Moving Media Storage Technologies: Applications & Workflows for Video and Media Server Platforms

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Complex media storage computer systems are employed by broadcasters, digital cinemas, digital signage, and other business and entertainment venues to capture, store and retrieve moving media content on systems that will preserve the original integrity of the content over time and technological transition. This book provides detailed information related to the concepts, applications, implementation and interfaces of video file servers, intelligent storage systems, media asset management services, content distribution networks, and mission critical platforms. A tutorial and case example approach is taken to facilitate a thorough understanding of the technologies, using numerous illustrations, tables and examples. The text and appendices are designed to provide easy to access valuable reference and historical information.

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Editorial Reviews

From the Publisher
"Written especially for IT professionals involved in video production and multimedia management, this volume examines in detail the requirements of digital video and media professionals and the robust, secure and scalable storage solutions available to them. Beginning with overview material on server types, buses, disks and physical mediums, the work proceeds through a practical discussion of media specific storage issues including trans-coding and wrappers, multi-user IP storage, archives and backups, metadata and media asset management, clustering and resilience and virtualization. The work includes illustrations and tables and access to a companion website is provided."—Reference and Research Book News

"Complex media storage computer systems are employed to capture, store and retrieve moving media content on systems that will preserve the original integrity of the content over time and technological transition. This book provides detailed information related to the concepts, applications, implementation and interfaces of video file servers, intelligent storage systems, media asset management services, content distribution networks, and mission critical platforms. A tutorial and case example approach is taken to facilitate a thorough understanding of the technologies, using numerous illustrations, tables and examples. The text and appendices are designed to provide easy to access valuable reference and historical information."—Radio Magazine

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Product Details

  • ISBN-13: 9780240814483
  • Publisher: Taylor & Francis
  • Publication date: 4/15/2011
  • Edition description: New Edition
  • Pages: 652
  • Product dimensions: 7.40 (w) x 9.20 (h) x 1.40 (d)

Meet the Author

Karl Paulsen has spent over thirty years in broadcast television engineering and management holding key positions in operations, consulting, design, and systems integration. Karl is currently a Senior Technologist/Consulting Engineer with Diversified Systems. Previously he was CTO at AZCAR Technologies, a global provider of media solutions and technology integration for the moving media industry and Director of Engineering for Synergistic Technologies, Inc., and VP of Engineering at Digital Post & Graphics. Karl has focused on video file servers, storage and IP-based video technologies, including workflow, implementation and analysis for advanced digital media systems for nearly two decades. A feature columnist for TV Technology magazine, he has contributed over 150 articles to his long running 'Media Server Technology'series. Karl authored the book "Video & Media Servers: Applications and Technology" as well as dozens of other contributions to the industry. He is a SMPTE Fellow and standards community participant, a SBE Life Member and a Certified Professional Broadcast Engineer.

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Read an Excerpt

Moving Media Storage Technologies

Applications & Workflows for Video and Media Server Platforms
By Karl Paulsen

Focal Press

Copyright © 2011 Karl Paulsen
All right reserved.

ISBN: 978-0-240-81449-0

Chapter One


The process of digitally storing moving images and sound begins by converting once analog video and audio signals into a stream of discrete representations of binary numbers corresponding to sampled levels of chroma and luminance (for video) or for audio, correlating the changes in dynamic air pressure, which have already been converted into electrical signals as they were captured by transducers over time. In the digital media world, this string of binary information is represented as data and is often referred to as bits and bytes.

The recording function collects, organizes, and retains this data in a format that can be recovered for reproduction as visual information on a display or audible information on a loudspeaker-like transducer. In between the collection and the reproduction phases, the data is retained on a media form. The retention platform is referred to as storage, which can be both a process (i.e., the process of actually capturing or placing the data onto a recordable media) and the physical media itself (e.g., a magnetic hard disk, a lineal videotape, or an optical disc such as a CD-ROM or a Blu-ray Disc).


• When does data become information

• Qualifying structured versus unstructured data

• Requirements for the storage of moving images

• Identifying analog composite and component video signal sets

• Digital video recording explained in terms of its components

• Elements of digital video (bit depth, colorimetry, and formats)

Data structure

In general, data may be classified as either unstructured or structured. The factor for classification is determined by how the data is stored and how it is managed. Rigidly defined data is much easier to access and manage than random sets or elements that are arranged in nondiscriminate structures.

