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1. 发明授权

US5539741A Audio conferenceing system 失效
标题翻译：音频会议系统
公开(公告)号：US5539741A
公开(公告)日：1996-07-23
申请号：US346553
申请日：1994-11-29
申请人： Keith Barraclough , Peter R. Cripps , Adrian Gay
发明人： Keith Barraclough , Peter R. Cripps , Adrian Gay
IPC分类号： G06F15/00 , G06F13/00 , H04L12/18 , H04M3/56 , H04N7/15 , H04Q11/04
CPC分类号： H04L12/1813 , H04M3/567 , H04M3/568 , H04N7/15 , H04M3/42161
摘要： A computer workstation receives multiple audio input streams over a network in an audio conference. The audio input streams are kept separate by storing them in different queues. Digital samples from each of the queues are transferred to an audio adapter card 28 for output. A digital signal processor 46 on the audio adapter card multiplies each audio stream by its own weighting parameter, before summing the audio streams together for output. Thus the relative volume of each of the audio output streams can be controlled. For each block of audio data, the volume is calculated and displayed to the user, allowing the user to see the volume in each audio input stream independently. The user is also provided with volume control for each audio input stream, which effectively adjusts the weighting parameter, thereby allowing the user to alter the relative volumes of each speaker in the conference.
摘要翻译：计算机工作站通过音频会议中的网络接收多个音频输入流。通过将音频输入流存储在不同的队列中来保持音频输入流的分离。来自每个队列的数字样本被传送到音频适配器卡28以便输出。音频适配器卡上的数字信号处理器46在将音频流相加在一起以输出之前，通过其自身的加权参数将每个音频流相乘。因此，可以控制每个音频输出流的相对音量。对于每个音频数据块，计算并显示给用户的音量，允许用户独立地查看每个音频输入流中的音量。用户还为每个音频输入流提供音量控制，其有效地调整加权参数，从而允许用户改变会议中每个说话者的相对音量。

2. 发明授权

US5553073A Token ring network 失效
标题翻译：令牌环网
公开(公告)号：US5553073A
公开(公告)日：1996-09-03
申请号：US474826
申请日：1995-06-07
申请人： Keith Barraclough , Peter Cripps , Adrian Gay , Alan Jones
发明人： Keith Barraclough , Peter Cripps , Adrian Gay , Alan Jones
IPC分类号： G06F13/00 , H04L12/433 , H04L12/42
CPC分类号： H04L12/433
摘要： A token ring local area network includes workstations running both conventional data and multimedia applications. The latter, which generally requires a minimum throughput in order to be viable, can be split into two further categories; those which cannot tolerate excessive latency (end to end delay), typically interactive applications such as voice communications, and those which are less sensitive to latenoy, typically playback operations, the network recognises three priority levels: (1) for latency-sensitive multimedia applications, (2) for latency-insensitive multimedia applications, and (3) conventional applications. All multimedia applications prior to commencement of any communications over the LAN must request an allocation of throughput from a LAN segment resource manager (LSRM), which will only be awarded if there is currently sufficient available throughput on the LAN to support the attended communication. Furthermore, first priority level applications are also given a maximum token holding time, thereby ensuring rapid circulation of the token, and controlling latency.
摘要翻译：令牌环局域网包括运行常规数据和多媒体应用的工作站。后者通常需要最小生产量才能生存，可以分为两类：那些不能容忍过度延迟（端到端延迟）的通常是诸如语音通信的交互式应用以及对Latenoy较不敏感的通常的回放操作，网络识别三个优先级：（1）对于延迟敏感的多媒体应用，（2）用于延迟不敏感的多媒体应用，以及（3）常规应用。在通过LAN开始任何通信之前，所有多媒体应用程序必须从LAN段资源管理器（LSRM）请求分配吞吐量，只有当LAN上当前有足够的可用吞吐量来支持所参与的通信时才会被授予。此外，第一优先级应用程序也被赋予最大令牌保持时间，从而确保令牌的快速循环以及控制等待时间。

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