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    • 2. 发明授权
    • Digital radio communication system with efficient audio and non-audio
data transmission
    • 数字无线电通信系统具有高效的音频和非音频数据传输
    • US5757788A
    • 1998-05-26
    • US585181
    • 1996-01-11
    • Akinori TatsumiMitsuhiro SuzukiMikio ShimazuSeiji Horii
    • Akinori TatsumiMitsuhiro SuzukiMikio ShimazuSeiji Horii
    • H04J3/22H04M1/725H04M11/06H04W4/18H04W72/12H04W88/06H04J3/12
    • H04W72/12H04J3/22H04M11/066H04M1/725H04N2007/145H04W4/18H04W88/06
    • In a radio communication system for performing digital radio communications by using time-division multiplexed time slots, a first personal station receives its user's speech through the microphone, converts it into audio data, and transmits them on time slots to a second personal station. On the other hand, the first personal station receives non-audio data from the data processor connected with the second personal station and stores. When the audio data amount inputted to the first personal station in a unit time period is lower than a threshold and the communications between the first personal station and the second personal station are put in a silence condition, the first personal station transmits non-audio data on times slots to the second personal station. When the communications return to a sound condition, audio data transmission is restored. Whether each time slot carries audio data or non-audio data is designated by an identifier which is written in a predetermined field of each time slot.
    • 在通过使用时分多路复用时隙进行数字无线电通信的无线电通信系统中,第一个人站通过麦克风接收其用户的语音,将其转换成音频数据,并将它们在时隙上发送到第二个人站。 另一方面,第一个人站从与第二个人站连接的数据处理器接收非音频数据并存储。 当在单位时间内输入到第一个人站的音频数据量低于阈值时,第一个人站和第二个人站之间的通信处于静音状态时,第一个人站发送非音频数据 在第二个个人站的时间。 当通信返回到声音状态时,恢复音频数据传输。 每个时隙中是否承载音频数据或非音频数据是由每个时隙的预定字段中写入的标识符指定的。
    • 4. 发明申请
    • Packet-relay unit
    • 分组中继单元
    • US20070133552A1
    • 2007-06-14
    • US10588110
    • 2005-03-28
    • Seiji KuboMikio ShimazuMakoto MatuokaMichinori KishimotoYuji Shimizu
    • Seiji KuboMikio ShimazuMakoto MatuokaMichinori KishimotoYuji Shimizu
    • H04L12/56H04L12/26
    • H04L47/10H04L47/14H04L47/2441H04L47/2458H04L47/2491
    • A packet-relay unit 100 including a first interface unit (110), a second interface unit (120), and a function-setting switch (130). The second interface unit (120) includes a classifying unit (121), a priority control unit (122), and a transceiving unit (123). When the function-setting switch (130) sets a “QoS function” as “operative”, the classifying unit (121) transfers packets transferred from the first interface unit (110) to the priority control unit (122). The priority control unit (122) provides priority control over the transferred packets such that the transferred packets are preferentially treated at a wireless zone connected to the second interface unit (120), whereby the priority-controlled packets are transferred to a transceiving unit (123) from the priority control unit (122). When the function-setting switch (130) sets “the QoS function” as “inoperative”, the classifying unit (121) transfers the transferred packets directly to the transceiving unit (123).
    • 包括第一接口单元(110),第二接口单元(120)和功能设置开关(130)的分组中继单元100。 第二接口单元(120)包括分类单元(121),优先级控制单元(122)和收发单元(123)。 当功能设定开关(130)将“功能”功能设定为“可操作”时,分类单元(121)将从第一接口单元(110)传送的分组传送到优先控制单元(122)。 优先级控制单元(122)对传送的分组提供优先级控制,使得在连接到第二接口单元(120)的无线区域优先处理所传送的分组,由此优先级控制的分组被传送到收发单元(123 )从优先级控制单元(122)发送。 功能设定开关130将“QoS功能”设定为“不起作用”时,分类单元121将传送的分组直接传送到收发单元123。
    • 5. 发明授权
    • Apparatus for and method of embedding and extracting digital information and medium having program for carrying out the method recorded thereon
    • 用于嵌入和提取数字信息的装置和方法以及具有用于执行记录在其上的方法的程序的介质
    • US06477276B1
    • 2002-11-05
    • US09186375
    • 1998-11-05
    • Hisashi InoueShiro IwasakiMikio ShimazuShuichi OjimaTakashi KatsuraAkio MiyazakiEiichi Hatae
    • Hisashi InoueShiro IwasakiMikio ShimazuShuichi OjimaTakashi KatsuraAkio MiyazakiEiichi Hatae
    • G06K936
    • H04N19/645G06T1/005G06T2201/0051G06T2201/0052G06T2201/0061G06T2201/0065H04N1/32154H04N1/3216H04N1/32165H04N1/3217H04N1/32176H04N1/32187H04N1/32277H04N2201/3233H04N2201/327
    • An apparatus for embedding information in a signal includes a band dividing device, a block divider, a quantization portion, a signal replacement portion, a mean difference addition portion, a mean calculation portion, and a band synthesis portion. The band dividing device divides the signal into transform coefficients over a plurality of frequency bands. The block divider divides one frequency band into a plurality of blocks in accordance with a previously determined block size. The quantization portion calculates for each block, a mean value M of the transform coefficients in the block, and subjects the mean value M to linear quantization, using a previously determined quantization step-size Q to calculate a quantization value. The signal replacement portion replaces the quantization value for each block, on the basis of the quantization value and the value of the information to be embedded. The mean difference addition portion subjects the replaced quantization value, for each block, to inverse linear quantization using the quantization step-size Q to calculate a mean value M′, and adds a difference DM between the mean value M′ and the mean value M to all the transform coefficients in the block. The mean calculation portion calculates a mean value LM of the transform coefficients in the frequency band after the addition of the difference DM. The band synthesis portion reconstructs a signal in which the information has been embedded using the frequency band after the addition of the difference DM and the other frequency bands.
    • 用于在信号中嵌入信息的装置包括带分割装置,块分割器,量化部分,信号替换部分,平均差加法部分,平均计算部分和频带合成部分。 频带划分装置将信号划分成多个频带的变换系数。 块分割器根据先前确定的块大小将一个频带划分成多个块。 量化部分针对每个块计算块中的变换系数的平均值M,并使用预先确定的量化步长Q对平均值M进行线性量化,以计算量化值。 信号替换部分基于量化值和要嵌入的信息的值替换每个块的量化值。 平均差分加法部分使用量化步长Q对每个块对替换的量化值进行逆线性量化,以计算平均值M',并将平均值M'和平均值M 到块中的所有变换系数。 平均计算部分计算差DM之后的频带中的变换系数的平均值LM。 频带合成部分在添加差分DM和其他频带之后,使用频带重建信息已被嵌入的信号。