Rigidly structured data is traditionally relegated to databases that are built and maintained by a fully fledged database management system (DBMS). Unstructured data is considered "everything else"; however, there is an area in between, which is neither rigidly structured nor completely unstructured. This gray area is called semistructured because it has a reasonable amount of order or grouping but is clearly not consistent across an enterprise, a department, or even an individual.

In business, more than 80% of an enterprise's data that is typically used for non-media-related purposes is unstructured. This raises huge concerns for the enterprise as unstructured or semistructured data consumes an enormous amount of storage and is extremely difficult to manage.

Taking an ad hoc approach to data structures for media-related data extends the complexities well beyond what the traditional business space has had to face—with the issues and concerns growing even larger. From this, the business and technologies of storage have become a science.


Data that is created either by individuals or by enterprises needs to be stored so that it can be accessed and easily recovered for processing at a later time. There is no reasonable purpose for data unless it is capable of being presented in a meaningful form. In the business world, the knowledge and intelligence derived from this data are called information.

Before the current digital age, data were collected on printed paper and stored in filing cabinets or placed on library shelves as books or periodicals. Information could be gathered from this format because there was a structure for accessing the data that could be configured in a repeatable and definable classification. The Dewey Decimal Classification (DDC), also known as the Dewey Decimal System, was developed by Melvil Dewey in 1876, and is an example of a proprietary system that is used for library classification. The DDC is one methodology for arranging data in a structured classification.

Today, information is categorized by myriad methods each tailored to a product, an application, a location, or a service. Much of the information presented is dependent on a form of indexing. The indexing uses the concepts of tagging to put the data into a structure that is usable by others. Search engines have become the foremost means of discovering that information.

Given the enormous and growing amounts of media-related information, the value of intelligent storage and the systems associated with searching and retrieval are being elevated to new proportions. Managing the storage systems, and complimentary distribution paths such as networks and transmission devices, is becoming a significant part of what was once an area dedicated to the information technology (IT) sectors only.

For the media and entertainment industries and the public and private business sectors, these concepts are rapidly changing, resulting in a new paradigm for those systems associated with the storage of media-centric data and information.

Storing the Moving Image

Film was and remains one of the most notable forms of storing visual information either as a single static format (as in a photograph) or a series of discrete images on a continuous linear medium (as in a motion picture film).

For at least the past three decades, moving images and sound recordings have been stored on various media including wires, plastics and vinyl materials, rigid metallics, or other polymers, but primarily these recordings have been captured on the most well-known magnetic media, simply referred to as "tape."

The information contained on this lineal magnetic recording media is often segregated by the type of recorded information contained on the media, that is, sound on audiotape, visual images with sound on videotape, and for the computer industry bits representing binary information on data tape. Over the course of time, the format of these audio-, video- and data-recording processes has moved steadily away from the analog recordings domain toward the digital domain. This migration from analog to digital recording was made possible by a multitude of technological innovations that when combined into varying structures, some standardized and others not, formulate the means by which most of the audio, visual, and data are currently retained (see Fig 1.1).

However, these are all changing, as will be seen and identified in the upcoming portions of this book. Videotape as a recording and playback medium is gradually, but finally, moving away from the traditional formats of the past nearly half century.

Digital Video Recording

Digital video recording is a generalization in terminology that has come to mean anything that is not expressly an analog recording. These much belabored references have worked their way into every facet of the industry, compounded even more by the widespread introduction of high definition and the transition from analog over-the-air transmission to digital terrestrial television (DTT) broadcasting.

Clarifying 601 Digital Video

It goes without saying that digital video brought new dimensions to the media and entertainment industry. For the video segment of the industry, this began in earnest with the development of standardized video encoding in the 1980s whereby interchange and formalized products could store, in high quality, the video characterized by its original description as CCIR 601, which later became known as ITU-R BT.601 when the CCIR, International Radio Consultative Committee (French name: Comité consultatif international pour la radio), merged with others, and in 1992 became the ITU-R, International Telecommunication Union-Radiocommunications Sector.

