CN106534871B - The coding method of Video Codec and coding/decoding method - Google Patents
The coding method of Video Codec and coding/decoding method Download PDFInfo
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- CN106534871B CN106534871B CN201611108487.0A CN201611108487A CN106534871B CN 106534871 B CN106534871 B CN 106534871B CN 201611108487 A CN201611108487 A CN 201611108487A CN 106534871 B CN106534871 B CN 106534871B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
- H04N19/51—Motion estimation or motion compensation
- H04N19/573—Motion compensation with multiple frame prediction using two or more reference frames in a given prediction direction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/13—Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
- H04N19/51—Motion estimation or motion compensation
- H04N19/57—Motion estimation characterised by a search window with variable size or shape
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Abstract
The embodiment of the invention provides a kind of coding method of Video Codec and coding/decoding methods.The coding method of the Video Codec, comprising: obtain the corresponding building reference frame of the corresponding former frame encoded image of encoded image of the former frame of current image to be encoded and the current image to be encoded；Update the corresponding building reference frame of the former frame encoded image according to the encoded image, will the corresponding building reference frame of the updated former frame encoded image as the corresponding building reference frame of the corresponding image currently to be encoded of the currently image to be encoded；Using the corresponding building reference frame of the corresponding current image to be encoded of the current image to be encoded as reference picture, the currently image to be encoded is encoded.The present invention can be improved encoding and decoding performance.
Description
Technical field
The present invention relates to the video coding and decoding technology fields belonged in digital media processing technology more particularly to video to compile solution
The coding method of code device and coding/decoding method.
Background technique
Existing method for video coding is usually using the image of encoded mistake as reference frame.In view of existing in cataloged procedure
Quantization loss, the not necessarily most reference value of pixel value included in reference frame；Meanwhile the selection of reference frame is not
There is the great amount of images information for making full use of front encoded.Therefore, the prediction to current image some regions to be encoded and it is not allowed
Really, cause coding efficiency low.
Summary of the invention
The embodiment provides a kind of coding method of Video Codec and coding/decoding methods, can be improved volume solution
Code performance.
A kind of coding method of Video Codec, comprising:
Before the encoded image of the former frame of the current image to be encoded of acquisition and the current image to be encoded is corresponding
The corresponding building reference frame of one frame encoded image；The building reference frame is the front cross frame according to the current image to be encoded
Encoded image and the corresponding forecast image of the front cross frame encoded image generate；
The corresponding building reference frame of the former frame encoded image is updated according to the encoded image, it will be updated
The corresponding building reference frame of the former frame encoded image is as the corresponding current figure to be encoded of the current image to be encoded
As corresponding building reference frame；
Using the corresponding building reference frame of the corresponding current image to be encoded of the current image to be encoded as reference picture,
The current image to be encoded is encoded.
It is described that the corresponding building reference frame of the former frame encoded image is updated according to the encoded image, it will update
The corresponding building reference frame of the former frame encoded image afterwards is corresponding currently wait compile as the current image to be encoded
The step of code image corresponding building reference frame includes:
According to the relationship between forecast image corresponding to the current encoded image and the current encoded image,
Calculate the coded residual of each location of pixels of the current encoded image；
According to the coded residual of each location of pixels of the current encoded image, to the former frame encoded image
The pixel value of each location of pixels of corresponding building reference frame is handled, and generates that described current image to be encoded is corresponding works as
The corresponding building reference frame of preceding image to be encoded.
The coded residual of each location of pixels according to the current encoded image, it is encoded to the former frame
The pixel value of each location of pixels of the corresponding building reference frame of image is handled, and it is corresponding to generate the current image to be encoded
Current image to be encoded corresponding building reference frame the step of include:
Step a, judges whether the coded residual of the current pixel position of the current encoded image is less than threshold value；Work as institute
State judging result be less than when, then jump to step b, otherwise, jump to step c；
Step b updates the pixel value of the current pixel position of the corresponding building reference frame of the former frame encoded image；
Step c does not update the pixel of the current pixel position of the corresponding building reference frame of the former frame encoded image
Value；
According to step a- step c, each location of pixels of building reference frame corresponding to the former frame encoded image
Pixel value handled, generate the corresponding building reference frame of current image to be encoded.
