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11. 发明专利

JPH04362827A PACKET COMMUNICATION SYSTEM 失效
公开(公告)号：JPH04362827A
公开(公告)日：1992-12-15
申请号：JP16339691
申请日：1991-06-10
申请人： OKI ELECTRIC IND CO LTD
发明人： NOGUCHI OSAMU , YOKOTA KIYOSHI , EGUCHI KOHEI , MURAKAMI YOSHIYA
IPC分类号： H04Q11/04 , H04L12/70
摘要： PURPOSE:To reproduce accurate information at a receiver side and to build up the system with an inexpensive circuit even when a common clock source is not obtained for both transmission reception in the packet communication system in which a packet is sent in a real time. CONSTITUTION:A packet transmitter 10 uses a prescribed period signal generating circuit 144 to send a prescribed period signal ST synchronously with initial input information after setup with a receiver side equipment. A period display flag TF is fed to a packet composition circuit 130 in response to the signal ST. The packet composition circuit 130 adds a header with a periodic display added to information being a data cell at a real information data generating circuit 120 and sends the resulting packet. Then the prescribed period signal generating circuit 144 generates a period signal ST for each prescribed period regardless of the input of real information and the result is sent as the period packet. The receiver side corrects the generating timing of the recovered clock generated by its own equipment based on the incoming call time of the period packet to take synchronization with the sender side and the information is recovered from the received real information packet.

12. 发明专利

JPH02272835A VOICE SECTION DETECTION SYSTEM 失效
公开(公告)号：JPH02272835A
公开(公告)日：1990-11-07
申请号：JP9281689
申请日：1989-04-14
申请人： OKI ELECTRIC IND CO LTD
发明人： SHIRAKI YUICHI , NOGUCHI OSAMU
IPC分类号： G10L11/00 , G10L11/02 , G10L15/00 , G10L15/04 , H04J3/17 , H04L12/56 , H04M3/00
摘要： PURPOSE:To accurately estimate a new noise level even if the noise level fluctuates large, to update a power threshold and to reduce errorneous decision by updating the power threshold based on a specified system. CONSTITUTION:The power of noise in a power threshold calculation part 14 hardly exceeds the threshold, and it updates the power threshold based on the power level of silent section using a fixed value pfix having power more than the threshold in a voice when silence occurs by the present power threshold. On the other hand, the power threshold is updated based on the power level of the section when the section which comes less than the fixed value Pfix comes to more than the number of first blocks Ns by single, or when the sum of the sections to more than the number of second blocks NL after it rings by the present power threshold. Thus, the new noise level can accurately be estimated even if the noise level fluctuates large in the middle of communication, and the power threshold can be updated, whereby erroneous decision can be reduced.

13. 发明专利

JPH02268536A SWITCHING DEVICE AND PACKET SWITCHING MACHINE HAVING THE SAME 失效
公开(公告)号：JPH02268536A
公开(公告)日：1990-11-02
申请号：JP8987889
申请日：1989-04-11
申请人： OKI ELECTRIC IND CO LTD
发明人： ABE MASAMI , NOGUCHI OSAMU , SUZUKI TAKAO , SHOJI YASUO
IPC分类号： H04L12/729 , H04L12/937
摘要： PURPOSE:To attain the simplification of a binary switch comprising a switching device and to prevent the time sequence of a packet that belongs to the same call from being reversed within a switch by setting a single route at every information to be switched, for example, in call unit. CONSTITUTION:A route information attaching means 12 to receive the information and to attach route information routing in a switch network 10 on the information, and a header correspondence means 16 in which the route information is stored corresponding to an identification number included in inputted information are provided. Also, a link working status means 20 in which the working status of each link of the binary switch in the switch network 10 is stored, and a route setting control means 18 which performs the route setting of the information in the switch network 10 by input/output information are provided. Thereby, the constitution of the binary switch can be simplified, and the switching device in which no reversal of the time sequence of the packet that belongs to the same call occurs and a packet switching machine having the same device can be realized.

