Article | REF: TE5682 V1

High definition television (HDTV) - capturing & editing

Authors: Jacques GAUDIN, Jean-Noël GOUYET, Marc LEGER

Publication date: August 10, 2010

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ABSTRACT

High definition (HD) images are currently offered by television. A small technological revolution based upon the use of digital technology, HDTV (High Definition television) allows for achieving an extremely high quality of visual contents, which is perfectly in keeping with the recent placing of the market of plasma and LCD screens. Designing, implementing and operating a complete HDTV chain requires the taking into account of a significant number of native and compression formats, as well as parameters and values. The HD camera and the recorder are the first links in the chain and determine directly the initial quality of the produced video images. This article presents the functions and characteristics of capturing/recording and editing.

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AUTHORS

Jacques GAUDIN: Graduate of the École nationale supérieure Louis Lumière - Head of the Image program at the Institut national de l'audiovisuel (Ina SUP)
Jean-Noël GOUYET: Training engineer in digital television and multimedia techniques and systems - Former researcher at Ina's Research Department
Marc LEGER: Graduate of the École nationale supérieure Louis Lumière - Camera operator - Vision engineer - Ina SUP trainer

INTRODUCTION

High-definition (HD) images are now available on television: HDTV (high-definition television). Initiated in analog form in the mid-1980s by the Japanese, then by the Europeans, HDTV was temporarily abandoned and only really revived with the digital television project in the United States. This process led to international standards in the mid-1990s.

This dossier not only updates the [TE 5 674] dossier published in February 2004, "High-definition images: between digital cinema and HD television", but completes it with a detailed functional and technical presentation of the entire HD television chain. It is divided into 3 parts:

the first part concerns formats. The 1 ^er document [TE 5 680] describes the native parameters of images produced by HDTV and the corresponding standards. The following document [TE 5 681] details the compression formats used to reduce the bit rate of HD digital video, making it possible to capture, transport, store, transmit and receive HD images in the world of television. It also presents the problem of encapsulating HD images in data file container or transport formats;
This 2nd part, consisting of the three documents, describes the main functions, from camera lens glass to flat screen glass (from glass to glass), of capturing/recording, editing [TE 5 682], broadcasting and distribution [TE 5 683] , displaying and evaluating the quality of HD images [TE 5 684] ;...