CN102843561B - Inter frame image predicts reference frame number decoding method and the codec of encoding and decoding - Google Patents
Inter frame image predicts reference frame number decoding method and the codec of encoding and decoding Download PDFInfo
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Abstract
The invention discloses a kind of inter frame image predicts reference frame number decoding method and the codec of encoding and decoding, including the reference frame SEQ.XFER method of inter frame image predictive coding：Current prediction unit is carried out with estimation, obtains the optimum reference frame of current prediction unit；Calculate the maximum of probability reference frame of current prediction unit；If described maximum of probability reference frame is identical with described optimum reference frame it indicates that described maximum of probability reference frame is identical with described optimum reference frame, and terminates reference frame SEQ.XFER；If described maximum of probability reference frame is different from described optimum reference frame, then indicate that described maximum of probability reference frame is different from described optimum reference frame, and after the residual values of the sequence number to described maximum of probability reference frame and the sequence number of described optimum reference frame encode, terminate reference frame SEQ.XFER.To existing inter frame image, the present invention predicts that the reference frame number encoding and decoding in encoding and decoding are improved, improve the efficiency that inter frame image predicts encoding and decoding.
Description
Technical field
The present invention relates to the prediction of image/video encoding and decoding and inter frame image electric powder prediction, more particularly, to inter frame image is compiled
The reference frame number decoding method of decoding and codec.
Background technology
Image/video compression coding and decoding is generally divided into inter frame image encoding and decoding and two kinds of predictions of I picture encoding and decoding to compile
Decoding technique.I picture coding/decoding is using the information from present frame coding/decoding elementary area to current coding/decoding
Elementary area is predicted coding/decoding.Inter frame image coding/decoding is using having completed the image frame information of coding/decoding to current
Coding/decoding image is predicted coding/decoding.
In existing inter frame image decoding method, during to carrying out encoding and decoding with reference to frame number, directly to reference to frame number
Value is encoded, and inter frame image predicts the inefficient of encoding and decoding.
Content of the invention
The embodiment of the present invention provides a kind of reference frame SEQ.XFER method of inter frame image predictive coding, in order to improve interframe
The efficiency of image forecasting encoding, the method includes：
Current prediction unit is carried out with estimation, obtains the optimum reference frame of current prediction unit；
Calculate the maximum of probability reference frame of current prediction unit；
If the sequence number of described maximum of probability reference frame identical with the sequence number of described optimum reference frame it indicates that described the most general
Rate reference frame is identical with described optimum reference frame, and terminates reference frame SEQ.XFER；
If the sequence number of described maximum of probability reference frame different from the sequence number of described optimum reference frame it indicates that described the most general
Rate reference frame is different from described optimum reference frame, and in the sequence number to described maximum of probability reference frame and described optimum reference frame
After the residual values of sequence number are encoded, terminate reference frame SEQ.XFER.
The embodiment of the present invention also provides the reference frame number coding/decoding method in a kind of inter frame image prediction decoding, in order to improve
The efficiency of inter frame image prediction decoding, the method includes：
Decoding determines the optimum reference frame whether phase of maximum of probability reference frame and the current prediction unit of current prediction unit
With；
Calculate described maximum of probability reference frame；
If the sequence number of described maximum of probability reference frame identical with the sequence number of described optimum reference frame it is determined that described the most general
Rate reference frame is described optimum reference frame；
If the sequence number of described maximum of probability reference frame is different from the sequence number of described optimum reference frame, described in decoding acquisition
The residual values of the sequence number of maximum probability reference frame and the sequence number of described optimum reference frame, and according to described residual values and described the most general
Rate reference frame obtains described optimum reference frame.
The embodiment of the present invention also provides a kind of video encoder, and in order to improve the efficiency of inter frame image predictive coding, this regards
Frequency encoder includes：
Motion estimation module, for current prediction unit is carried out with estimation, obtains the optimum ginseng of current prediction unit
Examine frame；
Computing module, for calculating the maximum of probability reference frame of current prediction unit；
Coded treatment module is identical with the sequence number of described optimum reference frame for the sequence number in described maximum of probability reference frame
When, indicate that described maximum of probability reference frame is identical with described optimum reference frame, and terminate reference frame SEQ.XFER；In described maximum
When the sequence number of probability reference frame is different from the sequence number of described optimum reference frame, indicate described maximum of probability reference frame and described optimum
Reference frame is different, and the residual values in the sequence number to described maximum of probability reference frame and the sequence number of described optimum reference frame are compiled
After code, terminate reference frame SEQ.XFER.
The embodiment of the present invention also provides a kind of Video Decoder, and in order to improve the efficiency of inter frame image prediction decoding, this regards
Frequency decoder includes：
Determining module, determines the maximum of probability reference frame of current prediction unit and the optimum of current prediction unit for decoding
Whether reference frame is identical；
Computing module, for calculating described maximum of probability reference frame；
Decoding process module is identical with the sequence number of described optimum reference frame for the sequence number in described maximum of probability reference frame
When, determine that described maximum of probability reference frame is described optimum reference frame；Described maximum of probability reference frame sequence number with described
When the sequence number of excellent reference frame is different, decoding obtains sequence number and the sequence number of described optimum reference frame of described maximum of probability reference frame
Residual values, and obtain described optimum reference frame according to described residual values and described maximum of probability reference frame.
