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    • 1. 发明授权
    • Controller providing gradual transition of multiple terminals from unicast transmission
    • 控制器从单播传输提供多个终端的逐渐转换
    • US09374231B2
    • 2016-06-21
    • US12728802
    • 2010-03-22
    • Raziel Haimi-CohenJohn Hearn
    • Raziel Haimi-CohenJohn Hearn
    • H04L12/18H04L29/06H04L12/761H04L12/741
    • H04L12/18H04L12/1836H04L12/185H04L12/1886H04L45/16H04L45/74H04L65/4076H04L65/4084
    • A controller in a video headend or other transmission element of a signal distribution system is operative to detect a condition in which unicast transmissions of a given content stream to a plurality of terminals meet a specified threshold. The controller starts a multicast transmission of the given content stream in response to the detected condition, and transitions at least one of the terminals to the multicast transmission. In one embodiment, the controller identifies at least one of the terminals as a terminal that will receive the multicast transmission of the given content stream in place of its unicast transmission prior to one or more of the other terminals receiving the multicast transmission. The controller stops the unicast transmission to the identified terminal if that unicast transmission has already been started, starts the multicast transmission, switches the identified terminal to the multicast transmission, and subsequently transitions one or more of the other terminals to the multicast transmission. The identified terminal may be a leading terminal or a trailing terminal.
    • 信号分配系统的视频头端或其他传输元件中的控制器可操作以检测给定多个终端的给定内容流的单播传输满足指定阈值的条件。 控制器响应于检测到的条件启动给定内容流的多播传输,并且将至少一个终端转换到多播传输。 在一个实施例中,控制器将终端中的至少一个识别为在接收多播传输的一个或多个其他终端之前将接收给定内容流的多播传输来代替其单播传输的终端。 如果单播传输已经开始,则控制器停止向所识别的终端的单播传输,开始组播传输,将所识别的终端切换到多播传输,并且随后将一个或多个其他终端转换成多播传输。 所识别的终端可以是前导终端或尾随终端。
    • 2. 发明申请
    • Controller Providing Gradual Transition of Multiple Terminals from Unicast Transmission
    • 控制器从单播传输提供多个终端的逐渐转换
    • US20110228769A1
    • 2011-09-22
    • US12728802
    • 2010-03-22
    • Raziel Haimi-CohenJohn Hearn
    • Raziel Haimi-CohenJohn Hearn
    • H04L12/56H04N7/173
    • H04L12/18H04L12/1836H04L12/185H04L12/1886H04L45/16H04L45/74H04L65/4076H04L65/4084
    • A controller in a video headend or other transmission element of a signal distribution system is operative to detect a condition in which unicast transmissions of a given content stream to a plurality of terminals meet a specified threshold. The controller starts a multicast transmission of the given content stream in response to the detected condition, and transitions at least one of the terminals to the multicast transmission. In one embodiment, the controller identifies at least one of the terminals as a terminal that will receive the multicast transmission of the given content stream in place of its unicast transmission prior to one or more of the other terminals receiving the multicast transmission. The controller stops the unicast transmission to the identified terminal if that unicast transmission has already been started, starts the multicast transmission, switches the identified terminal to the multicast transmission, and subsequently transitions one or more of the other terminals to the multicast transmission. The identified terminal may be a leading terminal or a trailing terminal.
