CN101299820B - Video decoding method, apparatus as well as video repairing apparatus - Google Patents
Video decoding method, apparatus as well as video repairing apparatus Download PDFInfo
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Abstract
The invention discloses a video decoding method, a device and a video repairing device, wherien the video decoding method includes: generating the Slice decoding information after completing the Slice decoding with the destined number; judging whether the Slice with destined number is provided with a false macro block, if true, generating the repairing information of the false macro block, wherein the repairing information includes the indication information of the false macro block; repairing the false macro block indicated by the indication information. The invention can reduce the complexity to realize the video decoding project.
Description
Technical field
The present invention relates to multimedia technology field, relate in particular to video encoding/decoding method, device and video repairing apparatus.
Background technology
In Video Applications, be strong correlation between the packed data (code stream), place's code stream mistake will cause a frame or the some two field pictures can not normal decoder, influence visual experience.And no matter in Network Transmission still is storing process; Error in data all is difficult to avoid; Especially true under the network environment, so Video Decoder is tried hard to through the error concealment elimination mostly or weakened the harmful effect that the erroneous video code stream brings, to the user visual experience preferably is provided as far as possible.
The prerequisite of error concealment is a wrong detection; Through video protocols is analyzed; Some comparison condition can be set in syntax parsing and semantic resolving to be detected video code flow whether mistake has taken place; If found mistake, then after this all macro blocks all can't normal decoder, up to next band (slice).Can through certain strategy to these can't normal decoder macro block carry out error concealment, make its visual experience the same with the effect of normal decoder as far as possible, said process is commonly referred to as repairing.
In a kind of video decoding project of prior art, decoder if decoding error judge to take place, can be repaired macro block that can not normal decoder in decode procedure immediately, continues the decoding to next Slice afterwards again.In realizing process of the present invention, the inventor finds that there is following problem at least in this prior art scheme: owing to be that video decode and two kinds of complex operations of error concealment are integrated, increased the complexity that this scheme realizes.
Summary of the invention
The technical problem that the embodiment of the invention will solve provides video encoding/decoding method, device and video repairing apparatus, can reduce the complexity that video decoding project realizes.
For solving the problems of the technologies described above, embodiments of the invention provide following technical scheme:
The embodiment of the invention provides a kind of video encoding/decoding method, comprising:
After the decoding of completion, generate the decoded information of said Slice to the strips S lice of predetermined quantity;
Whether judge among the Slice of said predetermined quantity wrong macro block according to said decoded information, if, then generating the repair information of said erroneous macroblock, said repair information comprises the indication information of said erroneous macroblock;
According to the patch algorithm that presets, the erroneous macroblock of said indication information indication is repaired.
The embodiment of the invention also provides a kind of video decoder, comprising:
Decoding unit is used for after the decoding of completion to the Slice of predetermined quantity, generating the decoded information of said Slice;
Judging unit, whether the Slice that is used for judging said predetermined quantity according to said decoded information wrong macro block, and the output judged result;
The repair information generation unit is used in said judged result generating and export the repair information of said erroneous macroblock when being, said repair information comprises the indication information of said erroneous macroblock;
Repair the unit, be used to receive the repair information of said erroneous macroblock, and, the erroneous macroblock of said indication information indication is repaired according to the patch algorithm that presets.
The embodiment of the invention also provides a kind of video repairing apparatus, comprising:
Receiving element is used to receive the repair information of erroneous macroblock, and said repair information comprises the indication information of said erroneous macroblock;
Repair the unit, be used for, the erroneous macroblock of said indication information indication is repaired according to the patch algorithm that presets.
Can find out from above technical scheme; The embodiment of the invention is after the decoding of the Slice that accomplishes some; Just this Slice is carried out bug patch; Therefore can video decode and these two kinds of complex operations of bug patch be separated, compare with in the prior art two kinds of complex operations of video decode and error concealment being integrated, can reduce the complexity of video decoding project realization.
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.
