ITOH SHUICHI
| Emeritus Professor etc. | Emeritus Professor |
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Paper
- データ処理性能を改善するXML文書のコンパクト化法の開発
吉田 茂; 中島 哲; 小田切 淳一; 伊藤 秀一
電子情報通信学会論文誌Ｄ, J89-D, 4, 767-777, Apr. 2006, Peer-reviwed
Scientific journal, Japanese - PIM-SMの解析に基づきマルチキャストトラヒックの振舞いを分析するパフォーマンスアナライザ
植野 誠史; 加藤 聰彦; 伊藤 秀一
電子情報通信学会論文誌Ｄ１, J87-D1, 5, 580-590, May 2004, Peer-reviwed
Scientific journal, Japanese - MNからの発呼トラヒックに対するHA機能をFAにもたせるMobile IP通信方式
加藤 聰彦; 原 正寛; 伊藤 秀一; 飯作 俊一
電子情報通信学会論文誌Ｄ１, The Institute of Electronics, Information and Communication Engineers, J87-D1, 5, 516-525, May 2004, Peer-reviwed, 携帯電話などを用いた大規模なモバイルインターネットの基本プロトコルとして,Mobile IPプロトコルが採用されつつある.ここでは,無線リンクを介してMNを収容する機能はFAにより実現され,HAはモバイルインターネットバックボーンの中で,MNの移動管理のみを行う構成になっている.このため大規模なモバイルインターネットにおいては,MNへのトラヒックをFAあてにフォワーデイングするというHAでのフォワーデイング処理のオーバヘッドが大きな課題になると考えられる.本論文では,この問題を解決するために,MNが移動先で発呼する場合は,移動先のFAにIPアドレスの割当を要求し,更にアドレスを割り当てられている間はそのFAがホームエージェントの機能を果たすMobile IPプロトコルを提案する.更にそれによるHAのフォワーデイング負荷の軽減及び移動先で用意すべきIPアドレス数についての評価結果を示す.
Scientific journal, Japanese - A proposal of scalable QoS guaranteed mobile IP communication using MPLS path with pre-allocated bandwidth
W Liu; T Kato; S Ueno; S Itoh
IEICE TRANSACTIONS ON COMMUNICATIONS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E87B, 3, 587-597, Mar. 2004, Peer-reviwed, Resulting from the spread of Mobile Internet, the mobile communication with QoS guarantee will be required in order to realize mobile video interactions. So far, there are some studies focusing on QoS Mobile IP communication, but they require backbone routers to maintain perflow QoS information for all individual Mobile Nodes. So these approaches suffer from the lack of scalability. Against them, we are developing an approach which the per-flow QoS information is maintained only by Mobile IP agents such as the Home Agent and the Foreign Agent. We have adopted a hierarchical method with MPLS which MPLS paths with large bandwidth are introduced between Mobile IP related nodes, and a per-flow path with small bandwidth called Pathlet is established for individual communication between a Mobile Node and a Fixed Host. The maintenance of Pathlets is only performed by Home Agent, Foreign Agent and Fixed Host, and the network backbone MPLS routers only take care of MPLS paths with large bandwidth. In the simulation, we compare our scheme with conventional scheme by observing the total number of entries managed by routers and bandwidth prepared at individual links.
Scientific journal, English - On sampling in shift invariant spaces
W Chen; S Itoh; J Shiki
IEEE TRANSACTIONS ON INFORMATION THEORY, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 48, 10, 2802-2810, Oct. 2002, Peer-reviwed, In this correspondence, a necessary and sufficient condition for sampling in the general framework of shift-invariant spaces is derived. Then this result is applied, respectively, to the regular sampling and the perturbation of regular sampling in shift-invariant spaces. A simple necessary and sufficient condition for regular sampling in shift-invariant spaces is attained. Furthermore, an improved estimate for the perturbation is derived for the perturbation of regular sampling in shift-invariant spaces. The derived estimate is easy to calculate, and shown to be optimal in some shift-invariant spaces. The algorithm to calculate the reconstruction frame is also presented in this correspondence.