14. 发明专利

JPH02219100A VOICE DETECTION SYSTEM 失效
公开(公告)号：JPH02219100A
公开(公告)日：1990-08-31
申请号：JP3931589
申请日：1989-02-21
申请人： OKI ELECTRIC IND CO LTD
发明人： SHIRAKI YUICHI , NOGUCHI OSAMU , SUZUKI TAKAO , SHOJI YASUO
IPC分类号： G10L11/00 , G10L11/02 , G10L15/02 , G10L15/04
摘要： PURPOSE:To detect a consonant effectively by regarding a section other than three sections, derived from the nature of a voice, as a noise section and calculating a zero-cross different frequency threshold value successively from the zero-cross frequency distribution in the noise section. CONSTITUTION:An input sample signal is inputted to a power calculation part 11 and a zero-cross frequency calculation part 21 to calculate power P(i) and a zero-cross frequency Z(i) for each specific block length. The power P(i) calculated by the power calculation part 11 and a power threshold value Pth(i) outputted by a power threshold calculation part 13 are inputted to a detection part 12, which outputs a power detection signal Jp according to the large-small relation between the both. The zero-cross frequency Z(i) which is calculated by the zero-cross frequency calculation part 21 and the zero-cross frequency threshold value Zth(i) which is outputted from a zero-cross frequency threshold calculation part 23 are inputted to a zero-cross frequency detection part 22, which outputs a zero-cross frequency detection accumulation signal Jz according to the large-small relation between the both. Consequently, the constant can be detected without reference to the nature of a noise and without increasing malfunction due to a noise.

15. 发明专利

JPH021661A PACKET INTERPOLATION SYSTEM 失效
公开(公告)号：JPH021661A
公开(公告)日：1990-01-05
申请号：JP14160288
申请日：1988-06-10
申请人： OKI ELECTRIC IND CO LTD
发明人： YOKOTA KIYOSHI , SUZUKI TAKAO , NOGUCHI OSAMU , SHOJI YASUO
IPC分类号： G10L19/00 , H04B14/06 , H04L12/56
摘要： PURPOSE:To compensate the quality deterioration of sound due to the rejection of a packet by utilizing the pitch period of sound included in the decoding signal waveform of an ADPCM code in ADPCM interpolation. CONSTITUTION:A waveform substitution switching part 15 inputs an ADPCM interpolation input signal I(k) and an ADPCM interpolation generation signal IRE(k) and outputs an ADPCM interpolation output signal I0(k). A decoder 11 inputs it and outputs a decoding signal. The decoding signal is accumulated in a buffer memory update part 12, and an autocorrelation value R is calculated in an autocorrelation operation part 16. A pitch extraction decision part 17 outputs a pitch period estimation value PIT by the extraction and decision of the pitch based on the correlation value R. A memory pointer instruction part 13 outputs a decoding interpolation signal IBUFF(PIT) by the control of the estimation value PIT and a packet loss instruction signal L(k). An encoding part 14 encodes the output, and outputs the interpolation generation signal IRE(k).

16. 发明专利

JPH01183232A PRESENCE-OF-SPEECH DETECTION DEVICE 失效
公开(公告)号：JPH01183232A
公开(公告)日：1989-07-21
申请号：JP677188
申请日：1988-01-18
申请人： OKI ELECTRIC IND CO LTD
发明人： SUZUKI TAKAO , NOGUCHI OSAMU
IPC分类号： H04J3/17
摘要： PURPOSE:To precisely calculate a noise level and to attain presence-of-speech detection in which malfunction with respect to noise is less by setting a center clipping detection signal and a double talk detection signal to control signals which temporarily stop the update of a threshold. CONSTITUTION:An adaptive power threshold updating unit 264 in a presence-of- speech detection part 26 inputs the center clipping detection signal 512 and the double talk detection signal 514 from the coefficient calculator 126 in an echo cancel part 12. When either of the signals 512 or 514 is detected, an adaptive power threshold is not updated. A presence-of-speech decision unit 262 receives the short frame mean power output 700 of a power calculator 260 and the threshold output 702 of the threshold updating unit 264, compares them, and executes presence-of-speech decision. Thus, the noise level can precisely be calculated and presence-of-speech detection with less malfunction with respect to noise is attained.