The reference frame SEQ.XFER of the inter frame image predictive coding of the embodiment of the present invention, moves to current prediction unit
Estimate, obtain the optimum reference frame of current prediction unit；Calculate the maximum of probability reference frame of current prediction unit；If described maximum
Probability reference frame is identical with described optimum reference frame it indicates that described maximum of probability reference frame is identical with described optimum reference frame,
And terminate reference frame SEQ.XFER；If described maximum of probability reference frame different from described optimum reference frame it indicates that described maximum
Probability reference frame is different from described optimum reference frame, and in the sequence number to described maximum of probability reference frame and described optimum reference frame
Sequence number residual values encoded after, terminate reference frame SEQ.XFER；Thus the reference to existing inter frame image predictive coding
Frame number coding is improved, and improves the efficiency of inter frame image predictive coding.
Reference frame number decoding in the inter frame image prediction decoding of the embodiment of the present invention, decoding determines current prediction unit
Maximum of probability reference frame whether identical with the optimum reference frame of current prediction unit；Calculate described maximum of probability reference frame；If
Described maximum of probability reference frame is identical with described optimum reference frame it is determined that described maximum of probability reference frame is the reference of described optimum
Frame；If described maximum of probability reference frame is different from described optimum reference frame, decoding obtains the sequence of described maximum of probability reference frame
Residual values number with the sequence number of described optimum reference frame, and according to described residual values and described maximum of probability reference frame obtain
Optimum reference frame；Thus being improved to the reference frame number decoding in existing inter frame image prediction decoding, improve interframe
The efficiency of image prediction decoding.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, also may be used
So that other accompanying drawings are obtained according to these accompanying drawings.In the accompanying drawings：
Fig. 1 is the process chart of the reference frame SEQ.XFER method of inter frame image predictive coding in the embodiment of the present invention；
Fig. 2 is that in the embodiment of the present invention, current prediction unit is illustrated with the position of neighboring reference unit and with reference to frame number
Figure；
Fig. 3 is the handling process of the reference frame number coding/decoding method in inter frame image prediction decoding in the embodiment of the present invention
Figure；
Fig. 4 is the structural representation of video encoder in the embodiment of the present invention；
Fig. 5 is the structural representation of Video Decoder in the embodiment of the present invention.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention become more apparent, below in conjunction with the accompanying drawings to this
Bright embodiment is described in further details.Here, the schematic description and description of the present invention is used for explaining the present invention, but simultaneously
Not as a limitation of the invention.
As shown in figure 1, in the embodiment of the present invention, the processing stream of the reference frame SEQ.XFER method of inter frame image predictive coding
Journey can include：
Step 101, estimation that current prediction unit (Prediction Unit, PU) is carried out, obtain current predictive list
The optimum reference frame of unit；
Step 102, calculate current prediction unit maximum of probability reference frame (Most Probable Reference,
MPR)；
If step 103 described maximum of probability reference frame is with described optimum reference frame is identical (is represented by MPR==current
PU optimum reference frame) it indicates that described maximum of probability reference frame is identical with described optimum reference frame, and terminate to compile with reference to frame number
Code；If described maximum of probability reference frame is from described optimum reference frame is different (is represented by MPR！=current PU optimum reference frame),
Then indicate described maximum of probability reference frame from described optimum reference frame different, and the sequence number to described maximum of probability reference frame with
After the residual values of the sequence number of described optimum reference frame are encoded, terminate reference frame SEQ.XFER.
Flow process is it is known that the reference frame SEQ.XFER of the inter frame image predictive coding of the embodiment of the present invention as shown in Figure 1,
The reference frame SEQ.XFER of existing inter frame image predictive coding is improved, is improve the effect of inter frame image predictive coding
Rate.
When being embodied as, the maximum of probability reference frame calculating current prediction unit can have various ways.For example, it is possible to
In the reference frame of neighboring reference unit of current prediction unit, selecting with reference to the minimum reference frame of frame number is described maximum of probability
Reference frame；And for example, can select with reference to frame number ginseng placed in the middle in the reference frame of the neighboring reference unit of current prediction unit
Examining frame is described maximum of probability reference frame；And for example, can be according to the neighboring reference list of current prediction unit and current prediction unit
The size of unit, in the reference frame of the neighboring reference unit of current prediction unit, selects described maximum of probability reference frame；And for example,
Can be in the reference frame of the neighboring reference unit of current prediction unit, selection usage frequency highest reference frame is described maximum
Probability reference frame.
Fig. 2 is for the position of current prediction unit and neighboring reference unit and with reference to frame number schematic diagram.Fig. 2 includes currently
Predicting unit (Current PU), neighboring reference unit (PU_A, PU_B, PU_C, PU_D, PU_E).The reference of wherein each unit
Frame number includes ref_idx_l0, ref_idx_l1 and ref_idx_lc.
