Title:
DOWN-SAMPLING METHOD, UP-SAMPLING METHOD, AND TRANSMISSION PROCESSING METHOD OF VIDEO FRAMES
Document Type and Number:
WIPO Patent Application WO/2017/045344
Kind Code:
A1
Abstract:
Disclosed are a down-sampling method, up-sampling method, and transmission processing method of video frames. By utilizing two properties that most energy of video frames subjected to discrete cosine transform is concentrated in low-frequency coefficients and space domains corresponding to high-frequency coefficients are sparse, the video frames are subjected to the discrete cosine transform, and then are down-sampled to cut out the low-frequency coefficients, and the space domains corresponding to the high-frequency coefficients are down-sampled by using a compression sensing theory. At an up-sampling end, the low-frequency coefficients obtained by the down-sampling are expanded to the same size as original video frames by means of high-frequency coefficient zero-padding, and then are returned to the space domains by means of inverse discrete cosine transform; meanwhile, the space domains corresponding to the high-frequency coefficients are recovered by using a compression sensing reconstruction algorithm. Finally, reconstructed video frames consistent with the original video frames in height are obtained by adding up space domain components obtained by low-frequency coefficient zero-padding and space domain components obtained by using the high-frequency compression sensing reconstruction algorithm. Compared with the conventional solution, in the case of a same down-sampling ratio, the video frames obtained by up-sampling in the method of the present invention have higher similarity to the original video frames.
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Inventors:
ZHANG MENG (CN)
CHEN TINGHUAN (CN)
SUN ZHIFEI (CN)
CHEN TINGHUAN (CN)
SUN ZHIFEI (CN)
Application Number:
PCT/CN2016/073415
Publication Date:
March 23, 2017
Filing Date:
February 04, 2016
Export Citation:
Assignee:
UNIV SOUTHEAST (CN)
International Classes:
H04N19/59; H04N19/625
Domestic Patent References:
| WO2014173970A1 | 2014-10-30 |
Foreign References:
| CN103098464A | 2013-05-08 | |||
| CN102378011A | 2012-03-14 | |||
| CN105263027A | 2016-01-20 | |||
| CN104469389A | 2015-03-25 |
Attorney, Agent or Firm:
JIANGSU AIXIN LAW FIRM (CN)
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