Before the step a, the method also includes:
Judge whether the place predicting unit of the current pixel position of the current encoded image uses skip mode to compile
Code；
When the judging result, which is, is, then step c is jumped to；Otherwise, step a is jumped to.
The step of current pixel position for updating the corresponding building reference frame of the former frame encoded image includes:
By the pixel value of the current pixel position of the current encoded image and the former frame encoded image
Being weighted in corresponding building reference frame with the pixel value of the current pixel position corresponding position, generates and calculates knot
Fruit；
Using the calculated result, the current picture of the corresponding building reference frame of the former frame encoded image is updated
The pixel value of plain position corresponding position.
When the current image to be encoded is first frame, the image of the former frame of the current image to be encoded is corresponding
The value of the corresponding building reference frame of former frame encoded image is set as 0.
The pixel value of the current pixel position by the current encoded image and the former frame are encoded
Being weighted in the corresponding building reference frame of image with the pixel value of the current pixel position corresponding position, generates and calculates
As a result the step of includes:
P `R(i, j)=PR(i,j)*w1+Prec(i,j)*w2
Wherein, (i, j) is current pixel position, Prec(i, j) is the pixel of the current pixel position of current encoded image
Value, PR(i, j) is the pixel value of the current pixel position of the corresponding building reference frame of former frame encoded image；P `R(i, j) is
Calculated result；w1With w2Respectively the first weight and the second weight, w1+ w2=1.
A kind of coding/decoding method of Video Codec, comprising:
Before the image of decoding of the former frame of the current image to be decoded of acquisition and the current image to be decoded is corresponding
One frame has decoded the corresponding building reference frame of image；The building reference frame is the front cross frame according to the current image to be decoded
The corresponding forecast image of the image of decoding for having decoded image and the front cross frame generate；
It has decoded former frame described in image update according to described and has decoded the corresponding building reference frame of image, it will be updated
The former frame has decoded the corresponding building reference frame of image as the corresponding building reference frame of the current image to be decoded；
Using the corresponding building reference frame of the current image to be decoded as reference picture, to the currently image to be decoded
It is decoded.
It is described to have decoded former frame described in image update according to and decoded the corresponding building reference frame of image, it will update
The former frame afterwards has decoded the corresponding building reference frame of image and has referred to as the corresponding building of the current image to be decoded
The step of frame includes:
Image and the relationship currently decoded between forecast image corresponding to image have currently been decoded according to described,
Calculate the decoded residual of each location of pixels for currently having decoded image；
According to the decoded residual of each location of pixels for currently having decoded image, image has been decoded to the former frame
The pixel value of each location of pixels of corresponding building reference frame is handled, and the corresponding structure of the image currently to be decoded is generated
Build reference frame.
The decoded residual according to each location of pixels for currently having decoded image, has decoded the former frame
The pixel value of each location of pixels of the corresponding building reference frame of image is handled, and it is corresponding to generate the current image to be decoded
Building reference frame the step of include:
Step a, judges whether the decoded residual of the current pixel position for currently having decoded image is less than threshold value；Work as institute
State judging result be less than when, then jump to step b, otherwise, jump to step c；
Step b updates the pixel value that the former frame has decoded the current pixel position of the corresponding building reference frame of image；
Step c does not update the pixel that the former frame has decoded the current pixel position of the corresponding building reference frame of image
Value；
According to step a- step c, each location of pixels of the corresponding building reference frame of image has been decoded to the former frame
Pixel value handled, generate the corresponding building reference frame of current image to be decoded.
Before the step a, the method also includes:
Judge whether the place predicting unit of the current pixel position for currently having decoded image uses skip mode solution
Code；
When the judging result, which is, is, then step c is jumped to；Otherwise, step a is jumped to.
