Flexible Broadcasting of Scalable Video Streams to Heterogeneous Mobile Devices

Abstract

Abstract-We study the scalable video broadcasting problem in mobile TV broadcast networks, where each TV channel is encoded into a scalable video stream with multiple layers, and several TV channels are concurrently broadcast over a shared air medium to many mobile devices with heterogeneous resources. Our goal is to encapsulate and broadcast video streams encoded in scalable manner to enable heterogeneous mobile devices to render the most appropriate video substreams while achieving high energy saving and low channel switching delay. The appropriate streams depend on the device capability and the target energy consumption level. We propose two new broadcast schemes, which are flexible in the sense that they allow diverse bit rates among layers of the same stream. Such flexibility enables videos to be optimally encoded in terms of coding efficiency, and allows the coded video streams to be better matched with the capability of mobile devices. We analyze the performance of the proposed broadcast schemes. In addition, we have implemented the proposed schemes in a real mobile TV testbed to show their practicality and efficiency. Our extensive experiments confirm that the proposed schemes enable energy saving differentiation: between 75 and 95 percent were observed. Moreover, one of the schemes achieves low channel switching delays: 200 msec is possible with typical system parameters.

eWU-TV: User-Centric Energy-Efficient Digital TV Broadcast Over Wi-Fi Networks

“…A SVC based energy saving approach for digital video broadcast-handheld (DVB-H) systems was proposed in [12], and a time slicing based energy consumption study was performed in [13], [14]. In fact, DVB Next Generation broadcasting system to Handheld (DVB-NGH) [15] is an upcoming handheld evolution of the second-generation digital terrestrial TV standard DVB-T2 and has layered video coding with multiple physical layer pipes.…”

“…It is obtained by using the ratio of the time duration for which the UE's radio components are turned-off over the total time of a video transmission cycle. Device i receives upto c i SVC video layers, where 1 ≤ c i ≤ L, L is the maximum number of layers being broadcast, H is the overhead duration (typically 100 ms [12]), b is the burst size of the base layer (bits), and r j is the rate allocated to j layer (bps). r 1 is the bit-rate of the base layer (at q quantization level, t min frame rate, and s as QCIF spatial resolution).…”

User-Centric Energy-Efficient Multimedia Multicast/Broadcast Solutions: A Survey

“…User-Centric Energy-Efficient Multimedia Multicast/Broadcast Solutions: A Survey [36][37][38][39] (these solutions also target UE energy saving), FEC [40][41][42][43][44][45][46], MCS [43,47], Home TV Systems [48].…”

“…The approach in [36,37] considers the broadcasting scenario of scalable encoded video streams to enable heterogeneous receivers to render the appropriate video sub-streams. This is done to achieve high energy savings and low channel switching delays by using the layer aware time slicing (LATS) algorithm [36] or the generalized LATS (GLATS) and GLATSB (GLATS with delay bound) algorithms [37]. The authors study the energy saving for different types of UEs receiving layered SVC content.…”

Mobile video streaming in modern wireless networks

“…Traditional simulcast concurrently transmits multiple nonscalable streams of each video, which effectively reduces the number of videos that can be offered by the service provider. Recent works, e.g., [5], propose to multicast scalable video streams in order to support heterogeneous mobile receivers.…”