CN1859574A - Method for determining predicting mode in increased layer frame and coding and decoding device - Google Patents
Method for determining predicting mode in increased layer frame and coding and decoding device Download PDFInfo
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Abstract
The present invention provides determining reinforcement intraframe predicting mode method and coding decoding equipment. It contains determining reinforcement intraframe predicting mode in part intraframe predicting mode. The present invention avoids predictive coding and calculation process to all direction predicting mode, thereby raising calculation efficiency.
Description
Technical field
The present invention relates to the video coding compression technique area, be specifically related to a kind of method and coding/decoding apparatus of definite enhancement layer frame inner estimation mode.
Background technology
Rapid popularization along with Development of Multimedia Technology and multimedia application, video image compression standard and technology have obtained paying close attention to widely, particularly uniting the JVT of standard formulation working group that forms by MPEG (Motion Picture Experts Group) and two normal structures of ITU (International Telecommunications Union) H.264 formulates, because its advanced technical characterstic and compression performance preferably, not only be applied, but also have broad application prospects in fields such as video conferencing, video telephone, Streaming Media, HDDVD, video monitoring, Digital Television, 3G.
H.264 compression is handled framework as shown in Figure 1.
In Fig. 1, the basic handling unit that compression is handled is 16 * 16 macro blocks, adopted advanced technologies such as multiframe reference, infra-frame prediction, many macro block modes, 4 * 4 integer transforms and quantification, circle filtering, 1/4 picture element movement prediction, CAVLC and CABAC entropy coding, its compression efficiency than MPEG-2, H.263, MPEG-4 ASP doubles many.
H.264 the main profile H.264 of the basic layer compatibility in the hierarchical coding standard, adopt the algorithm frame of MCTF (Motion compensation temporal filter is based on the time filtering of motion compensation), can realize spatial (space) layering, temporal (time) layering, quality or functions such as SNR (quality) layering, complexity (complexity) layering preferably.The up-to-date reference model of JVT SVC (vedio layering coding) is JSVM2.
H.264 a main feature is to have adopted multidirectional INTRA (intra-frame encoding mode in the video coding) Forecasting Methodology, promptly adopted the intra-frame prediction method of multiple predictive mode, comprise as luma prediction: two kinds of predictions of the infra-frame prediction of 16 * 16 macro blocks and 4 * 4 infra-frame prediction unit, wherein 16 * 16 macro block infra-frame prediction comprises vertical, horizontal, DC (low frequency component in the cosine transform coefficient) and four kinds of predictive modes of Plane; 4 * 4 infra-frame prediction comprises Vertical, Horizontal, DC, DiagonalDown-Left, Diagonal Down-Right, Vertical-Left, Horizontal-Down, Vertical-Right and nine kinds of predictive modes of Horizontal-Up, respectively shown in accompanying drawing 2 and accompanying drawing 3.Colorimetric prediction is that unit carries out with 8 * 8 block sizes for another example, comprises Vertical, Horizontal, DC and four kinds of predictive modes of Plane, is similar to 16 * 16 macro block INTRA luma prediction, specifically as shown in Figure 4.
The JSVM2 enhancement layer has increased a kind of new Forecasting Methodology again on the basis of H.264 INTRA Forecasting Methodology, i.e. I_BL.I_BL utilization current macro in anterior layer is carried out infra-frame prediction at each pixel value of the corresponding macro block of low layer to current macro, specifically as shown in Figure 5.
Coding side needs to determine the predictive mode of current macro/piece when enhancement layer current macro/piece is encoded.In the process of determining enhancement layer current macro/block prediction mode, need utilize all directional prediction modes that current macro/piece is predicted, obtain the RD_cost value of all directions predictive mode correspondence, utilize other predictive mode such as I_BL predictive mode that current macro/piece is predicted again, obtain the RD_cost value of I_BL predictive mode, then, the predictive mode of choosing RD_cost value reckling correspondence is the predictive mode of current macro/piece.
From top description as can be known, the predictive mode of the corresponding multiple direction of enhancement layer current macro/piece, predictive mode as 9 directions of 4 * 4 correspondences, the predictive mode of 16 * 16 macro blocks and 4 directions of 8 * 8 correspondences, coding side adopts the predictive mode of all directions that current macro/piece is carried out predictive coding, makes the method for definite current macro/block prediction mode have shortcomings such as computation complexity is big, computational efficiency is low.
Summary of the invention
The objective of the invention is to, a kind of method and coding/decoding apparatus of definite enhancement layer frame inner estimation mode are provided, by in the intra prediction mode of lesser amt, determining to have overcome shortcomings such as the computation complexity that exists in the prior art is big, computational efficiency is low by the enhancement layer frame inner estimation mode.
