Journal ArticleDOI
A framework for efficient progressive fine granularity scalable video coding
Feng Wu,Shipeng Li,Ya-Qin Zhang +2 more
Reads0
Chats0
TLDR
Experimental results show that the PFGS framework can improve the coding efficiency up to more than 1 dB over the FGS scheme in terms of average PSNR, yet still keeps all the original properties, such as fine granularity, bandwidth adaptation, and error recovery.Abstract:
A basic framework for efficient scalable video coding, namely progressive fine granularity scalable (PFGS) video coding is proposed. Similar to the fine granularity scalable (PGS) video coding in MPEG-4, the PFGS framework has all the features of FGS, such as fine granularity bit-rate scalability, channel adaptation, and error recovery. On the other hand, different from the PGS coding, the PFGS framework uses multiple layers of references with increasing quality to make motion prediction more accurate for improved video-coding efficiency. However, using multiple layers of references with different quality also introduces several issues. First, extra frame buffers are needed for storing the multiple reconstructed reference layers. This would increase the memory cost and computational complexity of the PFGS scheme. Based on the basic framework, a simplified and efficient PFGS framework is further proposed. The simplified PPGS framework needs only one extra frame buffer with almost the same coding efficiency as in the original framework. Second, there might be undesirable increase and fluctuation of the coefficients to be coded when switching from a low-quality reference to a high-quality one, which could partially offset the advantage of using a high-quality reference. A further improved PFGS scheme can eliminate the fluctuation of enhancement-layer coefficients when switching references by always using only one high-quality prediction reference for all enhancement layers. Experimental results show that the PFGS framework can improve the coding efficiency up to more than 1 dB over the FGS scheme in terms of average PSNR, yet still keeps all the original properties, such as fine granularity, bandwidth adaptation, and error recovery. A simple simulation of transmitting the PFGS video over a wireless channel further confirms the error robustness of the PFGS scheme, although the advantages of PFGS have not been fully exploited.read more
Citations
More filters
Journal ArticleDOI
Content-adaptive wireless streaming of instructional videos
Tiecheng Liu,Chekuri Choudary +1 more
TL;DR: A real-time content analysis method is provided to detect and extract content regions from instructional videos, then a “leaking-video-buffer” model is applied to adjust QoS of video streams dynamically based on video content.
Book ChapterDOI
Dynamic scheduling for scalable media transmission over cdma2000 1xEV-DO broadcast and multicast networks
TL;DR: A dynamic packet-scheduling algorithm that works with a retransmission scheme to enable scalable and adaptive service across cdma2000 1xEV-DO BCMCS environments and can adapt to a changing resource environment more flexibly.
Journal ArticleDOI
Motion-Compensated Scalable Video Transmission Over MIMO Wireless Channels
TL;DR: In a high Doppler environment, where it is hard to get an accurate channel estimate, the performance of the proposed MC-FGS video transmission scheme with joint control of both the leaky and partial prediction parameters, and the unequal error protection (UEP) is investigated.
Proceedings ArticleDOI
Incremental Refinement of Computation for the Discrete Wavelet Transform
TL;DR: The proposed method builds upon previous research on approximate signal processing and revisits the concept of incremental refinement of computation, since all representation accuracies are produced incrementally under a single computation of the refined input source and with no overhead in comparison to the conventional calculation approach.
Proceedings ArticleDOI
Scalable video coding by stream morphing
TL;DR: An overview of the stream morphing technique is provided along with results for the constant quantizer SNR scalable case which demonstrate good performance, especially for the class of "low motion" video sequences.
References
More filters
Journal ArticleDOI
Embedded image coding using zerotrees of wavelet coefficients
TL;DR: The embedded zerotree wavelet algorithm (EZW) is a simple, yet remarkably effective, image compression algorithm, having the property that the bits in the bit stream are generated in order of importance, yielding a fully embedded code.
Journal ArticleDOI
Error control and concealment for video communication: a review
Yao Wang,Qin-Fan Zhu +1 more
TL;DR: In this paper, a review of error control and concealment in video communication is presented, which are described in three categories according to the roles that the encoder and decoder play in the underlying approaches.
Proceedings ArticleDOI
Receiver-driven layered multicast
TL;DR: The RLM protocol is described, its performance is evaluated with a preliminary simulation study that characterizes user-perceived quality by assessing loss rates over multiple time scales, and the implementation of a software-based Internet video codec is discussed.
Journal ArticleDOI
Low-complexity video coding for receiver-driven layered multicast
TL;DR: A layered video compression algorithm which, when combined with RLM, provides a comprehensive solution for scalable multicast video transmission in heterogeneous networks.
Journal ArticleDOI
Error-resilient video coding in the ISO MPEG-4 standard
TL;DR: In this paper, error resilience aspects of the video coding techniques that are standardized in the ISO MPEC-4 standard are described, including resynchronization strategies, data partitioning, reversible variable length codes (VLCs), and header extension codes.