Digital Cinema (DC) electronic distribution requires networks with high available bandwidth. In this paper, we propose a system that adopts a frequency multiplex of DVB-T signals to deliver JPEG 2000 video over wireless channels characterized by multipath. The objective of this paper is to present a transmission scheme that, by optimizing transmission over DVB-T channel, provides content distributor and/or end users with the possibility to obtain a very high quality video stream. The source coded video is first downsampled to a video quality still at an high level, and then compressed with parameters reflecting the specifications for DC. The stream is thus split and encapsulated into MPEG-2 TS packets. A proper strategy of substream multiplexing and composition is presented, which may reduce the residual error effects and bandwidth requirements. Optionally, a Forward Error Correction layer can be applied to further enhance transmission robustness. At the receiver side a proper demultiplexing and decompression is performed. Eventually, we will also present simulated results in terms of objective video quality vs. channel SNR and multipath conditions.
Digital Cinema Delivery using Frequency Multiplexed DVB-T Signals
BARUFFA, Giuseppe;MICANTI, PAOLO;FRESCURA, Fabrizio;CACOPARDI, Saverio
2009
Abstract
Digital Cinema (DC) electronic distribution requires networks with high available bandwidth. In this paper, we propose a system that adopts a frequency multiplex of DVB-T signals to deliver JPEG 2000 video over wireless channels characterized by multipath. The objective of this paper is to present a transmission scheme that, by optimizing transmission over DVB-T channel, provides content distributor and/or end users with the possibility to obtain a very high quality video stream. The source coded video is first downsampled to a video quality still at an high level, and then compressed with parameters reflecting the specifications for DC. The stream is thus split and encapsulated into MPEG-2 TS packets. A proper strategy of substream multiplexing and composition is presented, which may reduce the residual error effects and bandwidth requirements. Optionally, a Forward Error Correction layer can be applied to further enhance transmission robustness. At the receiver side a proper demultiplexing and decompression is performed. Eventually, we will also present simulated results in terms of objective video quality vs. channel SNR and multipath conditions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