Wherein, in the reference frame of the neighboring reference unit of current prediction unit, select with reference to the minimum reference of frame number
Frame is described maximum of probability reference frame, can be expressed as：MPR=min (ref_idx_lx (A) ..., ref_idx_lx (E)), its
Middle ref_idx_lx (A) ..., ref_idx_lx (E) all includes reference frame number ref_idx_l0, ref_idx_ of corresponding unit
L1 and ref_idx_lc.
In the reference frame of the neighboring reference unit of current prediction unit, selecting with reference to frame number reference frame placed in the middle is institute
State maximum of probability reference frame, can be expressed as：MPR=median (ref_idx_lx (A) ..., ref_idx_lx (E)), wherein
Ref_idx_lx (A) ..., ref_idx_lx (E) all includes reference frame number ref_idx_l0, ref_idx_l1 of corresponding unit
And ref_idx_lc.
In the reference frame of the neighboring reference unit of current prediction unit, usage frequency highest reference frame is selected to be described
Maximum of probability reference frame, can be expressed as：MPR=mostFreqUsed (ref_idx_lx (A) ..., ref_idx_lx (E)),
Wherein ref_idx_lx (A) ..., ref_idx_lx (E) all includes reference frame number ref_idx_l0, ref_ of corresponding unit
Idx_l1 and ref_idx_lc.
When being embodied as, according to the size of current prediction unit and the neighboring reference unit of current prediction unit, current
In the reference frame of neighboring reference unit of predicting unit, select described maximum of probability reference frame, can include：
According to the number of pixels in current prediction unit, determine the size of current prediction unit；
According to the number of pixels in the neighboring reference unit of current prediction unit, determine the neighboring reference of current prediction unit
The size of unit；
Wherein, number of pixels is directly proportional to cell size that is to say, that pixel is more, and unit is bigger；Pixel is fewer, single
Unit is less.
In Fig. 2, Current PU includes 4N × 4N pixel, and PU_A includes 2N × 2N pixel, and PU_B includes 2N × N number of
Pixel, PU_C include N × 2N pixel, PU_D includes 2N × 2N pixel, PU_E includes 2N × 4N pixel.
When being embodied as, according to the size of current prediction unit and the neighboring reference unit of current prediction unit, current
In the reference frame of neighboring reference unit of predicting unit, select described maximum of probability reference frame, can include：
Select from the neighboring reference unit of current prediction unit：The reference that size is more than or equal to current prediction unit is single
Unit；Or, size is less than or equal to the reference unit of current prediction unit, or, size is set one with the difference of current prediction unit
In the range of reference unit；
The reference frame of the reference unit of selection is defined as described maximum of probability reference frame.
Wherein, reference unit in a set point for the difference of size and current prediction unit, for example, can include：?
Size and current prediction unit size identical reference unit in horizontal direction and/or vertical direction.
When being embodied as, indicate that described maximum of probability reference frame is identical with described optimum reference frame, can include：By maximum
Probability is set to 1 with reference to frame identification；Indicate that described maximum of probability reference frame is different from described optimum reference frame, can include：Will
Maximum probability is set to 0 with reference to frame identification.Maximum of probability can be carried out according to actual needs with reference to the setting of frame identification concrete numerical value, this
1, the 0 of place is only one, can certainly be set to other values in enforcement, to indicate maximum of probability reference frame and optimum reference frame phase
Same or different.
Maximum of probability can be designated as mpr_flag_lx with reference to frame identification during enforcement, if described maximum of probability reference frame with
Described optimum reference frame is identical, then mpr_flag_lx is set to 1, and terminates reference frame SEQ.XFER；If described maximum of probability ginseng
Examine frame different from described optimum reference frame, then mpr_flag_lx be set to 0, first to the sequence number of described maximum of probability reference frame with
The residual values of the sequence number of described optimum reference frame are encoded, then terminate reference frame SEQ.XFER.Wherein reference frame SEQ.XFER
Process also include, setting mpr_flag_lx value after, the value of mpr_flag_lx is encoded.
When being embodied as, due to there is one-to-one relation with reference to frame number and reference frame, therefore judge described maximum
Whether probability reference frame is identical with described optimum reference frame, can be according to the sequence number of described maximum of probability reference frame and described optimum
The sequence number of reference frame whether identical carrying out.If that is, the sequence number of described maximum of probability reference frame and the reference of described optimum
The sequence number of frame is identical then it represents that described maximum of probability reference frame is identical with described optimum reference frame；If described maximum of probability reference
The sequence number of frame from described optimum reference frame sequence number different then it represents that described maximum of probability reference frame with described optimum reference frame not
With.
The reference frame SEQ.XFER method of the inter frame image predictive coding of the embodiment of the present invention, in HEVC (High
Efficienc y Video Coding, high efficiency coding and decoding video) there is the corresponding grammer to predicting unit in working draft
Modification (synt ax modification), concrete modification as shown in table 1, has marked modification row, modification part will be former in table
The coding with reference to frame number is had to be changed to the coding with reference to frame number based on maximum of probability.Identify maximum of probability reference frame sequence first
Number whether optimum with current prediction unit with reference to frame number identical (mpr_flag_lc [x0] [y0]), if it is different, then coding is worked as
The optimum residual values (rem_ref_idx_lc [x0] [y0]) with reference to frame number and maximum of probability reference frame number of front predicting unit；
If identical, do not need any operation.
Table 1 predicting unit grammar correction
The reference frame number coding/decoding method in a kind of inter frame image prediction decoding is additionally provided in the embodiment of the present invention, as follows
Described in the embodiment in face.Principle and interframe due to the reference frame number coding/decoding method solve problem in inter frame image prediction decoding
The reference frame SEQ.XFER method of image forecasting encoding is similar, the reference frame number decoding side therefore in inter frame image prediction decoding
The enforcement of method may refer to the enforcement of the reference frame SEQ.XFER method of inter frame image predictive coding, repeats no more in place of repetition.
As shown in figure 3, the process of the reference frame number coding/decoding method in the inter frame image prediction decoding of the embodiment of the present invention
Flow process can include：
Step 301, decoding determine the maximum of probability reference frame of current prediction unit and the optimum reference of current prediction unit
Whether frame is identical；
Step 302, the described maximum of probability reference frame of calculating；
If step 303 described maximum of probability reference frame identical with described optimum reference frame it is determined that described maximum of probability ginseng
Examining frame is described optimum reference frame；If described maximum of probability reference frame is different from described optimum reference frame, decoding obtains described
The residual values of the sequence number of the sequence number of maximum of probability reference frame and described optimum reference frame, and according to described residual values and described maximum
Probability reference frame obtains described optimum reference frame.
Flow process is it is known that reference frame number solution in the inter frame image prediction decoding of the embodiment of the present invention as shown in Figure 3
Code, is improved to the reference frame number decoding in existing inter frame image prediction decoding, is improve inter frame image prediction decoding
Efficiency.
When being embodied as, calculate described maximum of probability reference frame, can include：
In the reference frame of the neighboring reference unit of current prediction unit, selecting with reference to the minimum reference frame of frame number is institute
State maximum of probability reference frame；
Or, in the reference frame of the neighboring reference unit of current prediction unit, selecting with reference to frame number reference frame placed in the middle
For described maximum of probability reference frame；
Or, according to the size of current prediction unit and the neighboring reference unit of current prediction unit, in current prediction unit
The reference frame of neighboring reference unit in, select described maximum of probability reference frame；
Or, in the reference frame of the neighboring reference unit of current prediction unit, selection usage frequency highest reference frame is
Described maximum of probability reference frame.
When being embodied as, according to the size of current prediction unit and the neighboring reference unit of current prediction unit, current
In the reference frame of neighboring reference unit of predicting unit, select described maximum of probability reference frame, can include：
According to the number of pixels in current prediction unit, determine the size of current prediction unit；
According to the number of pixels in the neighboring reference unit of current prediction unit, determine the neighboring reference of current prediction unit
The size of unit；
Wherein, number of pixels is directly proportional to cell size.
When being embodied as, according to the size of current prediction unit and the neighboring reference unit of current prediction unit, current
In the reference frame of neighboring reference unit of predicting unit, select described maximum of probability reference frame, can include：
Select from the neighboring reference unit of current prediction unit：The reference that size is more than or equal to current prediction unit is single
Unit；Or, size is less than or equal to the reference unit of current prediction unit, or, size is set one with the difference of current prediction unit
In the range of reference unit；
The reference frame of the reference unit of selection is defined as described maximum of probability reference frame.
When being embodied as, the difference of the size and current prediction unit reference unit in a set point, can include：
Size and current prediction unit size identical reference unit in the horizontal direction and/or on vertical direction.
When being embodied as, decoding determines the maximum of probability reference frame of current prediction unit and the optimum ginseng of current prediction unit
Whether identical examine frame, can include：
If the maximum of probability reference frame that decoding obtains is designated 1 it is determined that described maximum of probability reference frame and described optimum
Reference frame is identical；
If the maximum of probability reference frame that decoding obtains is designated 0 it is determined that described maximum of probability reference frame and described optimum
Reference frame is different.
A kind of video encoder and Video Decoder is additionally provided, as described in the following examples in the embodiment of the present invention.
Because the principle of video encoder and Video Decoder solve problem predicts that with inter frame image the reference frame number in encoding and decoding is compiled
Coding/decoding method is similar, and the enforcement of therefore video encoder and Video Decoder may refer to inter frame image and predicts the ginseng in encoding and decoding
Examine the enforcement of frame number decoding method, repeat no more in place of repetition.
As shown in figure 4, the video encoder in the embodiment of the present invention can include：
Motion estimation module 401, for current prediction unit is carried out with estimation, obtains the optimum of current prediction unit
Reference frame；
Computing module 402, for calculating the maximum of probability reference frame of current prediction unit；
Coded treatment module 403, for when described maximum of probability reference frame is identical with described optimum reference frame, indicating institute
State maximum of probability reference frame identical with described optimum reference frame, and terminate reference frame SEQ.XFER；In described maximum of probability reference
When frame is different from described optimum reference frame, indicate that described maximum of probability reference frame is different from described optimum reference frame, and to institute
After the residual values of the sequence number and the sequence number of described optimum reference frame of stating maximum of probability reference frame are encoded, terminate with reference to frame number
Coding.
