Technical analyst exposes 'C- 4' gutter journalism
< C-4 video created from a video camera, not from a mobile
phone.
< Sound dubbed: a case study for gutter journalism.
In video coding or broadcasting to create a
final video for any occasion it is the practice to start with high
quality video first while transcending with editing for a final product.
Mpeg4 is a compressed format.
If one considers the Channel- 4 video:
● It says it came from a
mobile phone video source. There are only two formats in mobile
video formats. One is an old 3GPP format and the other an advanced
Mpeg4, H-264 part 10 which is MP4 format which is highly
processor intensive encoding and due to this issue, mobile phones in the
present markets does not produce high quality videos. Such processors
are not that powerful to take good quality video that Channel- 4 claims
since channel - 4 video is much high quality than existing Smart
phones can create TODAY.
● Within H-264 coding we also
have extra component called Motion Vectors (VMC) which are used
to predict motion on temporal and spatial domain. The Channel - 4 video
have quite high quality VMC(motion Vector) and this VMC came from a
video camera and not from a mobile phone source. Also Mobile source
also tend to be blocky in nature when it come to motion.
● Since original video is
from AVI and QuickTime format, the whole video scenario indicates that
ORIGINAL video is of high quality that came from a video camera source
since mobile formats does not use AVI or Quicktime which are high
quality video formats.
● If they changed the mobile
format to AVI or QT then the final video will be of poor quality. In the
analysis it was found that the AVI and QT formats are of very high
quality.
● Also it is quite
explicit that the camcorder video was transferred to a computer for
editing and sound was dubbed later and gun shots were not in synchronism
with the video and normally audio is always way ahead of the video since
video processing takes time and in this case the audio is very late
INDICATING a very amateurish video and audio editing.
(Siri Hewawitharana,
former head of Cisco's global
broadcast and digital video practice, has held a number of significant
business development and technical leadership roles with some of the
world's most successful telecommunication and broadcasting organisations.
These include head of systems engineering for Star TV Hong Kong, head of
visual communication for OTC and director of engineering for WIN TV. As
chief architect of Optus' Network Systems Design Broadcast and Satellite
TV operation, Mr. Hewawitharana was responsible for creating and
operating Optus' $47 million Pay TV Video Operations Centre.) |
