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21. 发明专利

JP2002118504A VOICE COMMUNICATION SYSTEM 审中-公开
公开(公告)号：JP2002118504A
公开(公告)日：2002-04-19
申请号：JP2001227819
申请日：2001-07-27
申请人： TOSHIBA CORP
发明人： TSUKAHARA YURIKO , MINAMI SHIGENOBU , OKUDA YUJI
IPC分类号： G10L21/02 , G10L25/93 , H04B3/23 , H04M1/60 , G10L11/06
摘要： PROBLEM TO BE SOLVED: To provide a voice communication system which enhances an echo suppression effect and a noise suppression effect, by a method wherein a noise removal characteristic which takes into consideration the state of a received signal is given to a noise canceler, the influence of the noise canceler is not given to an echo canceler, and the influence of the echo canceler is not given to the noise canceler. SOLUTION: The echo canceler (20) which learns the relationship between the received signal and the echo of the received signal mixed with a transmitted input signal, which generates a pseudo echo estimated from the received signal, and which subtracts the pseudo echo from the transmitted input signal so as to suppress the echo, is installed. The noise canceler (1) which suppresses a noise mixed with the output of the echo canceler (20) is installed. According to whether the relationship is learned in the echo canceler (20), the characteristic of the noise canceler (1) is changed.

22. 发明专利

JP2001076273A HOME SECURITY SYSTEM 失效
公开(公告)号：JP2001076273A
公开(公告)日：2001-03-23
申请号：JP25074999
申请日：1999-09-03
申请人： TOSHIBA CORP
发明人： SAITO TATSUNORI , OKUDA YUJI , TSUKAHARA YURIKO , SUZUKI MASAKAZU , SHIRACHIKU MASAKI
IPC分类号： H04N5/232 , G08B25/08 , H04M11/00 , H04N7/18 , H04Q9/00 , H04W4/04 , H04Q7/38
摘要： PROBLEM TO BE SOLVED: To provide a home security system enabling an inhabitant to obtain detailed information on the inside/outside of his/her house from an outgoing destination and also to enable the inhabitant being away from home to identify a visitor and to confirm a business. SOLUTION: The home security system is provided with a communication equipment 105 provided with a monitoring camera 102, a highly-efficient moving image encoder 103 for highly efficiently encoding a photographed moving image and a call incoming/originating controller 104 for transmitting the moving image by a low bit rate to a communication terminal 106 having a call-incoming. The system is provided with a controller 101 for controlling the equipment 105 and a portable terminal 106 for communicating with the equipment 105 through a base station 107 and a communication line 108. Thus, an inhabitant can obtain detailed information on the inside/outside of his/her house at an outgoing destination, can identify a visitor and confirm its business.

23. 发明专利

JPH04357788A MOVING PICTURE ENCODING DEVICE AND MOVING PICTURE REPRODUCING DEVICE 失效
公开(公告)号：JPH04357788A
公开(公告)日：1992-12-10
申请号：JP13143291
申请日：1991-06-03
申请人： TOSHIBA CORP
发明人： TSUKAHARA YURIKO , WATANABE TOSHIAKI
IPC分类号： H04N5/44 , H04N19/102 , H04N19/136 , H04N19/137 , H04N19/154 , H04N19/176 , H04N19/196 , H04N19/33 , H04N19/423 , H04N19/46 , H04N19/50 , H04N19/503 , H04N19/51 , H04N19/61 , H04N19/625 , H04N19/70 , H04N19/80 , H04N19/85 , H04N19/91
摘要： PURPOSE:To prevent the increase of encoding amount and to improve the picture quality by comparing a transmission block with the synthesis value of the low- pass component of the former frame an the other component and performing inter-frame prediction or motion compensation. CONSTITUTION:In the intra-information, switches SW1 and SW2 are connected to terminals 9 and 27 respectively, and the transmission block is inputted to a first VLC circuit 15 through a conversion circuit 13 performing the discrete cosine change and a quantization circuit 14 and subjected to variable length- encoding. On the inter-information, the switches SW1 and SW2 are connected to terminals 12 and 26 respectively, and a differential signal is outputted through a subtracter 19 and subjected to variable length-encoding. When the current macro block is a meaningless block, a conversion coefficient is cleared to zero. The macro block quantized by the quantization circuit 14 is transferred after being subjected to variable length encoding in the first VLC circuit 15. The inverse quantization and the inverse conversion are performed in circuits 22 and 23, and signal is stored in the first memory 25 through an adder 24.