For achieving the above object, the method for a kind of definite enhancement layer frame inner estimation mode provided by the invention comprises:
Determine the intra prediction mode of enhancement layer current macro/piece according to the part directional prediction modes.
Described current macro/piece is: 16 * 16 based on the macro block of the intra-frame encoding mode in the video coding or 8 * 8 based on the piece of the intra-frame encoding mode in the video coding or 4 * 4 piece based on the intra-frame encoding mode in the video coding.
Described method specifically comprises:
A, from all directional prediction modes of enhancement layer current macro/piece correspondence the selected part directional prediction modes;
B, coding side are determined the predictive coding efficiency measure value of current macro/piece correspondence respectively according to described part directional prediction modes, I_BL predictive mode;
C, coding side are defined as the predictive mode of minimum predictive coding efficiency measure value correspondence the intra prediction mode of enhancement layer current macro/piece.
Described method specifically comprises:
A ', set up the corresponding relation of all directional prediction modes and part directional prediction modes;
B ', when enhancement layer current macro/piece and its corresponding low layer macroblock/block are piece based on the intra-frame encoding mode in the video coding, coding side/decoding end is determined the predictive mode of the low layer macroblock/block of enhancement layer current macro/piece correspondence;
C ', coding side/decoding end are determined the intra prediction mode of current macro/piece according to the predictive mode of described low layer macroblock/block, described corresponding relation.
Described step c ' is specially:
Coding side/decoding end according to described corresponding relation with the predictive mode of the predictive mode correspondence of described low layer macroblock/block intra prediction mode as current macro/piece; Or
Coding side is determined the predictive mode of the predictive mode correspondence of described low layer macroblock/block according to described corresponding relation;
Coding side is according to the predictive mode of described correspondence, the predictive coding efficiency measure value that the I_BL predictive mode is determined current macro/piece correspondence respectively;
Coding side is defined as the predictive mode of minimum predictive coding efficiency measure value correspondence the predictive mode of enhancement layer current macro/piece.
Described method also comprises:
Coding side is encoded to the intra prediction mode of described definite current macro/piece, and the coded message of described intra prediction mode is transferred to decoding end;
Described decoding end is determined the intra prediction mode of enhancement layer current macro/piece according to the coded message of the intra prediction mode of current macro/piece.
Described current macro/piece be 16 * 16 based on the macro block of the intra-frame encoding mode in the video coding or 8 * 8 based on the piece of the intra-frame encoding mode in the video coding time, all directional prediction modes of current macro/piece correspondence comprise: the infra-frame prediction of DC predictive mode, vertical predictive mode, horizontal predictive mode, Plane predictive mode;
Described current block be 4 * 4 based on the piece of the intra-frame encoding mode in the video coding time, all directional prediction modes of current block correspondence comprise: Vertical predictive mode, Horizontal predictive mode, DC predictive mode, Diagonal Down-Left predictive mode, Diagonal Down-Right predictive mode, Vertical-Left predictive mode, Horizontal-Down predictive mode, Vertical-Right predictive mode, Horizontal-Up predictive mode;
And described part directional prediction modes comprises: DC predictive mode, Horizontal predictive mode and Vertical predictive mode; Or
Described part directional prediction modes comprises: DC predictive mode, Horizontal predictive mode, Vertical predictive mode, Diagonal down-left predictive mode and Diagonal down-right predictive mode.
Described step a ' specifically comprises:
Set the corresponding Vertical predictive mode of Vertical predictive mode, the corresponding Horizontal predictive mode of Horizontal predictive mode, the corresponding DC predictive mode of DC predictive mode, the corresponding Diagonal Down-Left of Diagonal Down-Left predictive mode predictive mode, the corresponding Diagonal Down-Right of Diagonal Down-Right predictive mode predictive mode, the corresponding Vertical predictive mode of Vertical-Left predictive mode, the corresponding Horizontal predictive mode of Horizontal-Down predictive mode, the corresponding Vertical predictive mode of Vertical-Right predictive mode, the corresponding Horizontal predictive mode of Horizontal-Up predictive mode; Or
Set the corresponding Vertical predictive mode of Vertical predictive mode, the corresponding Horizontal predictive mode of Horizontal predictive mode, the corresponding DC predictive mode of DC predictive mode, the corresponding Vertical predictive mode of Diagonal Down-Left predictive mode, the corresponding Horizontal predictive mode of Diagonal Down-Right predictive mode, the corresponding Vertical predictive mode of Vertical-Left predictive mode, the corresponding Horizontal predictive mode of Horizontal-Down predictive mode, the corresponding Vertical predictive mode of Vertical-Right predictive mode, the corresponding Horizontal predictive mode of Horizontal-Up predictive mode; Or
Set the corresponding Vertical predictive mode of Vertical predictive mode, the corresponding Horizontal predictive mode of Horizontal predictive mode, the corresponding DC predictive mode of DC predictive mode, the corresponding DC predictive mode of Plane predictive mode.
