Jack Valenti, former Motion Picture Association of America chief, will speak at the all-industry luncheon during the National Association of Broadcasters convention in Las Vegas April 24, NAB said Tuesday.

Mr. Valenti, according to NAB, is expected to brief broadcasters on an industry-wide effort to promote the v-chip and other blocking technologies that consumers can use to prevent objectionable programming from getting into their homes. The TV industry is hoping that the initiative will pre-empt pending legislation to crack down on off-color programming.