CN102843554A - Interframe image prediction encoding and decoding methods and video encoding and decoding device - Google Patents
Interframe image prediction encoding and decoding methods and video encoding and decoding device Download PDFInfo
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Abstract
The invention discloses interframe image prediction encoding and decoding methods and a video encoding and decoding device. The interframe image prediction encoding method comprises the steps of: obtaining optimal movement data of a current prediction unit in a current encoding frame, wherein the optimal movement data includes an optimal movement vector and an optical reference frame number; selecting optimal prediction data from the prediction data of the optimal movement data; obtaining a residual signal of the optimal movement data, and encoding the residual signal; and encoding the number of the optimal prediction data. According to the invention, encoding and decoding on the reference frame number on the basis of the predicted residual is introduced to the interframe image prediction encoding and decoding, so that the interframe image prediction encoding and decoding efficiencies are improved.
Description
Technical field
The present invention relates to image/video encoding and decoding and inter frame image electric powder prediction, relate in particular to inter frame image prediction decoding method and Video Codec.
Background technology
The image/video compression coding and decoding is divided into inter frame image encoding and decoding and two kinds of predictions of I picture encoding and decoding encoding and decoding technique generally.The I picture coding/decoding be used to from present frame the information of coding/decoding elementary area current coding/decoding elementary area is predicted coding/decoding.The utilization of inter frame image coding/decoding has been accomplished the image frame information of coding/decoding current coding/decoding image has been predicted coding/decoding.
In the existing inter frame image coding/decoding method motion vector is predicted, the residual signals of motion vector is encoded that the efficient of inter frame image prediction encoding and decoding is not high.
Summary of the invention
The embodiment of the invention provides a kind of inter frame image predictive coding method, and in order to improve inter frame image predictive coding efficient, this method comprises:
Obtain the optimal motion data of current predicting unit in the current encoded frame, said optimal motion data comprise optimal motion vector and optimum reference frame sequence number;
In the prediction data of said optimal motion data, select the optimum prediction data;
Obtain the residual signals of said optimal motion data, said residual signals is encoded;
Numbering to said optimum prediction data is encoded.
The embodiment of the invention also provides a kind of inter frame image prediction decoding method, and in order to improve inter frame image prediction decoding efficient, this method comprises:
Decoding obtains the residual signals of the exercise data of current predicting unit in the current decoded frame and the numbering of prediction data, and said exercise data comprises motion vector and reference frame sequence number;
According to the numbering of said prediction data, obtain said prediction data;
According to said prediction data and said residual signals, obtain said exercise data.
The embodiment of the invention also provides a kind of video encoder, and in order to improve inter frame image predictive coding efficient, this video encoder comprises:
Obtain module, be used for obtaining the optimal motion data of the current predicting unit of current encoded frame, said optimal motion data comprise optimal motion vector and optimum reference frame sequence number;
Select module, be used for selecting the optimum prediction data in the prediction data of said optimal motion data;
First coding module is used to obtain the residual signals of said optimal motion data, and said residual signals is encoded;
Second coding module is used for the numbering of said optimum prediction data is encoded.
The embodiment of the invention also provides a kind of Video Decoder, and in order to improve inter frame image prediction decoding efficient, this Video Decoder comprises:
Decoder module, the residual signals of the exercise data that obtains the current predicting unit of current decoded frame of being used for decoding and the numbering of prediction data, said exercise data comprises motion vector and reference frame sequence number;
Prediction data obtains module, is used for the numbering according to said prediction data, obtains said prediction data;
Exercise data obtains module, is used for obtaining said exercise data according to said prediction data and said residual signals.
In the embodiment of the invention, obtain the optimal motion data of current predicting unit in the current encoded frame, said optimal motion data comprise optimal motion vector and optimum reference frame sequence number; In the prediction data of said optimal motion data, select the optimum prediction data; Obtain the residual signals of said optimal motion data, said residual signals is encoded; Numbering to said optimum prediction data is encoded; Thereby in the inter frame image predictive coding, introduced the coding of reference frame sequence number, improved inter frame image predictive coding efficient based on prediction residual.
In the embodiment of the invention, decoding obtains the residual signals of the exercise data of current predicting unit in the current decoded frame and the numbering of prediction data, and said exercise data comprises motion vector and reference frame sequence number; According to the numbering of said prediction data, obtain said prediction data; According to said prediction data and said residual signals, obtain said exercise data; Thereby in the inter frame image prediction decoding, introduced of the decoding of reference frame sequence number, improved inter frame image prediction decoding efficient based on prediction residual.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.In the accompanying drawings:
Fig. 1 is the process chart of inter frame image predictive coding method in the embodiment of the invention;
Fig. 2 is the process chart of inter frame image prediction decoding method in the embodiment of the invention;
Fig. 3 is the structural representation of video encoder in the embodiment of the invention;
Fig. 4 is the structural representation of the instantiation of video encoder in the embodiment of the invention;
Fig. 5 is the structural representation of Video Decoder in the embodiment of the invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention is clearer, the embodiment of the invention is explained further details below in conjunction with accompanying drawing.At this, illustrative examples of the present invention and explanation thereof are used to explain the present invention, but not as to qualification of the present invention.
