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| Presentation | 2014-12-20 15:45 Relationship of Subjective Quality between Quantization Parameter and Viewing Distance on Image Coding Ayumu Ohike, Naoyuki Awano, Kenji Sugiyama (Seikei Univ.)  IMQ2014-21 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Very high-resolution video systems, such as 4K, enable a very close viewing distance. This technology enables high-reality systems in homes to be realized. However, the very short distance causes significantly different views across the picture, and uniform processing for the picture may not always be the best choice. Here, we calculate the actual view size of a pixel, which depends on the pixel position in close viewing. We have proposed the two kinds of perceptual coding methods. First one is a pre-filtering which depend on the size of a pixel. Another one is a quantization control by a contrast change. However, the control of quantization should be decided based on the perceptual performance between pixel size and quantization. Therefore, we carried out subjective assessment about this. The bit rate reduction is checked for each methods. As the results of this experiments, it is recognized that up to 15% of bit rate reduction is achievable. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | High Reality Video System / Super Close Viewing / Quantization Control / Subjective Quality Assessment / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 114, no. 386, IMQ2014-21, pp. 29-32, Dec. 2014. | |
| Paper # | IMQ2014-21 | |
| Date of Issue | 2014-12-13 (IMQ) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | IMQ2014-21 |
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| Conference Information | |
| Committee | IMQ |
| Conference Date | 2014-12-20 - 2014-12-20 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Nagoya University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Medical Imaging and Image Media Quality |
| Paper Information | |
| Registration To | IMQ |
| Conference Code | 2014-12-IMQ |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Relationship of Subjective Quality between Quantization Parameter and Viewing Distance on Image Coding |
| Sub Title (in English) | |
| Keyword(1) | High Reality Video System |
| Keyword(2) | Super Close Viewing |
| Keyword(3) | Quantization Control |
| Keyword(4) | Subjective Quality Assessment |
| Keyword(5) | |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Ayumu Ohike |
| 1st Author's Affiliation | Seikei University (Seikei Univ.) |
| 2nd Author's Name | Naoyuki Awano |
| 2nd Author's Affiliation | Seikei University (Seikei Univ.) |
| 3rd Author's Name | Kenji Sugiyama |
| 3rd Author's Affiliation | Seikei University (Seikei Univ.) |
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| Speaker | Author-1 |
| Date Time | 2014-12-20 15:45:00 |
| Presentation Time | 25 minutes |
| Registration for | IMQ |
| Paper # | IMQ2014-21 |
| Volume (vol) | vol.114 |
| Number (no) | no.386 |
| Page | pp.29-32 |
| #Pages | 4 |
| Date of Issue | 2014-12-13 (IMQ) |
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