The present invention also provides a kind of coding/decoding apparatus, be provided with and determine enhancement layer frame inner estimation mode module, described enhancement layer frame inner estimation mode module: the intra prediction mode of determining enhancement layer current macro/piece in the part directional prediction modes from all directional prediction modes of enhancement layer current macro/piece correspondence.
Described enhancement layer frame inner estimation mode module comprises:
Storage area information submodule: the part directional prediction modes information that storage is chosen from all directional prediction modes of enhancement layer current macro/piece correspondence;
Calculate predictive coding efficiency measure value submodule: the predictive coding efficiency measure value of determining current macro/piece correspondence according to described part directional prediction modes, I_BL predictive mode respectively;
Determine submodule 1: the predictive mode that the predictive mode of minimum predictive coding efficiency measure value correspondence is defined as enhancement layer current macro/piece.
Described enhancement layer frame inner estimation mode module comprises:
Storage corresponding relation submodule: the corresponding relation of storing all directional prediction modes and part directional prediction modes;
Determine low layer predictive mode submodule: determine the predictive mode of the low layer macroblock/block of enhancement layer current macro/piece correspondence, and determine the predictive mode of the predictive mode correspondence of low layer macroblock/block according to described corresponding relation;
Determine submodule 2: the predictive mode of determining enhancement layer current macro/piece according to the predictive mode of the predictive mode correspondence of described low layer macroblock/block.
Description by technique scheme as can be known, the present invention has avoided predictive coding and calculation process to all directional prediction modes by determine the enhancement layer frame inner estimation mode in the intra prediction mode of lesser amt; The present invention exists selecteed ratio little by the concrete directional prediction modes that experimental results show that, and the high characteristics of computation complexity, so the present invention can reduce the computation complexity of determining current macro/block prediction mode method greatly under the situation of not obvious reduction coding efficiency; The present invention is the selected part directional prediction modes flexibly, and the part directional prediction modes chosen quantity and concrete predictive mode without limits; Thereby realized improving computational efficiency and the purpose of not obvious reduction code efficiency by technical scheme provided by the invention.
Description of drawings
Fig. 1 is a compression processing framework schematic diagram H.264;
Fig. 2 is the luma prediction method schematic diagram of 16 * 16 macro blocks H.264;
Fig. 3 is 4 * 4 a luma prediction method schematic diagram H.264;
Fig. 4 is 8 * 8 a colorimetric prediction method schematic diagram H.264;
Fig. 5 is an I_BL predictive mode schematic diagram;
Fig. 6 is a coding/decoding apparatus schematic diagram one of the present invention;
Fig. 7 is a coding/decoding apparatus schematic diagram two of the present invention.
Embodiment
The core of the definite enhancement layer frame inner estimation mode module in the method for definite enhancement layer frame inner estimation mode provided by the invention and the coding/decoding apparatus all is: determine the enhancement layer frame inner estimation mode in the partial frame inner estimation mode, promptly determine the enhancement layer frame inner estimation mode in the intra prediction mode of lesser amt.
In JSVM2, all directions predictive mode and other predictive mode such as I_BL predictive mode selecteed ratio in the actual coding process have nothing in common with each other, if the computation complexity of all directions predictive mode and the computation complexity of I_BL predictive mode are compared, clearly, the computation complexity of all directions predictive mode is very big, if the selecteed ratio of all directions predictive mode is very little, and other predictive mode such as the selecteed ratio of I_BL predictive mode are bigger, so, in the process that adopts all directional prediction modes that the enhancement layer present frame is predicted, only adopt the part directional prediction modes that present frame is predicted, then can not be subjected under the situation of obviously influence at coding efficiency, greatly reduce the computation complexity of definite current macro/block prediction mode method, thereby improved computational efficiency, finally improved code efficiency.
For determining all directions predictive mode and the selecteed ratio of I_BL predictive mode, the present invention carries out test experiments to these 8 video sequences of bus, city, foreman, mobile, harbour, football, crew and soccer respectively.
In test experiments, the two spatial layers (same QPboth spatial layers) that each video sequence all requires according to CE7, the test that one quality layer (promptly having two space layer of identical QP value, a quality layers) has been 8 QP (quantization parameter), these 8 QP are respectively: 8,12,16,20,24,28,32,36, and each video sequence is all tested 50 frames.
The statistics of selecteed percentage of the predictive mode of all directions and the selecteed percentage of I_BL predictive mode is as shown in table 1.