    • 信号分配系统的视频头端或其他传输元件中的控制器可操作以检测给定多个终端的给定内容流的单播传输满足指定阈值的条件。 控制器响应于检测到的条件启动给定内容流的多播传输,并且将至少一个终端转换到多播传输。 在一个实施例中,控制器将终端中的至少一个识别为在接收多播传输的一个或多个其他终端之前将接收给定内容流的多播传输来代替其单播传输的终端。 如果单播传输已经开始,则控制器停止向所识别的终端的单播传输,开始组播传输,将所识别的终端切换到多播传输,并且随后将一个或多个其他终端转换成多播传输。 所识别的终端可以是前导终端或尾随终端。
    • 4. 发明申请
    • METHOD AND APPARATUS FOR FRAME-BASED BUFFER CONTROL IN A COMMUNICATION SYSTEM
    • 在通信系统中基于帧缓冲器控制的方法和装置
    • US20090052601A1
    • 2009-02-26
    • US12262239
    • 2008-10-31
    • Christof FallerRaziel Haimi-Cohen
    • Christof FallerRaziel Haimi-Cohen
    • H04L7/00
    • G10L19/167H04H60/27H04H2201/20H04J3/0632H04J3/1688H04N19/152
    • A method and apparatus are disclosed for controlling a buffer in a digital audio broadcasting (DAB) communication system. The decoder buffer level limits are specified in terms of a maximum number of encoded frames (or duration). The transmitter can predict the number of encoded frames, Fpred, in the decoder buffer and transmit the value, Fpred, to the receiver with the audio data. If the transmitter determines that the decoder buffer level is becoming too high, the frames being generated by the encoder are too small and additional bits are allocated to each frame for each of the N programs. Likewise, if the transmitter determines that the decoder buffer level is becoming too low, the frames being generated by the encoder are too big and fewer bits are allocated to each frame for each of the N programs. The transmitted predicted buffer level, Fpred, can also be employed to (i) determine when the decoder should commence decoding frames; and (ii) synchronize the transmitter and the receiver. The receiver fills the decoder buffer until Fpred frames are received before commencing decoding frames when the decoder first starts up or possibly when a new audio program is selected. The transmitter and receiver clocks may be synchronized by adjusting the clock at the receiver by using a feedback loop that compares the actual level of the decoder buffer to the predicted value, Fpred, received from the transmitter (a higher number of encoded frames in the buffer indicates that the clock of the receiver is too slow and should be increased, and a lower number of encoded frames in the buffer indicates that the clock of the receiver is too fast and needs to be slowed down).
    • 公开了一种用于控制数字音频广播(DAB)通信系统中的缓冲器的方法和装置。 解码器缓冲器电平限制是根据最大编码帧数(或持续时间)来指定的。 发射机可以在解码器缓冲器中预测编码帧数目Fpred,并将该值Fpred传送到具有音频数据的接收机。 如果发射机确定解码器缓冲器电平变得太高,则由编码器产生的帧太小,并且对于每个N个节目的每个帧分配附加比特。 类似地,如果发射机确定解码器缓冲器电平变得太低,则由编码器生成的帧太大,并且对于N个节目中的每个节目,每个帧分配更少的比特。 发送的预测缓冲器电平Fpred也可以用于(i)确定解码器何时开始解码帧; 和(ii)同步发射机和接收机。 接收器填充解码器缓冲器,直到当解码器首次启动或者当选择新的音频节目时才开始解码帧之前接收到Fpred帧。 发射机和接收机时钟可以通过使用将解码器缓冲器的实际电平与从发送器接收的预测值Fpred(缓冲器中更高数量的编码帧)进行比较的反馈回路来调整接收器处的时钟来同步 表示接收机的时钟太慢,应该增加,缓冲区中编码帧的数量越少表示接收机的时钟速度太快,需要减慢)。
    • 5. 发明授权
    • Methods and apparatus for the production of echo free side tones
    • 用于生产无回音侧音的方法和装置
    • US06751203B1
    • 2004-06-15
    • US09643165
    • 2000-08-21
    • Waleed EshmawyRaziel Haimi-Cohen
    • Waleed EshmawyRaziel Haimi-Cohen
    • H04B320
    • H04B3/23
    • A side tone generator which adjusts gain to compensate for echo effects is described. The side tone generator includes a gain unit which receives a voice signal and applies a gain to the voice signal to produce a side tone, and a summing unit which adds the side tone to a speech decoder signal. The side tone generator also includes a side tone gain adapter to adjust the gain added by the gain unit. The side tone gain adapter computes a default gain which would be applied in the absence of echo and multiplies the default gain by an echo correction factor based on the prevailing level of echo in order to determine the gain to be applied. In another embodiment, an echo canceller employs a filter which receives a filter input based on a speech decoder signal and produces a filter output reflecting an estimate of echo present in the speech decoder signal. The echo canceller also includes an output summing unit which subtracts the filter output from a voice signal to produce an echo canceller output. The echo canceller also includes a feedback loop which employs feedback from the filter output to refine the filter input. The echo canceller also includes a filter adapter which produces updated coefficients for the filter based on the echo canceller output, the voice signal and the filter input.
