Periodic entropy coder initialization for wavefront decoding of video bitstream

In this paper, we outline a coding strategy that initializes the entropy coding engine of a video codec at pre-defined locations within a bit-stream. Coupled with the causal dependencies of state-of-the-art video coding systems, this enables wavefront processing of the entropy decoding and reconstru...

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Vydáno v:2011 18th IEEE International Conference on Image Processing s. 3517 - 3520
Hlavní autoři: Misra, Kiran, Zhao, Jie, Segall, Andrew
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: IEEE 01.09.2011
Témata:
Bit rate
Context
Decoding
Engines
Entropy
Entropy coding
Video coding
Wavefront Decoding
ISBN:1457713047, 9781457713040
ISSN:1522-4880
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Shrnutí:In this paper, we outline a coding strategy that initializes the entropy coding engine of a video codec at pre-defined locations within a bit-stream. Coupled with the causal dependencies of state-of-the-art video coding systems, this enables wavefront processing of the entropy decoding and reconstruction process simultaneously. Approaches to wavefront processing have been considered by others, and those methods either address the reconstruction process solely or require transmitting image data in non-raster scan order. Here, our key contribution is that we enable simultaneous entropy/reconstruction wavefront processing while still preserving a raster scan strategy. In this paper, we describe the system, as well as different strategies for initializing the context models. The performance of the proposed methods is evaluated, and the bitrate increase is shown to be nominal.
ISBN:1457713047
9781457713040
ISSN:1522-4880
DOI:10.1109/ICIP.2011.6116474