24. 发明专利

JPH04130862A PICTURE ENCODING SYSTEM 失效
公开(公告)号：JPH04130862A
公开(公告)日：1992-05-01
申请号：JP24995190
申请日：1990-09-21
申请人： TOSHIBA CORP
发明人： TSUKAHARA YURIKO , OZEKI KAZUO , AKAMINE MASAMI
IPC分类号： H04N1/41 , G06T9/00 , H04N1/415
摘要： PURPOSE:To improve the quality of a picture at the time of reproduction by recognizing the distribution of a conversion coefficient at the time of deciding a block size and selecting the block size lest the important conversion coefficient exists in an area which is to be omitted. CONSTITUTION:The address of a picture element left above the block which is initially encoded is outputted from a left above picture element address calculation circuit 102 to enlargement ratio judgement circuit 109. A quantized conversion coefficient matrix is transmitted to the enlargement ratio judgement circuit 109. It is checked whether a non-zero coefficient in the present block in the size of (iX4)X(jX4) exits in a part except for the left above part of 4X4. When the non-zero coefficient is not stored in the part of 4X4, furthermore enlargement is not executed. The conversion coefficient matrix stored in a memory 108 is encoded and outputted in an encoding circuit 104. When the non-zero coefficient is only in the left above part of 4X4, the conversion coefficient matrix of left above 4X4 is once stored in the memory 108 and the enlargement ratio (i) or (j) is increased. Then, the size of (iX4)X(jX4) is converted.

25. 发明专利

JPH04100379A IMAGE REPRODUCTION SYSTEM 失效
公开(公告)号：JPH04100379A
公开(公告)日：1992-04-02
申请号：JP21708190
申请日：1990-08-20
申请人： TOSHIBA CORP
发明人： TSUKAHARA YURIKO , KASA HIROSHI , WATANABE TOSHIAKI
IPC分类号： H04N1/393 , H04N1/41
摘要： PURPOSE:To increase or decrease the number of reproduction picture elements in a block in a short time by performing reverse conversion by using a conversion matrix which is different in degree from a conversion matrix used for the conversion of the block. CONSTITUTION:Codes of the block which is read are decoded by a decoding circuit 10 and reversely quantized by a reverse quantizing circuit 11 into NXM- conversion-coefficient matrixes. According to a reduction rate which is predetermined by a reduction rate determination part 16, a conversion coefficient matrix reducing circuit 12 leaves only (iXj) conversion coefficient matrixes and calls a matrix Ti of degree (i) and a matrix Tj of next degree (j) in a conversion matrix memory 15 and a reverse converting circuit 13 performs reverse conversion. The block after the reverse conversion is put into an image of one screen by a block composing circuit 14. At this time, the block of NXM constitution is converted to (i)X(j), so a reproduced image is reduced to size which is vertically i/N and horizontally j/M as large as the original image and the final reproduced image can be obtained in a short time.

26. 发明专利

JPH046953A PICTURE CODING SYSTEM 失效
公开(公告)号：JPH046953A
公开(公告)日：1992-01-10
申请号：JP10643390
申请日：1990-04-24
申请人： TOSHIBA CORP
发明人： TSUKAHARA YURIKO , AKAMINE MASAMI
IPC分类号： H04N1/41 , H03M7/30
摘要： PURPOSE:To decrease the transmission time and to improve the quality of a decoded picture by not implementing orthogonal transform to a block with less information quantity and not sending a transformation index. CONSTITUTION:An input is divided into rectangular blocks by a block division circuit 101 and each of the divided blocks is discriminated as to whether or not orthogonal transform is required at a discrimination circuit 103. When the discrimination circuit 103 discriminates it that no transformation is required, a mean value of picture elements in a block is calculated by a mean value calculation circuit 105 and the mean value is subject to linear quantization in a quantization circuit 107. Moreover, the result is subject to variable length coding in a coding circuit 109 and the result is outputted. The coded mean value is decoded and inverse-quantized at a decoding circuit 131 and an inverse quantization circuit 133. Then the mean value subject to inverse quantization is outputted as all picture elements in the block.

27. 发明专利

JPH03191676A IMAGE CODING SYSTEM 失效
公开(公告)号：JPH03191676A
公开(公告)日：1991-08-21
申请号：JP32951589
申请日：1989-12-21
申请人： TOSHIBA CORP
发明人： TSUKAHARA YURIKO , AKAMINE MASAMI
IPC分类号： H04N1/413
摘要： PURPOSE:To turn an image into a variable length code in a more adaptive way and to improve the compression factor by checking previously the converted surface dispersion value of data to be coded for each coefficient and changing the scanning way in accordance with different characteristics of those dispersion values. CONSTITUTION:An input image is divided into (NXN) rectangles by a block dividing circuit 11. Then the DTC is carried out also in an orthogonal conversion circuit 12, and the quantization is carried out in a quantization circuit 13. The coefficients of the quantized conversion surface blocks are rearranged by a 1-dimensional form generating circuit 14 in the order of the scan sequence memories 16. Thus these blocks are arranged into a 1-dimensional array. Then a 1st component is separately coded by a component VLC circuit 17. Other coefficients transformed into the 1-dimensional forms are turned into the variable length codes by a VLC circuit 15 via the phi run length or the EOB. As a result, the scanning order can be decided in such a way where '0' can be easily continuous. Then the variable length coding is attained with high efficiency.