Fig. 1 is that first of the video encoding/decoding method that provides of the embodiment of the invention is implemented illustration;
Fig. 2 is that second of the video encoding/decoding method that provides of the embodiment of the invention is implemented illustration;
Fig. 3 is that the video decoder first that the embodiment of the invention provides is implemented illustration;
Fig. 4 is that the video decoder second that the embodiment of the invention provides is implemented illustration;
Fig. 5 is that the video repairing apparatus first that the embodiment of the invention provides is implemented illustration;
Fig. 6 is that the video repairing apparatus second that the embodiment of the invention provides is implemented illustration.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The embodiment one of video encoding/decoding method of the present invention; Fig. 1 is that first of the video encoding/decoding method that provides of the embodiment of the invention is implemented illustration, at first video code flow is decoded, and carries out the video encoding/decoding method step that the embodiment of the invention provides then;
A1, after the decoding of accomplishing the Slice of predetermined quantity, generate the decoded information of said Slice.
A2, whether judge among the Slice of said predetermined quantity wrong macro block according to said decoded information, if, then generating the repair information of said erroneous macroblock, said repair information comprises the indication information of said erroneous macroblock.
The patch algorithm that A3, basis preset is repaired the erroneous macroblock of said indication information indication.
The embodiment of the invention is after the decoding of the Slice that accomplishes some; Just this Slice is carried out bug patch; Therefore can video decode and these two kinds of complex operations of bug patch be separated; Compare with in the prior art two kinds of complex operations of video decode and error concealment being integrated, can reduce the complexity that video decoding project realizes.
Fig. 2 is that second of the video encoding/decoding method that provides of the embodiment of the invention is implemented illustration.
Video decode first embodiment that video encoding/decoding method second embodiment that the embodiment of the invention provides provides with respect to the embodiment of the invention increases " at least two patch algorithms that preset, confirm be suitable for patch algorithm that said erroneous macroblock is repaired " step; Find out the patch algorithm that is fit to current erroneous macroblock; Accelerate the fix errors macro block, improve simultaneously and repair chance of success.
At first video code flow is decoded, carry out the video encoding/decoding method step that the embodiment of the invention provides then;
B1, after the decoding of accomplishing the Slice of predetermined quantity, generate the decoded information of said Slice.
B2, whether judge among the Slice of said predetermined quantity wrong macro block according to said decoded information, if, then generating the repair information of said erroneous macroblock, said repair information comprises the indication information of said erroneous macroblock.
Wherein, the decoded information of the Slice of said predetermined quantity can be the set of the indication information of the macro block that can't correctly decode among the Slice of this predetermined quantity,, below illustrates for understanding for just:
In this example, can suppose that each Slice is made up of 50 macro blocks, the predetermined quantity of Slice is 2; And the numbering of each macro block connects among the Slice; For example the numbering of 50 macro blocks of the 1st the Slice numbering that is followed successively by 50 macro blocks of 1 to 50, the 2 Slice is followed successively by 51 to 100, on this basis; If have only preceding 10 macro blocks decoding correct among the 1st Slice; 40 macro blocks in back can't normal decoder, and all macro blocks are all decoded correctly among the 2nd Slice, and then the decoded information of the Slice of generation can be the indication information of back 40 macro blocks among the 1st Slice.
Further; Can whether judge among the Slice wrong macro block according to the set of the indication information of the macro block that can't correctly decode among the Slice; If this set is not empty, then confirm wrong macro block among the Slice, and indicated macro block is exactly an erroneous macroblock in this set.
Understandable; The decoded information of the Slice of said predetermined quantity also can be the set of indication information that obtains the macro block of correct decoding among the Slice of this predetermined quantity; Further, can gather according to this and whether judge among the Slice wrong macro block, if do not comprise the indication information of all macro blocks among the Slice in this set; Then confirm wrong macro block among the Slice, and the macro block that does not indicate in this set is exactly an erroneous macroblock.
B3, in two patch algorithms that preset, confirm to be suitable for patch algorithm that said erroneous macroblock is repaired at least.
B4, according to the determined patch algorithm that presets, the erroneous macroblock of said indication information indication is repaired.
