講演抄録/キーワード |
講演名 |
2015-09-11 09:55
Analysis of Watermarking into CELP Speech Codec Based on Formant Tuning ○Erick Christian Garcia Alvarez・Shengbei Wang・Masashi Unoki(JAIST) LOIS2015-22 IE2015-54 EMM2015-37 |
抄録 |
(和) |
Unifying the code-excited linear prediction (CELP) codec process with the watermarking based on formant tuning method provides inaudibility and robustness. The serial problem of watermarking and then encoding by CELP codec is thereby reduced by the proposed method which also increased the bit detection rate. We took advantage of each key properties of formant tuning method and CELP encoding process: (1) humans do not perceive alterations applied to formants; (2) CELP codec provides excellent quality speech at low bit rates by using the source-filter model and (3) CELP and watermarking based on formant tuning methods utilize lineal prediction coefficients for its process. Results revealed that the proposed method increased the detection rate and could satisfied inaudibility. |
(英) |
Unifying the code-excited linear prediction (CELP) codec process with the watermarking based on formant tuning method provides inaudibility and robustness. The serial problem of watermarking and then encoding by CELP codec is thereby reduced by the proposed method which also increased the bit detection rate. We took advantage of each key properties of formant tuning method and CELP encoding process: (1) humans do not perceive alterations applied to formants; (2) CELP codec provides excellent quality speech at low bit rates by using the source-filter model and (3) CELP and watermarking based on formant tuning methods utilize lineal prediction coefficients for its process. Results revealed that the proposed method increased the detection rate and could satisfied inaudibility. |
キーワード |
(和) |
CELP codec / speech watermarking / formant tunning / inaudibility / robustness / / / |
(英) |
CELP codec / speech watermarking / formant tunning / inaudibility / robustness / / / |
文献情報 |
信学技報, vol. 115, no. 221, EMM2015-37, pp. 39-44, 2015年9月. |
資料番号 |
EMM2015-37 |
発行日 |
2015-09-03 (LOIS, IE, EMM) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
PDFダウンロード |
LOIS2015-22 IE2015-54 EMM2015-37 |