----------------------------------------------------------- Description of the CallFriend telephone speech corpus for Tamil ----------------------------------------------------------- July, 1997 CONTENTS 1. Summary abstract 2. Data acquisition 3. Data verification 4. Speaker demographics ----------------------------------------------------------------------- 1. Summary abstract The CallFriend Tamil corpus of telephone speech was collected by the Linguistic Data Consortium primarily in support of the project on Language Identification (LID), sponsored by the U.S. Department of Defense. This release of the CallFriend Tamil corpus consists of 60 unscripted telephone conversations between native speakers of Tamil. The recorded conversations last up to 30 minutes. All speakers were aware that they were being recorded. They were given no guidelines concerning what they should talk about. Once a caller was recruited to participate, he/she was given a free choice of whom to call. Most participants called family members or close friends. All calls originated in either the United States or Canada. ----------------------------------------------------------------------- 2. Data acquisition Speakers were solicited by the LDC to participate in this telephone speech collection effort via the internet, publications (advertisements), and personal contacts. A total of 100 call originators were found, each of whom placed a telephone call 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. The participants were made aware that their telephone call would be recorded, as were the call recipients. The call was allowed only if both parties agreed to being recorded. Each caller was allowed to talk up to 30 minutes. Upon successful completion of the call, the caller was paid $20 (in addition to making a free long-distance telephone call). Each caller was allowed to place only one telephone call. ----------------------------------------------------------------------- 3. Data verification After a successful call was completed, a human audit of each telephone call was conducted to verify that the proper language was spoken, and to check the quality of the recording. The information from this audit may be found in the file "callinfo.tbl", and its contents are described in greater detail in "callinfo.doc". ----------------------------------------------------------------------- 4. Speaker demographics Information on speaker demographics can be found in the file "spkrinfo.tbl", whose contents are described in the file "spkrinfo.doc". -----------------------------------------------------------------------