It is described to update the step of former frame has decoded the current pixel position of the corresponding building reference frame of image and include:
The pixel value of the current pixel position for currently having decoded image and the former frame image has been decoded into
Being weighted in corresponding building reference frame with the pixel value of the current pixel position corresponding position, generates and calculates knot
Fruit；
Using the calculated result, the current picture that the former frame has decoded the corresponding building reference frame of image is updated
The pixel value of plain position corresponding position.
When the current image to be decoded is first frame, the image of the former frame of the current image to be decoded is corresponding
The value that former frame has decoded the corresponding building reference frame of image is set as 0.
The pixel value by the current pixel position for currently having decoded image has been decoded with the former frame
Being weighted in the corresponding building reference frame of image with the pixel value of the current pixel position corresponding position, generates and calculates
As a result the step of includes:
P `R(i, j)=PR(i,j)*w1+Prec(i,j)*w2
Wherein, (i, j) is current pixel position, Prec(i, j) is the pixel for currently having decoded the current pixel position of image
Value, PR(i, j) is the pixel value for the current pixel position that former frame has decoded the corresponding building reference frame of image；P `R(i, j) is
Calculated result；w1With w2Respectively the first weight and the second weight, w1+ w2=1.
As can be seen from the technical scheme provided by the above-mentioned embodiment of the present invention, in the embodiment of the present invention, reference frame is constructed
Selection utilization front encoding and decoding image information, can be improved encoding and decoding performance.
The additional aspect of the present invention and advantage will be set forth in part in the description, these will become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without any creative labor, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of schematic diagram of the coding method for Video Codec that the embodiment of the present invention one provides；
Fig. 2 is a kind of schematic diagram of the coding/decoding method for Video Codec that the embodiment of the present invention one provides；
Fig. 3 be the embodiment of the present invention described in Video Codec coding method in construct reference frame generation with it is adaptive
Answer the schematic diagram of update method；
Fig. 4 be the embodiment of the present invention described in Video Codec coding/decoding method in construct reference frame generation with it is adaptive
Answer the schematic diagram of update method.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
In order to facilitate understanding of embodiments of the present invention, it is done by taking several specific embodiments as an example below in conjunction with attached drawing further
Explanation, and each embodiment does not constitute the restriction to the embodiment of the present invention.
As shown in Figure 1, being a kind of coding method of Video Codec of the present invention, comprising:
Step 11, the encoded image pair of the former frame of current image to be encoded and the current image to be encoded is obtained
The corresponding building reference frame of the former frame encoded image answered；The building reference frame is according to the current image to be encoded
The corresponding forecast image of the encoded image of the encoded image of front cross frame and the front cross frame generates；When described current to be encoded
When image is first frame, the corresponding structure of the corresponding former frame encoded image of image of the former frame of the current image to be encoded
The value for building reference frame is set as 0.
Step 12, the corresponding building reference frame of the former frame encoded image is updated according to the encoded image, it will
The corresponding building reference frame of the updated former frame encoded image is corresponding current as the current image to be encoded
The corresponding building reference frame of image to be encoded；
Step 13, using the corresponding building reference frame of the corresponding current image to be encoded of the current image to be encoded as joining
Image is examined, the current image to be encoded is encoded.
In the present invention, the present invention does not use directly a certain encoded image as reference frame, and uses following calculations
Method constructs a completely new reference frame, improves encoding characteristics.
Step 12 includes:
Step 121, the forecast image according to corresponding to the current encoded image and the current encoded image it
Between relationship, calculate the coded residual of each location of pixels of the current encoded image；Coded residual, that is, encoded image
Difference between corresponding forecast image.
Step 122, according to the coded residual of each location of pixels of the current encoded image, to the former frame
The pixel value of each location of pixels of the corresponding building reference frame of coded image is handled, and the current image to be encoded is generated
The corresponding building reference frame of corresponding current image to be encoded.
