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For Immediate Release

ATSC Aproves Enhancements to DTV Standard
E-VSB Provides Additional Flexibility

WASHINGTON, D.C., July 20, 2004 – The Advanced Television Systems Committee, Inc. (ATSC) has approved an amendment to the A/53C DTV Standard that adds a new optional mode of transmission called Enhanced VSB (E-VSB).  Services transmitted in the E-VSB mode have additional forward error correction coding layers that allow reception under weaker signal conditions.

“E-VSB was developed in response to the desire of broadcasters to add more flexibility to the DTV Standard” said Mark Richer, ATSC president. “E-VSB was chosen from among multiple technologies after a rigorous evaluation process that included laboratory and field tests.”

E-VSB provides optional modes of operation that allow broadcasters to trade-off data rate for a lower carrier-to-noise threshold for some services. Examples of potential applications for E-VSB include delivery of “fall back” audio, programming services targeted at small DTV receivers with indoor antennas, non-real time transmissions of file-based information to handheld and pedestrian receivers, and robust data broadcasting to devices such as desktop and laptop computers. The ATSC has previously published a number of related Candidate Standards that support the E-VSB System.  CS/T3-608 and CS/T3-609 provide transport specifications, and CS/T3-606 provides enhancements to the ATSC PSIP Standard (A/65). Enhancements to AC-3 audio (E-AC-3) are contained in documents CS/T3-613 and CS/T3-614. ATSC Standards and Candidate Standards are available at

The Advanced Television Systems Committee, Inc. is an international, non-profit organization developing voluntary standards for digital television.  The ATSC member organizations represent the broadcast, broadcast equipment, motion picture, consumer electronics, computer, cable, satellite, and semiconductor industries.


Contact:  Lisa Hester , ATSC (202) 872-9160

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