Table 1
| INTRA_BL | INTRA_16*16 | INTRA_4*4 | |
| BUS | |||
| QP＝8 | 49.2929 | 0.2020 | 50.5051 |
| QP＝12 | 56.5657 | 0.6061 | 42.8283 |
| QP＝16 | 63.2323 | 0.4040 | 36.3636 |
| QP＝20 | 62.8283 | 0.8081 | 36.3636 |
| QP＝24 | 64.8485 | 0.6061 | 34.5455 |
| QP＝28 | 68.6869 | 1.0101 | 30.3030 |
| QP＝32 | 67.8788 | 3.2323 | 28.8889 |
| QP＝36 | 72.5253 | 6.0606 | 21.4141 |
| FOOTBALL | |||
| QP＝8 | 70.9091 | 0.0000 | 29.0909 |
| QP＝12 | 72.3232 | 0.2020 | 27.4747 |
| QP＝16 | 73.3333 | 0.2020 | 26.4646 |
| QP＝20 | 74.5455 | 0.4040 | 25.0505 |
| QP＝24 | 75.9596 | 1.6162 | 22.4242 |
| QP＝28 | 76.3636 | 2.0202 | 21.6162 |
| QP＝32 | 77.5758 | 3.8384 | 18.5859 |
| QP＝36 | 77.1717 | 6.0606 | 16.7677 |
| CITY | |||
| QP＝8 | 57.7778 | 0.5556 | 41.6667 |
| QP＝12 | 67.3232 | 0.4040 | 32.2727 |
| QP＝16 | 68.3333 | 0.7071 | 30.9596 |
| QP＝20 | 70.1010 | 1.1616 | 28.7374 |
| QP＝24 | 70.9596 | 2.1212 | 26.9192 |
| QP＝28 | 72.1212 | 3.3333 | 24.5455 |
| QP＝32 | 74.7475 | 3.8889 | 21.3636 |
| QP＝36 | 76.0606 | 6.6162 | 17.3232 |
| CREW | |||
| QP＝8 | 56.5657 | 1.5657 | 41.8687 |
| QP＝12 | 67.1212 | 1.9192 | 30.9596 |
| QP＝16 | 68.4848 | 2.2727 | 29.2424 |
| QP＝20 | 68.1313 | 5.7071 | 26.1616 |
| QP＝24 | 66.8687 | 10.5051 | 22.6263 |
| QP＝28 | 67.7273 | 13.8384 | 18.4343 |
| QP＝32 | 70.8081 | 15.2020 | 13.9899 |
| QP＝36 | 72.4747 | 18.1818 | 9.3434 |
| FOREMAN | |||
| QP＝8 | 49.6970 | 1.0101 | 49.2929 |
| QP＝12 | 56.3636 | 1.2121 | 42.4242 |
| QP＝16 | 64.0404 | 1.2121 | 34.7475 |
| QP＝20 | 64.6465 | 0.8081 | 34.5455 |
| QP＝24 | 69.0909 | 1.8182 | 29.0909 |
| QP＝28 | 70.3030 | 3.4343 | 26.2626 |
| QP＝32 | 72.3232 | 3.8384 | 23.8384 |
| QP＝36 | 75.5556 | 4.2424 | 20.2020 |
| HARBOUR | |||
| QP＝8 | 65.3535 | 0.0000 | 34.6465 |
| QP＝12 | 70.0000 | 0.0505 | 29.9495 |
| QP＝16 | 72.3737 | 0.0505 | 27.5758 |
| QP＝20 | 71.8182 | 0.2525 | 27.9293 |
| QP＝24 | 72.6263 | 0.4040 | 26.9697 |
| QP＝28 | 73.9394 | 0.9596 | 25.1010 |
| QP＝32 | 75.7071 | 1.5657 | 22.7273 |
| QP＝36 | 76.6667 | 3.2323 | 20.1010 |
| MOBILE | |||
| QP＝8 | 45.6566 | 0.4040 | 53.9394 |
| QP＝12 | 46.6667 | 0.6061 | 52.7273 |
| QP＝16 | 48.4848 | 0.6061 | 50.9091 |
| QP＝20 | 50.3030 | 0.8081 | 48.8889 |
| QP＝24 | 55.3535 | 0.6061 | 44.0404 |
| QP＝28 | 61.8182 | 0.4040 | 37.7778 |
| QP＝32 | 65.8586 | 1.2121 | 32.9293 |
| QP＝36 | 73.5354 | 2.0202 | 24.4444 |
| SOCCER | |||
| QP＝8 | 56.7677 | 0.3535 | 42.8788 |
| QP＝12 | 72.6263 | 0.5556 | 26.8182 |
| QP＝16 | 76.2626 | 0.4040 | 23.3333 |
| QP＝20 | 77.4747 | 0.8081 | 21.7172 |
| QP＝24 | 77.9293 | 2.1717 | 19.8990 |
| QP＝28 | 77.5253 | 5.1010 | 17.3737 |
| QP＝32 | 77.8283 | 7.9798 | 14.1919 |
| QP＝36 | 78.2828 | 10.5556 | 11.1616 |
| MAX | 78.2828 | 18.1818 | 53.9394 |
| MIN | 45.6566 | 0.0000 | 9.3434 |
| AVERAGE | 66.4094 | 2.7178 | 29.4302 |
From the statistics of above-mentioned table 1 as can be known, in the enhancement layer infra-frame prediction, the mean value of the selected percentage of I_BL predictive mode is 66.4%, and the mean value of the selected percentage of all directions predictive mode is 29.3%.Because the selecteed percentage of I_BL predictive mode is considerably beyond the selecteed percentage of other all directions predictive mode, so, can learn that for the I_BL predictive mode, directional prediction modes is to the contribution that improves coding efficiency and do and not very big.
