Standards Define Closed-Captioning Rendering in 3D Programs, IR Signaling
for Active-Shutter Glasses
By Todd Spangler — Multichannel News
The Consumer Electronics Association announced the publication of a standard
for 3DTVs to render closed-captioning services and another for synchronizing
active-shutter 3D glasses via an infrared signal.
The first spec, CEA-708.1, “Digital Television (DTV) Closed Captioning: 3D
Extensions,” specifies signaling to allow closed captioning to be rendered
with stereoscopic 3D program content. The standard allows for a standardized
method to set a value for the perceptual depth for closed-captioning text,
or a series of values that change over time.
The other — CEA-2038, “Command-Driven Analog IR-Synchronized Active
Eyewear” — defines a way for controlling “active” 3D glasses worn by
viewers using an infrared signal sent by a TV set.
The CEA published the 3D closed-captioning standard June 14
tee%2FCEA-708-1.aspx> . Access to the full document costs $42.75 for CEA
members and $57 for nonmembers.
The active 3D glasses specification was published May 11
aspx> and is $66 for CEA members and $88 for nonmembers.
CEA also Monday announced three other standards — CEA-2042.1-A, Wireless
Power Glossary of Terms; CEA-805-D-1, Data Services on the Component Video
Interfaces; and ANSI/CEA-2041, Standard for a Round Tactile Indicator — as
well as a technical report that details results of a comprehensive study of
ambient light levels in typical television viewing locations.