公开(公告)号：WO9749235A8

公开(公告)日：2001-07-26

申请号：PCT/JP9700395

申请日：1997-02-13

Applicant: IBM JAPAN ,  IBM

Inventor： NUMAO MASAYUKI ,  SHIMIZU SHUICHI ,  MORIMOTO NORISHIGE ,  KOBAYASHI MEI

IPC: G06T1/00 ,  G09C5/00 ,  H04N1/32 ,  H04N1/44 ,  H04N1/387

CPC classification number: H04N1/32203 ,  G06T1/0021 ,  G06T2201/0051 ,  G06T2201/0061 ,  G09C5/00 ,  H04N1/32208 ,  H04N1/32251 ,  H04N1/32309 ,  H04N21/23892 ,  H04N21/8358 ,  H04N2201/3233 ,  H04N2201/327

Abstract: A data hiding method for hiding message data in media data and a data extracting method for extracting message data hidden in the media data. In the data hiding method, the message data are dispersedly hidden in the media data so that no third person can alter the message data. Specifically, the array elements of a message array are dispersedly hidden in a media array based on a status value S designating a specific array element in the media array when the media data and message data are expressed as the media array and the message array, respectively. The hiding method includes (a) a step of determining the j-th (j>/=0) status value Sj, (b) a step of determining the (j+1)-th status value Sj+1 based on the value Sj, the array element of the media array designated by the value Sj and the above-mentioned array element of the message array, and (c) a step of hiding data to be hidden in the array element of the media array designated by the value Sj+1.

Abstract translation: 用于在媒体数据中隐藏消息数据的数据隐藏方法和用于提取隐藏在媒体数据中的消息数据的数据提取方法。 在数据隐藏方法中，消息数据被分散地隐藏在媒体数据中，使得没有第三人可以改变消息数据。 具体地说，当媒体数据和消息数据被分别表示为媒体数组和消息数组时，消息数组的数组元素基于指定媒体阵列中的特定数组元素的状态值S而被分散地隐藏在媒体数组中 。 隐藏方法包括（a）确定第j（j> / = 0）状态值Sj的步骤，（b）基于该值确定第（j + 1）状态值Sj + 1的步骤 Sj，由值Sj指定的媒体阵列的数组元素和消息数组的上述数组元素，以及（c）隐藏要由值指定的媒体阵列的数组元素中隐藏的数据的步骤 SJ + 1。

公开(公告)号：JPH0895589A

公开(公告)日：1996-04-12

申请号：JP22666794

申请日：1994-09-21

Applicant: IBM JAPAN

Inventor： SAKAMOTO MASAHARU ,  KOBAYASHI MEI ,  SAITO TAKASHI ,  NISHIMURA MASAFUMI

IPC: G10L15/02 ,  G06F17/14 ,  G10L11/00 ,  G10L13/00 ,  G10L13/06 ,  G10L13/08 ,  G10L21/06 ,  G10L3/00 ,  G10L9/16

Abstract: PURPOSE: To provide a stable speech synthesis processing with the reduced tremble of pitch in a speech synthesizer system utilizing a pitch synchronized waveform superposition method. CONSTITUTION: A glottis closing point is made to be the reference point of superposition (pitch mark). Since the glottis closing point is stably and accurately extracted by using a dynamic wavelet transformation, a speech with few trembling and few gurgling is synthesized by its stability. By setting the reference point of superposition on another position from the reference point of waveform cutout, the softer cutout of a wave form is enabled. Extraction of the glottis closing point is performed by searching the local peak of dynamic wavelet transformation, however, preferably the threshold for searching the local peak of dynamic wavelet transformation is adaptively controlled every time when dynamic wavelet transformation is obtained.