engleski

Exploring the Characteristics of High Definition Television Systems

The continuous growth of digital video industry driven by constant improvements in digital processing technology has stimulated today's broadcasters to start a new transition. This new transition toward better, high definition television system will introduce and offer the audience a true, realistic experience of a perceived high resolution video content. High Definition Television (HDTV) is under consideration in many countries around the world based on the availability of flat panel displays and increasing production of HDTV content. The main difference between today's Standard Definition Television (SDTV) and HDTV systems includes increased number of scanning lines, progressive scanning capability and increased aspect ratio. Apart from the video format, another HD variation on SD is a slightly different colorimetry and multichannel audio comparable to the sound quality of a compact disc. Due to these parameter modifications larger capacity of media storage and larger bandwidth in transmission systems is needed which, on the other hand, stimulates the utilization of new and more efficient video coding techniques. This chapter examines the aforementioned HDTV characteristics as well as the influence of video coding tools on a high definition video quality. Three different HDTV video formats, 720/50p, 1080/25i and 1080/50p compressed with different sets of H.264/AVC coding tools were tested and evaluated using different picture assessment methods. Based on the results the most suitable HDTV video format is selected and recommended for usage in HDTV environment.

High Definition Television, HDTV, Standard Definition Television, SDTV, Video Formats, Picture Quality Assessment, SSIM, VQM

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