Scientific journal, English - MDL基準と領域分割を用いたオプティカルフロー推定
Hideaki Tsuchiya; Noburu Uemura; Shuichi Itoh
電子情報通信学会論文誌, J85-D2, 4, 575-583, Apr. 2002, Peer-reviwed
Scientific journal, Japanese - ``Defocusを伴った画像Mosaicing''
T. Lien; 土屋英亮; 伊藤秀一
第24回情報理論とその応用シンポジウム予稿集, Dec. 2001
Japanese - ``二分木分割の空間はどのくらい大きいか''
伊藤秀一; 中村諭; 田口哲典
第24回情報理論とその応用シンポジウム予稿集, Dec. 2001
Japanese - Supremum of Perturbation for Sampling in Shift Invariant Subspace
W. Chen; S. Itoh; J. Shiki
IEICE Trans. Fundamentals., E84-A, 8, 1990-1996, Aug. 2001, Peer-reviwed
Scientific journal, English - ``MDL基準と領域分割を用いたオプティカルフロー推定''
植村 伸; 土屋 英亮; 伊藤 秀一
第23回情報理論とその応用シンポジウム予稿集, 515-518, Oct. 2000
Japanese - ``チャンネル間干渉を無くしたCDMA方式の受信側における計算精度の一検討''
岡本 剛志; 陳 傑; 末広 直樹; 伊藤 秀一
第23回情報理論とその応用シンポジウム予稿集, 567-570, Oct. 2000
Japanese - ``ステレオ画像のモデル化とデータ圧縮''
田口 哲典; 伊藤 秀一
第23回情報理論とその応用シンポジウム予稿集, 615-618, Oct. 2000
Japanese - ``文書画像のデータ圧縮と文書処理''
小泉 敦延; 伊藤 秀一
2000年情報的学習理論ワークショップ予稿集, 183-188, Jul. 2000
Japanese - ``文書画像の圧縮とその構造抽出''
中村 諭; 中野 大輔; 伊藤 秀一
第22回情報理論とその応用シンポジウム予稿集, 677-680, Dec. 1999
English - ``整数ウェーブレット変換を用いたステレオマッチング法''
山崎 健史; 陳 傑; トスコーン パンリット; 伊藤 秀一
第22回情報理論とその応用シンポジウム予稿集, 825-828, Dec. 1999
Japanese - ``整数ウェーブレット変換を用いた心電図圧縮''
佐原 紀和; 陳 傑; トスコーン パンリット; 伊藤 秀一
第22回情報理論とその応用シンポジウム予稿集, 829-832, Dec. 1999
Japanese - Digital-Controlled Analog Circuits for Weighted-Sum Operations: Architecture, Implementation and Applications
Jie Chen; G. L. Shou; C. M. Zhou
IEICE Trans. Fundamentals, E82-A, 11, Nov. 1999, Peer-reviwed
Scientific journal, English - ``Lossy to Lossless Compression of ECG by Using Integer Wavelet Transform''
Jie Chen; T. Panrit; Wen Chen; S.Itoh
the European Medical and Biological Engineering Conference, EMBEC'99, Viennna, Austria, Nov. 1999
English - ``The Error Estimation of sampling in wavelet subspaces''
W. Chen; S. Itoh; J. Shiki
IEICE Trans. Fundamentals, 82, 5, 835-841, May 1999, Peer-reviwed
Scientific journal, English - Lossy to Lossless Compression of ECG by Using Integer Wavelet Transform
Jie Chen; Wen Chen; Shuichi Itoh
Medical and Biological Engineering and Computing, 37, 2, 1610-1611, Feb. 1999, Peer-reviwed
Scientific journal, English - A wavelet transform-based ECG compression method guaranteeing desired signal quality
J Chen; S Itoh
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 45, 12, 1414-1419, Dec. 1998, Peer-reviwed, This paper presents a new electrocardiogram (ECG) compression method based on orthonormal wavelet transform and an adaptive quantization strategy, by which a predetermined percent root mean square difference (PRD) can he guaranteed with high compression ratio and low implementation complexity.
