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    • 5. 发明授权
    • Method and apparatus for reducing synchronization delay in packet-based voice terminals
    • US07110416B2
    • 2006-09-19
    • US09946066
    • 2001-09-04
    • Jari Selin
    • Jari Selin
    • H04J3/17
    • H04L12/6418H04J3/0632H04L2012/6481
    • Circuitry, embodied in a media subsystem, reproduces a speech or other type of audio signal, and is operable during a time that comfort noise is being generated for storing data from an arriving data packet that contains data representing a beginning of an interval of speech. The circuitry detects that data representing speech has been stored and synchronizes the circuitry to the beginning of the interval of speech by terminating the generation of comfort noise that precedes the interval of speech, and reproduces the speech by decoding the stored data from the data packet and converting the decoded data to an audio speech signal. The arriving data packet contains at least one frame of speech data having a duration of X milliseconds, and the circuitry includes an audio device, such as a DAC or a PCM connection, that requests decoded speech data at a rate given by X/Y milliseconds, where Y is greater than one. By example, the frame of speech data has a duration in the range of about 20 milliseconds to about 60 milliseconds, and an audio device requests decoded speech data at a rate of less than every 10 milliseconds (e.g., every 5 milliseconds). The circuitry may be contained within a wireless communications device, such as a cellular telephone or a personal communicator.
    • 6. 发明授权
    • Method and apparatus for reducing synchronization delay in packet-based voice terminals by resynchronizing during talk spurts
    • 用于通过在对话突发期间重新同步来减少基于分组的语音终端中的同步延迟的方法和装置
    • US07319703B2
    • 2008-01-15
    • US10189068
    • 2002-07-02
    • Ari LakaniemiJari SelinPasi Ojala
    • Ari LakaniemiJari SelinPasi Ojala
    • H04J3/07
    • H04J3/0632H04L12/6418H04L2012/6481
    • Circuitry, embodied in a media subsystem (10A), reproduces a speech or other type of audio signal, and is operable when playing back audio data for reducing synchronization delay. A method operates by, when a frame containing audio data is sent to a decoder (20), measuring the synchronization delay; determining by how much the synchronization delay should be adjusted; and adjusting the synchronization delay in a content-aware manner by adding or removing one or more audio samples in a selected current frame or in a selected subsequent frame so as not to significantly degrade the quality of the played back audio data. When the synchronization delay is adjusted by more than one audio sample, the adjustment can be made by all of the determined audio samples in one adjustment, or the adjustment is made by less than all of the determined audio samples by a plurality of adjustments. The step of adjusting selects, if possible, an unvoiced frame and discriminates against a transient frame. The step of determining includes measuring an average amount of time that a frame resides in a jitter buffer (18), and adjusting the synchronization delay so that the average duration approaches a desired jitter buffer residency duration.
    • 体现在媒体子系统(10A)中的电路再现语音或其他类型的音频信号,并且当回放用于减少同步延迟的音频数据时可操作。 当将包含音频数据的帧发送到解码器(20)时,测量同步延迟的方法操作; 确定应该调整多少同步延迟; 以及通过在所选择的当前帧或所选择的后续帧中添加或去除一个或多个音频样本,以内容感知方式来调整同步延迟,从而不会显着降低回放音频数据的质量。 当通过多于一个音频样本调整同步延迟时,可以在一个调整中由所有确定的音频样本进行调整,或者通过多个调整小于所有确定的音频样本进行调整。 如果可能的话,调整步骤选择一个清音帧,并且辨别一个瞬时帧。 确定的步骤包括测量帧驻留在抖动缓冲器(18)中的平均时间量,以及调整同步延迟,使得平均持续时间接近期望的抖动缓冲器驻留持续时间。
    • 9. 发明申请
    • TELECONFERENCING CONFIGURATION BASED ON PROXIMITY INFORMATION
    • 基于近似信息的电信配置
    • US20080160976A1
    • 2008-07-03
    • US11616492
    • 2006-12-27
    • Jussi VirolainenJukka SaunamakiJari Selin
    • Jussi VirolainenJukka SaunamakiJari Selin
    • H04M3/42
    • H04W4/02H04L65/4038H04L65/605H04L67/18H04M3/568H04M2203/2094H04M2207/18H04M2242/14H04M2242/30H04W4/029
    • Teleconferencing systems may adapt to changes associated with participating terminals by monitoring characteristics of the terminals and modifying audio streams in accordance with detected changes. A terminal moving from a location shared with one or more other participating terminals may be detected in a variety of ways. In response to the location change, a teleconference server may modify the audio stream transmitted to the terminal so that audio originating from the one or more other participating terminals is included in the stream. Additionally, audio streams transmitted to the one or more other terminals may also be modified to include audio signals originating from the moved terminal. Other changes to a terminal that may also affect audio processing include activating a muting function. Muting a terminal while the terminal is among a group of participating terminals may cause the audio signals from the other terminals to also be muted.
    • 电视会议系统可以通过根据检测到的改变监视终端的特性和修改音频流来适应与参与终端相关联的改变。 可以以各种方式检测从与一个或多个其他参与终端共享的位置移动的终端。 响应于位置改变,电话会议服务器可以修改发送到终端的音频流,使得源自一个或多个其他参与终端的音频被包括在流中。 此外,还可以修改发送到一个或多个其他终端的音频流,以包括源自移动终端的音频信号。 也可能影响音频处理的终端的其他改变包括激活静音功能。 当终端在一组参与终端中时,使终端静音可能导致来自其他终端的音频信号也被静音。
    • 10. 发明申请
    • Image data transfer sessions
    • 图像数据传输会话
    • US20050198338A1
    • 2005-09-08
    • US11019939
    • 2004-12-21
    • Fehmi ChebilAsad IslamJari SelinPekka PessiJose Costa-Requena
    • Fehmi ChebilAsad IslamJari SelinPekka PessiJose Costa-Requena
    • H04L29/06G06F15/16G06F17/30
    • H04L65/1006H04L29/06027H04N21/643
    • The present invention relates to the exchange of images and image related data between at least two end points 10, 11, 12, 13, in which exchange at least one wireless terminal 10, 11, 12 is a participating end point. The invention is based on the insight to use the Session Initiation Protocol as an upper layer protocol to enable usage of a client-server protocol that handles images, such that efficient transfer of image related data between a client 10, 11, 12 and a server 10, 11, 12, 13 is achieved. An embodiment of the invention is based on the further insight to use the Session Initiation Protocol as an upper layer protocol to enable usage of the JPIP protocol, which latter is a client-server protocol for handling images, such that efficient transfer of image related data between a client and a server is achieved.
    • 本发明涉及在至少两个端点10,11,12,13之间交换图像和图像相关数据,其中交换至少一个无线终端10,11,12是参与终点。 本发明基于使用会话发起协议作为上层协议以使得能够使用处理图像的客户端 - 服务器协议的洞察力,使得在客户端10,11,12和服务器之间有效传输图像相关数据 实现了10,11,12,13。 本发明的实施例基于进一步的洞察,使用会话发起协议作为上层协议,以使得能够使用JPIP协议(后者是用于处理图像的客户端 - 服务器协议),使得图像相关数据的有效传输 实现了客户端和服务器之间的连接。