As shown in Figure 1, in the embodiment of the invention, the handling process of inter frame image predictive coding method can comprise:
The optimal motion data of current predicting unit in step 101, the acquisition current encoded frame, said optimal motion data comprise optimal motion vector and optimum reference frame sequence number;
The residual signals of step 103, the said optimal motion data of acquisition is encoded to said residual signals;
Can learn that by flow process shown in Figure 1 in the embodiment of the invention, obtain the optimal motion data of current predicting unit in the current encoded frame, said optimal motion data comprise optimal motion vector and optimum reference frame sequence number; In the prediction data of said optimal motion data, select the optimum prediction data; Obtain the residual signals of said optimal motion data, said residual signals is encoded; Numbering to said optimum prediction data is encoded; Thereby in the inter frame image predictive coding, introduced the coding of reference frame sequence number, improved inter frame image predictive coding efficient based on prediction residual.
During practical implementation, in the prediction data of said optimal motion data, select the optimum prediction data, can comprise:
Optimal motion data to current predicting unit in the current encoded frame are predicted from adjacent exercise data, select the exercise data (being the minimum reference motion data of cost) of cost minimum in the said adjacent exercise data to be said optimum prediction data.
Wherein, Selecting the exercise data of cost minimum in the said adjacent exercise data is said optimum prediction data; Can adopt numerous embodiments, for example: calculate said optimal motion data (MVx, MVy; Ref_idx) with the absolute error of said adjacent exercise data (being reference motion data) respective items with (sum of absolute difference, SAD); Selecting least absolute error and exercise data (being least absolute error and corresponding reference exercise data) in (SAD) the corresponding said adjacent exercise data is said optimum prediction data.And for example: calculate said optimal motion data (MVx, MVy, ref_idx) with the mean square error of said adjacent exercise data respective items with (sum of squared Error, SSE); Selecting least mean-square error and exercise data (being least mean-square error and corresponding reference exercise data) in (SSE) the corresponding said adjacent exercise data is said optimum prediction data.
During practical implementation; Selecting the exercise data of cost minimum in the said adjacent exercise data is said optimum prediction data; Can also be: calculate said optimal motion data (MVx; MVy, ref_idx) with the rate distortion costs of said adjacent exercise data respective items, the bit of the sequence number of calculation code prediction simultaneously; Select the exercise data (promptly selecting minimum rate distortion costs corresponding reference exercise data) in the corresponding said adjacent exercise data of minimum rate distortion costs to be said optimum prediction data.
During practical implementation, can, calculation code also comprise after predicting the bit of sequence number: the bit of the coded prediction sequence number that storage computation goes out; Then when the numbering of said optimum prediction data is encoded; Can directly extract the bit of the coded prediction sequence number of storage; To carry out the coding of said optimum prediction data number; And needn't be when the numbering of said optimum prediction data is encoded, the bit of double counting coded prediction sequence number.
During practical implementation, can carry out estimation and motion compensation to current predicting unit in the current encoded frame earlier, obtain said optimal motion data.
The inter frame image predictive coding method of the embodiment of the invention; At HEVC (High Efficiency Video Coding; The encoding and decoding of high efficiency video) corresponding grammar correction (syntax modification) to predicting unit is arranged in the working draft; Concrete modification is as shown in table 1, has marked in the table to revise row, and the modification part changes to the coding based on prediction residual with the coding of original reference frame sequence number.
Table 1 predicting unit grammar correction
A kind of inter frame image prediction decoding method also is provided in the embodiment of the invention, of following embodiment.Because the principle that inter frame image prediction decoding method is dealt with problems is similar with inter frame image predictive coding method, so the enforcement of inter frame image prediction decoding method can repeat part and repeat no more referring to the enforcement of inter frame image predictive coding method.
As shown in Figure 2, the handling process of the inter frame image prediction decoding method of the embodiment of the invention can comprise:
Can be learnt that by flow process shown in Figure 2 in the embodiment of the invention, decoding obtains the residual signals of the exercise data of current predicting unit in the current decoded frame and the numbering of prediction data, said exercise data comprises motion vector and reference frame sequence number; According to the numbering of said prediction data, obtain said prediction data; According to said prediction data and said residual signals, obtain said exercise data; Thereby in the inter frame image prediction decoding, introduced of the decoding of reference frame sequence number, improved inter frame image prediction decoding efficient based on prediction residual.