In one embodiment, computing module 402 can include：
First computing unit, for, in the reference frame of the neighboring reference unit of current prediction unit, selecting reference frame sequence
Number minimum reference frame is described maximum of probability reference frame；
Or, the second computing unit, for, in the reference frame of the neighboring reference unit of current prediction unit, selecting reference frame
Sequence number reference frame placed in the middle is described maximum of probability reference frame；
Or, the 3rd computing unit, for big according to current prediction unit and the neighboring reference unit of current prediction unit
Little, in the reference frame of the neighboring reference unit of current prediction unit, select described maximum of probability reference frame；
Or, the 4th computing unit, for, in the reference frame of the neighboring reference unit of current prediction unit, selecting using frequency
Rate highest reference frame is described maximum of probability reference frame.
In one embodiment, the 3rd computing unit specifically can be used for：
According to the number of pixels in current prediction unit, determine the size of current prediction unit；
According to the number of pixels in the neighboring reference unit of current prediction unit, determine the neighboring reference of current prediction unit
The size of unit；
Wherein, number of pixels is directly proportional to cell size.
In one embodiment, the 3rd computing unit specifically can be used for：
Select from the neighboring reference unit of current prediction unit：The reference that size is more than or equal to current prediction unit is single
Unit；Or, size is less than or equal to the reference unit of current prediction unit, or, size is set one with the difference of current prediction unit
In the range of reference unit；
The reference frame of the reference unit of selection is defined as described maximum of probability reference frame.
In one embodiment, the 3rd computing unit specifically can be used for：
Select from the neighboring reference unit of current prediction unit：In the horizontal direction and/or on vertical direction size with work as
Front predicting unit size identical reference unit.
In one embodiment, coded treatment module 403 specifically can be used for：
Maximum of probability is set to 1 with reference to frame identification, to indicate described maximum of probability reference frame and described optimum reference frame phase
With；
Maximum of probability is set to 0 with reference to frame identification, to indicate described maximum of probability reference frame with described optimum reference frame not
With.
As shown in figure 5, the Video Decoder in the embodiment of the present invention can include：
Determining module 501, determines maximum of probability reference frame and the current prediction unit of current prediction unit for decoding
Whether optimum reference frame is identical；
Computing module 502, for calculating described maximum of probability reference frame；
Decoding process module 503, for when described maximum of probability reference frame is identical with described optimum reference frame, determining institute
Stating maximum of probability reference frame is described optimum reference frame；When described maximum of probability reference frame is different from described optimum reference frame,
Decoding obtains the sequence number of described maximum of probability reference frame and the residual values of the sequence number of described optimum reference frame, and according to described residual error
Value and described maximum of probability reference frame obtain described optimum reference frame.
In one embodiment, described computing module 502 can include：
First computing unit, for, in the reference frame of the neighboring reference unit of current prediction unit, selecting reference frame sequence
Number minimum reference frame is described maximum of probability reference frame；
Or, the second computing unit, for, in the reference frame of the neighboring reference unit of current prediction unit, selecting reference frame
Sequence number reference frame placed in the middle is described maximum of probability reference frame；
Or, the 3rd computing unit, for big according to current prediction unit and the neighboring reference unit of current prediction unit
Little, in the reference frame of the neighboring reference unit of current prediction unit, select described maximum of probability reference frame；
Or, the 4th computing unit, for, in the reference frame of the neighboring reference unit of current prediction unit, selecting using frequency
Rate highest reference frame is described maximum of probability reference frame.
In one embodiment, described 3rd computing unit specifically can be used for：
According to the number of pixels in current prediction unit, determine the size of current prediction unit；
According to the number of pixels in the neighboring reference unit of current prediction unit, determine the neighboring reference of current prediction unit
The size of unit；
Wherein, number of pixels is directly proportional to cell size.
In one embodiment, described 3rd computing unit specifically can be used for：
Select from the neighboring reference unit of current prediction unit：The reference that size is more than or equal to current prediction unit is single
Unit；Or, size is less than or equal to the reference unit of current prediction unit, or, size is set one with the difference of current prediction unit
In the range of reference unit；
The reference frame of the reference unit of selection is defined as described maximum of probability reference frame.
In one embodiment, described 3rd computing unit specifically can be used for：
Select from the neighboring reference unit of current prediction unit：In the horizontal direction and/or on vertical direction size with work as
Front predicting unit size identical reference unit.
In one embodiment, determining module 501 specifically can be used for：
When the maximum of probability reference frame obtaining in decoding is designated 1, determine described maximum of probability reference frame and described optimum
Reference frame is identical；
When the maximum of probability reference frame obtaining in decoding is designated 0, determine described maximum of probability reference frame and described optimum
Reference frame is different.
