ATT Inc is set to announce its expected acquisition of top U.S. satellite TV operator DirecTV on Sunday, according to a report by online news website Buzzfeed.com. A spokesman for ATT said the firm would make no comment on the report. DirecTV did not immediately respond to a request for comment. ATT has been in active discussions to buy DirecTV for nearly $50 billion, or low to mid-$90s per share, and has been working to finalize a deal in the next few weeks, Reuters reported last Monday.