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How Video Works?

How Video Works?

Flávio Ribeiro

December 02, 2017
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  1. how pixels are represented? 1 bit (1 or 0) 2

    bits (11, 10, 01 or 00) 8 bits (you got that, right?)
  2. colored image 3 x 4 x 4 x 8 bits

    = 384 bits = 48 Bytes
  3. 3 x 1920 x 1080 x 8 bits x 24

    frames ≈ 149 MB
  4. 3 x 1920 x 1080 x 8 bits x 24

    frames x 60 minutes ≈ .5 TB
  5. It would take… 04 days and 15 hours to download

    it in a 10 Mbps connection 11 hours to download it in a 100 Mbps connection
  6. video images (frames) pixels colors RGB 24 frames bits lots

    of information compression exploit the eye
  7. video images (frames) pixels colors RGB 24 frames bits lots

    of information compression exploit the eye reduce redundancy
  8. video images (frames) pixels colors RGB 24 frames bits lots

    of information compression exploit the eye reduce redundancy correlations in time
  9. video images (frames) pixels colors RGB 24 frames bits lots

    of information compression exploit the eye reduce redundancy correlations in time codec
  10. video images (frames) pixels colors RGB 24 frames bits lots

    of information compression exploit the eye reduce redundancy correlations in time codec codec != container
  11. video images (frames) pixels colors RGB 24 frames bits lots

    of information compression exploit the eye reduce redundancy correlations in time codec codec != container bitrate
  12. video images (frames) pixels colors RGB 24 frames bits lots

    of information compression exploit the eye reduce redundancy correlations in time codec codec != container bitrate progressive download
  13. video images (frames) pixels colors RGB 24 frames bits lots

    of information compression exploit the eye reduce redundancy correlations in time codec codec != container bitrate progressive download adaptive bitrate