But, the directional prediction modes of 4 * 4 correspondences has 9 kinds, each piece of enhancement layer all carries out predictive coding, calculating at these 9 kinds of predictive modes, its computation complexity and its raising degree to coding efficiency are disproportionate, therefore, the present invention only adopts the directional prediction modes of lesser amt when carrying out the enhancement layer frame inner estimation mode, can not be subjected under the situation of obviously influence at coding efficiency, reduces the computation complexity of determining the current block prediction mode method greatly.
Clear and definite method of the present invention can reduce the computation complexity of determining current macro/block prediction mode method greatly under coding efficiency is not subjected to the situation of obviously influence after, below technical scheme provided by the invention is described in further detail.
The present invention at first needs the determining section directional prediction modes, for 4 * 4 piece in the enhancement layer, the part directional prediction modes can comprise: DC predictive mode, Horizontal predictive mode, Vertical predictive mode, Diagonal down-left predictive mode and five kinds of INTRA predictive modes of Diagonal down-right predictive mode; The part directional prediction modes also can comprise: DC predictive mode, Horizontal predictive mode and three kinds of INTRA predictive modes of Vertical predictive mode.
For 16 * 16 macro block in the enhancement layer or 8 * 8 piece, the part directional prediction modes can comprise: DC predictive mode, Horizontal predictive mode and three kinds of INTRA predictive modes of Vertical predictive mode.
Certainly, the predictive mode that the part directional prediction modes specifically comprises can be not limited to the above-mentioned form that exemplifies, being no matter the part directional prediction modes is quantitatively, or can be not limited to the above-mentioned form that exemplifies on the concrete predictive mode that comprises, also can be the directional prediction modes after improving.
After having determined the part directional prediction modes, with two kinds of concrete implementation methods technical scheme provided by the invention is described below.
Method one: coding side need be encoded to the directional prediction modes information of enhancement layer current macro/piece.Coding side is when carrying out predictive coding to enhancement layer current macro/piece, the predictive coding efficiency measure value of calculating section directional prediction modes and I_BL predictive mode such as RD_cost value respectively, choosing the minimum pairing predictive mode of RD_cost is the intra prediction mode of current macro/piece.
Coding side should be encoded the intra prediction mode of its current macro/piece of determining, and transfers to decoding end, and decoding end can be determined the intra prediction mode of current macro/piece according to the coded message of predictive mode.
Method two: coding side can be encoded to the directional prediction modes information of enhancement layer current macro/piece, also can the directional prediction modes information of enhancement layer current macro/piece not encoded.
If the low layer macroblock/block of enhancement layer current macro/piece and this current macroblock/block correspondence all is the INTRA piece, then can determine the predictive mode of this current macroblock/block according to the predictive mode of this low layer macroblock/block.Above-mentioned low layer macroblock/block is identical in the position of its place frame with current macro/piece in the position of its place frame.At this moment, coding side just need be set up the corresponding relation of all directional prediction modes and part directional prediction modes, promptly sets up the mapping relations of all directional prediction modes and part directional prediction modes.
For 4 * 4 current block in the enhancement layer, 9 kinds of all direction predictions can be mapped as five kinds of predictive modes, as the Vertical predictive mode is mapped as the Vertical predictive mode, the Horizontal predictive mode is mapped as the Horizontal predictive mode, the DC predictive mode is mapped as the DC predictive mode, the DiagonalDown-Left predictive mode is mapped as Diagonal Down-Left predictive mode, Diagonal Down-Right predictive mode is mapped as Diagonal Down-Right predictive mode, the Vertical-Left predictive mode is mapped as the Vertical predictive mode, the Horizontal-Down predictive mode is mapped as the Horizontal predictive mode, the Vertical-Right predictive mode is mapped as the Vertical predictive mode, the Horizontal-Up predictive mode is mapped as the Horizontal mapped mode.