In the present embodiment; The said patch algorithm that is suitable for erroneous macroblock is repaired can be confirmed according to the corresponding video scene type information of erroneous macroblock; Also can confirm, can also confirm with the coding type information that erroneous macroblock belong to frame according to the corresponding video scene type information of erroneous macroblock according to the coding type information that erroneous macroblock belongs to frame.Wherein, the corresponding video scene type information of erroneous macroblock can be to obtain according to the analysis to said erroneous macroblock place frame, also can be the analysis that said erroneous macroblock belongs to frame and consecutive frame is obtained.For ease of understanding, below illustrate:
In this example, the video scene type can comprise following several kinds:
Static scene: some content frames that time domain is closed on are constant or approximate constant, can perhaps infer whether be in static scene according to the absolute value of the bias sum (SAD) of two frame corresponding regions less than certain threshold value according to the mould of motion vector less than certain threshold value.
The even moving scene of large tracts of land: though scene is being moved, each regional movement form of a two field picture is approximate, will produce typical spatial domain moving scene such as the camera lens translation.Can whether be in the even moving scene in spatial domain less than certain threshold decision according to the motion vector difference adjacent or close macro block of correctly decoding.
The image texture simple scenario: the specific region content of image is single, changes inviolently between the pixel, is exactly typical texture simple scenario such as cloudless sky.Can whether judge whether to be the texture simple scenario through the variance of each pixel value of image specific region less than certain threshold value.
Even moving scene on the time domain: the direction of motion of image is all more consistent with movement velocity in a period of time, and the ratio that can encode according to the present frame erroneous macroblock adjacent macroblocks direct predictive mode of B frame (B-Direct) mode is greater than certain threshold decision.
The type of frame of video can comprise following several kinds:
P frame: a frame of video with reference to forward reference frame;
B frame: might be with reference to forward reference frame and the frame of video of back to reference frame;
I frame: can independently decode, not with reference to the frame of video of other images;
In the specific implementation, can in system, preset following 4 kinds of patch algorithms:
First patch algorithm, duplicate and the corresponding macro block in erroneous macroblock position, and replace erroneous macroblock with the macro block that is duplicated from the contiguous frame of video of correct decoding;
Second patch algorithm, according to the motion vector of the motion vector estimation erroneous macroblock of the macro block of correct decoding around the erroneous macroblock; According to estimated motion vector; With the reference frame is the alternative macro block that benchmark obtains erroneous macroblock, replaces erroneous macroblock with the alternative macro block that is obtained;
The 3rd patch algorithm, according to the pixel value of the macro block direct estimation erroneous macroblock of correct decoding around the erroneous macroblock;
The 4th patch algorithm, according to back motion vector of corresponding macro block on reference frame, in conjunction with the motion vector of the time interval misjudgment piece of reference frame, obtain pixel data and weighting to two reference frames then; This method can be with " B-Direct " mode class ratio of being adopted by a plurality of video encoding and decoding standard, can be similar to think decoded macroblock not by the method reconstruct pixel value of B-Direct macro block decoding.
Can in above-mentioned four patch algorithms, confirm to be suitable for patch algorithm that erroneous macroblock is repaired according to following strategy:
1), confirms that then first patch algorithm is to be suitable for patch algorithm that erroneous macroblock is repaired if the corresponding video scene of erroneous macroblock is a static scene;
2), confirm that then second patch algorithm is to be suitable for patch algorithm that erroneous macroblock is repaired if the corresponding video scene of erroneous macroblock is the even moving scene of large tracts of land;
3) if the corresponding video scene of erroneous macroblock is the image texture simple scenario, perhaps erroneous macroblock place frame is the I frame, confirms that then the 3rd patch algorithm is to be suitable for patch algorithm that erroneous macroblock is repaired;
4) if erroneous macroblock place frame is the B frame, and the corresponding video scene of erroneous macroblock is even moving scene on the time domain, confirms that then the 4th patch algorithm is to be suitable for patch algorithm that erroneous macroblock is repaired.
