coded unit above coding unit In most next line initial value of the reconstructed value as each row in the current coded unit；
Alternatively, by the video frame with the current coded unit close to and be located at the current coded unit on the left of coding The reconstructed value of a most right column is as the initial value respectively arranged in the current coded unit in unit；
Alternatively, by the video frame with the current coded unit close to and the target code unit motion vector that has been encoded Abscissa and ordinate be compared, if the abscissa be greater than the ordinate, by the video frame with it is described Current coded unit close to and be located at the current coded unit on the left of coding unit most it is right one column reconstructed value be used as described in The initial value that current coded unit respectively arranges；If the abscissa be less than the ordinate, by the video frame with it is described Current coded unit close to and be located at the current coded unit above coding unit most next line reconstructed value be used as described in The initial value of each row of current coded unit；If the abscissa is equal to the ordinate, according to tight with the reference unit In the adjacent and coding unit that is located above the reference unit in most next line each pixel reconstructed value, and with the reference Unit close to and be located at the reference unit on the left of coding unit in most it is right one column in each pixel median, to the ginseng It examines each pixel in unit and carries out two-dimensional surface interpolation, determine the initial value of the current coded unit；Wherein, the target is compiled Code unit is above the current coded unit or the coding unit in left side.
10. a kind of decoding apparatus of video frame characterized by comprising
Acquiring unit, for obtaining current current coded unit to be decoded in video frame to be decoded；
Predicting unit, for determining the motion vector predictor of the current coded unit；
Resolution unit obtains the corresponding movement arrow of the current coded unit for parsing to the current coded unit Measure difference；
Vector determination unit, for determining the current volume according to the motion vector difference and the motion vector predictor The corresponding motion vector of code unit；
With reference to determination unit, for when the corresponding motion vector of the current coded unit is (0,0), it is determined that described current Coding unit is the reference unit that the motion vector is directed toward, and decoded unit adjacent according to the current coded unit Initial value is distributed for the reference unit, and sets the residual error of the current coded unit as zero；
Decoding unit, for according to the reference unit initial value and the residual error, the initial value of the reference unit is true It is set to the reconstructed value of the current coded unit；
The predicting unit, comprising:
First predicting unit, for adjacent with the current coded unit in the video frame and decoded prescribed coding In unit, there is no using MODE_INTRABC coding mode coding coding unit when, then by the motion vector predictor It is set as (0,0).
11. device according to claim 10, which is characterized in that first predicting unit, comprising:
First prediction subelement, for working as adjacent with the current coded unit in the video frame and being located at the present encoding Above unit and in the decoded coding unit in left side, there is no compiled using the MODE_INTRABC coding mode When the coding unit of code, the motion vector predictor is set as (0,0).
12. device according to claim 10, which is characterized in that further include:
Second predicting unit is encoded for working as to exist in the prescribed coding unit using the MODE_INTRABC coding mode Coding unit when, then to movement corresponding to adjacent with the current coded unit and decoded all coding units swear Intermediate value is measured, using the intermediate value as the motion vector predictor of the current coded unit；
Alternatively, third predicting unit, encodes mould using the MODE_INTRABC for working as to exist in the prescribed coding unit When the coding unit of formula coding, by the video frame, a nearest use decoded before the current coded unit Motion vector corresponding to the coding unit of the MODE_INTRABC coding mode coding is as the current coded unit Motion vector predictor.
13. device according to claim 10, which is characterized in that the reference determination unit is reference unit distribution Initial value includes:
By in the video frame with the reference unit close to and be located at the reference unit above coding unit in it is most next Initial value of the capable reconstructed value as each row of the reference unit；
Alternatively, by the video frame with the reference unit close to and be located at the reference unit on the left of coding unit in most The initial value that the reconstructed value of one column of the right side is respectively arranged as the reference unit；
Alternatively, by the video frame with the reference unit close to and the cross of decoded target code unit motion vector Coordinate and ordinate are compared, if the abscissa be greater than the ordinate, by the video frame with the reference Unit close to and be located at the reconstructed value of the most right column of reference unit left coding unit as respectively arranging in the reference unit Reconstructed value；If the abscissa be less than the ordinate, by the video frame with the reference unit close to and position Reconstructed value of the reconstructed value of coding unit most next line above the reference unit as each row in the reference unit；Such as Abscissa described in fruit be equal to the ordinate, then according to the reference unit close to and be located at the reference unit above volume In code unit in most next line each pixel reconstructed value, and with the reference unit close to and to be located at the reference unit left In the coding unit of side most it is right one column in each pixel reconstructed value, to pixel each in the reference unit carry out two-dimensional surface Interpolation determines the reconstructed value of the reference unit；Wherein, the target code unit is on the current coded unit The coding unit of side or left side.
