Officials said there were discussions between TRAI officials and stakeholders on whether there should be an external regulator for the rating agencies or whether the industry should deal with it on its own.
TRAI had earlier received a reference from the Information and Broadcasting Ministry in August 2012 seeking its advice on framing an accreditation mechanism for rating agencies.
The TAM ratings, currently used by many advertising agencies, have been for long a subject of controversy as broadcasters ranging from Prasar Bharati to NDTV have questioned their methodology and accuracy.