Journal ArticleDOI
Hyper-Trellis Decoding of Pixel-Domain Wyner–Ziv Video Coding
Reads0
Chats0
TLDR
A new decoding algorithm based on decoding on a hyper-trellis, in which multiple states of the original code trellis are combined, which significantly improves performance without changing the complexity of the decoder.Abstract:
In this paper, we present a new decoding algorithm for the Wyner-Ziv (WZ) video coding scheme based on turbo codes. In this scheme, a video frame is encoded using a turbo code, and only a subset of the parity bits are sent to the decoder. At the decoder, the temporal correlation of the video sequence is exploited by using the previous frame as noisy side information (SI) for the current frame. However, there is a mismatch between the SI, which is available as pixel values, and the binary code bits. Previous implementations of the decoder use suboptimal approaches that convert pixel values to soft information for code bits. We present a new decoding algorithm for this application based on decoding on a hyper-trellis, in which multiple states of the original code trellis are combined. We show that this approach significantly improves performance without changing the complexity of the decoder. We also introduce a new technique for the WZ decoder to exploit the spatial correlation within a frame without requiring transform-domain encoding at the encoder, thereby reducing its complexity. Simulation results for fixed-rate transmission show a 9-10-dB improvement in the peak signal-to-noise ratio when compared to a WZ video codec that does bitwise decoding and utilizes only the temporal correlation.read more
Citations
More filters
Proceedings ArticleDOI
A comparison of the error resiliency of bit-plane based and symbol based pixel-domain distributed video coding
TL;DR: Experimental results show that symbol based coding outperforms bit-plane based coding by up to 0.7 dB in PSNR of the decoded video.
Wyner-Ziv Bayer-pattern video coding
TL;DR: A new color space transform method is proposed specifically for Bayer-pattern video and combined with Wyner-Ziv video coding, so that the encoding complexity can be significantly reduced and this system supports low complexity video encoding and error resilient video transmission.
Proceedings ArticleDOI
Witsenhausen-Wyner video coding
TL;DR: This paper replaces the predictive Inter coding in H.264/AVC by the syndrome-based coding scheme of Wistenhausen and Wyner, while keeping the Intra and Skip modes unchanged.
References
More filters
Book
Elements of information theory
Thomas M. Cover,Joy A. Thomas +1 more
TL;DR: The author examines the role of entropy, inequality, and randomness in the design of codes and the construction of codes in the rapidly changing environment.
Book
Introduction to Algorithms
TL;DR: The updated new edition of the classic Introduction to Algorithms is intended primarily for use in undergraduate or graduate courses in algorithms or data structures and presents a rich variety of algorithms and covers them in considerable depth while making their design and analysis accessible to all levels of readers.
Digital communications
TL;DR: This month's guest columnist, Steve Bible, N7HPR, is completing a master’s degree in computer science at the Naval Postgraduate School in Monterey, California, and his research area closely follows his interest in amateur radio.