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ThinkMind // MMEDIA 2013, The Fifth International Conferences on Advances in Multimedia // View article mmedia_2013_6_30_40108


Efficient Stream-Reassembling for Video Conferencing Applications using Tiles in HEVC

Authors:
Christian Feldmann
Christopher Bulla
Bastian Cellarius

Keywords: HEVC; video conferencing; video mixing; coded domain; tiles; slices

Abstract:
In a modern video conferencing application, the people participating at each client can be detected, tracked and placed in a virtual scene where all persons are of equal size and occupy a predefined rectangular space. This virtual scene can then be rendered on screen instead of a whole room with several people. As a result, a more immerse video conferencing impression is created. At a Multipoint Control Unit (MCU) it is beneficial to disassemble and reassemble the video streams so as to create a custom video stream for each client that only includes people that will be rendered by that client in order to use the available bandwidth to full capacity. In a conventional video coding approach, this video reassembling operation is only possible by decoding all incoming video streams, mixing in pixel domain and then encoding all outgoing video streams. However, this operation makes very high demands on the computational power of the MCU. In this paper, we demonstrate how in the upcoming video coding standard High Efficiency Video Coding (HEVC) the encoder can be modified to enable a reassembling operation that is HEVC compliant and works on a high syntax level in the bitstream. Hereby, no entropy en- or decoding is necessary which makes the operation very low complex.

Pages: 130 to 135

Copyright: Copyright (c) IARIA, 2013

Publication date: April 21, 2013

Published in: conference

ISSN: 2308-4448

ISBN: 978-1-61208-265-3

Location: Venice, Italy

Dates: from April 21, 2013 to April 26, 2013

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