CA2473771A1 - Moving picture encoding/decoding method and device using multiple reference frames for motion prediction - Google Patents
Moving picture encoding/decoding method and device using multiple reference frames for motion prediction Download PDFInfo
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- CA2473771A1 CA2473771A1 CA 2473771 CA2473771A CA2473771A1 CA 2473771 A1 CA2473771 A1 CA 2473771A1 CA 2473771 CA2473771 CA 2473771 CA 2473771 A CA2473771 A CA 2473771A CA 2473771 A1 CA2473771 A1 CA 2473771A1
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- 230000001447 compensatory effect Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
Classifications
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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
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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
- H04N19/103—Selection of coding mode or of prediction mode
- H04N19/105—Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
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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
- H04N19/103—Selection of coding mode or of prediction mode
- H04N19/107—Selection of coding mode or of prediction mode between spatial and temporal predictive coding, e.g. picture refresh
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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
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
-
- 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
- H04N19/46—Embedding additional information in the video signal during the compression process
-
- 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
- H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
- H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
Abstract
A moving picture encoding device includes: a frame memory/prediction image generator (108) having a first prediction mode for selecting one combination from a plurality of combinations of a reference image number and a prediction parameter and generating a prediction image signal (212) and a second prediction mode for generating the prediction image signal according to a prediction parameter calculated according to the reference image number and the inter-image distance of a plurality of reference images; and a variable length encoder (111) for selecting one of the first and the second prediction mode according the number of reference images and encoding orthogonal conversion coefficient information (210) associated with the prediction error signal of the prediction image signal (212) for the input moving picture signal (100), mode information (213) indicating the encoding mode, motion vector information (214), and index information (215) indicating the combination of the selected reference image number and the prediction parameter.
Claims (18)
1. In a video encoding method of subjecting an input video signal to a motion compensated predictive encoding using at least one reference image signal and a motion vector between the input video signal and the reference image signal, the method comprising:
a step of generating a predictive image signal according to a reference image number and a predictive parameter of one combination selected from a plurality of combinations of at least one reference image number and a predictive parameter, which are prepared for beforehand, every to-be-encoded region of the input video signal, when a single reference image is used in the motion compensated predictive encoding;
a step of generating a predictive image signal according to reference image numbers of a plurality of reference images and predictive parameters computed based on an image-to-image distance of the plurality of reference images every to-be-encoded region, when a plurality of reference images are used in the motion compensated predictive encoding;
a step of generating a predictive error signal representing an error of the predictive image signal with respect to the input video signal; and a step of encoding the predictive error signal, the motion vector information and index information indicating one of the selected combination and the reference image numbers of the plurality of reference images.
a step of generating a predictive image signal according to a reference image number and a predictive parameter of one combination selected from a plurality of combinations of at least one reference image number and a predictive parameter, which are prepared for beforehand, every to-be-encoded region of the input video signal, when a single reference image is used in the motion compensated predictive encoding;
a step of generating a predictive image signal according to reference image numbers of a plurality of reference images and predictive parameters computed based on an image-to-image distance of the plurality of reference images every to-be-encoded region, when a plurality of reference images are used in the motion compensated predictive encoding;
a step of generating a predictive error signal representing an error of the predictive image signal with respect to the input video signal; and a step of encoding the predictive error signal, the motion vector information and index information indicating one of the selected combination and the reference image numbers of the plurality of reference images.
2. The video encoding method according to claim 1, wherein the step of generating the predictive image signal by means of the plurality of reference images including encoding the to-be-encoded region by a bidirectional prediction.
3. The video encoding method according to claim 1 or 2, wherein the predictive image signal generating step includes generating the predictive image by weighting the plurality of reference images using a weighting factor obtained from the image-to-image distance.
4. The video encoding method according to claim 3, wherein the predictive image signal generating step includes generating the predictive image by weighting the plurality of reference images using a weighting factor including a parameter to limit a maximum value and a minimum value of the image-to-image distance.