    • 描述了调整增益以补偿回波效应的侧音发生器。 侧音发生器包括增益单元,其接收语音信号并向声音信号施加增益以产生侧音,以及将侧音相加到语音解码器信号的求和单元。 侧音发生器还包括侧音增益适配器,用于调节增益单元所增加的增益。 侧音增益适配器计算将在没有回声的情况下应用的默认增益,并且基于当前的回波水平将默认增益乘以回波校正因子,以便确定要应用的增益。在另一实施例中, 回波消除器采用基于语音解码器信号接收滤波器输入的滤波器,并产生反映语音解码器信号中存在的回波估计的滤波器输出。 回波消除器还包括输出求和单元,其从语音信号中减去滤波器输出以产生回声消除器输出。 回波消除器还包括反馈回路,其采用来自滤波器输出的反馈来改善滤波器输入。 回波消除器还包括滤波器适配器,其基于回波消除器输出,语音信号和滤波器输入产生用于滤波器的更新系数。
    • 7. 发明授权
    • Method and apparatus for frame-based buffer control in a communication system
    • 通信系统中用于基于帧的缓冲器控制的方法和装置
    • US08724763B2
    • 2014-05-13
    • US12262239
    • 2008-10-31
    • Christof FallerRaziel Haimi-Cohen
    • Christof FallerRaziel Haimi-Cohen
    • H04L7/00
    • G10L19/167H04H60/27H04H2201/20H04J3/0632H04J3/1688H04N19/152
    • A method and apparatus are disclosed for controlling a buffer in a digital audio broadcasting (DAB) communication system. The transmitter predicts the number of encoded frames, Fpred, in the buffer having a limited level and transmits the value, Fpred, to the receiver with the frame. If the transmitter determines that the decoder buffer level is high, the frames being generated by the encoder are small and additional bits are allocated to each frame for each of the N programs. Likewise, if the transmitter determines that the decoder buffer level is becoming low, the frames being generated by the encoder are big and fewer bits are allocated to each frame for each of the N programs. The transmitted predicted buffer level, Fpred, can also be employed to (i) determine when the decoder should commence decoding frames; and (ii) synchronize the transmitter and the receiver clock using feedback depending on the compared level of the decoder to the actual level to Fpred.
