公开(公告)号：US06882969B2

公开(公告)日：2005-04-19

申请号：US09827915

申请日：2001-04-09

申请人： Wataru Fushimi ,  Shigeaki Suzuki

发明人： Wataru Fushimi ,  Shigeaki Suzuki

IPC分类号： H04M3/42 ,  G10L19/14 ,  H04B14/00 ,  H04J3/16 ,  H04J3/22 ,  H04L12/56 ,  H04L29/08 ,  H04M3/00 ,  G10L19/00

CPC分类号： G10L19/16 ,  H04J3/1688 ,  H04L2012/5671

摘要： Digital circuit multiplication equipment (DCME) refers to coding bit rate information included in a pseudo-speech signal. In accordance with the coding bit rate information, the DCME selects either a coded speech signal extracted by a transmission bit rate restorer or a coded speech signal including bit rate identification information added by a coding bit rate information adding section, and supplies the selected coded speech signal to a bearer line. The DCME can solve a problem of a conventional DCME in that a mismatch can take place between the actual transmission bit rate of the coded speech signal and the transmission bit rate assigned to the bearer line when providing the variable bit rate DCME with a tandem passthrough function, and therefore the correct coding bit rate information cannot be transferred to a speech decoder, bringing about serious degradation in the speech quality.

摘要翻译： 数字电路倍增设备（DCME）是指包含在伪语音信号中的编码比特率信息。 根据编码比特率信息，DCME选择由传输比特率恢复器提取的编码语音信号或包括由编码比特率信息添加部分添加的比特率识别信息的编码语音信号，并提供所选择的编码语音 信号到承载线。 DCME可以解决常规DCME的问题，因为当将可变比特率DCME提供串行直通函数时，在编码语音信号的实际传输比特率和分配给载体线路的传输比特率之间可能发生不匹配 因此，正确的编码比特率信息不能传送到语音解码器，导致语音质量的严重降级。

公开(公告)号：US06711182B1

公开(公告)日：2004-03-23

申请号：US09214285

申请日：1999-04-26

申请人： Jonathan A. Gibbs ,  Timor Kadir

发明人： Jonathan A. Gibbs ,  Timor Kadir

IPC分类号： H04J302

CPC分类号： H04L1/0086 ,  H04B7/2612 ,  H04J3/1688 ,  H04J3/22 ,  H04L1/0009 ,  H04L1/0068 ,  H04L1/0072

摘要： The invention encompasses a method of preparing data for transmission, which method comprises: multiplexing data from a plurality of sources (S1, . . . Si, . . . Sn), the multiplexing comprising, for at least one source (Si), classifying the data from the source (Si) into two or more classes (C1,f.Cj, . . . Cm) according to the data's priority, and mapping data from the sources into positions in a data structure (D) according both to the class (Cj) of the data and to a further priority assigned to the source (Si) from which the data originated, the division of data into classes (C1, . . . Cj, . . . Cm) and/or the prioritization of the sources (S1, . . . Si, . . . Sn) being done according to the potential impact of transmission errors on the data; and sub-dividing the data in the data structure (D) into frames while preserving the relative prioritization of the data. The sources may be various multi-media sources. Also disclosed are a method of forward error correction (FEC) encoding the multiplexed data for transmission while maintaining the data's relative prioritization, and a method for decoding and de-multiplexing data. Apparatus for implementing these methods is also disclosed.

摘要翻译： 本发明包括一种准备用于传输的数据的方法，该方法包括：复用来自多个源（S1，...，...，Sn）的数据，所述多路复用包括至少一个源（Si），分类 根据数据的优先级，从源（Si）到数据类型（C1，f.Cj，...，Cm）的数据，以及根据数据的优先级将来自源的数据映射到数据结构（D）中的位置 （Cj）和分配给数据源的源（Si）的另一优先级，将数据划分为类（C1，...，Cj，...，Cm）和/或优先级 根据传输错误对数据的潜在影响，完成源（S1，...，Si ... Sn） 并将数据结构（D）中的数据划分成帧，同时保留数据的相对优先级。 来源可以是各种多媒体源。 还公开了一种在保持数据的相对优先级的同时对用于传输的复用数据进行编码的前向纠错（FEC）的方法，以及用于解码和解复用数据的方法。 还公开了用于实现这些方法的装置。

公开(公告)号：US20030152105A1

公开(公告)日：2003-08-14

申请号：US10272463

申请日：2002-10-15

申请人： Multi-Tech Systems, Inc.