28. 发明专利

JPH02117269A PICTURE ENCODING SYSTEM 失效
公开(公告)号：JPH02117269A
公开(公告)日：1990-05-01
申请号：JP26936388
申请日：1988-10-27
申请人： TOSHIBA CORP
发明人： TSUKAHARA YURIKO , WATANABE TOSHIAKI
IPC分类号： H04N1/415
摘要： PURPOSE:To always obtain high picture quality in a reproducing picture even when encoding processing is interrupted on the way of processing by providing a scanning circuit and an encoding circuit, etc., and transmitting in considering the local character of the picture at the respective stages of hierarchical encoding. CONSTITUTION:The picture information of an input still picture to be obtained by image pickup are inputted to a block dividing circuit 10 and in the circuit 10, the picture is divided into the two-dimensional block of 8 horizontal picture elements and 8 vertical picture elements. Next, linear quantization is executed for each block in a DCT circuit 11 and a quantizing circuit 12 and further, the block is converted to one-dimensional block in a one-dimensioning circuit 13. After that, an EOB symbol is added by an EOB symbol adding circuit 14 and the information are successively accumulated in a frame memory 15. Continuously, the information of one picture to be accumulated in the memory 15 are hierarchically encoded by a scanning circuit 16 and the after that, the encoding of the data at the respective stages is executed by using code tables 18 and 19 in an encoding circuit 17. Then, the transmission to consider the local character of the picture is executed at the respective stages of the hierarchical encoding.

29. 发明专利

JP2010158044A Signal processing apparatus and signal processing method 审中-公开
标题翻译：信号处理装置和信号处理方法
公开(公告)号：JP2010158044A
公开(公告)日：2010-07-15
申请号：JP2010030699
申请日：2010-02-15
申请人： Toshiba Corp , 株式会社東芝
发明人： TANIGUCHI TAKAYUKI , TSUKAHARA YURIKO , MISEKI KIMIO
IPC分类号： H04M1/60 , G10L19/00 , G10L21/02 , H03M7/30
摘要： PROBLEM TO BE SOLVED: To transmit/receive high-quality voice by enabling a noise suppressor to present sufficient functionality even when use settings are changed. SOLUTION: A voice encoder 120 comprises an A-scheme encoding unit 121, a B-scheme encoding unit 122 and a C-scheme encoding unit 123 as three circuits for encoding voice data in accordance with algorithms different from each other. A noise suppressor 110 comprises an X-scheme noise suppressing unit 111, a Y-scheme noise suppressing unit 112, and a Z-scheme noise suppressing unit 113 as three circuits for suppressing background noise in accordance with algorithms different from each other. A suppressing scheme switching control unit 114 is configured to function an optimal noise suppressing unit (any one of 111, 112, 113) in accordance with an encoding unit (any one of 121, 122, 123) functioned in the voice encoder 120 on the basis of information from an encoding scheme switching control unit 124. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：即使改变使用设置，通过使噪声抑制器能够呈现足够的功能来发送/接收高质量的语音。解决方案：语音编码器120包括作为用于根据彼此不同的算法对语音数据进行编码的三个电路的A方案编码单元121，B方式编码单元122和C方式编码单元123。噪声抑制器110包括作为用于根据彼此不同的算法来抑制背景噪声的三个电路的X方案噪声抑制单元111，Y方案噪声抑制单元112和Z方案噪声抑制单元113。抑制方式切换控制部114被配置为根据在语音编码器120中的功能的编码单位（121,122,123中的任一个），对最佳噪声抑制单元（111,112,113中的任一个）起作用来自编码方案切换控制单元124的信息的基础。版权所有（C）2010，JPO＆INPIT

30. 发明专利

JP2004032386A Voice communication unit and voice signal processing method 有权
公开(公告)号：JP2004032386A
公开(公告)日：2004-01-29
申请号：JP2002186079
申请日：2002-06-26
申请人： Toshiba Corp , 株式会社東芝
发明人： TSUKAHARA YURIKO
IPC分类号： H04M1/60 , H04B3/20
摘要： PROBLEM TO BE SOLVED: To provide a voice communication unit in which a function for determining the reception/transmission of a call can be obtained surely in voice communication using a communication terminal even when an echo returns with power higher than that of a receiving signal.
SOLUTION: A voice switch circuit 10 comprises a section 101 for calculating the power of a receiving signal and a transmitting signal, and a section 102 for calculating the covariance of each power value. A DTD 103 calculates four types of call reception/transmission determination results and controls the gain loss of the receiving or transmitting signal depending on the determination results.
COPYRIGHT: (C)2004,JPO

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