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Research on MPEG-2 to H.264/AVC Video Transcoding

Author: WangQi
Tutor: LiGuiZuo
School: Tianjin University
Course: Signal and Information Processing
Keywords: Video transcoding technology MPEG-2 H.264/AVC DCT coefficients USB2.0 Device driver
CLC: TN919.81
Type: Master's thesis
Year: 2007
Downloads: 100
Quote: 1
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Abstract


With the development of digital television and multimedia technology, the rapid development of video coding technology, a number of video coding standards have been formulated and applied to different areas. , Video transcoding technology as an important technology came into being in the field of video for sharing system hardware and software resources. Video transcoding technology is a re-treatment of compressed code stream, so that stream with the channel or the terminal to adapt to achieve the universal multimedia access. The MPEG-2 standard has been widely used in the field of consumer electronics such as digital TV and DVD, has accumulated a wealth of program resources. The recent rapid development of efficient compression coding standards -H.264/AVC with a series of more complex and effective video compression algorithm, compared with the previous coding standards, compression performance has improved significantly. Under the same image quality, the the H.264/AVC encoding stream data amount is only about 50% of the MPEG-2 encoded stream. In addition, H.264/AVC error resilience performance, easy to adapt to the network environment and the network interface and diversity. With the development of wireless video transmission and network streaming technology, there will be more video system uses highly efficient H.264/AVC standard. However, the majority of program resources are used to the MPEG-2 standard. Therefore, the MPEG-2 program resources H.264/AVC program resources has become increasingly prominent, MPEG-2 to H.264/AVC transcoding technology has also become a new research focus in the field of video technology. The subject of the MPEG-2 to H.264/AVC technology designed to provide transcoding between heterogeneous both coding standard reference algorithms and solutions. Overview of video transcoding and MPEG-2 and H.264/AVC standard key technologies based on the MPEG-2 to H.264/AVC transcoding main issues that need to be addressed, and demonstrates the MPEG-2 to convert H.264/AVC intra-and inter-frame coding scheme, transcoder, decode MPEG-2 stream DCT coefficients obtained quickly determine H.264 encoding mode key algorithm, implemented in software and verify that the proposed algorithm. The development of digital television (DTV), the test DTV devices and system performance monitoring DTV devices and the system is running, maintenance, display DTV devices are required to provide a DTV transport stream (TS), while the storage or analysis need to interception TS stream. To meet this demand, the research group has been working on the basis of development of USB 2.0 digital TV stream transmission / interception module. The second part of this paper summarizes the completion of the module host software development work, including the development and implementation of the USB device driver under Windows and Linux systems and the application of control procedures.

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