Title :
Novel Approach to Support Multimedia Services Over DTMB System
Author :
Yang, Zhixing ; Wang, Xiaoqing ; Yang, Fang
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
In the conventional digital television terrestrial multimedia broadcasting (DTMB) systems, all the transport streams (TS) from various programs are multiplexed in the level of TS packets, which have the same interleaving, constellation mapping, channel coding, and thus the same quality of service (QoS). Moreover, due to the convolutional interleaving mode, the receivers have to be turned on all the time to obtain the designated data until all the received signals are de-interleaved. In this paper, for DTMB systems, the concept of the physical sub-channel (PSC) in time-frequency domain is proposed, and the scheme to support services with different QoS requirements is also addressed. Based on these techniques, a novel approach to support multimedia services over DTMB systems in a backward compatible manner is proposed and evaluated by computer simulations.
Keywords :
digital multimedia broadcasting; quality of service; DTMB system; TS packets; computer simulations; convolutional interleaving mode; digital television terrestrial multimedia broadcasting systems; multimedia services; physical subchannel; quality of service; time frequency domain; transport streams; Channel coding; Convolutional codes; Forward error correction; Multimedia communication; Parity check codes; Quality of service; Receivers; Backward compatibility; convolutional interleaving; digital television terrestrial multimedia broadcasting (DTMB); multimedia services; physical sub-channel (PSC);
Journal_Title :
Broadcasting, IEEE Transactions on
Conference_Location :
5/5/2011 12:00:00 AM
DOI :
10.1109/TBC.2011.2139470