In video encoding/decoding method embodiment two of the present invention; Not only video decode and this two places complex operations of bug patch are separated; Can also be from multiple patch algorithm automatically selection be suitable for algorithm that erroneous macroblock is repaired most, efficient that therefore can be higher and quality erroneous macroblock is repaired.
In the embodiment of video encoding/decoding method of the present invention; The Slice of said predetermined quantity is at least two Slice; Like this; If wrong macro block among the Slice of front can utilize the information of the macro block that decoding is correct among the Slice at the back when erroneous macroblock is repaired, thereby can further improve the repair efficiency of erroneous macroblock.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to accomplish through program; Described program can be stored in the computer read/write memory medium; This program can comprise the steps: video code flow is decoded when carrying out; After the decoding of completion, generate the decoded information of said Slice to the strips S lice of predetermined quantity; Whether judge among the Slice of said predetermined quantity wrong macro block according to said decoded information, if, then generating the repair information of said erroneous macroblock, said repair information comprises the indication information of said erroneous macroblock; According to the patch algorithm that presets, the erroneous macroblock of said indication information indication is repaired.Here the alleged storage medium that gets, as: ROM/RAM, magnetic disc, CD etc.
Fig. 3 is that the video decoder first that the embodiment of the invention provides is implemented illustration.
With reference to figure 3, video decoder embodiment one of the present invention comprises decoding unit 310 and judging unit 320, repair information generation unit 330 and repairing unit 340:
Decoding unit 310 is used for after the decoding of completion to the Slice of predetermined quantity, generating the decoded information of said Slice.
Judging unit 320, whether the Slice that is used for judging said predetermined quantity according to said decoded information wrong macro block, and the output judged result.
Repair information generation unit 330 is used in said judged result generating and export the repair information of said erroneous macroblock when being, said repair information comprises the indication information of said erroneous macroblock.
Video decoder embodiment one of the present invention can adopt the method for video encoding/decoding method basic procedure of the present invention to realize.The embodiment of the invention is that decoding unit is after the decoding of the Slice that accomplishes some; After judgment unit judges Slice makes mistakes; The repair information generation unit just carries out bug patch to this Slice; Therefore the video decoder that provides of the embodiment of the invention can be realized video decode and these two kinds of complex operations of bug patch are separated, and can reduce the complexity of video decoding project realization.
Fig. 4 is that the video decoder second that the embodiment of the invention provides is implemented illustration.
Similar with reference to figure 4, video decoder embodiment of the present invention two and video decoder embodiment of the present invention; The difference part is; The video decoder embodiment two that the embodiment of the invention provides increases " patch algorithm is confirmed the unit " with respect to video decoder embodiment one; Patch algorithm confirms that the unit finds out the patch algorithm that is fit to current erroneous macroblock, accelerates to repair current erroneous macroblock, improves simultaneously and repairs chance of success; The video decoder embodiment two that the embodiment of the invention provides further comprises " the repair information receiving element is used to carry out the repairing module of different patch algorithms with several " with respect to video decoder embodiment one " repairing unit "; Different repair information are given different repairing modules to be handled; The division of labor is repaired in refinement, makes that the repairing of erroneous macroblock is accurate more and quick.
In the present embodiment, video decoder comprises that also patch algorithm confirms unit 350, comprises that further repair information receiving element 341 and several are used to carry out the repairing module 342 of different patch algorithms and repair unit 340, wherein:
Patch algorithm confirms that unit 350 is used in the judged result of judging unit 321 output when being, in two patch algorithms that preset, confirms the patch algorithm that said erroneous macroblock is repaired and the control command of the said patch algorithm of output startup at least.
Repair information receiving element 341 is used to receive the repair information of the said erroneous macroblock of said modification information generating unit output, and said repair information comprises the indication information of said erroneous macroblock.
Arbitrary repairing module 342 is used for starting the execution of this patch algorithm receiving said patch algorithm when confirming the control command of patch algorithm of this module of startup of unit output, and the erroneous macroblock of said indication information indication is repaired.
The embodiment of the invention also provides the embodiment of video repairing apparatus.
Fig. 5 is that the video repairing apparatus first that the embodiment of the invention provides is implemented illustration.
