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    Method and apparatus for frame-based buffer control in a communication system
    1.
    发明授权
    Method and apparatus for frame-based buffer control in a communication system 有权
    通信系统中用于基于帧的缓冲器控制的方法和装置

    公开(公告)号：US08724763B2

    公开(公告)日：2014-05-13

    申请号：US12262239

    申请日：2008-10-31

    申请人： Christof Faller ,  Raziel Haimi-Cohen

    发明人： Christof Faller ,  Raziel Haimi-Cohen

    IPC分类号： H04L7/00

    CPC分类号： G10L19/167 ,  H04H60/27 ,  H04H2201/20 ,  H04J3/0632 ,  H04J3/1688 ,  H04N19/152

    摘要： 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.

    摘要翻译： 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。

    Method and apparatus for statistically multiplexing services
    2.
    发明授权
    Method and apparatus for statistically multiplexing services 有权
    用于统计复用业务的方法和装置

    公开(公告)号：US07843824B2

    公开(公告)日：2010-11-30

    申请号：US11620768

    申请日：2007-01-08

    申请人： Siu-Wai Wu

    发明人： Siu-Wai Wu

    IPC分类号： G01R31/08

    CPC分类号： H04J3/1688 ,  H04N19/115 ,  H04N19/146 ,  H04N19/15 ,  H04N19/162 ,  H04N19/172 ,  H04N19/40 ,  H04N21/2365 ,  H04N21/23655 ,  H04N21/2383 ,  H04N21/26216 ,  H04N21/2662 ,  H04N21/4347

    摘要： One aspect of the invention relates to statistically multiplexing first services and second services in a group. A measure of required bandwidth for the first services is obtained, where the first services comprise pre-encoded services. An available encoding bandwidth for the second services is determined from a group bandwidth for the first and second services using the measure of required bandwidth. An encoding bit rate is allocated to each of the second services based on the available encoding bandwidth. Each of the second services is encoded in accordance with the encoding bit rate thereof. One or more services of the first services and the second services are transcoded and a multiplex is formed. Since the available encoding bandwidth for the second services is determined using the measure of required bandwidth for the first services, transcoding of the second services is minimized, and video quality is maximized.

    摘要翻译： 本发明的一个方面涉及统一复用组中的第一服务和第二服务。 获得第一服务所需带宽的度量，其中第一服务包括预编码服务。 使用所需带宽的度量，从用于第一和第二服务的组带宽确定用于第二服务的可用编码带宽。 基于可用编码带宽将编码比特率分配给每个第二服务。 每个第二服务根据其编码比特率进行编码。 第一服务和第二服务的一个或多个服务被转码并形成多路复用。 由于使用第一服务的所需带宽的度量来确定第二服务的可用编码带宽，所以第二服务的代码转换被最小化，并且视频质量被最大化。

    Wideband-narrowband telecommunication
    3.
    发明授权
    Wideband-narrowband telecommunication 有权
    宽带窄带电信

    公开(公告)号：US07813378B2

    公开(公告)日：2010-10-12

    申请号：US11483522

    申请日：2006-07-11

    申请人： Raymond Gass

    发明人： Raymond Gass

    IPC分类号： H04J3/24 ,  H04J3/00 ,  G10L19/00

    CPC分类号： H04J3/22 ,  H04J3/1688 ,  H04Q11/04 ,  H04Q2213/13031 ,  H04Q2213/13034 ,  H04Q2213/1305 ,  H04Q2213/13167 ,  H04Q2213/13204 ,  H04Q2213/13216 ,  H04Q2213/1324

    摘要： Here is described a method, a near end telecommunications terminal and a computer executable software code which allow to perform a telecommunications with a far end telecommunications terminal providing the option of applying a narrowband encoding technique without loosing the benefit of a wideband encoding technique. This is achieved after setting up a telecommunications between that near end telecommunications terminal and the far end telecommunications terminal by applying by the codec from the near end telecommunications terminal a sampling when encoding corresponding to a wideband encoding technique while assembling the resulting timeslots into frames to be transmitted to the far end telecommunications terminal via RTP. Furthermore, the sampled timeslots are assembled when applying the wideband encoding technique according to the parity of the sequential integer number from the sampled timeslots to generate two kind of frames, one with all the timeslots identified by even sequential numbers, the other one with the remaining timeslots identified by odd sequential numbers.