For 4 * 4 current block in the enhancement layer, also 9 kinds of all direction predictions can be mapped as three kinds of predictive modes, as the Vertical predictive mode is mapped as the Vertical predictive mode, the Horizontal predictive mode is mapped as the Horizontal predictive mode, the DC predictive mode is mapped as the DC predictive mode, the DiagonalDown-Left predictive mode is mapped as the Vertical predictive mode, Diagonal Down-Right predictive mode is mapped as the Horizontal predictive mode, the Vertical-Left predictive mode is mapped as the Vertical predictive mode, the Horizontal-Down predictive mode is mapped as the Horizontal predictive mode, the Vertical-Right predictive mode is mapped as the Vertical predictive mode, the Horizontal-Up predictive mode is mapped as the Horizontal predictive mode.
For 16 * 16 current macro in the enhancement layer or 8 * 8 current block, 4 kinds of all direction predictions can be mapped as 3 kinds of predictive modes, be mapped as the Vertical predictive mode being mapped as Vertical predictive mode, Horizontal predictive mode that Horizontal predictive mode, DC predictive mode are mapped as the DC predictive mode, the Plane predictive mode is mapped as the DC predictive mode.
Certainly, the mapping relations of part directional prediction modes and all directional prediction modes are not limited to the above-mentioned form that exemplifies.
After having determined above-mentioned mapping relations, when coding side is the INTRA piece in the low layer macroblock/block of determining enhancement layer current macro/piece and the current macro/correspondence of determining, should obtain the prediction mode information of low layer macroblock/block, determine the predictive mode of low layer macroblock/block, then, determine the predictive mode of the predictive mode mapping of this low layer macroblock/block according to above-mentioned mapping relations, calculate the predictive coding efficiency measure value such as the RD_cost value of the predictive mode and the I BL predictive mode of this mapping respectively, choosing the minimum pairing predictive mode of RD_cost is the intra prediction mode of current macro/piece.
In the method, coding side also can be directly be defined as the intra prediction mode of enhancement layer current macro/piece with the predictive mode of the predictive mode mapping of low layer macroblock/block.
Coding side is behind the intra prediction mode of having determined enhancement layer current macro/piece, can encode to this predictive mode, and transfer to decoding end, like this, decoding end just can directly be determined the predictive mode of enhancement layer current macro/piece according to the coded message of predictive mode.When coding side is defined as the intra prediction mode of enhancement layer current macro/piece at the direct predictive mode that the predictive mode of low layer macroblock/block is shone upon, can this predictive mode not encoded yet, like this, decoding end also adopt with said method two in the coding side method that directly predictive mode of the predictive mode of low layer macroblock/block mapping is defined as the intra prediction mode of enhancement layer current macro/piece determine the intra prediction mode of enhancement layer current macro/piece.
Definite enhancement layer frame inner estimation mode module in the coding/decoding apparatus provided by the invention is shown in accompanying drawing 6 and accompanying drawing 7.
In Fig. 6, determine that enhancement layer frame inner estimation mode module mainly comprises: storage area information submodule, calculate predictive coding efficiency measure value submodule, determine submodule 1.
Storage area information submodule is mainly used in the part directional prediction modes information that storage is chosen from all directional prediction modes of enhancement layer current macro/piece correspondence.The part directional prediction modes of storing in the storage area information submodule can be five kinds or three kinds, also can be other quantity, and the description in predictive mode that the part directional prediction modes specifically comprises such as the above-mentioned method no longer describes in detail at this.
Calculate predictive coding efficiency measure value submodule and be mainly used in predictive coding efficiency measure value such as the RD_cost value of determining current macro/piece correspondence according to the predictive mode of storing in the storage area information submodule, I_BL predictive mode respectively.
Determine that submodule 1 is mainly used in according to calculating each predictive coding efficiency measure value that predictive coding efficiency measure value submodule determines and choose minimum predictive coding efficiency measure value, and the predictive mode of the predictive coding efficiency measure value correspondence of minimum is defined as the intra prediction mode of enhancement layer current macro/piece.
In Fig. 7, determine that enhancement layer frame inner estimation mode module mainly comprises: store the corresponding relation submodule, determine low layer predictive mode submodule, determine submodule 2.
Storage corresponding relation submodule is mainly used in the corresponding relation of all directional prediction modes of storage and part directional prediction modes.The part directional prediction modes here can be five kinds or three kinds, also can be other quantity, description in predictive mode that the part directional prediction modes specifically comprises such as the above-mentioned method, description in the corresponding relation of part directional prediction modes and all directional prediction modes such as the above-mentioned method no longer describes in detail at this.
Determine that low layer predictive mode submodule is mainly used in the low layer macroblock/block of determining enhancement layer current macro/piece correspondence, and determine the predictive mode of this low layer macroblock/block.
