install skype on 64 bit linux system

本文介绍了Skype软件的基本信息及其在Ubuntu系统上的安装过程。此外还提供了如何调整摄像头设置的方法,并列举了一些常见问题的解决方案。

URL FROM: https://help.ubuntu.com/community/Skype

Introduction

Skype is proprietary software that allows you to make calls over the Internet using your computer. Skype uses semi-decentralized peer-to-peer technologies, so your calls do not go through a central server, but through a pool of dedicated servers. It uses its own proprietary communication protocol to achieve this. The Skype software is free to use, but it is not free software; the source code is proprietary and not available for review or modification.

SkypeEthics gives information on why some users do not use Skype.

Open alternatives Softphones using open protocols include Ekiga and Twinkle.

You need a working sound input and output configuration in order to use Skype. Most modern computers have sound output out of the box, but you need a microphone (headset) for the input. In order to broadcast video, you'll need a webcam - see SkypeWebCams.

Links to detailed information about Skype issues on Ubuntu can be found in the Resources section below.

Installing Skype

Users of 64-bit Ubuntu, should enable MultiArch if it isn't already enabled by running the command

sudo dpkg --add-architecture i386

Since Ubuntu 10.04 (Lucid Lynx), Skype is part of the Canonical partner repository. To install Skype add the Canonical Partner Repository. You can do this by running the command

sudo add-apt-repository "deb http://archive.canonical.com/ $(lsb_release -sc) partner"

Then install Skype via the Software-Center or via the Terminal.

sudo apt-get update && sudo apt-get install skype

It is highly recommended to use the package provided in the Canonical partner repository, not the one distributed from the skype website, as the skype website currently points users to the wrong package for 64-bit systems of Ubuntu 11.10 and above.

Running Skype

To start Skype, choose Applications->Internet->Skype. It usually takes a minute or two for Skype to get started, and you may think that nothing is happening, so be patient.

When the Skype window finally opens, sign up (if necessary) and log in to your Skype account. Test your configuration by selecting the Echo / Sound Test Service contact (if not there already, add contact echo123) and clicking on the large green button at the bottom of the Skype window. If the connection is made and you hear a voice, your sound configuration is fine. If you cannot hear a voice, see the troubleshooting section below.

Adjusting the camera in Skype

The Linux Skype client, while it seems to set reasonable defaults, does not offer any significant way to adjust brightness, contrast, backlight compensation etc. If you are using a uvcvideo based device (see lists at Linux UVC driver and tools) a handy way is to use the guvcview utility, which opens your webcam and allows you to fiddle with the common settings. These settings (mostly) remain when you close it and open a Skype video preview (in the Options | Video Devices menu) or make a video call. (Note that you cannot have Skype and guvcview reading the camera video stream at the same time.) Install the "guvcview" package in the normal way for this.

Or, if you want to tweak settings live during a preview or call, use the "uvcdynctrl" command-line utility (package has the same name). For example, in a terminal:
    uvcdynctrl -s 'Backlight Compensation' 7
will increase the backlight compensation to 7 from its default value of 0. To see a complete list of the possible settings for your webcam, do
    uvcdynctrl -cv

You can also use "guvcview" in a control-only mode to adjust camera settings during the call. To do so launch guvcview with the -o switch:
    guvcview -o

Troubleshooting Skype

If you need help with troubleshooting Skype please take a look at the following page. TroubleShooting Skype

Reporting Skype Bugs

Despite Skype being offered in Ubuntu through the Partner repository as a service to Ubuntu users by Canonical and Skype (a division of Microsoft), it is not considered a part of Ubuntu. Because of this, filing Skype crash reports for processing on Launchpad by Apport Retracing service is unsupported. If one attempts to do this, they will receive a message noting:

Problem in skype-bin
The problem cannot be reported:
This is not an official Ubuntu package. Please remove any third party package and try again.

One may still file a bug report on Launchpad via https://bugs.launchpad.net/ubuntu/+source/skype/+filebug.

See Also


通过短时倒谱(Cepstrogram)计算进行时-倒频分析研究(Matlab代码实现)内容概要:本文主要介绍了一项关于短时倒谱(Cepstrogram)计算在时-倒频分析中的研究,并提供了相应的Matlab代码实现。通过短时倒谱分析方法,能够有效提取信号在时间与倒频率域的特征,适用于语音、机械振动、生物医学等领域的信号处理与故障诊断。文中阐述了倒谱分析的基本原理、短时倒谱的计算流程及其在实际工程中的应用价值,展示了如何利用Matlab进行时-倒频图的可视化与分析,帮助研究人员深入理解非平稳信号的周期性成分与谐波结构。; 适合人群:具备一定信号处理基础,熟悉Matlab编程,从事电子信息、机械工程、生物医学或通信等相关领域科研工作的研究生、工程师及科研人员。; 使用场景及目标:①掌握倒谱分析与短时倒谱的基本理论及其与傅里叶变换的关系;②学习如何用Matlab实现Cepstrogram并应用于实际信号的周期性特征提取与故障诊断;③为语音识别、机械设备状态监测、振动信号分析等研究提供技术支持与方法参考; 阅读建议:建议读者结合提供的Matlab代码进行实践操作,先理解倒谱的基本概念再逐步实现短时倒谱分析,注意参数设置如窗长、重叠率等对结果的影响,同时可将该方法与其他时频分析方法(如STFT、小波变换)进行对比,以提升对信号特征的理解能力。
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