During practical implementation, obtain said exercise data, can comprise:, obtain said exercise data said prediction data and said residual signals addition.
A kind of video encoder and Video Decoder also are provided in the embodiment of the invention, of following embodiment.Because video encoder is similar with coding/decoding method with the inter frame image predictive coding with the principle that Video Decoder is dealt with problems; Therefore the enforcement of video encoder and Video Decoder can repeat part and repeat no more referring to the enforcement of inter frame image predictive coding and coding/decoding method.
As shown in Figure 3, the video encoder in the embodiment of the invention can comprise:
Obtain module 301, be used for obtaining the optimal motion data of the current predicting unit of current encoded frame, said optimal motion data comprise optimal motion vector and optimum reference frame sequence number;
Select module 302, be used for selecting the optimum prediction data in the prediction data of said optimal motion data;
Among the embodiment, select module 302 specifically can be used for:
Optimal motion data to current predicting unit in the current encoded frame predict that from adjacent exercise data selecting the exercise data of cost minimum in the said adjacent exercise data is said optimum prediction data.
Among the embodiment, select module 302 specifically can be used for:
The absolute error of calculating said optimal motion data and said adjacent exercise data respective items with;
Exercise data in the said adjacent exercise data of selection least absolute error and correspondence is said optimum prediction data.
Among the embodiment, select module 302 specifically can be used for:
The mean square error of calculating said optimal motion data and said adjacent exercise data respective items with;
Exercise data in the said adjacent exercise data of selection least mean-square error and correspondence is said optimum prediction data.
Among the embodiment, select module 302 specifically can be used for:
Calculate the rate distortion costs of said optimal motion data and said adjacent exercise data respective items, the bit of the sequence number of calculation code prediction simultaneously;
Selecting the exercise data in the corresponding said adjacent exercise data of minimum rate distortion costs is said optimum prediction data.
As shown in Figure 4, among the embodiment, video encoder shown in Figure 3 can also comprise:
Among the embodiment, obtain module 301 and specifically can be used for:
Current predicting unit in the current encoded frame is carried out estimation and motion compensation, obtain said optimal motion data.
As shown in Figure 5, the Video Decoder in the embodiment of the invention can comprise:
Decoder module 501, the residual signals of the exercise data that obtains the current predicting unit of current decoded frame of being used for decoding and the numbering of prediction data, said exercise data comprises motion vector and reference frame sequence number;
Prediction data obtains module 502, is used for the numbering according to said prediction data, obtains said prediction data;
Exercise data obtains module 503, is used for obtaining said exercise data according to said prediction data and said residual signals.
Among the embodiment, exercise data obtains module 503 and specifically can be used for:
With said prediction data and said residual signals addition, obtain said exercise data.
In sum, in the embodiment of the invention, obtain the optimal motion data of current predicting unit in the current encoded frame, said optimal motion data comprise optimal motion vector and optimum reference frame sequence number; In the prediction data of said optimal motion data, select the optimum prediction data; Obtain the residual signals of said optimal motion data, said residual signals is encoded; Numbering to said optimum prediction data is encoded; Thereby in the inter frame image predictive coding, introduced the coding of reference frame sequence number, improved inter frame image predictive coding efficient based on prediction residual.
In the embodiment of the invention, decoding obtains the residual signals of the exercise data of current predicting unit in the current decoded frame and the numbering of prediction data, and said exercise data comprises motion vector and reference frame sequence number; According to the numbering of said prediction data, obtain said prediction data; According to said prediction data and said residual signals, obtain said exercise data; Thereby in the inter frame image prediction decoding, introduced of the decoding of reference frame sequence number, improved inter frame image prediction decoding efficient based on prediction residual.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of the embodiment of complete hardware embodiment, complete software implementation example or combination software and hardware aspect.And the present invention can be employed in the form that one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code go up the computer program of implementing.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out through the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in ability vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work; Make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device; Make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of on computer or other programmable devices, carrying out is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Above-described specific embodiment; The object of the invention, technical scheme and beneficial effect have been carried out further explain, and institute it should be understood that the above is merely specific embodiment of the present invention; And be not used in qualification protection scope of the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (18)
1. inter frame image predictive coding method is characterized in that this method comprises:
Obtain the optimal motion data of current predicting unit in the current encoded frame, said optimal motion data comprise optimal motion vector and optimum reference frame sequence number;
In the prediction data of said optimal motion data, select the optimum prediction data;
Obtain the residual signals of said optimal motion data, said residual signals is encoded;
Numbering to said optimum prediction data is encoded.
2. the method for claim 1 is characterized in that, in the prediction data of said optimal motion data, selects the optimum prediction data, comprising:
Said optimal motion data are predicted from adjacent exercise data selecting the exercise data of cost minimum in the said adjacent exercise data is said optimum prediction data.