In one embodiment, step 122 includes:
Step a, judges whether the coded residual of the current pixel position of the current encoded image is less than threshold value；Work as institute
State judging result be less than when, then jump to step b, otherwise, jump to step c；
Step b updates the pixel value of the current pixel position of the corresponding building reference frame of the former frame encoded image；
Step c does not update the pixel of the current pixel position of the corresponding building reference frame of the former frame encoded image
Value；
According to step a- step c, each location of pixels of building reference frame corresponding to the former frame encoded image
Pixel value handled, generate the corresponding building reference frame of current image to be encoded.
Step b includes:
Step b1 has compiled the pixel value of the current pixel position of the current encoded image with the former frame
Being weighted in the corresponding building reference frame of code image with the pixel value of the current pixel position corresponding position, generates meter
Calculate result；The pixel value and the encoded figure of the former frame of the current pixel position by the current encoded image
As being weighted with the pixel value of the current pixel position corresponding position in corresponding building reference frame, generates and calculate knot
The step of fruit includes:
P `R(i, j)=PR(i,j)*w1+Prec(i,j)*w2
Wherein, (i, j) is current pixel position, Prec(i, j) is the pixel of the current pixel position of current encoded image
Value, PR(i, j) is the pixel value of the current pixel position of the corresponding building reference frame of former frame encoded image；P `R(i, j) is
Calculated result；w1With w2Respectively the first weight and the second weight, w1+ w2=1.
Step b2 updates the institute of the corresponding building reference frame of the former frame encoded image using the calculated result
State the pixel value of current pixel position corresponding position.
In another embodiment, step 122 includes:
Step a judges whether the place predicting unit of the current pixel position of the current encoded image uses and skips
Pattern-coding；
Step b, judges whether the coded residual of the current pixel position of the current encoded image is less than threshold value；Work as institute
State judging result be less than when, then jump to step c, otherwise, jump to step d；
Step c updates the pixel value of the current pixel position of the corresponding building reference frame of the former frame encoded image；
Step d does not update the pixel of the current pixel position of the corresponding building reference frame of the former frame encoded image
Value；
According to step a- step d, each location of pixels of building reference frame corresponding to the former frame encoded image
Pixel value handled, generate the corresponding building reference frame of current image to be encoded.
As shown in Fig. 2, being a kind of coding/decoding method of Video Codec of the present invention, comprising:
Step 21, the decoding image pair of the former frame of current image to be decoded and the current image to be decoded is obtained
The former frame answered has decoded the corresponding building reference frame of image；The building reference frame is according to the current image to be decoded
The corresponding forecast image of the image of decoding for having decoded image and the front cross frame of front cross frame generates；When described current to be decoded
When image is first frame, the corresponding former frame of image of the former frame of the current image to be decoded has decoded the corresponding structure of image
The value for building reference frame is set as 0.
Step 22, it has decoded former frame described in image update according to described and has decoded the corresponding building reference frame of image, it will
The updated former frame has decoded the corresponding building reference frame of image as the corresponding building of the current image to be decoded
Reference frame；
Step 23, using the corresponding building reference frame of the current image to be decoded as reference picture, to it is described currently to
Decoding image is decoded.
Step 22 includes:
Step 221, according to it is described currently decoded image and it is described currently decoded forecast image corresponding to image it
Between relationship, calculate it is described currently decoded image each location of pixels decoded residual；
Step 222, according to the decoded residual of each location of pixels for currently having decoded image, to the former frame
The pixel value of each location of pixels of the corresponding building reference frame of decoding image is handled, and the current image to be decoded is generated
Corresponding building reference frame.
In one embodiment, step 222 includes:
Step a, judges whether the decoded residual of the current pixel position for currently having decoded image is less than threshold value；Work as institute
State judging result be less than when, then jump to step b, otherwise, jump to step c；
Step b updates the pixel value that the former frame has decoded the current pixel position of the corresponding building reference frame of image；
Step c does not update the pixel that the former frame has decoded the current pixel position of the corresponding building reference frame of image
Value；
According to step a- step c, each location of pixels of the corresponding building reference frame of image has been decoded to the former frame
Pixel value handled, generate the corresponding building reference frame of current image to be decoded.
