Ninad Gorey

ORCID Identifier(s)

0000-0001-6579-425X

Graduation Semester and Year

2017

Language

English

Document Type

Thesis

Degree Name

Master of Science in Electrical Engineering

Department

Electrical Engineering

First Advisor

Kamisetty R Rao

Abstract

Video transcoding is an essential tool to promote inter-operability between different video communication systems. This thesis presents a cascaded architecture for homogeneous transcoding of High Efficiency Video Coding. Cascaded Transcoding model decodes the input video sequence and follows the procedure of reference encoder, with the difference being a higher QP value. The encoder will code the sequence with the goal of achieving highest coding performance, and since the encoder is not restricted by any means, it is reasonable to assume that the coding performance is the best possible transcoding performance. H.265 is the latest video coding standard which supports encoding videos with wide range of resolutions, starting from low resolution to beyond High Definition i.e. 4k or 8k. H.265 also known as HEVC was preceded by H.264/AVC which is a very well established and widely used standard in industry and finds its applications in broadcast and multimedia telephony. HEVC achieves high coding efficiency at the cost of increased complexity and not all devices have complex hardware capable enough to process the HEVC bit stream. So, to enable HEVC content playing capabilities on heterogeneous device platforms homogeneous transcoding of HEVC is necessary. Different transcoding architectures are investigated and architecture with optimum performance is implemented and studied as part of this research. The architecture is implemented using existing reference software of H.265. Different quality metrics (PSNR, Bitrate, Bitrate Ratio, Transcoding time) are measured for the proposed scheme using different test sequences and conclusions are drawn based on these results.

Keywords

HEVC, Homogeneous transcoding, Bit rate reduction

Disciplines

Electrical and Computer Engineering | Engineering

Comments

Degree granted by The University of Texas at Arlington

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