In sum, the reference frame SEQ.XFER of the inter frame image predictive coding of the embodiment of the present invention, to current predictive list
Unit carries out estimation, obtains the optimum reference frame of current prediction unit；Calculate the maximum of probability reference frame of current prediction unit；
If described maximum of probability reference frame is identical with described optimum reference frame it indicates that described maximum of probability reference frame is joined with described optimum
Examine frame identical, and terminate reference frame SEQ.XFER；If described maximum of probability reference frame from described optimum reference frame different it indicates that
Described maximum of probability reference frame from described optimum reference frame different, and the sequence number to described maximum of probability reference frame with described
After the residual values of the sequence number of excellent reference frame are encoded, terminate reference frame SEQ.XFER；Compile thus predicting to existing inter frame image
The reference frame SEQ.XFER of code is improved, and improves the efficiency of inter frame image predictive coding.
Reference frame number decoding in the inter frame image prediction decoding of the embodiment of the present invention, decoding determines current prediction unit
Maximum of probability reference frame whether identical with the optimum reference frame of current prediction unit；Calculate described maximum of probability reference frame；If
Described maximum of probability reference frame is identical with described optimum reference frame it is determined that described maximum of probability reference frame is the reference of described optimum
Frame；If described maximum of probability reference frame is different from described optimum reference frame, decoding obtains the sequence of described maximum of probability reference frame
Residual values number with the sequence number of described optimum reference frame, and according to described residual values and described maximum of probability reference frame obtain
Optimum reference frame；Thus being improved to the reference frame number decoding in existing inter frame image prediction decoding, improve interframe
The efficiency of image prediction decoding.
Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the present invention can be using complete hardware embodiment, complete software embodiment or the reality combining software and hardware aspect
Apply the form of example.And, the present invention can be using in one or more computers wherein including computer usable program code
The upper computer program implemented of usable storage medium (including but not limited to disk memory, CD-ROM, optical memory etc.) produces
The form of product.
The present invention is the flow process with reference to method according to embodiments of the present invention, equipment (system) and computer program
Figure and/or block diagram are describing.It should be understood that can be by each stream in computer program instructions flowchart and/or block diagram
Flow process in journey and/or square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processor instructing general purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device is to produce
A raw machine is so that produced for reality by the instruction of computer or the computing device of other programmable data processing device
The device of the function of specifying in present one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions may be alternatively stored in and can guide computer or other programmable data processing device with spy
Determine in the computer-readable memory that mode works so that the instruction generation inclusion being stored in this computer-readable memory refers to
Make the manufacture of device, this command device realize in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or
The function of specifying in multiple square frames.
These computer program instructions also can be loaded in computer or other programmable data processing device so that counting
On calculation machine or other programmable devices, execution series of operation steps to be to produce computer implemented process, thus in computer or
On other programmable devices, the instruction of execution is provided for realizing in one flow process of flow chart or multiple flow process and/or block diagram one
The step of the function of specifying in individual square frame or multiple square frame.
Particular embodiments described above, has carried out detailed further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail bright, be should be understood that the specific embodiment that the foregoing is only the present invention, the guarantor being not intended to limit the present invention
Shield scope, all any modification, equivalent substitution and improvement within the spirit and principles in the present invention, done etc., should be included in this
Within the protection domain of invention.
Claims (24)
1. a kind of reference frame SEQ.XFER method of inter frame image predictive coding is it is characterised in that the method includes：
Current prediction unit is carried out with estimation, obtains the optimum reference frame of current prediction unit；
Calculate the maximum of probability reference frame of current prediction unit；
If the sequence number of described maximum of probability reference frame identical with the sequence number of described optimum reference frame it indicates that described maximum of probability ginseng
Examine frame identical with described optimum reference frame, and terminate reference frame SEQ.XFER；
If the sequence number of described maximum of probability reference frame different from the sequence number of described optimum reference frame it indicates that described maximum of probability ginseng
Examine frame from described optimum reference frame different, and the sequence number to described maximum of probability reference frame with described optimum reference frame sequence number
Residual values encoded after, terminate reference frame SEQ.XFER.
2. the method for claim 1 it is characterised in that calculate current prediction unit maximum of probability reference frame, including：
In the reference frame of the neighboring reference unit of current prediction unit, select with reference to the minimum reference frame of frame number be described
Maximum probability reference frame；
Or, in the reference frame of the neighboring reference unit of current prediction unit, selecting with reference to frame number reference frame placed in the middle is institute
State maximum of probability reference frame；
Or, according to the size of current prediction unit and the neighboring reference unit of current prediction unit, in the phase of current prediction unit
In the reference frame of adjacent reference unit, select described maximum of probability reference frame；
Or, in the reference frame of the neighboring reference unit of current prediction unit, selecting usage frequency highest reference frame to be described
Maximum of probability reference frame.
3. method as claimed in claim 2 is it is characterised in that the described phase according to current prediction unit and current prediction unit
The size of adjacent reference unit, in the reference frame of the neighboring reference unit of current prediction unit, selects described maximum of probability reference
Frame, including：
According to the number of pixels in current prediction unit, determine the size of current prediction unit；
According to the number of pixels in the neighboring reference unit of current prediction unit, determine the neighboring reference unit of current prediction unit
Size；
Wherein, number of pixels is directly proportional to cell size.