Scientific journal, English - 逆問題への混合モデルの導入とステレオ画像解析への応用
柳澤 亨; 志記潤二; 伊藤秀一
第21回情報理論とその応用シンポジウム予稿集, 45-48, Dec. 1998
Japanese - 折れ線モデルを利用した確率分布の推定とデータ圧縮
松岡隆仁; 志記潤二; 伊藤秀一
第21回情報理論とその応用シンポジウム予稿集, 217-220, Dec. 1998
Japanese - 折れ線モデルを利用した条件付き確率の推定
高橋一晃; 志記潤二; 土屋英亮; 伊藤秀一
第21回情報理論とその応用シンポジウム予稿集, 221-224, Dec. 1998
Japanese - Introduction to Image Coding by Integer Wavelet
Wen Chen; Shuichi Itoh; Junji Shiki
The 21st Symposium on Information Theory and Its Applications, 815-818, Dec. 1998
English - Some Notes on Reconstructing Regulary Smapled Siganls by Scaling Functions with Oversampling Property（letter）
W. Chen; S. Itoh
IEICE Trans. Fundamentals, 81, 11, 2467-2469, Nov. 1998, Peer-reviwed
Scientific journal, English - The Truncation Error and Aliasing Error of Sampling Theorem for Wavelet Subspaces
W.Chen; S. Itoh; J. Shiki
Proc. ISITA, Mexico City, 213-214, Oct. 1998
English - Image Compression using Integer Wavelet Transform
T. Panrit; Jie Chen; S. Itoh
第13回画像符号化シンポジウム,軽井沢, 83-84, Oct. 1998
English - An Estimate of Irregular Sampling in Wavelet Subspaces（letter）
W. Chen; S. Itoh
IEICE Trans. Fundamentals, 81, 8, 1751-1754, Aug. 1998, Peer-reviwed
Scientific journal, English - MDLの画像処理への応用
伊藤秀一; 土屋英亮
IBIS '98 1998情報論的学習理論ワークショップ，招待講演, 17-24, Jul. 1998
Japanese - MDL符号と情報源モデル
伊藤秀一
応用数理, 8, 2, 21-28, Jun. 1998
Japanese - 文章集合における重要語の抽出
小泉敦延; 奥田 敬; 伊藤秀一
信学技報, DE98-1-9, 1-6, May 1998
Japanese - Irregular sampling theorems for wavelet subspaces
W Chen; S Itoh; J Shiki
IEEE TRANSACTIONS ON INFORMATION THEORY, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 44, 3, 1131-1142, May 1998, From the Paley-Wiener 1/4-theorem, the finite energy signal f(t) can be reconstructed from its irregularly sampled values f(k + delta(k)) if f(t) is band-limited and sup(k) {delta(k)} < 1/4. We consider the signals in wavelet subspaces and wish to recover the signals from its irregular samples by using scaling functions. Then the way to estimate the upper bound of sup(k) \delta(k)\ such that the irregularly sampled signals can be recovered is very important. Following the work done by Liu and Waiter, we present an algorithm which can estimate a proper upper bound of sup(k) \delta(k)\. Compared to Paley-Wiener 1/4-theorem, this theorem can relax the upper bound fdr sampling in some wavelet subspaces.
Scientific journal, English - Oversampling Theorem for Wavelet Subspace
Wen Chen; Shuichi Itoh
IEICE Transactions on Fundamentals, E81-A, 1, 131-138, Jan. 1998
English - A Sampling Theorem for Shift Invariant Subspaces（letter）
W. Chen; S. Itoh
IEEE Trans. Signal Processing, 46, 10, 1841-1844, 1998, Peer-reviwed
Scientific journal, English - Irregular sampling in shift invariant subspace
W. Chen; S. Itoh
Symposium on Application of Wavelet, 2-6, 1998
English - Introduction to image coding by integer wavelet
W. Chen; S. Itoh
Proc. SITA, 815-818, 1998
English - 文書集合からの重用語の抽出について
奥田 敬; 小泉敦延; 伊藤秀一
情報理論とその応用学会,SITA-97, 245-248, Dec. 1997
Japanese - MDL原理を用いた領域分割法による画像の無歪みデータ圧縮及びプログレッシブな伝送
朱 蓉; 土屋英亮; 伊藤秀一
情報理論とその応用学会,SITA-97, 621-624, Dec. 1997
Japanese - ステレオ航空写真からの３次元情報の抽出とデータの圧縮
Qun Gong; 宮島まどか; 大塚 研; 志記潤二; 伊藤秀一
情報理論とその応用学会,SITA-97, 625-628, Dec. 1997
Japanese - Signal Reconstruction by Scaling Function with Over-sampling Property
Wen Chen; Shuichi Itoh
Symposium on Information Theory and Its Applications，SITA-97, 20, 2, 745-748, Dec. 1997
English - 雑音の下での三次元図形の推定
土屋英亮; 伊藤秀一
情報理論とその応用学会，SITA-97, 801-804, Dec. 1997
Japanese - On Irregular Sampling in Wavelet Subspaces
Wen Chen; Shuichi Itoh
IEICE Transactions on Fundamentals, E80-A, 7, 1299-1307, Jul. 1997
English - Irregular Sampling Theorems for Wavelet Subspaces
Wen Chen; Shuichi Itoh; Junji Shiki
IEEE International Symposium on Information Theory, ISIT-97, Ulm, Germany, 244, Jul. 1997
English - On the construction of geometrically uniform codes with L x MPSK constellations
TC Dinh; T Hashimoto; S Itoh
IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E80A, 3, 598-605, Mar. 1997, Peer-reviwed, For L greater than or equal to 2, M greater than or equal to 8, and transmission rate R = (log(2) M - 1) bit/sym, a method for constructing GU trellis codes with L x MPSK constellations is proposed and it is shown that the maximally achievable free distance is twice larger than it was previously reported for GU codes. Besides being geometrically uniform, these codes perform as good as Pietrobon's non-GU trellis codes with multidimensional MPSK constellations.