The embodiment one of video repairing apparatus of the present invention can be used for the erroneous macroblock described in the video decoder embodiment one of the present invention is repaired; Embody the characteristic that the operation of video decode and bug patch is separated, compared with in the prior art two kinds of complex operations of video decode and error concealment being integrated, can reduce the complexity of video decoding project realization.With reference to figure 5, the present embodiment device comprises receiving element 610 and repairs unit 620:
Receiving element 610 is used to receive the repair information of erroneous macroblock, and said repair information comprises the indication information of said erroneous macroblock;
Repair unit 620 and be used for, the erroneous macroblock of said indication information indication is repaired according to the patch algorithm that presets.
Fig. 6 is that the video repairing apparatus second that the embodiment of the invention provides is implemented illustration.
With reference to figure 6; The embodiment two of video repairing apparatus of the present invention is similar with embodiment one; The difference part is that the video repairing apparatus embodiment two that the embodiment of the invention provides further comprises " the repair information receiving element is used to carry out the repairing module of different patch algorithms with several " with respect to video repairing apparatus embodiment one " repairing unit ", different repair information is given different repairing modules handle; The division of labor is repaired in refinement, makes that the repairing of erroneous macroblock is accurate more and quick.
In the present embodiment; Repair unit 620 and comprise that further several are used to carry out the repairing module 621 of different patch algorithms; Said arbitrary repairing module is used for when receiving the control command of the patch algorithm that starts this module; Utilize the patch algorithm of this module, the erroneous macroblock of said indication information indication is repaired.
In the more embodiment of the present invention, judging unit described in the video decoder embodiment one of the present invention and repair information generation unit also can be to place video repairing apparatus.
In the embodiment of the invention; After the decoding of the Slice that accomplishes some; Just this Slice is carried out bug patch; Therefore can video decode and these two kinds of complex operations of bug patch be separated, compare with in the prior art two kinds of complex operations of video decode and error concealment being integrated, can reduce the complexity of video decoding project realization.
Further; Not only video decode and this two places complex operations of bug patch are separated in the embodiment of the invention; Can also be from multiple patch algorithm automatically selection be suitable for algorithm that erroneous macroblock is repaired most, efficient that therefore can be higher and quality erroneous macroblock is repaired.
In addition; In the embodiment of video encoding/decoding method of the present invention; The Slice of said predetermined quantity is at least two Slice, like this, if wrong macro block among the Slice of front; The information of the macro block that decoding is correct among the Slice at the back can be utilized when erroneous macroblock is repaired, thereby the repair efficiency of erroneous macroblock can be further improved.
More than video encoding/decoding method, device and video repairing apparatus that the embodiment of the invention provided have been carried out detailed introduction; Used concrete example among this paper principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and thought thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. a video encoding/decoding method is characterized in that, comprising:
After the decoding of completion, generate the decoded information of said Slice to the strips S lice of predetermined quantity;
Whether judge among the Slice of said predetermined quantity wrong macro block according to said decoded information, if, then generating the repair information of said erroneous macroblock, said repair information comprises the indication information of said erroneous macroblock;
According to the patch algorithm that presets, the erroneous macroblock of said indication information indication is repaired.
2. the method for claim 1 is characterized in that:
The patch algorithm that said basis presets; Also comprise before said erroneous macroblock repaired: according in the coding type information of corresponding video scene type information of said erroneous macroblock or said erroneous macroblock place frame at least one, confirm the patch algorithm that said erroneous macroblock is repaired at least in two patch algorithms that preset;
According to the patch algorithm that presets, erroneous macroblock is repaired specifically:, erroneous macroblock is repaired according to determined patch algorithm.
