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Research and Design of Wyner-Ziv to AVS Video Transcoder

Author: YiAiGuo
Tutor: GaoWen
School: Harbin Institute of Technology
Course: Computer Science and Technology
Keywords: Wyner-Ziv coding AVS encoder Transcoding
CLC: TN919.81
Type: Master's thesis
Year: 2010
Downloads: 22
Quote: 0
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Abstract


AVS1-P2 is the Chinese audio-video coding standard (the AVS) Working Group released the latest video coding standard. It uses a motion-compensated hybrid coding framework , in this framework , both intra prediction and inter prediction complete the encoding side , used to eliminate the space and time correlation. As predictive coding using motion estimation (ME), this is a complex process of calculation , the video encoder is typically less than the decoder complexity . This architecture is suitable for the following applications , such as radio, video on demand. They all have a common characteristic , video sequences encoding only once, and decoding times. Today, however, some emerging applications , such as wireless video surveillance, low-power video sensor networks and mobile camera phones , have limited resources and computing power , they can not afford a sophisticated encoder. Distributed Video Coding (DVC) as a new coding method can be intra-coded and inter- decoding , so that the complexity is transferred from the encoder to the decoder side . It is a promising technology for the mobile multimedia devices , such as wireless video phone camera and sensor networks compressed video signal source for step . AVS is ideal for a low decoding complexity of applications, while DVC for applications requiring low encoding complexity applications . However, in some applications , the encoding side and decoding side need both low complexity , in this case , AVS and DVC not apply. One solution is to use a flow from the Wyner-Ziv stream AVS codec . In this paper , our goal is to take two long , which made a quick Wyner-Ziv to AVS transcoding system . Codecs are designed primarily to reduce encoding complexity of AVS . Taking into account the mode decision is a very time-consuming operation , we will remove off mode decision , which uses schema mapping and motion vector extraction and other methods to accelerate the AVS motion estimation . Experimental results show that compared to the reference transcoder , our proposed transcoder AVS can effectively reduce the complexity of the encoder , while the transcoded video quality is not significantly reduced.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Image communication, multimedia communication > Image coding
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