发明人： Harinarayana Arimilli

IPC分类号： H04J003/16 ,  H04J003/22

CPC分类号： H04N1/00281 ,  H04J3/1688 ,  H04J3/247 ,  H04L29/06 ,  H04L2012/6427 ,  H04L2012/6459 ,  H04L2012/6462 ,  H04L2012/6464 ,  H04L2012/6486 ,  H04L2012/6494 ,  H04M1/253 ,  H04M11/064 ,  H04N1/00302 ,  H04N1/00312 ,  Y10S370/916

摘要： A data multiplexing network is described which multiplexes a plurality of asynchronous data channels with an asynchronous data stream representing compressed voice signals and/or facsimile signals onto a single synchronous data packet stream. The single synchronous data packet stream is then transmitted by a high speed statistical multiplexer over a composite link to a second site using a modified high-level synchronous data link control protocol with an overlay of an advanced priority statistical multiplexing algorithm. The asynchronous data channels and the compressed voice channel and/or facsimile signals are demultiplexed and reconstructed for sending to other asynchronous computer terminals and to a standard telephone or facsimile analog port at the second site, respectively. PBX trunk interfaces are also provided to allow PBX's to share the composite link between sites. Communication between the first site by voice or facsimile and the second site is transparent to the users. The multiplexer efficiently allocated the bandwidth of the composite link by detecting silence periods in the voice signals and suppressing the sending of the voice information to preserve bandwidth. An advanced priority statistical multiplexer is also described which dynamically allocates composite link bandwidth to both time-sensitive and non-time-sensitive data to maximize data throughout efficiency and quality while simultaneously reducing multiplexer processing overhead

摘要翻译： 描述了一种数据复用网络，其将多个异步数据信道与表示压缩语音信号和/或传真信号的异步数据流复用到单个同步数据分组流上。 然后，使用具有高级优先级统计复用算法的覆盖的经修改的高级同步数据链路控制协议，单个同步数据分组流由高速统计多路复用器通过复合链路发送到第二站点。 异步数据信道和压缩语音信道和/或传真信号被解复用和重构，以分别发送到第二站点的其他异步计算机终端和标准电话或传真模拟端口。 还提供PBX中继接口，以便PBX共享站点之间的复合链路。 第一站点之间通过语音或传真与第二站点之间的通信对于用户来说是透明的。 复用器通过检测语音信号中的静音时段，有效地分配复合链路的带宽，抑制语音信息的发送以保持带宽。 还描述了一种高级优先级统计多路复用器，其将复合链路带宽动态地分配给时间敏感和非时间敏感数据，以在效率和质量上最大化数据，同时降低多路复用器处理开销

公开(公告)号：US20030053519A1

公开(公告)日：2003-03-20

申请号：US10263898

申请日：2002-10-02

发明人： Klein S. Gilhousen ,  Irwin M. Jacobs ,  Roberto Padovani ,  Lindsay A. Weaver JR. ,  Charles E. Wheatley III ,  Andrew J. Viterbi

IPC分类号： H04B001/707

CPC分类号： H04L1/0002 ,  H04B1/707 ,  H04B1/70757 ,  H04B1/7115 ,  H04B7/2618 ,  H04B7/2628 ,  H04B7/2637 ,  H04B2201/70701 ,  H04B2201/70703 ,  H04J3/02 ,  H04J3/1688 ,  H04J3/22 ,  H04J13/0022 ,  H04J13/0048 ,  H04J13/12 ,  H04L1/0071 ,  H04L1/0072 ,  H04L1/06 ,  H04L1/08 ,  H04L5/02 ,  H04L5/12 ,  H04L23/02 ,  H04W52/08 ,  H04W52/10 ,  H04W52/26

摘要： A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better link performance. With orthogonal PN codes, the cross-correlation is zero over a predetermined time interval, resulting in no interference between the orthogonal codes, provided only that the code time frames are time aligned with each other. In an exemplary embodiment, signals are communicated between a cell-site and mobile units using direct sequence spread spectrum communication signals. In the cell-to-mobile link, pilot, sync, paging and voice channels are defined. Information communicated on the cell-to-mobile link channels are, in general, encoded, interleaved, bi-phase shift key (BPSK) modulated with orthogonal covering of each BPSK symbol along with quadrature phase shift key (QPSK) spreading of the covered symbols. In the mobile-to-cell link, access and voice channels are defined. Information communicated on the mobile-to-cell link channels are, in general, encoded, interleaved, orthogonal signaling along with QPSK spreading.

摘要翻译： 一种使用扩频通信技术传送信息信号的系统和方法。 构造PN序列，以提供用户之间的正交性，从而减少相互干扰，从而允许更高的容量和更好的链路性能。 对于正交PN码，在相关的时间间隔内，互相关为0，导致正交码之间没有干扰，只要码时间帧彼此时间对准。 在示例性实施例中，使用直接序列扩频通信信号在小区站点和移动单元之间传送信号。 在小区到移动链路中，定义了导频，同步，寻呼和语音信道。 在小区到移动链路信道上传送的信息通常是用每个BPSK符号的正交覆盖调制的编码，交织，双相移键（BPSK）以及覆盖符号的正交相移键（QPSK）扩展 。 在移动小区链路中，定义了接入和语音信道。 一般来说，在移动小区链路信道上传送的信息一起编码，交织，正交信令以及QPSK扩频。

公开(公告)号：US06515984B1

公开(公告)日：2003-02-04

申请号：US09711754

申请日：2000-11-13

申请人： Harinarayana Arimilli ,  Ashish A. Thanawala ,  Vasant Kumar Kanchan

发明人： Harinarayana Arimilli ,  Ashish A. Thanawala ,  Vasant Kumar Kanchan

IPC分类号： H04L1266

CPC分类号： H04N1/00302 ,  H04J3/1688 ,  H04J3/247 ,  H04L29/06 ,  H04L2012/6427 ,  H04L2012/6459 ,  H04L2012/6462 ,  H04L2012/6464 ,  H04L2012/6486 ,  H04L2012/6494 ,  H04M1/253 ,  H04M11/064 ,  H04N1/00281 ,  H04N1/00312

摘要： A data multiplexing network is described which multiplexes a plurality of asynchronous data channels with an asynchronous data stream representing compressed voice signals and/or facsimile signals onto a single synchronous data packet stream. The single synchronous data packet stream is then transmitted by a high speed statistical multiplexer over a composite link to a second site using a modified high-level synchronous data link control protocol with an overlay of a priority statistical multiplexing algorithm. The asynchronous data channels and the compressed voice channel and/or facsimile signals are demultiplexed and reconstructed for sending to other asynchronous computer terminals and to a standard telephone or facsimile analog port at the second site, respectively. PBX trunk interfaces are also provided to allow PBX's to share the composite link between sites. Communication between the first site by voice or facsimile and the second site is transparent to the users. The multiplexer efficiently allocated the bandwidth of the composite link by detecting silence periods in the voice signals and suppressing the sending of the voice information to preserve bandwidth. The transmission of facsimile information is performed by decoding the fax transmissions, sending only the facsimile image packets over the multiplexed composite link and reassembling, with carrier, the facsimile signals at the remote site for transmission over an analog telephone line to a remote facsimile machine.

摘要翻译： 描述了一种数据复用网络，其将多个异步数据信道与表示压缩语音信号和/或传真信号的异步数据流复用到单个同步数据分组流上。 然后，使用具有优先级统计复用算法的覆盖的修改的高级同步数据链路控制协议，单个同步数据分组流由高速统计多路复用器通过复合链路发送到第二站点。 异步数据信道和压缩语音信道和/或传真信号被解复用和重构，以分别发送到第二站点的其他异步计算机终端和标准电话或传真模拟端口。 还提供PBX中继接口，以便PBX共享站点之间的复合链路。 第一站点之间通过语音或传真与第二站点之间的通信对于用户来说是透明的。 多路复用器通过检测语音信号中的静音时段，有效地分配复合链路的带宽，并抑制语音信息的发送以保持带宽。传真信息的传输是通过对传真传输进行解码来执行的，只传送传真图像分组 复用复合链路，并与载波重新组装远程站点的传真信号，以通过模拟电话线传输到远程传真机。

公开(公告)号：US20020154694A1

公开(公告)日：2002-10-24

申请号：US08927481

申请日：1997-09-11

发明人： CHRISTOPHER H. BIRCH

IPC分类号： H04N007/12

CPC分类号： H04N21/23424 ,  H04B7/2612 ,  H04J3/1682 ,  H04J3/1688 ,  H04J3/247 ,  H04N21/2187 ,  H04N21/23608 ,  H04N21/23614 ,  H04N21/2362 ,  H04N21/23655 ,  H04N21/2385 ,  H04N21/2389 ,  H04N21/23895 ,  H04N21/2401 ,  H04N21/242 ,  H04N21/4305 ,  H04N21/4307 ,  H04N21/6125 ,  H04N21/64307

摘要： A splicer for splicing nulllivenull bit streams such as those which carry video programs that have been encoded according to the MPEG-2 standard. The splicer controls the rate at which it outputs the spliced bit stream by means of a model of the receiver and can thereby prevent overflow or underflow in receivers receiving the spliced bit stream. The splicer also includes analyzers for reading the old bit stream and the new bit stream that is to be spliced to the new bit stream. The analyzers provide information to the receiver model and also permit the splicer to select IN and OUT points in the old and new bit streams that minimize the effect of the splice on the decoding of the bit stream done in the receiver. Where necessary, the splicer modifies the output bit stream to reduce interference with decoding. The splicer does not require splice parameters to select IN and OUT points or to determine the proper bit rate or the spliced bit stream. The splicer is further able to make non-seamless and seamless splices and greatly simplifies the making of undetectable splices. It is also able to splice in response to an external splice signal, to a splice command in a bit stream, or to the presence of the beginning or end of a bit stream in the splicer.

摘要翻译： 用于拼接“实时”比特流的拼接器，例如携带根据MPEG-2标准编码的视频节目的那些流。 拼接器通过接收机的模型来控制其输出拼接比特流的速率，从而可以防止接收接收的比特流的接收机中的上溢或下溢。 拼接器还包括用于读取旧比特流的分析器和要被拼接到新比特流的新比特流。 分析器向接收机模型提供信息，并且还允许拼接器选择旧和新的比特流中的IN和OUT点，以使拼接对接收机中完成的比特流的解码的影响最小化。 必要时，拼接器修改输出位流以减少对解码的干扰。 拼接器不需要拼接参数来选择IN和OUT点，或者确定适当的比特率或拼接比特流。 拼接器进一步能够制造无缝和无缝的拼接，并大大简化了不可检测的拼接的制作。 它还能够响应于外部拼接信号，比特流中的拼接命令或者拼接器中位流的开始或结束的存在而进行拼接。

公开(公告)号：US20020075857A1

公开(公告)日：2002-06-20

申请号：US10077405

申请日：2002-02-15

发明人： Wilfrid LeBlanc

IPC分类号： H04L012/66

CPC分类号： H04L65/1026 ,  H04B3/04 ,  H04B3/23 ,  H04J3/0632 ,  H04J3/1688 ,  H04J3/22 ,  H04L12/2801 ,  H04L12/66 ,  H04L29/06027 ,  H04L47/10 ,  H04L47/11 ,  H04L47/263 ,  H04L47/28 ,  H04L49/90 ,  H04L65/1036 ,  H04L65/607 ,  H04L65/80 ,  H04L67/322 ,  H04L69/329 ,  H04L2001/0093 ,  H04L2012/5671 ,  H04M3/002 ,  H04M3/22 ,  H04M3/2209 ,  H04M3/2272 ,  H04M7/006 ,  H04M7/0069 ,  H04M7/0072 ,  H04M2201/40 ,  H04M2203/2027 ,  H04M2203/2066 ,  H04Q1/45 ,  Y02D50/10

摘要： Method of processing a transmitted digital media data stream. A subsequent data element that follows an unreceived data element in the data stream is received. A parameter of the unreceived data element is estimated based on the received subsequent data element. In one embodiment, each received data element is held in a buffer until a prescribed playout deadline, at which time the data element is released for playout. A loss rate at which data elements in the data stream are not received by their respective playout deadlines is monitored. A time interval extending from the time a data element is sent by a transmitting end to the playout deadline is adjusted based upon the loss rate.

摘要翻译： 处理传输的数字媒体数据流的方法。 接收在数据流中未接收的数据元素之后的后续数据元素。 基于所接收的后续数据元素来估计未接收数据元素的参数。 在一个实施例中，每个接收到的数据元素被保持在缓冲器中，直到规定的播放截止时间为止，此时数据元素被释放以进行播放。 监视数据流中的数据元素在其各自的播放截止期间未被接收到的丢失率。 基于丢失率调整从发送端发送数据元素到播放截止时间的时间间隔。

公开(公告)号：US6128317A

公开(公告)日：2000-10-03

申请号：US996165

申请日：1997-12-22

申请人： Francois Mackre

发明人： Francois Mackre

IPC分类号： H04J3/06 ,  H04J3/16 ,  H04L7/04 ,  H04L25/45 ,  H04J13/00

CPC分类号： H04J3/1688 ,  H04L25/45 ,  H04J3/0638

摘要： A synchronous serial protocol is used to transfer data from a host processor (102) to multiple CODECs (112) operating at differing speeds and from such CODECs (112) back to the host processor (102) across a bidirectional pair of serial links (134, 136). A link speed fast enough to accommodate all operating CODECs (112) is utilized. Frames are transmitted across the bidirectional pair of serial links (134, 136) controlled by frame sync (132) and bit clock (130) signals. Each frame has a control word of validity bits followed by one data word for each active CODEC (112). The validity bits determine whether the corresponding data word contains valid data for or from the corresponding CODEC (112).

摘要翻译： 使用同步串行协议将数据从主机处理器（102）传送到以不同速度工作的多个CODEC（112），并且通过双向串行链路（134）从这些编解码器（112）传回主机处理器（102） ，136）。 利用足够快以适应所有操作CODEC（112）的链路速度。 帧通过由帧同步（132）和位时钟（130）信号控制的双向串行链路（134,136）传输。 每个帧具有有效位的控制字，随后是每个活动CODEC（112）的一个数据字。 有效位确定对应的数据字是否包含对应的CODEC的有效数据（112）。

公开(公告)号：US5838686A

公开(公告)日：1998-11-17

申请号：US722165

申请日：1996-10-11

申请人： Mehmet Kemal Ozkan

发明人： Mehmet Kemal Ozkan

IPC分类号： H04J3/16 ,  H04N7/50 ,  H04N7/58 ,  H04J3/17

CPC分类号： H04N21/23655 ,  H04J3/1688

摘要： A system for dynamically allocating a resource is disclosed which includes a plurality of resource users and a resource having a maximum utilization level sharable among the plurality of resource users. A plurality of need analyzers, associated with respective resource users, dynamically generate respective signals (COMPLEXITY), each representing the relative need for the resource by the associated resource user. A plurality of access controllers, associated with respective resource users, control access to the resource by the associated user in response to an allocation signal (CONTROL). A resource allocator dynamically generates allocation signals (CONTROL), representing allocated resource utilization levels for associated users, in response to the plurality of need representative signals (COMPLEXITY) from the need analyzers.

摘要翻译： PCT No.PCT / US94 / 04421 Sec。 371日期：1996年10月11日 102（e）日期1996年10月11日PCT 1994年4月22日PCT PCT。 公开号WO95 / 29546 日期：1995年11月2日公开了一种用于动态分配资源的系统，其包括多个资源用户和具有在多个资源用户之间可共享的最大利用水平的资源。 与各个资源用户相关联的多个需求分析器动态地产生相应的信号（COMPLEXITY），每个信号表示相关资源用户对资源的相对需求。 与相应的资源用户相关联的多个访问控制器响应于分配信号（CONTROL）控制相关用户对资源的访问。 响应于来自需求分析器的多个需要代表信号（COMPLEXITY），资源分配器动态地生成分配信号（CONTROL），表示相关用户的分配的资源利用水平。

公开(公告)号：US5793425A

公开(公告)日：1998-08-11

申请号：US713311

申请日：1996-09-13

申请人： Mahesh Balakrishnan

发明人： Mahesh Balakrishnan

IPC分类号： H04N7/26 ,  H04J3/00 ,  H04J3/04 ,  H04J3/16 ,  H04N7/08 ,  H04N7/081 ,  H04N7/50 ,  H04N21/2365 ,  H04N21/434

CPC分类号： H04N21/2365 ,  H04J3/1688 ,  H04N19/115 ,  H04N19/14 ,  H04N19/149 ,  H04N19/154 ,  H04N19/159 ,  H04N19/172 ,  H04N19/61 ,  H04N21/23406 ,  H04N21/23655 ,  H04N21/2401 ,  H04N19/146

摘要： A method and apparatus for dynamically allocating the available bandwidth of a common transmission channel of a multiplexed system among multiple encoders in such a manner as to maximize and equalize the quality of the encoded data output by all of the encoders, while also preventing underflow or overflow of encoder or decoder buffers at each end of the common transmission channel, and moreover, while also ensuring compliance with (i.e., without violating) the data encoding and transmission protocol utilized by the system. Further, the bandwidth of the common transmission channel is preferably allocated using an algorithm that does not impose any constraints on the size of the encoder or decoder buffers, other than any constraints specified by the data transmission protocol employed in transmitting the encoded data over the common transmission channel. In a presently preferred embodiment, in which video signals from multiple sources are encoded, both the output channel rate ("bit rate") of each of the encoders and the target number of bits for each picture that is encoded by each encoder are controlled by a controller in accordance with a control algorithm which ensures that the quality of the encoded pictures output by all of the encoders is equalized and maximized, that no underflow or overflow of the encoder or decoder buffers occurs, and that the data encoding and transmission protocol utilized by the system is not violated. Further, the control algorithm employed by the controller preferably does not impose any constraints on the sizes or relative sizes of the encoder or decoder buffers. Moreover, the control algorithm employed by the controller preferably maintains all of the encoder buffers as empty as possible in order to provide increased flexibility to the rate allocation procedure.

摘要翻译： 一种用于在多个编码器之间动态地分配复用系统的公共传输信道的可用带宽的方法和装置，以便最大化和均衡所有编码器输出的编码数据的质量，同时还防止下溢或溢出 的编码器或解码器缓冲器在公共传输信道的每一端，而且还确保符合（即，不违反）系统使用的数据编码和传输协议。 此外，公共传输信道的带宽优选地使用不对编码器或解码器缓冲器的大小施加任何约束的算法来分配，除了在通过公共传输方式发送编码数据时使用的数据传输协议所指定的任何约束 传输通道。 在其中编码来自多个源的视频信号的当前优选实施例中，每个编码器的输出信道速率（“比特率”）和由每个编码器编码的每个图像的目标比特数都由 根据控制算法的控制器，其确保由所有编码器输出的编码图像的质量均衡和最大化，不会发生编码器或解码器缓冲器的下溢或溢出，并且使用数据编码和传输协议 由系统没有违反。 此外，控制器采用的控制算法优选地不对编码器或解码器缓冲器的尺寸或相对尺寸施加任何约束。 此外，控制器采用的控制算法优选地将所有的编码器缓冲器保持为空，以便为速率分配过程提供增加的灵活性。