17. 发明专利

JPS63283245A DIGITAL SOUND INSERTING SYSTEM 失效
公开(公告)号：JPS63283245A
公开(公告)日：1988-11-21
申请号：JP11708087
申请日：1987-05-15
申请人： OKI ELECTRIC IND CO LTD
发明人： SUZUKI TAKAO , SHIRAKI YUICHI , NOGUCHI OSAMU
IPC分类号： H04J3/17
摘要： PURPOSE:To prevent the lockout of the transient voice of a PCM channel having a high priority order from being generated, by deciding whether or not a voice operating ratio is a prescribed regulated value or above when a voice signal is inputted newly to an input channel not being allocated to an output channel, and updating the priority order of the input channel when it is the regulated value or above. CONSTITUTION:When an (n) channel voice detecting part 12 detects sound activity, the connection request of an input PCM channel is inputted to an allocation processor 13. The allocation processor 13, when the voice operating ratio of the PCM channel to be connected exceeds the regulated value, reads out the content of an overload allocation table register 24, and updates the content of a priority right allocation table register 13a incorporated in the allocation processor 13 according to the above content. Simultaneously, an allocation message is generated, and an output DSI subburst 103 is formed. In such a way, it is possible to prevent the lockout of the transient voice of the PCM channel having the high priority order from being generated even in a transient overload state.

18. 发明专利

JPS6116330A Bit shifting system 失效
标题翻译：位移系统
公开(公告)号：JPS6116330A
公开(公告)日：1986-01-24
申请号：JP13517784
申请日：1984-07-02
申请人： Oki Electric Ind Co Ltd
发明人： SHINPO ATSUSHI , HOSODA KENICHIROU , MIYAMOTO RIYOUICHI , NOGUCHI OSAMU
IPC分类号： G06F7/53 , G06F5/01 , G06F7/00 , G06F7/507 , G06F7/52 , G06F7/527 , G06F7/76
CPC分类号： G06F5/01 , G06F7/523
摘要： PURPOSE:To simplify the device constitution by controlling a multiplier and a multiplicand inputted to general multipliers to shift bits. CONSTITUTION:Data designating the address where optional data Y is stored is held in a register 14. An arithmetic result X of an ALU7 is inputted to a register 16. An output Y of a RAM15 is inputted to a multiplier input register MA9. An output X of a ROM17 is inputted to a multiplicand input register MB10. Data in registers MA9 and MB10 are multiplied by a multiplier 11, and a multiplier upper part output register MC12 or a multiplier lower part output register MD13 is selected, and data of the multiplication result is held in the selected register. Held data is inputted to the RAM15 through a data bus 1. Thus, data Y has bits shifted and is stored in the RAM15.
摘要翻译：目的：通过控制乘法器和被乘数输入到一般乘法器来移位来简化器件结构。构成：指定存储可选数据Y的地址的数据被保存在寄存器14中。ALU7的算术结果X被输入到寄存器16.RAM15的输出Y被输入到乘法器输入寄存器MA9。 ROM17的输出X被输入到被乘数输入寄存器MB10。寄存器MA9和MB10中的数据乘以乘法器11，选择乘法器上部输出寄存器MC12或乘法器下部输出寄存器MD13，乘法结果的数据保持在所选择的寄存器中。通过数据总线1将保存的数据输入到RAM15中。因此，数据Y被移位并被存储在RAM15中。

19. 发明专利

JP2539494B2 失效
公开(公告)号：JP2539494B2
公开(公告)日：1996-10-02
申请号：JP17265388
申请日：1988-07-13
申请人： OKI ELECTRIC IND CO LTD
发明人： ABE MASAMI , SUZUKI TAKAO , NOGUCHI OSAMU , SHOJI YASUO
IPC分类号： H04B14/04 , H04L12/00 , H04Q11/04 , H04L12/56

20. 发明专利

JP2530817B2 失效
公开(公告)号：JP2530817B2
公开(公告)日：1996-09-04
申请号：JP8818886
申请日：1986-04-18
申请人： OKI ELECTRIC IND CO LTD
发明人： ANDO HIROMI , NOGUCHI OSAMU , MYAMOTO RYOICHI , SAKATA YOSHIO
IPC分类号： H04B14/04 , H03M7/50

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