CA2578871A1 - Process for coding or decoding motion vectors and coding or decoding device implementing the said process - Google Patents
Process for coding or decoding motion vectors and coding or decoding device implementing the said process Download PDFInfo
- Publication number
- CA2578871A1 CA2578871A1 CA 2578871 CA2578871A CA2578871A1 CA 2578871 A1 CA2578871 A1 CA 2578871A1 CA 2578871 CA2578871 CA 2578871 CA 2578871 A CA2578871 A CA 2578871A CA 2578871 A1 CA2578871 A1 CA 2578871A1
- Authority
- CA
- Canada
- Prior art keywords
- vector
- coded
- components
- block
- coding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000013598 vector Substances 0.000 title claims abstract 45
- 238000000034 method Methods 0.000 title claims abstract 7
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
Landscapes
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
The invention relates to a process for the differential coding of a motion vector (MV0) associated with a macro-block (M0). This process comprises the steps:
determining the components (MV0x, MV0y) of the said motion vector (MV0), determining a prediction vector, each component (Px, Py) of which is equal to the median value of the corresponding components of at least three candidate motion vectors (MV1, MV2, MV3), a candidate motion vector being a vector associated with a previously coded macro-block, subtracting the components thus obtained from the components of the vector to be coded. The invention also relates to a process for decoding motion vectors coded in the manner described above, as well as to the implementation devices. The invention applies to the field of image compression.
determining the components (MV0x, MV0y) of the said motion vector (MV0), determining a prediction vector, each component (Px, Py) of which is equal to the median value of the corresponding components of at least three candidate motion vectors (MV1, MV2, MV3), a candidate motion vector being a vector associated with a previously coded macro-block, subtracting the components thus obtained from the components of the vector to be coded. The invention also relates to a process for decoding motion vectors coded in the manner described above, as well as to the implementation devices. The invention applies to the field of image compression.
Claims (4)
1. Process for the differential coding of a motion vector (MV0) associated with a block (M0), the motion vector being used for implementing an inter coding mode for the coding of an image, another coding mode being the intra coding, characterized in that it comprises the steps:
- of determining the components (MV0x, MV0y) of the said motion vector (MV0), - of determining if a block among the blocks lying to the left or immediately above or lying above and to the right of the block of which a vector is to be coded, is coded in intra mode, - of determining, if it is the case, a prediction vector, each component (Px, Py) of which is equal to the median value of a zero value and of the corresponding components of two candidate motion vectors (MV1, MV2, MV3), said candidate motion vectors being the vectors associated with previously inter coded blocks lying to the left or immediately above or lying above and to the right of the block of which a vector is to be coded, - of subtracting the components thus obtained from the components of the vector to be coded.
- of determining the components (MV0x, MV0y) of the said motion vector (MV0), - of determining if a block among the blocks lying to the left or immediately above or lying above and to the right of the block of which a vector is to be coded, is coded in intra mode, - of determining, if it is the case, a prediction vector, each component (Px, Py) of which is equal to the median value of a zero value and of the corresponding components of two candidate motion vectors (MV1, MV2, MV3), said candidate motion vectors being the vectors associated with previously inter coded blocks lying to the left or immediately above or lying above and to the right of the block of which a vector is to be coded, - of subtracting the components thus obtained from the components of the vector to be coded.
2. Process for the decoding of a motion vector (MV0) coded by differential coding, characterized in that it comprises the steps:
- of extracting, from the data received, the differences in components (MVDx, MVDy) corresponding to this vector (MV0), - of determining if a block among the blocks lying to the left or immediately above or lying above and to the right of the block of which a vector is to be decoded, is coded in intra mode, - of determining, if it is the case, a prediction vector, each component (Px, Py) of which is equal to the median value of the corresponding components of a zero vector and of vectors associated with the two previously decoded blocks (MV1, MV2, MV3) which were coded in inter mode and lying to the left or immediately above or lying above and to the right of the block of which a vector is to be decoded, - of adding the said differences in components (MVDx, MVDy) to the components (Px, Py) of the prediction vector.
- of extracting, from the data received, the differences in components (MVDx, MVDy) corresponding to this vector (MV0), - of determining if a block among the blocks lying to the left or immediately above or lying above and to the right of the block of which a vector is to be decoded, is coded in intra mode, - of determining, if it is the case, a prediction vector, each component (Px, Py) of which is equal to the median value of the corresponding components of a zero vector and of vectors associated with the two previously decoded blocks (MV1, MV2, MV3) which were coded in inter mode and lying to the left or immediately above or lying above and to the right of the block of which a vector is to be decoded, - of adding the said differences in components (MVDx, MVDy) to the components (Px, Py) of the prediction vector.
3. Device for the differential coding of a motion vector (MV0) associated with a block (M0), the motion vector being used for implementing an inter coding mode for the coding of an image, another coding mode being the intra coding, characterized in that it comprises:
- means for determining the components (MV0x, MV0y) of the said motion vector (MV0), - means for determining if a block among the blocks lying to the left or immediately above or lying above and to the right of the block of which a vector is to be coded, is coded in intra mode, - means for determining, if it is the case, a prediction vector, each component (Px, Py) of which is equal to the median value of a zero value and of the corresponding components of two candidate motion vectors (MV1, MV2, MV3), said candidate motion vectors being the vectors associated with previously inter coded blocks lying to the left or immediately above or lying above and to the right of the block of which a vector is to be coded, - means for subtracting the components thus obtained from the components of the vector to be coded.
