| Presentation | 2002/7/16 A Transmission Rate Adaptation System by Discarding the DCT Coefficient Considering the Picture Type Yoshihide TONOMURA, Yuzo SENDA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Recently, an internet broadcasting of visual signals and audio signals in best-effort type communication is attracting great deal of attention. One of the problems of this communication type is a deficiency of receiving data in decoding images and sounds because of transmission rate is not constant. As a result, decoded image is not smooth. To solve this problem, various methods have been proposed. One of those methods is a transmission bit rate control system, which drops high frequency components of the original data. In this report, we extend this system using a different type of picture: Interlace and Progressive picture, and optimize a dropping ratio of DCT coefficients for both picture types. In the case of Progressive picture, image quality is improved when a dropping ratio of Bidirectionally Predictive picture (B picture) increased by 2 or 3 oblique columns of DCT matrix than that of Intra and Predictive picture (I,P picture). Similarly, in the case of Interlace picture, dropping ratio of B picture is optimized by increasing the number of coefficients of the first row of DCT matrix by 3 or 4 than that of I,P picture. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | MPEG / scaling / DCT / QoS / bitrate control |
| Paper # | DSP2002-101 |
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| Conference Information | |
| Committee | DSP |
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| Conference Date | 2002/7/16(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Digital Signal Processing (DSP) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Transmission Rate Adaptation System by Discarding the DCT Coefficient Considering the Picture Type |
| Sub Title (in English) | |
| Keyword(1) | MPEG |
| Keyword(2) | scaling |
| Keyword(3) | DCT |
| Keyword(4) | QoS |
| Keyword(5) | bitrate control |
| 1st Author's Name | Yoshihide TONOMURA |
| 1st Author's Affiliation | Graduate school of Engineering, Nagaoka University() |
| 2nd Author's Name | Yuzo SENDA |
| 2nd Author's Affiliation | NEC Corporation |
| Date | 2002/7/16 |
| Paper # | DSP2002-101 |
| Volume (vol) | vol.102 |
| Number (no) | 226 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |