公开(公告)号：US07111091B2

公开(公告)日：2006-09-19

申请号：US10451220

申请日：2000-12-21

申请人： Ari Lakaniemi ,  Vilho Räisänen

发明人： Ari Lakaniemi ,  Vilho Räisänen

IPC分类号： G06F3/00 ,  G06F15/16

CPC分类号： H04L49/90 ,  H04L47/10 ,  H04L47/25 ,  H04L47/30 ,  H04L47/32 ,  H04L49/50

摘要： The present invention proposes a device for controlling a stream of data packets, comprising: a buffer (2) adapted to receive a data packet stream from a data source (1) and to output said packet data stream with an output rate to a packet data communication network (7), a monitoring means (4) adapted to monitor a fill level of said buffer (2), a detection means (5) adapted to detect a fill level condition of said buffer (2), in which an incoming data packet has to be dropped, and adapted to control a dropping means (6) for dropping an incoming data packet upon detection of said fill level condition, and further comprising an output rate control means (5a, 8, 9, 10, 11) adapted to control an output rate adjusting means (3) which is adapted to adjust said output rate of said buffer (2), wherein said output rate control means, in response to said fill level condition detected by said detection means (5), issues a first control signal (5a) controlling said adjusting means (3) to increase a current output rate of said buffer to a predefined output rate, and said output rate control means, in response to each non-dropped data packet received after said detection by said detection means (2), issues a second control signal (11a) controlling said adjusting means (3) to decrease a currently adjusted output rate. The present invention also proposes a corresponding control method.

摘要翻译： 本发明提出了一种用于控制数据分组流的设备，包括：缓冲器（2），适于从数据源（1）接收数据分组流，并将所述分组数据流以输出速率输出到分组数据 通信网络（7），适于监视所述缓冲器（2）的填充级别的监视装置（4），适于检测所述缓冲器（2）的填充级别状况的检测装置（5），其中输入数据 分组必须丢弃，并且适于控制在检测到所述填充水平状况时丢弃输入数据分组的丢弃装置（6），并且还包括输出速率控制装置（5 a，8,9,10,11） 适于控制适于调节所述缓冲器（2）的所述输出速率的输出速率调节装置（3），其中所述输出速率控制装置响应于由所述检测装置（5）检测到的所述填充电平状况，发出 控制所述佐剂的第一控制信号（5a） 刺激装置（3）将所述缓冲器的当前输出速率增加到预定义的输出速率，并且所述输出速率控制装置响应于所述检测装置（2）在所述检测之后接收到的每个未丢弃的数据包，发出一个 第二控制信号（11a）控制所述调节装置（3）以减小当前调节的输出速率。 本发明还提出了相应的控制方法。

公开(公告)号：US08069034B2

公开(公告)日：2011-11-29

申请号：US11126380

申请日：2005-05-06

申请人： Jari Mäkinen ,  Ari Lakaniemi ,  Pasi Ojala

发明人： Jari Mäkinen ,  Ari Lakaniemi ,  Pasi Ojala

IPC分类号： G10L19/00 ,  G10L19/14 ,  G10L11/06 ,  G10L21/04

CPC分类号： G10L19/20

摘要： A method for supporting an encoding of an audio signal is shown, wherein at least a first and a second coder mode are available for encoding a section of the audio signal. The first coder mode enables a coding based on two different coding models. A selection of a coding model is enabled by a selection rule which is based on signal characteristics which have been determined for a certain analysis window. In order to avoid a misclassification of a section after a switch to the first coder mode, it is proposed that the selection rule is activated only when sufficient sections for the analysis window have been received. The invention relates equally to a module in which this method is implemented, to a device and a system comprising such a module and to a software program product including a software code for realizing the proposed method.

摘要翻译： 示出了用于支持音频信号的编码的方法，其中至少第一和第二编码器模式可用于对音频信号的一部分进行编码。 第一编码器模式能够进行基于两种不同编码模型的编码。 编码模型的选择通过基于已经为特定分析窗口确定的信号特性的选择规则来实现。 为了避免在切换到第一编码器模式之后对一个部分进行错误分类，建议仅在接收到用于分析窗口的足够部分时激活选择规则。 本发明同样涉及实现该方法的模块，涉及包括这种模块的装置和系统以及包括用于实现所提出的方法的软件代码的软件程序产品。

公开(公告)号：US20090154495A1

公开(公告)日：2009-06-18

申请号：US12234512

申请日：2008-09-19

申请人： Pasi Ojala ,  Ari Lakaniemi

发明人： Pasi Ojala ,  Ari Lakaniemi

IPC分类号： H04J3/22

CPC分类号： H04L1/0083 ,  H04L1/0061 ,  H04L1/008

摘要： A system and method for providing improved scalable error detection and cross-timing synchronization for packet-switched transmission. In one embodiment, checksum error detection is applied for the core layer and for enhancement layers of the scalable payload in such a way that dropping one or several enhancement layers from the payload does not change the value of the checksum. Only one checksum is transmitted, e.g., in the payload or in the header of the lower-layer protocol. The transmitter modifies the encoded bit stream in such a manner that the entity in the network deploying the scalable payload and removing layers from the packet does not need to recalculate the checksum placed in the payload or packet header, even when the payload size is changed. A prefix/tail bit field is added in the beginning/end of each enhancement layer to make the checksum check match with the common checksum. In another embodiment, the receiver may check the correctness of each received layer simultaneously and, if desired, utilize data only from correctly received layers.

摘要翻译： 一种用于为分组交换传输提供改进的可伸缩错误检测和交叉定时同步的系统和方法。 在一个实施例中，以核心层和可扩展有效负载的增强层应用校验和错误检测，使得从有效载荷丢弃一个或几个增强层不会改变校验和的值。 仅传送一个校验和，例如在有效载荷或低层协议的报头中。 发射机以这样的方式修改编码比特流，使得即使当有效载荷大小改变时，部署可扩展有效载荷并从分组移除层的实体也不需要重新计算放置在有效载荷或分组报头中的校验和。 在每个增强层的开始/结束处添加前缀/尾部位字段，以使校验和校验与公共校验和匹配。 在另一实施例中，接收机可以同时检查每个接收层的正确性，并且如果需要，仅利用来自正确接收的层的数据。

公开(公告)号：US20090063165A1

公开(公告)日：2009-03-05

申请号：US12199735

申请日：2008-08-27

申请人： Pasi Ojala ,  Ari Lakaniemi

发明人： Pasi Ojala ,  Ari Lakaniemi

IPC分类号： G10L21/00

CPC分类号： G10L19/012 ,  G10L19/005

摘要： A system and method for providing improved adaptive multi-rate wideband (AMR-WB) discontinuous transmission (DTX) synchronization. According to various embodiments, an indication on the start of the inactive speech period is signalled to the decoder via a voice activity detection (VAD) flag a predetermined number of frames before the DTX period will start, i.e., before the SID_FIRST frame is received. When the VAD flag indicates active speech, or when the VAD flag has been set to zero less than the predetermined number of frames ago, the received NO_DATA frame can be classified with a high degree of reliability as active speech, i.e., considered as transmitter, network or terminal-initiated signalling, and can be substituted by a SPEECH_LOST frame. When the VAD flag was set to zero eight frames ago or earlier, the NO_DATA frame is classified as DTX.

摘要翻译： 一种用于提供改进的自适应多速率宽带（AMR-WB）不连续传输（DTX）同步的系统和方法。 根据各种实施例，在DTX周期开始之前，即在接收到SID_FIRST帧之前，通过语音活动检测（VAD）标志将预定数量的帧在无效语音周期开始时的指示信号通知解码器。 当VAD标志指示有效语音时，或者当VAD标志已被设置为小于预定数目的帧前的零时，接收到的NO_DATA帧可以以高可靠性分类为活动语音，即被认为是发射机， 网络或终端发起的信令，并且可以被SPEECH_LOST帧替代。 当VAD标志在八帧前或更早版本设置为零时，NO_DATA帧被分类为DTX。

公开(公告)号：US20080092019A1

公开(公告)日：2008-04-17

申请号：US11528488

申请日：2006-09-26

申请人： Ari Lakaniemi ,  Pasi S. Ojala

发明人： Ari Lakaniemi ,  Pasi S. Ojala

IPC分类号： H03M13/00

CPC分类号： H04L47/10 ,  H04L49/90

摘要： For supporting a decoding of encoded frames, which belong to a sequence of frames received via a packet switched network, it is detected whether a particular encoded frame has been received after a scheduled decoding time for the particular encoded frame and before a scheduled decoding time for a next encoded frame. In case the particular encoded frame is detected to have been received after its scheduled decoding time and before the scheduled decoding time for the next encoded frame, the particular encoded frame is re-scheduled to be decoded at the scheduled decoding time for the next encoded frame.

摘要翻译： 为了支持经由分组交换网络接收的属于一系列帧的已编码帧的解码，检测在针对特定编码帧的调度解码时间之后是否已经接收到特定编码帧，并且在调度解码时间之前 下一个编码帧。 在检测到特定编码帧在其调度的解码时间之后并且在针对下一编码帧的调度解码时间之前被接收到的特定编码帧的情况下，特定编码帧被重新调度为在下一编码帧的调度解码时间被解码 。

公开(公告)号：US20070186145A1

公开(公告)日：2007-08-09

申请号：US11349745

申请日：2006-02-07

申请人： Pasi Ojala ,  Ari Lakaniemi

发明人： Pasi Ojala ,  Ari Lakaniemi

IPC分类号： G06F17/00

CPC分类号： G10L21/04 ,  H04J3/0632

摘要： For controlling a time-scaling of an audio signal, the audio signal being distributed to a sequence of frames that are received via a packet switched network, a change in a delay of received frames is detected. Moreover, an amount of time scaling that is to be applied to received frames for compensating for the detected change is determined. Further, a kind of the change is determined. Further, a length of a time window within which a time scaling of the determined amount is to be completed is determined depending on the determined kind of the change.

摘要翻译： 为了控制音频信号的时间缩放，音频信号被分配到经由分组交换网络接收到的帧序列，检测到接收帧的延迟的改变。 此外，确定要应用于接收到的帧以补偿检测到的变化的时间缩放量。 此外，确定了一种变化。 此外，根据确定的改变的种类来确定要在其中完成所确定的量的时间缩放的时间窗口的长度。

公开(公告)号：US20050246164A1

公开(公告)日：2005-11-03

申请号：US11107334

申请日：2005-04-15

申请人： Pasi Ojala ,  Jari Makinen ,  Ari Lakaniemi

发明人： Pasi Ojala ,  Jari Makinen ,  Ari Lakaniemi

IPC分类号： G10L20060101 ,  G10L19/24 ,  G10L25/18 ,  G10L19/14

CPC分类号： G10L19/24 ,  G10L25/18

摘要： An encoder comprises an input for inputting frames of an audio signal in a frequency band, an analysis filter dividing the frequency band into lower and higher frequency bands, a first encoding block for encoding the audio signals of the lower frequency band, a second encoding block for encoding the audio signals of the higher frequency band, and a mode selector for selecting an operating mode for the encoder among at least a first mode where signals only on the lower frequency band are encoded, and a second mode where signals on both the lower and higher frequency band are encoded. The encoder has a scaler to gradually change the encoding properties of the second encoding block in connection with a change in the operating mode of the encoder. The invention also relates to a device, a decoder, a method, a module, a computer program product, and a signal.

摘要翻译： 编码器包括用于输入频带中的音频信号的帧的输入，将频带划分为较低和较高频带的分析滤波器，用于对较低频带的音频信号进行编码的第一编码块，第二编码块 用于对较高频带的音频信号进行编码的模式选择器，以及用于在至少第一模式中选择编码器的操作模式的模式选择器，其中仅在较低频带上的信号被编码，以及第二模式， 并且对频带进行编码。 编码器具有缩放器，以与编码器的操作模式的改变相结合地逐渐改变第二编码块的编码属性。 本发明还涉及一种设备，解码器，方法，模块，计算机程序产品和信号。