- means for determining the components (MV0x, MV0y) of the said motion vector (MV0), - means for determining if a block among the blocks lying to the left or immediately above or lying above and to the right of the block of which a vector is to be coded, is coded in intra mode, - means for determining, if it is the case, a prediction vector, each component (Px, Py) of which is equal to the median value of a zero value and of the corresponding components of two candidate motion vectors (MV1, MV2, MV3), said candidate motion vectors being the vectors associated with previously inter coded blocks lying to the left or immediately above or lying above and to the right of the block of which a vector is to be coded, - means for subtracting the components thus obtained from the components of the vector to be coded.
4. Device for the decoding of a motion vector (MV0) coded by differential coding, characterized in that it comprises:
- means for extracting, from the data received, the differences in components (MVDx, MVDy) corresponding to this vector (MV0), - means for determining if a block among the blocks lying to the left or immediately above or lying above and to the right of the block of which a vector is to be decoded, is coded in intra mode, - means for determining, if it is the case, a prediction vector, each component (Px, Py) of which is equal to the median value of the corresponding components of a zero vector and of vectors associated with the two previously decoded blocks (MV1, MV2, MV3) which were coded in inter mode and lying to the left or immediately above or lying above and to the right of the block of which a vector is to be decoded, - means for adding the said differences in components (MVDx, MVDy) to the components (Px, Py) of the prediction vector.
- means for extracting, from the data received, the differences in components (MVDx, MVDy) corresponding to this vector (MV0), - means for determining if a block among the blocks lying to the left or immediately above or lying above and to the right of the block of which a vector is to be decoded, is coded in intra mode, - means for determining, if it is the case, a prediction vector, each component (Px, Py) of which is equal to the median value of the corresponding components of a zero vector and of vectors associated with the two previously decoded blocks (MV1, MV2, MV3) which were coded in inter mode and lying to the left or immediately above or lying above and to the right of the block of which a vector is to be decoded, - means for adding the said differences in components (MVDx, MVDy) to the components (Px, Py) of the prediction vector.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9412083A FR2725577B1 (en) | 1994-10-10 | 1994-10-10 | CODING OR DECODING METHOD OF MOTION VECTORS AND CODING OR DECODING DEVICE USING THE SAME |
| FR9412083 | 1994-10-10 | ||
| CA002160087A CA2160087C (en) | 1994-10-10 | 1995-10-06 | Process for coding or decoding motion vectors and coding or decoding device implementing the said process |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002160087A Division CA2160087C (en) | 1994-10-10 | 1995-10-06 | Process for coding or decoding motion vectors and coding or decoding device implementing the said process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2578871A1 true CA2578871A1 (en) | 1996-04-11 |
| CA2578871C CA2578871C (en) | 2010-11-30 |
Family
ID=38162431
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2578872 Expired - Lifetime CA2578872C (en) | 1994-10-10 | 1995-10-06 | Process for coding or decoding motion vectors and coding or decoding device implementing the said process |
| CA 2578871 Expired - Lifetime CA2578871C (en) | 1994-10-10 | 1995-10-06 | Process for coding or decoding motion vectors and coding or decoding device implementing the said process |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2578872 Expired - Lifetime CA2578872C (en) | 1994-10-10 | 1995-10-06 | Process for coding or decoding motion vectors and coding or decoding device implementing the said process |
Country Status (1)
| Country | Link |
|---|---|
| CA (2) | CA2578872C (en) |
-
1995
- 1995-10-06 CA CA 2578872 patent/CA2578872C/en not_active Expired - Lifetime
- 1995-10-06 CA CA 2578871 patent/CA2578871C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2578872A1 (en) | 1996-04-11 |
| CA2578871C (en) | 2010-11-30 |
| CA2578872C (en) | 2010-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2160087A1 (en) | Process for coding or decoding motion vectors and coding or decoding device implementing the said process | |
| KR100249223B1 (en) | Method for motion vector coding of mpeg-4 | |
| WO1999026417A3 (en) | Motion-compensated predictive image encoding and decoding | |
| US6825885B2 (en) | Motion information coding and decoding method | |
| MY138540A (en) | Motion compensation method, picture coding method and picture decoding method | |
| CA2130779A1 (en) | Method and Apparatus for Improving Motion Compensation in Digital Video Coding | |
| US20060133475A1 (en) | Video coding | |
| KR19980081235A (en) | A picture prediction decoding method, a picture prediction decoding device, a picture prediction coding method, a picture prediction coding device and a data storage medium | |
| CN108696754A (en) | The method and apparatus of motion vector prediction | |
| KR19990066826A (en) | Motion vector prediction method | |
| CA2578871A1 (en) | Process for coding or decoding motion vectors and coding or decoding device implementing the said process | |
| JP2006518564A (en) | Predictive coding of motion vectors with flags indicating the presence or absence of encoded residual motion vector data | |
| Tok et al. | Motion modeling for motion vector coding in HEVC | |
| KR100379846B1 (en) | Motion vector detector | |
| CN1771736A (en) | Video encoding and decoding methods and corresponding devices | |
| KR940006409A (en) | Moving vector detection method included in image information | |
| KR0181067B1 (en) | Moving picture encoder of having compatibility | |
| JPH02131697A (en) | High efficiency stereo moving picture encoding system | |
| KR100293445B1 (en) | Method for coding motion vector | |
| JPH04181888A (en) | Moving picture data compressor | |
| KR20070063479A (en) | Method for compressing moving picture using 1/4 pixel motion vector | |
| Kim et al. | A New Motion Vector Coding Technique Using Minimum Bitrate Prediction | |
| KR100393987B1 (en) | Method of video coding and decoding for video codec | |
| KR970064258A (en) | Moving Object Coder | |
| KR20060081687A (en) | Method for compressing moving picture using 1/4 pixel motion vector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20151006 |