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Blizzard Challenge 2011

From SynSIG
Data for the Blizzard Challenge 2011 was generously provided by Lessac Technologies
Google UK has generously provided financial support to the Blizzard Challenge 2011


This Blizzard Challenge has finished

Read these first

Data download and license agreements

  1. Register: by emailing We need to know your team name, the name of the main contact person, your affiliation, and contact details including email address, postal address and phone number.
  2. License: complete the license agreements for the data, which can all be accessed via
  3. Download: You will be sent a username and password to download the data. These are the same for all downloads, and will only be activated after you have returned the license agreement. Download links can be found on the above page.
  • Development tools, available via :, include:
    • Submitted synthetic speech and listener scores for some previous Blizzard Challenges, which may be helpful during development

Mailing list

There is a mailing list for discussion and announcements for the challenge:

Participants must join the list by sending a message to with the following line in the body of the message

 subscribe blizzard-discuss

Once you a member you will be able to mail messages to


The timeline shown on this web page is the offical one and supercedes those shown in announcements - it is subject to change, but we will try to follow it as closely as possible. Note that we will not consider any requests from participants to change the synthetic speech submission date or the paper submission date!

  Mar  4 2011 Databases released
  Apr 15 2011 Test sentences released
  Apr 22 2011 Deadline for submitting synthesized speech 
  Apr 29 2011 Evaluation system goes live
  Jun 25 2011 End of Evaluation
  Jul 12 2011 Deadline for returning the participant questionnaire
  Jul 12 2011 Results distributed to teams who have returned their questionnaire
  Jul 31 2011 Satellite workshop papers due
  Aug 5 2011 Notification of acceptance 
  Aug 28-31 2011 Interspeech 2011, Florence, Italy
  Sep  2 2011 Presentation of results at the satellite workshop, in Turin, Italy


Information on the workshop can be found here: Blizzard Challenge 2011 Workshop

Any questions?

  • Please contact if you have any questions

Previous challenges

Concurrent challenges

SynSIG is a Special Interest Group of ISCA, the International Speech Communication Association.

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