| Authors |
M. Honjo, S. Makido, T. Yamazato, H. Okada, M. Katayama, A. Ogawa |
| Title |
Hierarchical Transmission of Video Signal Using Multi-Code DS/SS Modulation Based on DCT Coefficients |
| Authority |
IEEE Global Communications Conference (GLOBECOM), vol.6, pp.3395-3399 |
| Summary |
In this paper, we propose a hierarchical transmission of video signal
using multi-code DS/SS modulation. Assigning an appropriate
distribution of transmission energy to DCT
coefficients, it is possible to control the picture quality depending on
the channel quality.
We consider a hierarchical structure based on the variance of DCT
coefficient and transmit each coefficient using multi-code DS/SS modulation.
The analysis is carried out to show the effectiveness of our scheme using 2-D
Gauss-Markov random field, which represents image data. It is shown that by
an appropriate energy assignment to each stratum (a branch of multi-code
DS/SS), it is possible to maintain picture quality even in bad channel
quality.
|
| 年月 |
2001年11月 |
| DOI/Handle |
|
| 開催場所 |
San Antonio, USA |
| 研究テーマ |
|
| 言語 |
英語 |
| 原稿/プレゼン資料 |
 / 無し (ローカル限定) |