3. method as claimed in claim 2; It is characterized in that; Said according at least one in the coding type information of corresponding video scene type information of said erroneous macroblock or said erroneous macroblock place frame, in two patch algorithms that preset, confirm that the patch algorithm that said erroneous macroblock is repaired comprises at least:
If the corresponding video scene of said erroneous macroblock is a static scene, confirm that then the patch algorithm that said erroneous macroblock is repaired is first patch algorithm; Said first patch algorithm comprises: duplicate and the corresponding macro block in erroneous macroblock position from the contiguous frame of video of correct decoding, and replace erroneous macroblock with the macro block that is duplicated;
If the corresponding video scene of said erroneous macroblock is the even moving scene of large tracts of land; Confirm that then the patch algorithm that said erroneous macroblock is repaired is second patch algorithm; Said second patch algorithm comprises: according to the motion vector of the motion vector estimation erroneous macroblock of the macro block of correct decoding around the erroneous macroblock; According to estimated motion vector, be the alternative macro block that benchmark obtains erroneous macroblock with the reference frame, replace erroneous macroblock with the alternative macro block that is obtained;
If the corresponding video scene of said erroneous macroblock is that image texture simple scenario or said erroneous macroblock place frame are the I frame; Confirm that then the patch algorithm that said erroneous macroblock is repaired is the 3rd patch algorithm, said the 3rd patch algorithm comprises: according to the pixel value of the macro block direct estimation erroneous macroblock of correct decoding around the erroneous macroblock;
If said erroneous macroblock place frame is B frame and the corresponding video scene of said erroneous macroblock is even moving scene on the time domain; Confirm that then the patch algorithm that said erroneous macroblock is repaired is the 4th patch algorithm; Said the 4th patch algorithm comprises: according to the motion vector of back corresponding macro block on reference frame; In conjunction with the motion vector of the time interval misjudgment piece of reference frame, obtain pixel data and weighting to two reference frames then.
4. method as claimed in claim 3 is characterized in that, the corresponding video scene type information of said erroneous macroblock is according to said erroneous macroblock place frame, or the frame type analysis of said erroneous macroblock place frame and consecutive frame is obtained.
5. like each described method of claim 1 to 4, it is characterized in that the Slice of said predetermined quantity is at least two Slice.
6. a video decoder is characterized in that, comprising:
Decoding unit is used for after the decoding of completion to the Slice of predetermined quantity, generating the decoded information of said Slice;
Judging unit, whether the Slice that is used for judging said predetermined quantity according to said decoded information wrong macro block, and the output judged result;
The repair information generation unit is used in said judged result generating and export the repair information of said erroneous macroblock when being, said repair information comprises the indication information of said erroneous macroblock;
Repair the unit, be used to receive the repair information of said erroneous macroblock, and, the erroneous macroblock of said indication information indication is repaired according to the patch algorithm that presets.
7. device as claimed in claim 6; It is characterized in that; Said video decoder also comprises: patch algorithm is confirmed the unit; Be used in the judged result of said judging unit output when being, in two patch algorithms that preset, confirm the patch algorithm that said erroneous macroblock is repaired and the control command of the said patch algorithm of output startup at least.
8. device as claimed in claim 7 is characterized in that, said repairing unit comprises that further repair information receiving element and several are used to carry out the repairing module of different patch algorithms, wherein:
The repair information receiving element is used to receive the repair information of the said erroneous macroblock of said repair information generation unit output, and said repair information comprises the indication information of said erroneous macroblock;
Said arbitrary repairing module is used for starting the execution of this patch algorithm receiving said patch algorithm when confirming the control command of patch algorithm of this module of startup of unit output, and the erroneous macroblock of said indication information indication is repaired.
9. a video repairing apparatus is characterized in that, comprising:
Receiving element is used to receive the repair information of erroneous macroblock, and said repair information comprises the indication information of said erroneous macroblock; The decoded information that said erroneous macroblock generates after accomplishing through the Slice decoding of predetermined quantity is confirmed;
Repair the unit, be used for, the erroneous macroblock of said indication information indication is repaired according to the patch algorithm that presets.
10. device as claimed in claim 9; It is characterized in that; Said repairing unit comprises that several are used to carry out the repairing module of different patch algorithms; Said arbitrary repairing module is used for when receiving the control command of the patch algorithm that starts this module, utilizes the patch algorithm of this module that the erroneous macroblock of said indication information indication is repaired.
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