In another embodiment, step 222 includes:
Step a judges whether the place predicting unit of the current pixel position for currently having decoded image uses and skips
Mode decoding；When the judging result, which is, is, then step c is jumped to；Otherwise, step a is jumped to.
Step b, judges whether the decoded residual of the current pixel position for currently having decoded image is less than threshold value；Work as institute
State judging result be less than when, then jump to step c, otherwise, jump to step d；
Step c updates the pixel value that the former frame has decoded the current pixel position of the corresponding building reference frame of image；
Step d does not update the pixel that the former frame has decoded the current pixel position of the corresponding building reference frame of image
Value；
According to step a- step d, each location of pixels of the corresponding building reference frame of image has been decoded to the former frame
Pixel value handled, generate the corresponding building reference frame of current image to be decoded.
Step c includes:
Step c1 has solved the pixel value of the current pixel position for currently having decoded image with the former frame
Being weighted in the corresponding building reference frame of code image with the pixel value of the current pixel position corresponding position, generates meter
Calculate result；The pixel value and former frame decoding figure by the current pixel position for currently having decoded image
As being weighted with the pixel value of the current pixel position corresponding position in corresponding building reference frame, generates and calculate knot
The step of fruit includes: P `R(i, j)=PR(i,j)*w1+Prec(i,j)*w2；
Wherein, (i, j) is current pixel position, Prec(i,j)For currently decoded image current pixel position pixel
Value, PR(i, j) is the pixel value for the current pixel position that former frame has decoded the corresponding building reference frame of image；P `R(i, j) is
Calculated result；w1With w2Respectively the first weight and the second weight, w1+ w2=1.
Step c2 updates the institute that the former frame has decoded the corresponding building reference frame of image using the calculated result
State the pixel value of current pixel position corresponding position.
Application scenarios of the invention are described below.
The present invention provides the generation and adaptive updates method that reference frame is constructed in a kind of Video Codec.
In an encoding process, firstly, generating building reference frame using encoded image information；Then, building is referred to
Each pixel of frame carries out dynamic self-adapting update；Then, the image to be encoded of subsequent input can alternatively be used the building
Reference frame carries out predictive coding as reference picture.
Correspondingly, in decoding process, firstly, generating building reference frame using the decoded image information of preamble；Then,
Dynamic self-adapting update is carried out to each pixel of building reference frame；Then, the building is chosen to join when subsequent image to be decoded
When examining frame, the building reference frame is used to be decoded as reference picture.
The following specifically describes:
The present invention proposes generation and adaptive updates method that reference frame is constructed in a kind of Video Codec.This method packet
It includes:
When cataloged procedure starts, building reference frame is generated using encoded image information；
Each pixel value for constructing reference frame is 0；
In an encoding process, according to the relationship between the corresponding forecast image of encoded image, each pixel is analyzed
The coded residual of position；
According to coded residual, judge whether the current pixel position for constructing reference frame needs to update；
Building reference frame by update carries out predictive coding as the reference picture of the image to be encoded of subsequent input.
That is, the original pixel values of building reference frame are all 0；With the progress of cataloged procedure, pixel value therein
It can constantly update；Update principle are as follows: carry out judging whether to need to update according to coded residual；If updating, new picture is calculated
Plain value simultaneously replaces the pixel value that the position is original in building reference frame.
Above-mentioned steps specifically: when cataloged procedure starts, each pixel value for constructing reference frame R is initialized as 0.When the 0th
After the completion of frame coding, the reconstruction image of the 0th frame and the relationship of forecast image are analyzed, residual error between the two is obtained.To each pixel
The residual error of position is analyzed；When residual absolute value is less than threshold θ, it is believed that the location of pixels for constructing reference frame needs more
Newly, it does not otherwise need.For the location of pixels for needing to update in building reference frame, new calculated for pixel values is as follows:
PR(i, j)=PR(i,j)*w1+Prec(i,j)*w2
Wherein, (i, j) is the position of current pixel, PrecFor encoded image (reconstruction image), w1With w2For weight.
