Blog

This blog feed is a compilation of all the articles posted on the Harris NAB 2009 web site. You can explore specific topics by selecting from the top navigation bar or filter by the list of tags in the right side bar. Thank you for visiting, and we welcome your comments on our articles! You can also subscribe to this blog as an RSS feed.

NAB White Paper: Are Fully Digital Workflows A Pipedream?

by Chris Lennon

Players in the media business (such as broadcasters, program producers/distributors, ad agencies and commercial producers) don’t believe that technologists can integrate all of their systems. Sure, they have all seen point-to-point integrations succeed, but many remain skeptical when it comes to fully integrated worklows from start to inish. In addition, many technologists don’t believe that these players know, or care, enough about metadata. Both are mistaken, of course. This leads to a bit of a chicken-and-egg situation in the realization of fully digital worklows, and the eficiencies they promise. A classic example of this is the slow adoption of new means of content identiication, such as ISAN and Ad-ID, with the improved metadata lows that these standards facilitate. This paper will explore the stumbling blocks, enablers, and milestones that users encounter along the way to their ultimate goal of fully digital worklows, and will attempt to show users the path of least resistance, with a focus on the worklows associated with advertising content.

Download full paper

NAB White Paper: The application of new LD-MOS technology to a UHF Multimedia Transmitter Design

by Martyn Horspool

For the past 10 years, 28 to 32 volt Lateral Diffused Metal Oxide Silicon (LDMOS) FET devices have become the technology of choice for high power linear amplifiers for broadcast RF amplifier applications. Advantages, including ruggedness, reliability and linearity have already been well proven. Recently developed, high-power, 50 volt, LD-MOS FET devices have now become available for the UHF television broadcast band (470 – 862MHz). This paper addresses the application of these new 50 volt high power LDMOS devices in a new transmitter design.

Download full paper

NAB White Paper: Metadata Challenges for Today’s TV Broadcast Systems

by Randy Conrod

Understanding metadata such as “audio metadata” and “Active Format Description” (AFD) is a challenge until one understands the transport of video, audio and “extra information” in today’s systems. Looking back into how extra information has traditionally been moved in analog NTSC/PAL and 270 Mb/s infrastructures allows one to understand how that “extra information” is carried in 1.5 Gb/s and now 3.0 Gb/s infrastructures. How to find and view metadata using measurement equipment is another challenge as new systems are commissioned. Even if all is ideal and metadata is utilized across the system, there still can be issues.

Download full paper

NAB White Paper: The application of SDR technology to a multi-standard exciter for television and radio broadcast systems

by Kevin Berndsen

A new frontier of broadcast system design is upon us, brought about by technology advancement and adoption. Several approaches result in the ability to select from multiple waveforms for a single system. These approaches inevitably involve software and programmable processing to create each waveform for a specific air-interface standard. However, the combination of several technologies now allows the block diagram of a deployed system to be redefined.

Download full paper

NAB White Paper: BXF - How’s It Working In The Real World?

by Chris Lennon

Broadcast eXchange Format (SMPTE 2021) has enjoyed much fanfare since its release just over a year ago in April 2008. The standard is quite broad and can mean many things to many people in terms of workflow efficiencies. The past year has witnessed much press and demo activity surrounding BXF. In this paper, we’ll look at how BXF is being deployed, giving broadcasters who have not yet implemented this protocol a glimpse into ways in which others in the industry are employing it.

Download full paper

NAB White Paper: Looks Good Leaving Here, Must Be Your Set

by Leigh Whitcomb / Paul Briscoe

Many consumers will tell you that the average quality of television has gone down in recent years — and they’re not just referring to the programming. While some HD content may indeed look pristine in the living room, it’s true that viewers’ perception of a great deal of content is that it’s become somehow worse, despite the broad deployment of digital systems and “HDTV.” Unhappy viewers may change channels, change service providers or even sue if the quality doesn’t meet their expectations. How can this be in the magical digital age? This paper looks into the types of degredations that can reduce the quality of audio and video between creation and the viewer, their impact — technically, perceptually, and artistically — and where they occur in equipment and systems. System design considerations and operational solutions are discussed, including lip sync and use of Active Format Description (AFD) in aspect ratio management.

Download full paper

NAB White Paper: Centralized and Multipoint Content Management and Control of HD Radio Networks via HD Protocol over IP

by Tim Anderson

In order to meet the needs of today’s diverse broadcast system topologies and enhance the utility of HD Radio, new system architecture has been developed. The Third Generation HD Radio Broadcast System Architecture (BSA) is made up of hardware and software components that have been designed to facilitate the evolution of radio broadcasting from the traditional single analog service to hybrid, In-Band-On-Channel (IBOC), offering multiple services in a more cost effective and reliable system than ever before.

Download full paper

NAB White Paper: Optimizing Analog + HD Radio Transport Over an Existing 950MHz STL Channel

by Alan Keane / Bob Band

This paper addresses the challenges involved in adding HD Radio transport over an existing 950 MHz STL path. Beyond simply adding an IP stream alongside the analog FM, we’ll look at what can be done if we re-examine the whole concept from the ground up with joint FM/HD transport in mind. What should the next generation of 950 MHz STL look like? What combination of technologies, both new and established, provide the best recipe for success?

Download full paper

NAB White Paper: High power, common amplification of FM+HD Radio transmissions with elevated sideband levels

by Geoff Mendenhall

This paper traces the process of selecting the technology and developing a new high power, VHF, transmitter for the common amplification of FM+HD signals. This paper also explains the application of new, high power, RF amplifier and power supply technologies to elevated HD Radio sideband transmission.

Download full paper

NAB White Paper: On-Channel repeater IMPLEMENTATION for HD radio coverage improvement

by Richard Redmond

This paper will be a discussion of the key considerations one needs to evaluate when developing implementation plans for enhanced HD Radio coverage using “on-channel” repeaters or gap fillers. We will examine the implications, challenges and limitations of receiving a HD Radio signal off the air, and repeating the digital only portion on the same channel. There will be a review of antenna isolation required, practical power levels, the benefits and limitations of adaptive echo cancellation and impact on receiver performance. This presentation will explore space planning, power levels and the ongoing costs. This discussion is based on the real world experience with similar projects and networks Harris has been involved with around the world.

Download full paper

Previous Page Next Page

 

  RSS Feed

Products & Solutions Links

More product information can be found at broadcast.harris.com:
Product Index
Brochures & Data Sheets

Pages
Tags
Archives