As with many emerging technologies, technical jargon is generated that is filled with marketing hype that makes the concept "sound good" regardless of the appropriateness or accuracy of the terminology. Digital video recording was no different. With its roots embedded in analog (NTSC and PAL) structures, digital video terminology has become easy to misinterpret. In the hope that the readers of this book will be given the opportunity to "get it right," we will use the terminology that is standards based, or at least as close to the industry accepted syntax as possible. To that end, we'll start by describing the migration from analog component video through to compressed digital video storage.

Analog Component Video

Prior to digital video-encoding technologies being used for the capture and storage of moving media, videotape transport manufacturers recognized that the image quality of moving video could be better maintained if it was carried in its component video structure as opposed to the single-channel composite video format used throughout studios and transmission systems prior to digital (e.g., as composite NTSC or PAL video). Not unlike the early days of color television signal distribution in the studio, where video would be transported as discrete components throughout portions of the signal chain, the process of video interchange between analog tape recorders was pioneered by the early use of "dubbing" connector interfaces between component analog transports.

Analog Component Signals

In the era of early color television broadcasting, the impact of the legacy monochrome (black and white) signal sets remained as facilities moved from hybrid monochrome and color systems to an all color analog television plant. Those component video signals that comprised the technical elements of video signal systems consisted of both composite signals and discrete sets of signals including the primary red-green-blue (RGB) triplet set of color signals. Depending on the makeup of the video processing chains, additional horizontal and vertical synchronization (H and V) signals, composite sync (S), and color subcarrier (3.58 MHz color burst) might have been distributed throughout the facility.

Often, these signals were carried on individual coaxial cables throughout the television plant. As color television systems developed further, the number of individual discrete signals diminished, except for specialty functions such as chroma keys. The concept of component video signal technologies reemerged in the early 1980s, enabled by the desire to carry other sets of individual channels of component analog video on either pairs or triplets of coaxial cabling.

Two fundamental signal groups make up the so-called component analog video signal set. The signal set described by the three primary colors red-green-blue, better known as simply RGB, may be considered the purest form of the full bandwidth set of video signals. In a three-channel color television imaging system, a set of signals is generated from the light focused in the camera's lens and is passed to the prismatic optic block (see Fig 1.2). When the field image passes through the prism and is optically divided into three images, each corresponds to one of the elements of the RGB color set. Depending on the electrical makeup of the image, which may be a CCD or a CMOS imager, the electrical signals generated by the imager are amplified and their components are applied to electrical systems in which they are eventually scaled and combined according to the signal standard to form a television video signal.

Analog component video signal sets found in video systems may include more than just the primary RGB triplet of signals. These additional component signal sets, designated as RGBS, RGBHV, or RG&SB signals, are often used when connecting computer-generated video graphic signals to displays configured for video graphics array (VGA) signals and beyond.


Excerpted from Moving Media Storage Technologies by Karl Paulsen Copyright © 2011 by Karl Paulsen. Excerpted by permission of Focal Press. All rights reserved. No part of this excerpt may be reproduced or reprinted without permission in writing from the publisher.
Excerpts are provided by Dial-A-Book Inc. solely for the personal use of visitors to this web site.

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Table of Contents

Digital Media Recording and Storage Technologies ; Digital Disk Recorders - DDR; Non Linear Editing - NLE; Video Server Systems; Media Server Components and Disk Based Architectures; Storage Arrays; Storage Networking; Optical Based Storage Platforms; Bridging the IP and IT Worlds with the Video/Media World; Encoders and Decoders; Compression formats, bit rates and services ; Performance - Bandwidth, Stripping and Throughput ; Clustering; High Performance Storage Systems; File Transfer Protocols (FTP); Formats, Conversion and; Interchange and Exchange Formats; Scalability, Extensibility, Interoperability; Storage Management; Archives, Backup and Libraries; Applications of Video Server Technologies; Video on Demand; Digital Cinema Servers; Media Asset Management - Digital Asset Management; Workflow and Content Delivery Networks; Storage Virtualization; Multifunction Media Servers for Broadcast; Disaster Prevention; Upgrades, Updates and Forklifts

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