GDL

ISBN 0-470-84837-5
Book from gdlhub / 2012-06-18 09:15:18
Oleh : Iain E. G. Richardson, Wiley Publishing, Inc.
Dibuat : 2012-06-18, dengan 1 file

Keyword : H.264 and MPEG-4 Video Compression
Subjek : H.264 and MPEG-4 Video Compression
Sumber pengambilan dokumen : Internet

Scene 1: Your avatar (a realistic 3D model with your appearance and voice) walks through


a sophisticated virtual world populated by other avatars, product advertisements and video


walls. On one virtual video screen is a news broadcast from your favourite channel; you want


to see more about the current financial situation and so you interact with the broadcast and


pull up the latest stock market figures. On another screen you call up a videoconference link


with three friends. The video images of the other participants, neatly segmented from their


backgrounds, are presented against yet another virtual backdrop.


Scene 2: Your new 3G vidphone rings; you flip the lid open and answer the call. The face


of your friend appears on the screen and you greet each other. Each sees a small, clear image


of the other on the phone’s screen, without any of the obvious ‘blockiness’ of older-model


video phones. After the call has ended, you call up a live video feed from a football match. The


quality of the basic-rate stream isn’t too great and you switch seamlessly to the higher-quality


(but more expensive) ‘premium’ stream. For a brief moment the radio signal starts to break


up but all you notice is a slight, temporary distortion in the video picture.

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