NBTC secretary-general Thakorn Tantasith said the commissioner unamous in their decision.
Viewers could use the coupons to either offset the cost of a digital television set or a digital TV set-top box compliant with the Digital Video Broadcasting - Second Generation Terrestrial (DVB-T2) system.
The coupons will be valid for six months. They will reach 22 million families nationwide by mail. Distribution will begin in September to viewers in the greater Bangkok area, Chiang Mai, Khon Kaen and Songkhla provinces presently covered by digital TV broadcasting, he said.
Other areas will follow.
The NBTC will propose the resolution to the National Council for Peace and Order for approval on July 30.
It will instruct the government organisation that prints the coupons to prevent forgery and fraud, and it will set the qualifications of participating set-top box suppliers and the amount of their guarantees, Mr Thakorn said.