4. method as claimed in claim 2 is it is characterised in that the described phase according to current prediction unit and current prediction unit
The size of adjacent reference unit, in the reference frame of the neighboring reference unit of current prediction unit, selects described maximum of probability reference
Frame, including：
Select from the neighboring reference unit of current prediction unit：Size is more than or equal to the reference unit of current prediction unit；Or,
Size is less than or equal to the reference unit of current prediction unit, or, the difference of size and current prediction unit is in a set point
Reference unit；
The reference frame of the reference unit of selection is defined as described maximum of probability reference frame.
5. method as claimed in claim 4 is it is characterised in that described size sets model with the difference of current prediction unit one
Reference unit in enclosing, including：
Size and current prediction unit size identical reference unit in the horizontal direction and/or on vertical direction.
6. the method for claim 1 is it is characterised in that described instruction described maximum of probability reference frame is joined with described optimum
Examine frame identical, including：Maximum of probability is set to 1 with reference to frame identification；
The described maximum of probability reference frame of described instruction is different from described optimum reference frame, including：By maximum of probability with reference to frame identification
It is set to 0.
7. the reference frame number coding/decoding method in a kind of inter frame image prediction decoding is it is characterised in that the method includes：
Decoding determines whether the maximum of probability reference frame of current prediction unit is identical with the optimum reference frame of current prediction unit；
Calculate described maximum of probability reference frame；
If the sequence number of described maximum of probability reference frame identical with the sequence number of described optimum reference frame it is determined that described maximum of probability ginseng
Examining frame is described optimum reference frame；
If the sequence number of described maximum of probability reference frame is different from the sequence number of described optimum reference frame, the most general described in decoding acquisition
The residual values of the sequence number of the sequence number of rate reference frame and described optimum reference frame, and according to described residual values and described maximum of probability ginseng
Examine frame and obtain described optimum reference frame.
8. method as claimed in claim 7 is it is characterised in that described calculating described maximum of probability reference frame, including：
In the reference frame of the neighboring reference unit of current prediction unit, select with reference to the minimum reference frame of frame number be described
Maximum probability reference frame；
Or, in the reference frame of the neighboring reference unit of current prediction unit, selecting with reference to frame number reference frame placed in the middle is institute
State maximum of probability reference frame；
Or, according to the size of current prediction unit and the neighboring reference unit of current prediction unit, in the phase of current prediction unit
In the reference frame of adjacent reference unit, select described maximum of probability reference frame；
Or, in the reference frame of the neighboring reference unit of current prediction unit, selecting usage frequency highest reference frame to be described
Maximum of probability reference frame.
9. method as claimed in claim 8 is it is characterised in that the described phase according to current prediction unit and current prediction unit
The size of adjacent reference unit, in the reference frame of the neighboring reference unit of current prediction unit, selects described maximum of probability reference
Frame, including：
According to the number of pixels in current prediction unit, determine the size of current prediction unit；
According to the number of pixels in the neighboring reference unit of current prediction unit, determine the neighboring reference unit of current prediction unit
Size；
Wherein, number of pixels is directly proportional to cell size.
10. method as claimed in claim 8 it is characterised in that described according to current prediction unit and current prediction unit
The size of neighboring reference unit, in the reference frame of the neighboring reference unit of current prediction unit, selects described maximum of probability ginseng
Examine frame, including：
Select from the neighboring reference unit of current prediction unit：Size is more than or equal to the reference unit of current prediction unit；Or,
Size is less than or equal to the reference unit of current prediction unit, or, the difference of size and current prediction unit is in a set point
Reference unit；
The reference frame of the reference unit of selection is defined as described maximum of probability reference frame.
11. methods as claimed in claim 10 are it is characterised in that described size is set one with the difference of current prediction unit
In the range of reference unit, including：
Size and current prediction unit size identical reference unit in the horizontal direction and/or on vertical direction.
12. methods as claimed in claim 7 are it is characterised in that decoding determines the maximum of probability reference frame of current prediction unit
Whether identical with the optimum reference frame of current prediction unit, including：
If decoding obtain maximum of probability reference frame be designated 1 it is determined that described maximum of probability reference frame with described optimum reference
Frame is identical；
If decoding obtain maximum of probability reference frame be designated 0 it is determined that described maximum of probability reference frame with described optimum reference
Frame is different.
A kind of 13. video encoders are it is characterised in that include：
Motion estimation module, for current prediction unit is carried out with estimation, obtains the optimum reference frame of current prediction unit；
Computing module, for calculating the maximum of probability reference frame of current prediction unit；
Coded treatment module, for described maximum of probability reference frame sequence number with described optimum reference frame sequence number identical when,
Indicate that described maximum of probability reference frame is identical with described optimum reference frame, and terminate reference frame SEQ.XFER；Described the most general
When the sequence number of rate reference frame is different from the sequence number of described optimum reference frame, indicate described maximum of probability reference frame and described optimum ginseng
Examine frame difference, and the residual values in the sequence number to described maximum of probability reference frame and the sequence number of described optimum reference frame encode
Afterwards, terminate reference frame SEQ.XFER.