It is corresponding, in decoding process, which comprises
When decoding process starts, building each pixel value of reference frame is 0；
When decoding process starts, according to the relationship between the corresponding forecast image of current decoded image, analysis
The coded residual of each location of pixels；
According to coded residual, judge to construct whether reference frame current pixel position needs to update；
It is decoded by the building reference frame of update as the reference picture of subsequent image to be decoded.
In a kind of Video Codec proposed by the present invention in the generation of reference frame and adaptive updates method, building is updated
The step of reference frame specifically:
In an encoding process, for the location of pixels for needing to update in building reference frame, using corresponding in encoded image
The pixel value of position and the pixel value of the position in building reference frame are weighted, and calculated result is as in building reference frame
The new pixel value in the position.
Correspondingly, constructing generation and the adaptive updates side of reference frame in a kind of Video Codec proposed by the present invention
Method updates the step of constructing reference frame specifically:
In decoding process, for the location of pixels that needs to update in building reference frame, using currently having decoded in image
The pixel value of corresponding position and the pixel value of the position in building reference frame are weighted, and calculated result is as building reference
The new pixel value in the position in frame.
In the generation and adaptive updates method for constructing reference frame in a kind of Video Codec proposed by the present invention, compiling
During code, when predicting unit where the location of pixels of encoded image is using skip mode coding, construct in reference frame
The location of pixels is without updating.
Correspondingly, constructing the generation and adaptive updates method of reference frame in a kind of Video Codec proposed by the present invention
In, in an encoding process, when predicting unit where currently having decoded the location of pixels of image is using skip mode coding, building
The location of pixels in reference frame is without updating.
As shown in figure 3, currently to encode to the 3rd frame, building reference frame R is generated using the 0th, 1,2 frame, and by the 3rd
Frame is used for inter-reference.As shown in figure 4, building reference frame is to constantly update, and it makes use of it with the progress of cataloged procedure
The information of preceding encoded excessively all images.
The realization platform of the example is HM16.1, and basic configuration is as shown in table 1, and test result is as shown in table 2.
Table 1:
2 this method of table and HM16.1 coding efficiency Comparative result
| Sequence sequence | Y-component | U component | V component |
| Video sequence 1 (576p) | - 0.9% | - 3.5% | - 5.2% |
| Video sequence 2 (720p) | - 1.6% | - 2.0% | - 2.0% |
| Video sequence 3 (480p) | - 1.3% | - 2.3% | - 2.9% |
| Video sequence 4 (1080p) | - 1.0% | - 0.8% | - 0.7% |
| Average average value | - 1.20% | - 2.15% | - 2.70% |
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of protection of the claims
Subject to.
Claims (8)
1. a kind of coding method of Video Codec characterized by comprising
Obtain the corresponding building reference of former frame encoded image of current image to be encoded and the current image to be encoded
Frame；The building reference frame is encoded according to the front cross frame encoded image of the current image to be encoded and the front cross frame
The corresponding forecast image of image generates；
The corresponding building reference frame of the former frame encoded image is updated according to the encoded image, it will be updated described
Reference frame is constructed as the corresponding building reference frame of the current image to be encoded, comprising: according to the current encoded image
With the relationship between forecast image corresponding to the current encoded image, each picture of the current encoded image is calculated
The coded residual of plain position；
It is corresponding to the former frame encoded image according to the coded residual of each location of pixels of the current encoded image
The pixel value of each location of pixels of building reference frame handled, generate the corresponding building of the current image to be encoded and join
Examine frame；
The corresponding building reference frame of the current image to be encoded is regard as reference picture, to the image progress currently to be encoded
Coding.