    • 公开了一种用于控制数字音频广播(DAB)通信系统中的缓冲器的方法和装置。 发射机预测具有有限电平的缓冲器中的编码帧数目Fpred,并将该值Fpred发送给具有帧的接收机。 如果发射机确定解码器缓冲器电平为高,则由编码器产生的帧较小,并且对于N个节目中的每个节目的每个帧分配附加比特。 类似地,如果发射机确定解码器缓冲器电平变低,则由编码器产生的帧较大,并且对于N个节目中的每个节目,每个帧分配较少的比特。 发送的预测缓冲器电平Fpred也可以用于(i)确定解码器何时开始解码帧; 和(ii)使用反馈取决于解码器的比较水平与Fpred的实际水平来同步发射机和接收机时钟。
    • 8. 发明授权
    • Method and apparatus for frame-based buffer control in a communication system
    • 通信系统中用于基于帧的缓冲器控制的方法和装置
    • US07460629B2
    • 2008-12-02
    • US09895926
    • 2001-06-29
    • Christof FallerRaziel Haimi-Cohen
    • Christof FallerRaziel Haimi-Cohen
    • H04L7/00
    • G10L19/167H04H60/27H04H2201/20H04J3/0632H04J3/1688H04N19/152
    • A method and apparatus are disclosed for controlling a buffer in a digital audio broadcasting (DAB) communication system. The decoder buffer level limits are specified in terms of a maximum number of encoded frames (or duration). The transmitter can predict the number of encoded frames, Fpred, in the decoder buffer and transmit the value, Fpred, to the receiver with the audio data. If the transmitter determines that the decoder buffer level is becoming too high, the frames being generated by the encoder are too small and additional bits are allocated to each frame for each of the N programs. Likewise, if the transmitter determines that the decoder buffer level is becoming too low, the frames being generated by the encoder are too big and fewer bits are allocated to each frame for each of the N programs. The transmitted predicted buffer level, Fpred, can also be employed to (i) determine when the decoder should commence decoding frames; and (ii) synchronize the transmitter and the receiver. The receiver fills the decoder buffer until Fpred frames are received before commencing decoding frames when the decoder first starts up or possibly when a new audio program is selected. The transmitter and receiver clocks may be synchronized by adjusting the clock at the receiver by using a feedback loop that compares the actual level of the decoder buffer to the predicted value, Fpred, received from the transmitter (a higher number of encoded frames in the buffer indicates that the clock of the receiver is too slow and should be increased, and a lower number of encoded frames in the buffer indicates that the clock of the receiver is too fast and needs to be slowed down).
    • 公开了一种用于控制数字音频广播(DAB)通信系统中的缓冲器的方法和装置。 解码器缓冲器电平限制是根据最大编码帧数(或持续时间)来指定的。 发射机可以在解码器缓冲器中预测编码帧数目Fpred,并将该值Fpred传送到具有音频数据的接收机。 如果发射机确定解码器缓冲器电平变得太高,则由编码器产生的帧太小,并且对于每个N个节目的每个帧分配附加比特。 类似地,如果发射机确定解码器缓冲器电平变得太低,则由编码器生成的帧太大,并且对于N个节目中的每个节目,每个帧分配更少的比特。 发送的预测缓冲器电平Fpred也可以用于(i)确定解码器何时开始解码帧; 和(ii)同步发射机和接收机。 接收器填充解码器缓冲器,直到当解码器首次启动或者当选择新的音频节目时才开始解码帧之前接收到Fpred帧。 发射机和接收机时钟可以通过使用将解码器缓冲器的实际电平与从发送器接收的预测值Fpred(缓冲器中更高数量的编码帧)进行比较的反馈回路来调整接收器处的时钟来同步 表示接收机的时钟太慢,应该增加,缓冲区中编码帧的数量越少表示接收机的时钟速度太快,需要减慢)。
    • 9. 发明授权
    • Method and apparatus for recording and playing back a conversation using a digital wireless phone
    • 使用数字无线电话记录和回放对话的方法和装置
    • US06233320B1
    • 2001-05-15
    • US09337777
    • 1998-06-22
    • Raziel Haimi-Cohen
    • Raziel Haimi-Cohen
    • H04M1110
    • H04M1/656H04M1/72519
    • A wireless telephone with record and playback capability is disclosed. The telephone has an operation module, which transmits near-end signals and receives far-end signals, and a record module which writes transmission packets formed from the near-end signals in a first location of a memory and reception packets formed from the far-end signals in a second location of the memory. A playback module reads the transmission packets and the reception packets from the memory, and decodes the transmission packets into transmission speech samples and the reception packets into reception speech samples using transmission and reception decoders, respectively. Further, the playback module has a mixer to mix the transmission speech samples with the reception speech samples to form mixed speech signals for playback on a speaker. The playback module also includes a voice activity detector which outputs a skip signal to the transmission and reception decoders in response to detection of either voice in the transmission speech samples or silence in the reception speech samples. In response to the skip signal, the transmission and reception decoders discard a current transmission packet and a current receive packet and read a next transmission packet and a next reception packet from the memory.