14. a kind of code device of video frame characterized by comprising
Acquiring unit, for obtaining current current coded unit to be encoded in video frame；
Vector prediction unit, for determining the motion vector predictor of the current coded unit；
Reference zone determination unit, for determining the reference zone comprising the current coded unit from the video frame, and It is adjacent according to the current coded unit and decoded unit be the current coded unit distribute initial value；
Motion estimation unit, for according to the initial value of current coded unit in the reference zone and current coded unit it The reconstructed value of other outer coding units carries out estimation in the reference zone, determines that the present encoding is corresponding Motion vector difference and residual error；
Vector determination unit, for determining the current volume according to the motion vector predictor and the motion vector difference The corresponding motion vector of code unit；
Coding unit is used for according to the corresponding motion vector of the current coded unit and the residual error, to the present encoding Unit is encoded；
Further include:
Prediction modification unit, for before the reference zone determination unit determines the reference zone, if the video In frame in and the prescribed coding unit that has been encoded adjacent with the current coded unit, there is no replicated using intra block When the coding unit that MODE_INTRABC coding mode is encoded, then the motion vector predictor is revised as (0,0)；Institute Stating the corresponding residual error of current coded unit is zero；It is encoded when existing in prescribed coding unit using MODE_INTRABC coding mode Coding unit when, then motion vector corresponding to adjacent for current coded unit and decoded all coding units takes Intermediate value, using the intermediate value as the motion vector predictor of the current coded unit；Alternatively, by video frame in present encoding Movement corresponding to nearest one coding unit using MODE_INTRABC coding mode coding decoded is sweared before unit Measure the motion vector predictor as current coded unit.
15. device according to claim 14, which is characterized in that the coding unit, comprising:
Residual error setup unit is used for when the corresponding motion vector of the current coded unit is (0,0), by the present encoding The corresponding residual error of unit is set as 0；
Coded sub-units, for being encoded to the current coded unit according to the motion vector and the residual error.
16. device according to claim 14, which is characterized in that the vector prediction unit, comprising:
First vector prediction unit, for by the video frame, nearest one to be used before the current coded unit Motion vector corresponding to the coding unit that MODE_INTRABC coding mode is encoded is as the current coded unit Motion vector predictor；
Alternatively, the second vector prediction unit, for by all coding lists that are adjacent with the current coded unit and being encoded Motion vector corresponding to member takes intermediate value, using the intermediate value as the motion vector predictor of the current coded unit.
17. device according to claim 14, which is characterized in that the reference zone determination unit, comprising:
First reference zone determination unit, for determining the reference area comprising the current coded unit from the video frame Domain, by the video frame with the current coded unit close to and be located at the current coded unit above coding unit in Initial value of the reconstructed value of most next line as each row of the current coded unit；
Alternatively, the second reference zone determination unit, for determining the ginseng comprising the current coded unit from the video frame Examination district domain, by the video frame with the current coded unit close to and be located at the current coded unit on the left of coding list The initial value that the reconstructed value of a most right column is respectively arranged as the current coded unit in member；
Alternatively, third reference zone determination unit, for by the video frame with the current coded unit close to and by The abscissa and ordinate of the target code unit motion vector of coding are compared, if the abscissa is greater than the vertical seat Mark, then by the video frame with the current coded unit close to and be located at the current coded unit on the left of coding unit The initial value that the reconstructed value of a most right column is respectively arranged as the current coded unit；If the abscissa is less than the vertical seat Mark, then by the video frame with the current coded unit close to and be located at the current coded unit above coding unit Initial value of the reconstructed value of most next line as each row of the current coded unit；If the abscissa is equal to the vertical seat Mark, then according to the reference unit close to and the coding unit that is located above the reference unit in each pixel in most next line Point reconstructed value, and with the reference unit close to and be located at the reference unit on the left of coding unit in most it is right one column in The median of each pixel carries out two-dimensional surface interpolation to pixel each in the reference unit, determines the present encoding list The initial value of member；Wherein, the target code unit is above the current coded unit or the coding unit in left side.
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