Scientific journal, English - MDL原理と2分木構造セグメンテーションを用いた画像の無ひずみ符号化アルゴリズム
土屋 英亮; 伊藤; 秀一; 渡辺 修史
電子情報通信学会論文誌 D, J80-D2, 2, 415-425, Feb. 1997, Peer-reviwed
Scientific journal, Japanese - 情報のディジタル伝送
伊藤秀一; 有本 卓
森北出版, 1997
Japanese - ウェーブレットによる不均等標本化定理
陳文; 伊藤秀一; 志記潤二
電子情報通信学会論文誌Ｄ, J79-A, 12, 1941-1947, Dec. 1996, Peer-reviwed
Scientific journal, Japanese - An Algorithm for Designing a Pattern Classifier by Using MDL Criterion
Hideaki TSUCHIYA; Shuichi ITOH; Takeshi HASHIMOTO
IEICE Transactions on Fundamentals, E79-A, 6, 910-920, Jun. 1996, Peer-reviwed
Scientific journal, English - ECG DATA-COMPRESSION BY USING WAVELET TRANSFORM
J CHEN; S ITOH; T HASHIMOTO
IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS, IEICE-INST ELECTRON INFO COMMUN ENG, E76D, 12, 1454-1461, Dec. 1993, Peer-reviwed, A new method for the compression of electrocardiographic (ECG) data is presented. The method is based on the orthonormal wavelet analysis recently developed in applied mathematics. By using wavelet transform, the original signal is decomposed into a set of sub-signals with different frequency channels corresponding to the different physical features of the signal. By utilizing the optimum bit allocation scheme, each decomposed sub-signal is treated according to its contribution to the total reconstruction distortion and to the bit rate. In our experiments, compression ratios (CR) from 13.5 : 1 to 22.9 : 1 with the corresponding percent rms difference (PRD) between 5.5% and 13.3% have been obtained at a clinically acceptable signal quality. Experimental results show that the proposed method seems suitable for the compression of ECG data in the sense of high compression ratio and high speed.
Scientific journal, English - Wavelet Pyramid Image Coding with Predictable and Controllable Subjective Picture Quality
Jie CHEN; Shuichi ITOH; Takeshi HASHIMOTO
IEICE TRANSACTIONS on Fundamentals, E76-A, 9, 1458-1468, Sep. 1993, Peer-reviwed
Scientific journal, English - Scalar Quantization Noise Analysis and Optimal Bit Allocation for Wavelet Pyramid Image Coding
Jie CHEN; Shuichi ITOH; Takeshi HASHIMOTO
IEICE TRANSACTIONS on Fundamentals, E76-A, 9, 1502-1514, Sep. 1993, Peer-reviwed
Scientific journal, English - An Adaptive Noiseless Coding for Sources with Big Alphabet Size
Shuichi ITOH; Nobuyasu GOTO
IEICE TRANSACTIONS on Fundamentals, E74-A, 9, 2495-2503, Sep. 1991, Peer-reviwed
Scientific journal, English - 入力パターンを推定する適応カルマンフィルタ
小山智史; 野島秀夫; 伊藤秀一
電子情報通信学会論文誌Ａ, J72-A, 11, 1926-1928, Nov. 1989, Peer-reviwed
Scientific journal, Japanese