Information Technology Reference
In-Depth Information
Chapter 7
A Flexible Super High Resolution Video
CODEC and Its Trial Experiments
Takeshi Yoshitome, Ken Nakamura, and Kazuto Kamikura
Abstract. We propose a flexible video CODEC system for super-high-resolution
videos such as those utilizing 4k x 2k pixel. It uses the spatially parallel encod-
ing approach and has sufficient scalability for the target video resolution to be en-
coded. A video shift and padding function has been introduced to prevent the image
quality from being degraded when different active line systems are connected. The
switchable cascade multiplexing function of our system enables various super-high-
resolutions to be encoded and super-high-resolution video streams to be recorded
and played back using a conventional PC. A two-stage encoding method using the
complexity of each divided image has been introduced to equalize encoding quality
among multiple divided videos. System Time Clock (STC) sharing has also been
implemented in this CODEC system to absorb the disparity in the times streams are
received between channels. These functions enable highly-efficient, high-quality en-
coding for super-high-resolution video. The system was used for the 6k x 1k video
transmission of a soccer tournament and the 4k x 2k video recoding of SATIO
KIKEN orchestral concert.
1
Introduction
The number of video applications for super-high-resolution (SHR) images has been
increasing in the past few years. SHR video images are 2 - 16 times larger than
HDTV images, and they have 30 - 60 fps. Because of their high quality and the high
level of realism they convey to the viewer, SHR systems[1, 2, 3, 4, 5] are expected to
be platforms for many video applications, such as digital cinema, virtual museums,
and public viewing of sports, concerts and other events. For SHR video applications,
it is important to reduce the network bandwidth, because raw SHR video requires
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