Determine that submodule 2 at first needs to determine according to stored relation in the predictive mode of determining the low layer macroblock/block that low layer predictive mode submodule is determined, the storage corresponding relation submodule predictive mode of the predictive mode mapping of low layer macroblock/block, then, determine the predictive coding efficiency measure value such as the RD_cost value of current macro/piece correspondence respectively according to the predictive mode, I_BL predictive mode of mapping, and the predictive mode of the predictive coding efficiency measure value correspondence of minimum is defined as the intra prediction mode of enhancement layer current macro/piece.
Determine that submodule 2 also can not carry out the calculating of above-mentioned predictive coding efficiency measure value, the direct predictive mode that the predictive mode of low layer macroblock/block is shone upon is defined as the intra prediction mode of enhancement layer current macro/piece.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, and the claim of application documents of the present invention comprises these distortion and variation.
Claims (11)
1, a kind of method of definite enhancement layer frame inner estimation mode is characterized in that, comprising:
Determine the intra prediction mode of enhancement layer current macro/piece according to the part directional prediction modes.
2, the method for a kind of definite enhancement layer frame inner estimation mode as claimed in claim 1, it is characterized in that described current macro/piece is: 16 * 16 based on the macro block of the intra-frame encoding mode in the video coding or 8 * 8 based on the piece of the intra-frame encoding mode in the video coding or 4 * 4 piece based on the intra-frame encoding mode in the video coding.
3, the method for a kind of definite enhancement layer frame inner estimation mode as claimed in claim 1 is characterized in that, described method specifically comprises:
A, from all directional prediction modes of enhancement layer current macro/piece correspondence the selected part directional prediction modes;
B, coding side are determined the predictive coding efficiency measure value of current macro/piece correspondence respectively according to described part directional prediction modes, I_BL predictive mode;
C, coding side are defined as the predictive mode of minimum predictive coding efficiency measure value correspondence the intra prediction mode of enhancement layer current macro/piece.
4, the method for a kind of definite enhancement layer frame inner estimation mode as claimed in claim 1 is characterized in that, described method specifically comprises:
A ', set up the corresponding relation of all directional prediction modes and part directional prediction modes;
B ', when enhancement layer current macro/piece and its corresponding low layer macroblock/block are piece based on the intra-frame encoding mode in the video coding, coding side/decoding end is determined the predictive mode of the low layer macroblock/block of enhancement layer current macro/piece correspondence;
C ', coding side/decoding end are determined the intra prediction mode of current macro/piece according to the predictive mode of described low layer macroblock/block, described corresponding relation.
5, the method for a kind of definite enhancement layer frame inner estimation mode as claimed in claim 4 is characterized in that, described step c ' is specially:
Coding side/decoding end according to described corresponding relation with the predictive mode of the predictive mode correspondence of described low layer macroblock/block intra prediction mode as current macro/piece; Or
Coding side is determined the predictive mode of the predictive mode correspondence of described low layer macroblock/block according to described corresponding relation;
Coding side is according to the predictive mode of described correspondence, the predictive coding efficiency measure value that the I_BL predictive mode is determined current macro/piece correspondence respectively;
Coding side is defined as the predictive mode of minimum predictive coding efficiency measure value correspondence the predictive mode of enhancement layer current macro/piece.
As the method for claim 3 or 4 or 5 described a kind of definite enhancement layer frame inner estimation modes, it is characterized in that 6, described method also comprises:
Coding side is encoded to the intra prediction mode of described definite current macro/piece, and the coded message of described intra prediction mode is transferred to decoding end;
Described decoding end is determined the intra prediction mode of enhancement layer current macro/piece according to the coded message of the intra prediction mode of current macro/piece.
7, as the method for claim 3 or 4 or 5 described a kind of definite enhancement layer frame inner estimation modes, it is characterized in that:
Described current macro/piece be 16 * 16 based on the macro block of the intra-frame encoding mode in the video coding or 8 * 8 based on the piece of the intra-frame encoding mode in the video coding time, all directional prediction modes of current macro/piece correspondence comprise: the infra-frame prediction of DC predictive mode, vertical predictive mode, horizontal predictive mode, Plane predictive mode;
Described current block be 4 * 4 based on the piece of the intra-frame encoding mode in the video coding time, all directional prediction modes of current block correspondence comprise: Vertical predictive mode, Horizontal predictive mode, DC predictive mode, Diagonal Down-Left predictive mode, Diagonal Down-Right predictive mode, Vertical-Left predictive mode, Horizontal-Down predictive mode, Vertical-Right predictive mode, Horizontal-Up predictive mode;
And described part directional prediction modes comprises: DC predictive mode, Horizontal predictive mode and Vertical predictive mode; Or
Described part directional prediction modes comprises: DC predictive mode, Horizontal predictive mode, Vertical predictive mode, Diagonal down-left predictive mode and Diagonal down-right predictive mode.
