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Constant Bit-Rate (CBR) video is often preferred by broadcasters, as it allows resources to be reserved. This paper applies an adaptive channel coding scheme to CBR video. Compared to some existing schemes advantages include: the coding rate is changed according to the channel conditions; it is byte-based rather than block-based, for reduced latency; and a single retransmission allows a further attempt...
This paper demonstrates robust video streaming for IPTV over WiMAX. In the proposed method, an H.264/AVC video bit-stream is data partitioned according to data priority. Raptor channel coding is adaptively applied to the partitioned data. In the event of outright packet drops, redundant partition bearing packets serve to protect priority data. Further, to guarantee a minimum acceptable level of video...
As intelligent content management of IPTV moves popular material nearer to the end-user, application-layer channel coding schemes, involving retransmission of extra redundant data, become attractive. Application-layer, adaptive rateless channel coding is exploited in this paper's scheme to reconstruct streamed video across an IEEE 802.16e (mobile WiMAX) channel. The paper concentrates on the trade-offs...
Video streaming for IPTV is transferring to wireless mobile devices. This process poses questions of the video quality that will result and the suitability of the existing pseudo-streaming schemes for video transfer. This paper sets out the case for wireless broadband video streaming based on a simple negative acknowledgment (NACK) scheme, which for convenience is called broadband video streaming...
This paper demonstrates a robust layered video scheme, based on data-partitioning and intended for IPTV streaming over wireless broadband. Equal error protection through rateless coding is applied, whereby higher-priority data partitioned packets are protected by appropriate selection of quantization parameter and picture slicing, so as to regulate packet size. In the mobile WiMAX channel investigated,...
IPTV video services are under development for broadband networks, with final hop delivery across a wireless link. Within these networks, dedicated subchannels transport different types of traffic (video, voice, data...). This paper proposes fuzzy logic control (FLC) to allocate video streams within an IPTV subchannel subject to fluctuating available bandwidth. The method employs spatial and temporal...
The anticipated growth of IPTV makes selection of suitable congestion controllers for video-stream traffic of vital concern. Measurements of packet dispersion at the receiver provide a graded way of estimating congestion, which is particularly suited to video as it does not rely on packet loss. A closed-loop congestion controller, which dynamically adapts the bitstream output of a transcoder or video...
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