Video. Table of Content. Introduction Types of video signal Types of analog video signal Computer-based digital video Broadcast and video standards Characteristics of digital video Digital video data sizing Ways to reduce video file size Video file formats. Definition of Video. Video:
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a sequence of still images representing scenes in motion.
Gives the best colour reproduction, since no “crosstalk” between the three different channels, unlike composite video and S-video.
Requires more bandwidth and good synchronization of the three components.
Chroma (colours ) UV and Luminance (Brightness) Y = YUV
The aspect ratio of current television tubes is 4/3.
For wide-screen television tubes the aspect ratio is 16/9
F * C * R * T
Video file size=600 sec x 25 fps x 160 x 120 x (8-bit/8)
= 288,000,000 bytes
= 288 MB
Video File Size:
(10 sec x 30 fps x 640 x 480 x 2 bytes) +
(10 sec x 44100 Hz x 8-bit/8 x 2)
= 184,320,000 + 882,000 bytes
= 185,202,000 bytes
(Time(in sec)*Frame rate*Frame size*Colour resolution(in byte))
(Time(in sec)*Frequency(in Hz)*Sound resolution(in byte)*Channel)