Weekly Tech Reminders: NAB Show, Interference & More

An excerpt from this week’s Monday Morning Coffee and Technical Notes
Publish date:

The following is from the Alabama Broadcasters Association’s weekly e-newsletter, Monday Morning Coffee and Technical Notes. Thanks to ABA’s Larry Wilkins. To subscribe to the newsletter, email lwilkins@al-ba.com.


The Las Vegas Convention center sits empty today after over 100,000 broadcasters filled the halls last week at the annual NAB Convention. Some 1800 vendors displayed their products and services for all to see in full operation.

IP was the buzz word this year for both audio and video. ATSC 3.0, the next generation television broadcasting (which is an IP stream) was an extremely hot topic in the television halls. On the radio side, audio over IP was everywhere, with AES 67 being one of the major topics at the booths.

You always see new items — Two that caught my attention were the ATSC 3.0 converters by Airwavz. These unit will demodulate ATSC 3.0 television RF and output to HDMI for use on non ATSC 3.0 television sets.

Audinate introduced the Dante AVIO which is a dongle converter for Dante. Units are available to convert analog, USB or AES3 audio to Dante.


As rumored for several months the FCC publicly released a Report and Order last week eliminating TV stations' annual obligation to report whether they have provided fee-able ancillary or supplementary services on their spectrum during the past year

unless they have actually provided such services.

Normally all television stations had to report by December 1st whether they had provided fee-able ancillary or supplementary services in the past year., what those services were, and then submit payment to the government of 5% of the gross revenue derived from such services.

The order amends Section 73.624(g) of the FCC's Rules to require that only TV stations actually providing fee-able ancillary or supplementary services need file the report in the future.


Most engineers involved in digital audio or video have heard the word dithering, but few understand it completely.

Dither is an intentionally applied form of noise used to randomize quantization error, preventing large-scale patterns such as color banding in images.

Dither is routinely used in processing of both digital audio and video data, and is often one of the last stages of mastering audio to a CD.

Most often is low volume noise, introduced into digital audio when converting from a higher bit-resolution to a lower bit-resolution. The process of reducing bit-resolution causes quantization errors, also known as truncation distortion, which if not prevented, can sound very unpleasant.