3. method as claimed in claim 2 is characterized in that, selecting the exercise data of cost minimum in the said adjacent exercise data is said optimum prediction data, comprising:
The absolute error of calculating said optimal motion data and said adjacent exercise data respective items with;
Exercise data in the said adjacent exercise data of selection least absolute error and correspondence is said optimum prediction data.
4. method as claimed in claim 2 is characterized in that, selecting the exercise data of cost minimum in the said adjacent exercise data is said optimum prediction data, comprising:
The mean square error of calculating said optimal motion data and said adjacent exercise data respective items with;
Exercise data in the said adjacent exercise data of selection least mean-square error and correspondence is said optimum prediction data.
5. method as claimed in claim 2 is characterized in that, selecting the exercise data of cost minimum in the said adjacent exercise data is said optimum prediction data, comprising:
Calculate the rate distortion costs of said optimal motion data and said adjacent exercise data respective items, the bit of the sequence number of calculation code prediction simultaneously;
Selecting the exercise data in the corresponding said adjacent exercise data of minimum rate distortion costs is said optimum prediction data.
6. method as claimed in claim 5 is characterized in that, behind the bit of said calculation code prediction sequence number, also comprises: the bit of the coded prediction sequence number that storage computation goes out;
Numbering to said optimum prediction data is encoded, and comprising: extract the bit of the coded prediction sequence number of storage, to carry out the coding of said optimum prediction data number.
7. the method for claim 1 is characterized in that, the optimal motion data of current predicting unit in the said acquisition current encoded frame comprise:
Current predicting unit in the current encoded frame is carried out estimation and motion compensation, obtain said optimal motion data.
8. inter frame image prediction decoding method is characterized in that this method comprises:
Decoding obtains the residual signals of the exercise data of current predicting unit in the current decoded frame and the numbering of prediction data, and said exercise data comprises motion vector and reference frame sequence number;
According to the numbering of said prediction data, obtain said prediction data;
According to said prediction data and said residual signals, obtain said exercise data.
9. method as claimed in claim 8 is characterized in that, according to said prediction data and said residual signals, obtains said exercise data, comprising:
With said prediction data and said residual signals addition, obtain said exercise data.
10. a video encoder is characterized in that, comprising:
Obtain module, be used for obtaining the optimal motion data of the current predicting unit of current encoded frame, said optimal motion data comprise optimal motion vector and optimum reference frame sequence number;
Select module, be used for selecting the optimum prediction data in the prediction data of said optimal motion data;
First coding module is used to obtain the residual signals of said optimal motion data, and said residual signals is encoded;
Second coding module is used for the numbering of said optimum prediction data is encoded.
11. video encoder as claimed in claim 10 is characterized in that, said selection module specifically is used for:
Said optimal motion data are predicted from adjacent exercise data selecting the exercise data of cost minimum in the said adjacent exercise data is said optimum prediction data.
12. video encoder as claimed in claim 11 is characterized in that, said selection module specifically is used for:
The absolute error of calculating said optimal motion data and said adjacent exercise data respective items with;
Exercise data in the said adjacent exercise data of selection least absolute error and correspondence is said optimum prediction data.
13. video encoder as claimed in claim 11 is characterized in that, said selection module specifically is used for:
The mean square error of calculating said optimal motion data and said adjacent exercise data respective items with;
Exercise data in the said adjacent exercise data of selection least mean-square error and correspondence is said optimum prediction data.
14. video encoder as claimed in claim 11 is characterized in that, said selection module specifically is used for:
Calculate the rate distortion costs of said optimal motion data and said adjacent exercise data respective items, the bit of the sequence number of calculation code prediction simultaneously;
Selecting the exercise data in the corresponding said adjacent exercise data of minimum rate distortion costs is said optimum prediction data.
15. video encoder as claimed in claim 14 is characterized in that, also comprises:
Memory module is used for the bit of the coded prediction sequence number that storage computation goes out;
Said second coding module specifically is used for: extract the bit of the coded prediction sequence number of storage, to carry out the coding of said optimum prediction data number.
16. video encoder as claimed in claim 10 is characterized in that, said acquisition module specifically is used for:
Current predicting unit in the current encoded frame is carried out estimation and motion compensation, obtain said optimal motion data.
17. a Video Decoder is characterized in that, comprising:
Decoder module, the residual signals of the exercise data that obtains the current predicting unit of current decoded frame of being used for decoding and the numbering of prediction data, said exercise data comprises motion vector and reference frame sequence number;
Prediction data obtains module, is used for the numbering according to said prediction data, obtains said prediction data;
Exercise data obtains module, is used for obtaining said exercise data according to said prediction data and said residual signals.
18. Video Decoder as claimed in claim 17 is characterized in that, said exercise data obtains module and specifically is used for:
With said prediction data and said residual signals addition, obtain said exercise data.
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