2. the method according to claim 1, wherein each pixel according to the current encoded image
The coded residual of position, it is corresponding to the former frame encoded image building reference frame each location of pixels pixel value into
Row processing, the step of generating the current image to be encoded corresponding building reference frame include:
Step a, judges whether the coded residual of the current pixel position of the current encoded image is less than threshold value；Sentence when described
Disconnected result be less than when, then jump to step b, otherwise, jump to step c；
Step b updates the pixel value of the current pixel position of the corresponding building reference frame of the former frame encoded image；
Step c does not update the pixel value of the current pixel position of the corresponding building reference frame of the former frame encoded image；
According to step a- step c, the picture of each location of pixels of building reference frame corresponding to the former frame encoded image
Plain value is handled, and the corresponding building reference frame of current image to be encoded is generated.
3. according to the method described in claim 2, it is characterized in that, before the step a, the method also includes:
Judge whether the place predicting unit of the current pixel position of the current encoded image uses skip mode to encode；
When the judging result, which is, is, then step c is jumped to；Otherwise, step a is jumped to.
4. according to the method in claim 2 or 3, which is characterized in that the update former frame encoded image is corresponding
Building reference frame current pixel position the step of include:
The pixel value of the current pixel position of the current encoded image is corresponding with the former frame encoded image
Building reference frame in be weighted with the pixel value of the current pixel position corresponding position, generate calculated result；
Using the calculated result, the current pixel position of the corresponding building reference frame of the former frame encoded image is updated
Set the pixel value of corresponding position.
5. a kind of coding/decoding method of Video Codec characterized by comprising
Obtain the corresponding former frame of the image of decoding of the former frame of current image to be decoded and the current image to be decoded
The corresponding building reference frame of image is decoded；The building reference frame be according to the front cross frame of the current image to be decoded
The corresponding forecast image of the image of decoding for decoding image and the front cross frame generates；
It has decoded former frame described in image update according to described and has decoded the corresponding building reference frame of image, it will be updated described
Former frame has decoded the corresponding building reference frame of image as the corresponding building reference frame of the current image to be decoded, comprising:
According to it is described currently decoded image and it is described currently decoded relationship between forecast image corresponding to image, described in calculating
The decoded residual of each location of pixels of image is currently decoded；
According to the decoded residual of each location of pixels for currently having decoded image, it is corresponding that image has been decoded to the former frame
The pixel value of each location of pixels of building reference frame handled, generate the corresponding building of the current image to be decoded and join
Examine frame；
The corresponding building reference frame of the current image to be decoded is regard as reference picture, to the image progress currently to be decoded
Decoding.
6. according to the method described in claim 5, it is characterized in that, described according to each pixel for currently having decoded image
The decoded residual of position, to the former frame decoded image it is corresponding building reference frame each location of pixels pixel value into
Row processing, the step of generating the current image to be decoded corresponding building reference frame include:
Step a, judges whether the decoded residual of the current pixel position for currently having decoded image is less than threshold value；Sentence when described
Disconnected result be less than when, then jump to step b, otherwise, jump to step c；
Step b updates the pixel value that the former frame has decoded the current pixel position of the corresponding building reference frame of image；
Step c does not update the pixel value that the former frame has decoded the current pixel position of the corresponding building reference frame of image；
According to step a- step c, the picture of each location of pixels of the corresponding building reference frame of image has been decoded to the former frame
Plain value is handled, and the corresponding building reference frame of current image to be decoded is generated.
7. according to the method described in claim 6, it is characterized in that, before the step a, the method also includes:
Judge whether the place predicting unit of the current pixel position for currently having decoded image uses skip mode to decode；
When the judging result, which is, is, then step c is jumped to；Otherwise, step a is jumped to.
8. method according to claim 6 or 7, which is characterized in that it is corresponding that the update former frame has decoded image
Building reference frame current pixel position the step of include:
It is corresponding that the pixel value of the current pixel position for currently having decoded image with the former frame image has been decoded into
Building reference frame in be weighted with the pixel value of the current pixel position corresponding position, generate calculated result；
Using the calculated result, the current pixel position that the former frame has decoded the corresponding building reference frame of image is updated
Set the pixel value of corresponding position.
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