    摘要翻译： 这里描述了允许与远端电信终端执行电信的方法，近端电信终端和计算机可执行软件代码，其提供应用窄带编码技术的选项，而不会失去宽带编码技术的益处。 这是通过在近端电信终端和远端电信终端之间建立电信之间实现的，通过在来自近端电信终端的编解码器中应用与对应于宽带编码技术的编码时的采样，同时将所得到的时隙组合成帧 通过RTP传输到远端电信终端。 此外，当从采样时隙根据顺序整数的奇偶校验应用宽带编码技术时，采样时隙被组合，以产生两种帧，一个具有由偶数序列号识别的所有时隙，另一个具有剩余的 由奇数序号确定的时隙。

    Method and apparatus for frame-based buffer control in a communication system
    4.
    发明授权
    Method and apparatus for frame-based buffer control in a communication system 有权
    通信系统中用于基于帧的缓冲器控制的方法和装置

    公开(公告)号：US07460629B2

    公开(公告)日：2008-12-02

    申请号：US09895926

    申请日：2001-06-29

    申请人： Christof Faller ,  Raziel Haimi-Cohen

    发明人： Christof Faller ,  Raziel Haimi-Cohen

    IPC分类号： H04L7/00

    CPC分类号： G10L19/167 ,  H04H60/27 ,  H04H2201/20 ,  H04J3/0632 ,  H04J3/1688 ,  H04N19/152

    摘要： 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).

    摘要翻译： 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）。

    Adjustment of clock approximations
    5.
    发明申请
    Adjustment of clock approximations 有权
    调整时钟近似

    公开(公告)号：US20080270800A1

    公开(公告)日：2008-10-30

    申请号：US11789156

    申请日：2007-04-24

    申请人： Hans-Martin Krober ,  James A. Baldwin ,  David L. de Heer

    发明人： Hans-Martin Krober ,  James A. Baldwin ,  David L. de Heer

    IPC分类号： H04L9/00

    CPC分类号： H04J3/1688 ,  H04N21/242 ,  H04N21/4305

    摘要： Techniques to adjust clock approximations are described, which may be used to synchronize content output at a client. In an implementation, timestamps derived from a universal time source are allocated to respective program clock reference (PCR) timestamps in content received by a network operator during an interval of time to form ordered pairs of timestamps. An approximation is computed of a plurality of the ordered pairs of timestamps for the interval and the approximation is adjusted using an ordered pair of timestamps taken from a previous approximation.

    摘要翻译： 描述了调整时钟近似的技术，可用于同步客户端的内容输出。 在实现中，从通用时间源导出的时间戳被分配给网络运营商在时间间隔期间接收的内容中的相应节目时钟参考（PCR）时间戳，以形成时间戳的有序对。 对间隔的多个有序对的时间戳计算近似值，并且使用从先前近似获得的有序对时间戳来调整近似值。

    Signal transmitter and signal receiver
    6.
    发明授权
    Signal transmitter and signal receiver 有权
    信号发射机和信号接收机

    公开(公告)号：US07339959B2

    公开(公告)日：2008-03-04

    申请号：US10149309

    申请日：2001-10-12

    申请人： Yutaka Nio ,  Hidekazu Suzuki ,  Toshiro Nishio

    发明人： Yutaka Nio ,  Hidekazu Suzuki ,  Toshiro Nishio

    IPC分类号： H04J3/04

    CPC分类号： H04N21/235 ,  G09G5/006 ,  H04J3/1688 ,  H04N7/083 ,  H04N21/23614 ,  H04N21/2368 ,  H04N21/242 ,  H04N21/4307 ,  H04N21/4341 ,  H04N21/4348 ,  H04N21/435 ,  H04N21/8458

    摘要： A signal transmitter and a signal receiver comprises a time base compression part (101) for compressing an audio signal on a time base to output the compressed signal as a time base compressed audio signal and a multiplexing part (102) for multiplexing a video signal, a control signal, and the time base compressed audio signal to output the multiplexed signal to the external as a video/audio control multiplexed signal. The thus constituted signal transmitter and the signal receiver realize a signal transmission system for multiplexing and transmitting the video signal, audio signal, and control signal, for consequently transmitting high-quality diverse digital audio signals without conversion into an analog signal, and for transmission at high speed with minimal error.

    摘要翻译： 信号发送器和信号接收器包括：时基压缩部件（101），用于按时间压缩音频信号，以输出压缩信号作为时基压缩音频信号;以及复用部分（102），用于复用视频信号， 控制信号和时基压缩音频信号，以将多路复用信号作为视频/音频控制复用信号输出到外部。 由此构成的信号发送器和信号接收器实现用于复用和发送视频信号，音频信号和控制信号的信号传输系统，从而在不转换成模拟信号的情况下传输高质量的多种数字音频信号，并用于传输 高速度，最小误差。