Patent US6574279B1 successfully refreshed from Google Patents.
US6574279B1
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Video transcoding using syntactic and semantic clues
Assignee: Mitsubishi Electric Research Laboratories Inc
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Filing: 2000-04-11
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Granted: 2003-06-03
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Expires: 2020-04-11
Abstract
Abstract A method for transcoding a compressed video partitions the compressed video into hierarchical levels, and extracts features from each of the hierarchical levels. One of a number of conversion modes of a transcoder is selected dependent on the features extracted from the hierarchical levels. The compressed video is then transcoded according to the selected conversion mode.
Inventors
- 👤 Anthony Vetro
- 👤 Ajay Divakaran
- 👤 Huifang Sun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:19
CPC Classifications
G; G06; G06T; G06T9/00; G06T9/001; H; H04; H04L; H04L47/00; H04L47/10; H04L65/00; H04L65/1066; H04L65/1101; H04L65/60; H04L65/75; H04L65/752; H04L65/765; H04L65/80; H04L69/00; H04L69/04; H04N; H04N19/00; H04N19/10; H04N19/102; H04N19/124; H04N19/134; H04N19/146; H04N19/147; H04N19/152; H04N19/169; H04N19/17; H04N19/172; H04N19/189; H04N19/19; H04N19/20; H04N19/25; H04N19/29; H04N19/30; H04N19/33; H04N19/40; H04N19/42; H04N19/436; H04N19/60; H04N19/61; H04N21/00; H04N21/20; H04N21/23; H04N21/234; H04N21/23418; H04N21/2343; H04N21/234318; H04N21/25; H04N21/266; H04N21/2662; H04N21/80; H04N21/83; H04N21/84; H04N21/85; H04N21/854; H04N21/8549; H04N21/23439
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
66 words
A method for transcoding a compressed video, comprising the steps of: partitioning the compressed video into a plurality of hierarchical levels; extracting features from each of the plurality of hierarchical levels; selecting one of a plurality of conversion modes of a transcoder dependent on the features extracted from each of the plurality of hierarchical levels; and transcoding the compressed video according to the selected conversion mode.
Claim 2
Independent Claim
66 words
A method for transcoding a compressed video, comprising the steps of: partitioning the compressed video into a plurality of hierarchical levels; extracting features from each of the plurality of hierarchical levels; selecting one of a plurality of conversion modes of a transcoder dependent on the features extracted from each of the plurality of hierarchical levels; and transcoding the compressed video according to the selected conversion mode.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein the plurality of hierarchical levels include a program level, a shot level, a frame level, and sub-region level.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein the frame level includes video object planes.
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein the features depend on semantics and syntactics of the compressed video.
Claim 6
Dependent Claim
31 words
The method of claim 1 wherein the compressed video includes low-level meta-data, and further comprising the step of: mapping the low-level meta-data to rate-quality characteristics depending on content of the video.
Claim 7
Dependent Claim
16 words
The method of claim 5 wherein the rate-quality characteristics are partitioned into a plurality of classes.
Claim 8
Dependent Claim
40 words
The method of claim 6 including a first class where spatial quality is less than temporal quality, a second class where spatial quality is greater than temporal quality, and a third class where spatial quality is equal to temporal quality.
Claim 9
Dependent Claim
52 words
The method of claim 7 wherein content of the first class is transcoded with a discrete-summary transcoder, content of the second class is transcoded with a continuous-conversion transcoder at a relatively low frame rate, and content of the third class is transcoded with the continuous-conversion transcoder at a relatively high frame rate.
Claim 10
Dependent Claim
31 words
The method of claim 8 wherein the relatively low frame rate is less than ten frames per second, and the relatively high frame rate is greater than twenty frames per second.
Claim 11
Dependent Claim
35 words
The method of claim 6 including a first class where content is easy to compress, a second class where content is moderately difficult to compress, and a third class where content is difficult to compress.
Claim 12
Dependent Claim
58 words
The method of claim 10 wherein content of the first class is transcoded with a continuous-conversion transcoder at a relatively high frame rate, content of the second class is transcoded with a continuous-conversion transcoder at a moderate frame rate, and content of the third class is transcoded with the continuous-conversion transcoder at a relatively low high frame rate.
Claim 13
Dependent Claim
41 words
The method of claim 11 where the relatively high frame is greater than twenty frames per second, the moderate frame rate is between twenty and ten frames per second, the relatively low fame rate is less than ten frames per second.
Claim 14
Dependent Claim
19 words
The method of claim 5 wherein the low-level meta-data is based on a priority of content of the video.
Claim 15
Dependent Claim
20 words
The method of claim 5 wherein the low-level meta-data is based on a shape parameters of content of the video.
Claim 16
Dependent Claim
19 words
The method of claim 5 wherein the low-level meta-data is based on a texture of content of the video.
Claim 17
Dependent Claim
19 words
The method of claim 5 wherein the low-level meta-data is based on motion activity of content of the video.
Claim 18
Dependent Claim
20 words
The method of claim 5 wherein the low-level meta-data is based on a DCT coefficients of content of the video.
Claim 19
Dependent Claim
13 words
The method of claim 5 wherein high-level meta-data are encoded from low-level meta-data.
Claim 20
Dependent Claim
16 words
The method of claim 6 wherein the plurality of classes are ranked on a numeric scale.
Claim 21
Dependent Claim
13 words
The method of claim 1 wherein the transcoding produces a CBR bit stream.
Claim 22
Dependent Claim
13 words
The method of claim 1 wherein the transcoding produces a VBR bit stream.
Claim 23
Dependent Claim
31 words
The method of claim 1 further comprising steps of: generating a descriptor scheme from the low-level meta-data; and generating a variation of the compressed input bitstream according to the descriptor scheme.
Claim 24
Dependent Claim
21 words
The method of claim 1 wherein the transcoding is based on features extracted from a selected one of the hierarchical levels.
Claim 25
Dependent Claim
11 words
The method claim 23 wherein the features depend on spatial importance.
Claim 26
Dependent Claim
11 words
The method claim 23 wherein the features depend on temporal importance.
Claim 27
Dependent Claim
11 words
The method claim 23 wherein the features depend on compression difficulty.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-06-02 | 2006-12-02 | 2007-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-06-02 | 2010-12-02 | 2011-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-06-02 | 2014-12-02 | 2015-06-03 | $7700.00 | Window Closed / Lapsed |