14. video encoders as claimed in claim 13 are it is characterised in that described computing module includes：
First computing unit, for, in the reference frame of the neighboring reference unit of current prediction unit, selecting with reference to frame number
Little reference frame is described maximum of probability reference frame；
Or, the second computing unit, for, in the reference frame of the neighboring reference unit of current prediction unit, selecting with reference to frame number
Reference frame placed in the middle is described maximum of probability reference frame；
Or, the 3rd computing unit, for the size according to current prediction unit and the neighboring reference unit of current prediction unit,
In the reference frame of neighboring reference unit of current prediction unit, select described maximum of probability reference frame；
Or, the 4th computing unit, for, in the reference frame of the neighboring reference unit of current prediction unit, selecting usage frequency
High reference frame is described maximum of probability reference frame.
15. video encoders as claimed in claim 14 it is characterised in that described 3rd computing unit specifically for：
According to the number of pixels in current prediction unit, determine the size of current prediction unit；
According to the number of pixels in the neighboring reference unit of current prediction unit, determine the neighboring reference unit of current prediction unit
Size；
Wherein, number of pixels is directly proportional to cell size.
16. video encoders as claimed in claim 14 it is characterised in that described 3rd computing unit specifically for：
Select from the neighboring reference unit of current prediction unit：Size is more than or equal to the reference unit of current prediction unit；Or,
Size is less than or equal to the reference unit of current prediction unit, or, the difference of size and current prediction unit is in a set point
Reference unit；
The reference frame of the reference unit of selection is defined as described maximum of probability reference frame.
17. video encoders as claimed in claim 16 it is characterised in that described 3rd computing unit specifically for：
Select from the neighboring reference unit of current prediction unit：In the horizontal direction and/or on vertical direction size with currently pre-
Survey cell size identical reference unit.
18. video encoders as claimed in claim 13 it is characterised in that described coded treatment module specifically for：
Maximum of probability is set to 1 with reference to frame identification, identical with described optimum reference frame to indicate described maximum of probability reference frame；
Maximum of probability is set to 0 with reference to frame identification, different from described optimum reference frame to indicate described maximum of probability reference frame.
A kind of 19. Video Decoders are it is characterised in that include：
Determining module, determines the maximum of probability reference frame of current prediction unit and the optimum reference of current prediction unit for decoding
Whether frame is identical；
Computing module, for calculating described maximum of probability reference frame；
Decoding process module, for described maximum of probability reference frame sequence number with described optimum reference frame sequence number identical when,
Determine that described maximum of probability reference frame is described optimum reference frame；Sequence number and described optimum ginseng in described maximum of probability reference frame
Examine frame sequence number different when, decoding obtains the sequence number of described maximum of probability reference frame and the residual error of the sequence number of described optimum reference frame
Value, and obtain described optimum reference frame according to described residual values and described maximum of probability reference frame.
20. Video Decoders as claimed in claim 19 are it is characterised in that described computing module includes：
First computing unit, for, in the reference frame of the neighboring reference unit of current prediction unit, selecting with reference to frame number
Little reference frame is described maximum of probability reference frame；
Or, the second computing unit, for, in the reference frame of the neighboring reference unit of current prediction unit, selecting with reference to frame number
Reference frame placed in the middle is described maximum of probability reference frame；
Or, the 3rd computing unit, for the size according to current prediction unit and the neighboring reference unit of current prediction unit,
In the reference frame of neighboring reference unit of current prediction unit, select described maximum of probability reference frame；
Or, the 4th computing unit, for, in the reference frame of the neighboring reference unit of current prediction unit, selecting usage frequency
High reference frame is described maximum of probability reference frame.
21. Video Decoders as claimed in claim 20 it is characterised in that described 3rd computing unit specifically for：
According to the number of pixels in current prediction unit, determine the size of current prediction unit；
According to the number of pixels in the neighboring reference unit of current prediction unit, determine the neighboring reference unit of current prediction unit
Size；
Wherein, number of pixels is directly proportional to cell size.
22. Video Decoders as claimed in claim 20 it is characterised in that described 3rd computing unit specifically for：
Select from the neighboring reference unit of current prediction unit：Size is more than or equal to the reference unit of current prediction unit；Or,
Size is less than or equal to the reference unit of current prediction unit, or, the difference of size and current prediction unit is in a set point
Reference unit；
The reference frame of the reference unit of selection is defined as described maximum of probability reference frame.
23. Video Decoders as claimed in claim 22 it is characterised in that described 3rd computing unit specifically for：
Select from the neighboring reference unit of current prediction unit：In the horizontal direction and/or on vertical direction size with currently pre-
Survey cell size identical reference unit.
24. Video Decoders as claimed in claim 19 it is characterised in that described determining module specifically for：
When the maximum of probability reference frame obtaining in decoding is designated 1, determine described maximum of probability reference frame and the reference of described optimum
Frame is identical；
When the maximum of probability reference frame obtaining in decoding is designated 0, determine described maximum of probability reference frame and the reference of described optimum
Frame is different.
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