5. The video encoding method according to claim 1 or 2, wherein the predictive parameter includes a weighting factor and an offset which are obtained by the image-to-image distance, and the step of generating the predictive image signal includes computing a linear sum for the a reference image signal designated by the reference image number according to the weighted factor and then adding the offset thereto.
6. The video encoding method according to claim 1 or 2, wherein the weighting factor has a denominator of two exponentiation.
7. The video encoding method according to claim 1 or 2, wherein the input video signal comprises a luminance signal and two color-difference signals, and the predictive parameter is prepared every luminance signal and every two color-difference signals.
8. A video decoding method comprising:
a step of decoding encoded data including a predictive error signal representing an error of the predictive image signal with respect to the video signal, motion vector information and index information indicating either of combination of a reference image number with a predictive parameter and reference image numbers of a plurality of reference images;
a step of generating a predictive image signal according to the reference image number and predictive parameter of the combination, when the decoded index information indicates the combination;
a step of generating the predictive image signal according to the reference image number and the predictive parameter computed based on a distance between the plurality of reference images, when the index information which can leave decoding shows a reference image number of the a plurality of reference image; and a step of generating a playback video signal using the predictive image signal.
a step of decoding encoded data including a predictive error signal representing an error of the predictive image signal with respect to the video signal, motion vector information and index information indicating either of combination of a reference image number with a predictive parameter and reference image numbers of a plurality of reference images;
a step of generating a predictive image signal according to the reference image number and predictive parameter of the combination, when the decoded index information indicates the combination;
a step of generating the predictive image signal according to the reference image number and the predictive parameter computed based on a distance between the plurality of reference images, when the index information which can leave decoding shows a reference image number of the a plurality of reference image; and a step of generating a playback video signal using the predictive image signal.
9. The video decoding method according to claim 8, wherein the predictive parameter includes a weighting factor and an offset, and the step of generating the predictive image signal includes subjecting a reference image signal designated by the reference image number to a linear sum according to the weighted factor included in the index information and then adding the offset included in the index information thereto.
10. In a video encoding apparatus to subject an input video signal to a motion compensated predictive encoding using at least one reference image signal and a motion vector between the input video signal and the reference image signal, the apparatus comprising:
a table to stores at least one reference image number and a predictive parameter;
first predictive signal generating means for generating a predictive image signal according to the reference image number and predictive parameter of one combination selected from a plurality of combinations of the reference image number and the predictive parameter every to-be-encoded region of the input video signal;
second predictive image signal generating means for generating a predictive image signal according to a predictive parameter computed based on reference image numbers of the plurality of reference images and distance between the plurality of reference images every to-be-encoded region;
means for selecting the first predictive image signal generating means when one of the reference images is used in the motion compensative prediction encoding, and selecting the second predictive image signal generating means when a plurality of reference images are used;
means for generating a predictive error signal representing an error of the predictive image signal with respect to the input video signal; and means for encoding the predictive error signal, the motion vector information, and index information indicating either of the selected combination and the reference image numbers of the plurality of reference images.
a table to stores at least one reference image number and a predictive parameter;
first predictive signal generating means for generating a predictive image signal according to the reference image number and predictive parameter of one combination selected from a plurality of combinations of the reference image number and the predictive parameter every to-be-encoded region of the input video signal;
second predictive image signal generating means for generating a predictive image signal according to a predictive parameter computed based on reference image numbers of the plurality of reference images and distance between the plurality of reference images every to-be-encoded region;
means for selecting the first predictive image signal generating means when one of the reference images is used in the motion compensative prediction encoding, and selecting the second predictive image signal generating means when a plurality of reference images are used;
means for generating a predictive error signal representing an error of the predictive image signal with respect to the input video signal; and means for encoding the predictive error signal, the motion vector information, and index information indicating either of the selected combination and the reference image numbers of the plurality of reference images.