公开(公告)号：US08570869B2

公开(公告)日：2013-10-29

申请号：US12234512

申请日：2008-09-19

申请人： Pasi Ojala ,  Ari Lakaniemi

发明人： Pasi Ojala ,  Ari Lakaniemi

IPC分类号： H04J3/14

CPC分类号： H04L1/0083 ,  H04L1/0061 ,  H04L1/008

摘要： Systems, methods and computer program codes are provided to facilitate error detection and timing synchronization of scalable data transmissions. To this end, checksum error detection is applied to the core layer and enhancement layers of the scalable payload data in such a way that dropping one or several enhancement layers from the payload data does not change the value of the checksum. Only one checksum is transmitted, e.g., in the payload or in the header of the lower-layer protocol. The transmitter modifies the encoded bit stream in such a manner that the entity in the network deploying the scalable payload and removing layers from the packet does not need to recalculate the checksum placed in the payload or packet header, even when the payload size is changed.

摘要翻译： 提供系统，方法和计算机程序代码以便于可伸缩数据传输的错误检测和定时同步。 为此，将校验和错误检测应用于可扩展有效载荷数据的核心层和增强层，使得从有效载荷数据丢弃一个或几个增强层不会改变校验和的值。 仅传送一个校验和，例如在有效载荷或低层协议的报头中。 发射机以这样的方式修改编码比特流，使得即使当有效载荷大小改变时，部署可扩展有效载荷并从分组移除层的实体也不需要重新计算放置在有效载荷或分组报头中的校验和。

公开(公告)号：US08566108B2

公开(公告)日：2013-10-22

申请号：US12746076

申请日：2007-12-03

申请人： Pasi Ojala ,  Ari Lakaniemi

发明人： Pasi Ojala ,  Ari Lakaniemi

IPC分类号： G10L19/00 ,  G10L21/04 ,  H04B1/66

CPC分类号： H04L65/607 ,  G10L19/167 ,  G10L19/24 ,  H04L65/608

摘要： A packet generator for generating packets from an input signal configured to: generate at least one first signal, dependent on the input signal, the first signal comprising a first relative time value; generate at least one second signal, dependent on the input signal and associated with the at least one first signal; and generate at least one indicator associated with each of the at least one second signal, each indicator dependent on the first relative time value.

摘要翻译： 一种分组生成器，用于根据输入信号产生分组，所述分组生成器被配置为：根据所述输入信号生成至少一个第一信号，所述第一信号包括第一相对时间值; 根据输入信号产生至少一个第二信号并与至少一个第一信号相关联; 并且产生与所述至少一个第二信号中的每一个相关联的至少一个指示符，每个指示符取决于所述第一相对时间值。

公开(公告)号：US07573907B2

公开(公告)日：2009-08-11

申请号：US11509330

申请日：2006-08-22

申请人： Ari Lakaniemi

发明人： Ari Lakaniemi

IPC分类号： H04J3/16 ,  H04J3/06

CPC分类号： H04J3/0632

摘要： Packets for a discontinuous transmission of a speech signal via a packet switched network may be provided in shorter transmission intervals during an active state and in longer transmission intervals during an inactive state. The active state may be selected whenever a speech signal comprises a speech burst, optionally with a hangover period after a respective speech burst. For enhancing the control of an adaptive jitter buffer at a receiver at the beginning of a respective transmission session, an active state is enforced in addition for a predetermined period at a beginning of a transmission session, irrespective of a presence of speech bursts. In case hangover periods are used, the length of the predetermined period exceeds the length of these hangover periods.

摘要翻译： 可以在活动状态期间以更短的传输间隔以及在非活动状态期间的更长的传输间隔中提供用于经由分组交换网络的语音信号的不连续传输的分组。 每当语音信号包括语音脉冲串时，可以选择活动状态，任选地在相应语音脉冲串之后具有宿醉周期。 为了增强在相应传输会话开始时在接收机处的自适应抖动缓冲器的控制，在传输会话开始时，除了存在语音突发之外，另外还执行一个预定时段的活动状态。 如果使用宿醉期，则预定期间的长度超过这些宿醉期的长度。