| Presentation | 2010-06-10 Acoustic OFDM System Applying Sub-Carrier Power Control and DCT Yoshinobu KAJIKAWA, Tsuyoshi KOBAYASHI, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, we propose a novel method to embed information data on DCT (Discrete Cosine Transform) domain and control transmission power of each sub-carrier using frequency masking for acoustic OFDM (Orthogonal Frequency Division Multiplex) in order to improve the sound quality and the transmission characteristic. In the acoustic OFDM, information data is placed on the phase of each sub-carrier, so that the sound quality deteriorates as the transmission quantity increases. Moreover, sub-carriers with low electric power deteriorate the whole transmission characteristic due to additive noise because the frequency spectrum of audio signal is not flat. We therefore propose an embedding method using DCT for the deterioration of the transmission characteristic and a power control method using frequency masking for the deterioration of the sound quality. Moreover, we demonstrate that the combination of the proposed methods can simultaneously realize an increased transmission rate and an improved sound quality through some simulation results and subjective tests. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | acoustic communication / OFDM / DCT / frequency masking / power control |
| Paper # | SIS2010-5 |
| Date of Issue |
| Conference Information | |
| Committee | SIS |
|---|---|
| Conference Date | 2010/6/3(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Smart Info-Media Systems (SIS) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Acoustic OFDM System Applying Sub-Carrier Power Control and DCT |
| Sub Title (in English) | |
| Keyword(1) | acoustic communication |
| Keyword(2) | OFDM |
| Keyword(3) | DCT |
| Keyword(4) | frequency masking |
| Keyword(5) | power control |
| 1st Author's Name | Yoshinobu KAJIKAWA |
| 1st Author's Affiliation | Faculty of Engineering Science, Kansai University() |
| 2nd Author's Name | Tsuyoshi KOBAYASHI |
| 2nd Author's Affiliation | Faculty of Engineering Science, Kansai University |
| Date | 2010-06-10 |
| Paper # | SIS2010-5 |
| Volume (vol) | vol.110 |
| Number (no) | 74 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |