The NBA's three network partners all drew their second-highest total of viewers for a full regular season, while NBA TV had its highest total.
TNT, in its 29th year televising the NBA, averaged about 2 million viewers for its 52 telecasts. Miami's season-opening victory over Boston drew nearly 5.4 million, making it the fifth most-watched NBA regular-season game ever on cable.
NBA TV's record audience of 868,000 viewers for the Lakers-Portland game on Oct. 31 helped it average 336,000 for its 98 regular-season telecasts, a 33 percent increase over 2010-11, the last full regular season.
Viewership for games on TNT, ABC and ESPN is up 37 percent in the last decade.
The NBA also says Thursday that NBA.com had its best season with nearly 6.6 billion page views and 3.9 billion video streams.