8, the method for a kind of definite enhancement layer frame inner estimation mode as claimed in claim 7 is characterized in that, described step a ' specifically comprises:
Set the corresponding Vertical predictive mode of Vertical predictive mode, the corresponding Horizontal predictive mode of Horizontal predictive mode, the corresponding DC predictive mode of DC predictive mode, the corresponding Diagonal Down-Left of Diagonal Down-Left predictive mode predictive mode, the corresponding Diagonal Down-Right of Diagonal Down-Right predictive mode predictive mode, the corresponding Vertical predictive mode of Vertical-Left predictive mode, the corresponding Horizontal predictive mode of Horizontal-Down predictive mode, the corresponding Vertical predictive mode of Vertical-Right predictive mode, the corresponding Horizontal predictive mode of Horizontal-Up predictive mode; Or
Set the corresponding Vertical predictive mode of Vertical predictive mode, the corresponding Horizontal predictive mode of Horizontal predictive mode, the corresponding DC predictive mode of DC predictive mode, the corresponding Vertical predictive mode of Diagonal Down-Left predictive mode, the corresponding Horizontal predictive mode of Diagonal Down-Right predictive mode, the corresponding Vertical predictive mode of Vertical-Left predictive mode, the corresponding Horizontal predictive mode of Horizontal-Down predictive mode, the corresponding Vertical predictive mode of Vertical-Right predictive mode, the corresponding Horizontal predictive mode of Horizontal-Up predictive mode; Or
Set the corresponding Vertical predictive mode of Vertical predictive mode, the corresponding Horizontal predictive mode of Horizontal predictive mode, the corresponding DC predictive mode of DC predictive mode, the corresponding DC predictive mode of Plane predictive mode.
9, a kind of coding/decoding apparatus is provided with and determines enhancement layer frame inner estimation mode module, it is characterized in that:
Described enhancement layer frame inner estimation mode module: the intra prediction mode of determining enhancement layer current macro/piece in the part directional prediction modes from all directional prediction modes of enhancement layer current macro/piece correspondence.
10, a kind of coding/decoding apparatus as claimed in claim 9 is characterized in that, described enhancement layer frame inner estimation mode module comprises:
Storage area information submodule: the part directional prediction modes information that storage is chosen from all directional prediction modes of enhancement layer current macro/piece correspondence;
Calculate predictive coding efficiency measure value submodule: the predictive coding efficiency measure value of determining current macro/piece correspondence according to described part directional prediction modes, I_BL predictive mode respectively;
Determine submodule 1: the predictive mode that the predictive mode of minimum predictive coding efficiency measure value correspondence is defined as enhancement layer current macro/piece.
11, a kind of coding/decoding apparatus as claimed in claim 9 is characterized in that, described enhancement layer frame inner estimation mode module comprises:
Storage corresponding relation submodule: the corresponding relation of storing all directional prediction modes and part directional prediction modes;
Determine low layer predictive mode submodule: determine the predictive mode of the low layer macroblock/block of enhancement layer current macro/piece correspondence, and determine the predictive mode of the predictive mode correspondence of low layer macroblock/block according to described corresponding relation;
Determine submodule 2: the predictive mode of determining enhancement layer current macro/piece according to the predictive mode of the predictive mode correspondence of described low layer macroblock/block.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102196257A (en) * | 2010-03-11 | 2011-09-21 | 中国科学院微电子研究所 | Method and device for prejudging macroblock coding mode |
| CN105338345A (en) * | 2011-10-24 | 2016-02-17 | 英孚布瑞智有限私人贸易公司 | Method and apparatus for image decoding |
| CN106998470A (en) * | 2016-01-25 | 2017-08-01 | 华为技术有限公司 | Coding/decoding method, coding method, decoding device and encoding device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102196257A (en) * | 2010-03-11 | 2011-09-21 | 中国科学院微电子研究所 | Method and device for prejudging macroblock coding mode |
| CN102196257B (en) * | 2010-03-11 | 2014-02-12 | 中国科学院微电子研究所 | Method and device for prejudging macroblock coding mode |
| CN105338345A (en) * | 2011-10-24 | 2016-02-17 | 英孚布瑞智有限私人贸易公司 | Method and apparatus for image decoding |
| CN105338345B (en) * | 2011-10-24 | 2019-01-04 | 英孚布瑞智有限私人贸易公司 | Method and apparatus for image decoding |
| CN106998470A (en) * | 2016-01-25 | 2017-08-01 | 华为技术有限公司 | Coding/decoding method, coding method, decoding device and encoding device |
| WO2017129023A1 (en) * | 2016-01-25 | 2017-08-03 | 华为技术有限公司 | Decoding method, encoding method, decoding apparatus, and encoding apparatus |
| CN106998470B (en) * | 2016-01-25 | 2020-03-20 | 华为技术有限公司 | Decoding method, encoding method, decoding apparatus, and encoding apparatus |
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