11. The video encoding apparatus according to claim 10, wherein the selecting means selects the second predictive image signal generating means when the to-be-encoded region is encoded by a bidirectional prediction and a plurality of reference images are used in the motion compensated prediction encoding.
12. The video encoding apparatus according to claim 10 or 11, wherein the predictive image signal generating means generates the predictive image by weighting the plurality of reference images using the weighted factor obtained from the image-to-image distance.
13. The video encoding apparatus according to claim 12, wherein the predictive image signal generating means generates the predictive image by weighting the plurality of reference images with limiting a maximum value and a minimum value of the weighting factor obtained from the image-to-image distance.
14. The video encoding apparatus according to claim 13, wherein the predictive image signal generating means generates an average of the plurality of reference images as the predictive image when exceeds a maximum and a minimum of a weighting factor obtained from the image-to-image distance.
15. The video encoding apparatus according to claim 10 or 11, wherein the predictive parameter includes information of a weighting factor and offset, and the predictive image signal generating means includes means for computing a linear sum for the reference image signal designated by the reference image number according to the weighting factor and then adding the offset thereto.
16. The video encoding apparatus according to claim 10 or 11, wherein the weighting factor has a denominator of two exponentiation.
17. The video encoding apparatus according to claim 10 or 11, wherein the input video signal comprises a luminance signal and two color-difference signals, and the predictive parameter is prepared every luminance signal and two color-difference signals.
18. A video decoding apparatus comprises:
means for decoding encoded data including a predictive error signal representing an error of predictive image signal with respect to a video signal, motion vector information, and index information indicating either of combination of a reference image number with a predictive parameter and reference image numbers of a plurality of reference images;
means for generating the predictive image signal according to the reference image number and predictive parameter of the combination, when the decoded index information indicates the combination;
means for generating the predictive image signal according to the reference image number and a predictive parameter computed based on an image-to-image distance of the plurality of reference images, when the decoded index information indicates the reference image numbers of the plurality of reference images; and means for generating a playback video signal using the predictive error signal and the predictive image signal.
means for decoding encoded data including a predictive error signal representing an error of predictive image signal with respect to a video signal, motion vector information, and index information indicating either of combination of a reference image number with a predictive parameter and reference image numbers of a plurality of reference images;
means for generating the predictive image signal according to the reference image number and predictive parameter of the combination, when the decoded index information indicates the combination;
means for generating the predictive image signal according to the reference image number and a predictive parameter computed based on an image-to-image distance of the plurality of reference images, when the decoded index information indicates the reference image numbers of the plurality of reference images; and means for generating a playback video signal using the predictive error signal and the predictive image signal.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| JP2002-339931 | 2002-11-22 | ||
| JP2002339931A JP2004179687A (en) | 2002-11-22 | 2002-11-22 | Motion picture coding/decoding method and apparatus thereof |
| PCT/JP2003/014658 WO2004049728A1 (en) | 2002-11-22 | 2003-11-18 | Moving picture encoding/decoding method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2473771A1 true CA2473771A1 (en) | 2004-06-10 |
| CA2473771C CA2473771C (en) | 2010-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CA2473771A Expired - Lifetime CA2473771C (en) | 2002-11-22 | 2003-11-18 | Moving picture encoding/decoding method and device using multiple reference frames for motion prediction |
Country Status (12)
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| US (8) | US7616691B2 (en) |
| EP (2) | EP1565001A4 (en) |
| JP (1) | JP2004179687A (en) |
| KR (2) | KR100671452B1 (en) |
| CN (3) | CN101090493B (en) |
| AU (1) | AU2003280847B2 (en) |
| BR (1) | BRPI0307635A8 (en) |
| CA (1) | CA2473771C (en) |
| MX (1) | MXPA04008392A (en) |
| NO (2) | NO341761B1 (en) |
| SG (1) | SG106261A1 (en) |
| WO (1) | WO2004049728A1 (en) |
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- 2002-11-22 JP JP2002339931A patent/JP2004179687A/en active Pending
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2003
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