Abstract
AbstractThis article proposes a novel scheme, based on unequal error protected rateless codes, for broadcasting layered multimedia over cooperative multiple-input multiple-output (MIMO). By taking advantage of both cooperation and broadcasting, we first present a two-phase cooperative MIMO broadcast scheme, which exploits distributed diversity in point-to-multipoint communication scenarios. Then, to enhance layered multimedia transmission with progressive recovery, the progressive rateless codes (PRC) is proposed to recover the layered data according to their importance at the expected received ratio of all output packets. Thus, receivers with different packet loss rate can achieve an adaptive recovery of the layered multimedia progressively. Furthermore, based on PRC, a distortion-based layered multimedia broadcast problem is formulated, which optimizes source bitrate of the layered multimedia and coding rates of PRC to improve the quality of experience (QoE) of the multimedia delivery over all receivers. The performance analysis including both analytical results and simulation experiments of Motion-JPEG 2000 broadcast to receivers verifies the superiority of the cooperative broadcast and efficiency of the QoE-driven optimization algorithm.
Highlights
Broadcast, as the nature of the wireless medium, offers the promise of overcoming the bandwidth and energy limitation by using one channel to transmit source data to all destinations simultaneously within transmission range [1]
As the state-ofthe-art multimedia source compression standard, scalable video coding (SVC) extension of the H.264/AVC Standard [8] and Joint Photographic Experts Group 2000 (JPEG 2000) [9] are both pervasive in broadcast network since they are capable of providing efficient video and image information content to the users
Beyond the proposed progressive rateless codes (PRC), unequal error protected broadcast scheme is established with the purpose that different users can receive broadcasting images/videos with different decoding layers according to their channel qualities
Summary
As the nature of the wireless medium, offers the promise of overcoming the bandwidth and energy limitation by using one channel to transmit source data to all destinations simultaneously within transmission range [1]. As an efficient way to mitigating the fading arising from multipath propagation, has successfully been extended to relay channels by using distributed relay terminals, referred to as cooperative diversity [2] In contrast with such conventional systems which have only one single destination node and a relatively small number of potential relay nodes, cooperative broadcast (CB) [3] has been proposed for multiple destinations to. For layered multimedia broadcast over cooperative MIMO, progressive rateless codes (PRC) is proposed to apply UEP to the broadcast of MotionJPEG 2000 encoding layered video stream,a with high efficiency and low complexity. Beyond the proposed PRC, unequal error protected broadcast scheme is established with the purpose that different users can receive broadcasting images/videos with different decoding layers according to their channel qualities.
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