    • 公开了具有记录和播放能力的无线电话。 电话具有发送近端信号并接收远端信号的操作模块,以及记录模块,其将从近端信号形成的发送分组写入到存储器的第一位置,以及由远端信号形成的接收分组, 结束信号在存储器的第二位置。 播放模块从存储器读取发送分组和接收分组,并且分别使用发送和接收解码器将传输分组解码为传输语音样本和接收分组到接收语音样本。 此外,重放模块具有混合器以将发送语音样本与接收语音样本混合,以形成用于在扬声器上回放的混合语音信号。 回放模块还包括语音活动检测器,其响应于发送语音样本中的任一语音的检测或接收语音样本中的静音而向发送和接收解码器输出跳过信号。 响应于跳过信号,发送和接收解码器丢弃当前传输分组和当前接收分组,并从存储器读取下一个传输分组和下一个接收分组。
    • 10. 发明授权
    • Methods and apparatus for identification and user prompting for storage of frequently used data items
    • 用于识别和用户提示存储常用数据项的方法和装置
    • US06760431B1
    • 2004-07-06
    • US09477974
    • 2000-01-05
    • Raziel Haimi-Cohen
    • Raziel Haimi-Cohen
    • H04M100
    • H04M1/274583H04M3/44
    • A device which stores frequently used data items in a retrieval list for easy retrieval and use. An example is a telephone operative to identify frequently-dialed telephone numbers and prompt a user to store frequently-dialed numbers in a speed-dial list. When a number is entered in the telephone, the number is compared with a log of stored numbers. Each stored number has an associated usage frequency. If the entered number is present in the log, the usage frequency of the entered number is updated. If the entered number is not present, the entered number is stored along with an initial usage frequency. The usage frequency of the number is compared against a predetermined criterion, and if the criterion is met the user is prompted to store the entered number in an empty space in the speed-dial list, or to replace an already existing entry in the speed-dial list with the entered number. Any of numerous alternatives may be chosen for prompting of the user and storage of the entered number. For example, the user may simply be presented with a decision as to whether to store the entered number. If the user answers affirmatively, the entered number may automatically be stored in the next available space, or if no empty space exists, the entered number may be stored in place of the least frequently used entry in the speed-dial list. Alternatively, menus and choices may be presented to allow the user control over storage of the entered number. If an entered number already exists in the speed-dial list, the user is reminded that the entered number is already present, in order to enhance user awareness of the speed-dial feature.
    • 将经常使用的数据项存储在检索列表中以便于检索和使用的设备。 一个例子是用于识别频繁拨打的电话号码并提示用户将频拨号码存储在快速拨号列表中的电话。 当电话中输入号码时,将该号码与存储号码的日志进行比较。 每个存储的号码具有相关联的使用频率。 如果输入的号码存在于日志中,则更新输入号码的使用频率。 如果输入的号码不存在,则输入的号码与初始使用频率一起存储。 将数字的使用频率与预定标准进行比较,并且如果满足标准,则提示用户将输入的号码存储在快速拨号列表中的空白空间中,或者替换速度列表中已存在的条目, 使用输入的号码拨打列表。 可以选择任何许多替代方案来提示用户和输入的号码的存储。 例如,可以简单地向用户呈现关于是否存储输入的号码的决定。 如果用户肯定地回答,输入的号码可以自动存储在下一个可用空间中,或者如果不存在空格,则可以存储输入的号码来代替快速拨号列表中最不常用的条目。 或者,可以呈现菜单和选择以允许用户控制输入的数字的存储。 如果快速拨号列表中已经存在输入的号码,则提醒用户输入的号码已经存在,以提高用户对快速拨号功能的意识。