Switchboard-2 Phase I

Introduction Switchboard-2 Phase I consists of 3,638 5-minute telephone conversations involving 657 participants. This corpus was collected by the Linguistic Data Consortium (LDC), in support of a project on Speaker Recognition sponsored by the U.S. Department of Defense. This release consists of speech files only; these calls were not transcribed. Data Speakers were solicited by the LDC to participate in this telephone speech collection effort via the internet, publications (advertisements) and personal contacts. Potential participants responded from all areas of the United States, although the majority of the subjects were from the Mid-Atlantic area: (PA=303), (NJ=116), (NY=53), (DE=13), (CT=12), (MD=14), (OH=13) and (MA=8). Most of the participants in SWB-2 Phase I were college students from the following universities: Penn State University, University of Delaware, University of Pennsylvania, Drexel University and Rutgers University. Of the 657 participants, 358 were female and 299 were male. An LDC recruiter asked all participants for the following demographic information: age, sex, years of completed education, country of birth, city and state where raised. Each recruit was asked to participate in at least ten five-minute phone calls. Ideally each participant would receive five calls at a designated number and make five calls from phones with different telephone numbers (ANI codes). The average subject participated in 11 conversations; however, one gentleman participated in 64 calls. A suggested topic of discussion was given (read by the automated operator), although participants could chat about whatever they preferred. Each of the 657 participants placed their calls via a toll-free robot operator maintained by the LDC. Access to the robot operator was possible via a unique Personal Identification Number (PIN) issued by the recruiting staff at the LDC when the caller enrolled in the project. Upon conclusion of the study all calls were audited by LDC staff members. Particular attention was paid to PIN verification (matching speaker with PIN), checking call duration and call quality. Upon completion of this process checks were issued and mailed to participants. Updates 09/29/2011: A file list and updated readme were added to reflect the data set's release on DVD. Portions © 1998 Trustees of the University of Pennsylvania

# 引言
Switchboard-2 第一阶段数据集包含657名参与者发起的3638段5分钟电话通话语料。该语料库由语言数据联盟（Linguistic Data Consortium, LDC）采集，用于支撑美国国防部发起的说话人识别相关研究项目。本次发布仅包含语音文件，未附带通话转录文本。

## 数据说明
语言数据联盟通过互联网、公开宣传广告及线下联络等渠道招募参与者参与本次电话语音采集工作。最终报名参与者来自美国全境，但主体集中在中大西洋地区：(PA=303)、(NJ=116)、(NY=53)、(DE=13)、(CT=12)、(MD=14)、(OH=13) 及 (MA=8)。
本次数据集的多数参与者为来自以下高校的在校大学生：宾夕法尼亚州立大学、特拉华大学、宾夕法尼亚大学、德雷塞尔大学与罗格斯大学。657名参与者中，女性358名，男性299名。
语言数据联盟的招募人员会向所有参与者收集以下人口统计学信息：年龄、性别、受教育年限、出生国家、成长所在城市与州份。
每位参与者需完成至少10段5分钟的电话通话。理想情况下，每位参与者应接听5通指定号码的来电，并使用5个不同电话号码（自动号码识别码，Automatic Number Identification codes, ANI codes）主动发起通话。本次采集的平均参与次数为11通，但有一名参与者完成了64通通话。
系统会向参与者提供预设讨论话题（由自动话务员播报），但参与者也可自由选择聊天主题。所有657名参与者均通过语言数据联盟维护的免费机器人话务系统发起通话。参与者需使用招募时由语言数据联盟工作人员发放的唯一个人识别码（Personal Identification Number, PIN）登录机器人话务系统。
通话结束后，语言数据联盟的工作人员会对所有通话进行审核，重点核查个人识别码与说话人的匹配情况、通话时长及通话质量。全部审核流程完成后，工作人员会向参与者发放并邮寄报酬。

## 更新记录
2011年9月29日更新：新增文件列表与更新版说明文档，以适配本数据集的DVD光盘发布形式。
版权所有：© 1998 宾夕法尼亚大学校董会