An efficient software implementation of the CAVLC encoder for H.264/AVC

Context Adaptive Variable-Length Coding (CAVLC) is employed by H.264/AVC for lossless encoding of quantized and predicted frames for compression gain. One of the most common methods for implementing CAVLC involves heavy reliance on look up tables (LUTs) to acquire a context adapted VLC. However the...

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Published in:Proceedings of the 2011 IEEE National Aerospace and Electronics Conference (NAECON) pp. 333 - 337
Main Authors: Hoffman, M. P., Balster, E. J., Scarpino, F., Hill, K.
Format: Conference Proceeding
Language:English
Published: IEEE 01.07.2011
Subjects:
Decoding
Encoding
Hardware
Memory management
Software
Table lookup
Vectors
ISBN:1457710404, 9781457710407
ISSN:0547-3578
Online Access:Get full text
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Abstract Context Adaptive Variable-Length Coding (CAVLC) is employed by H.264/AVC for lossless encoding of quantized and predicted frames for compression gain. One of the most common methods for implementing CAVLC involves heavy reliance on look up tables (LUTs) to acquire a context adapted VLC. However the use of multiple LUTs results in large memory requirements for an embedded design. The largest LUT is used when the CAVLC encoder encodes the non-zero coefficients, called levels. To reduce memory requirements, a method for encoding levels without LUTs is proposed. In this paper, a simple realization of CAVLC in software is investigated and implemented for verification and validation testing.
AbstractList Context Adaptive Variable-Length Coding (CAVLC) is employed by H.264/AVC for lossless encoding of quantized and predicted frames for compression gain. One of the most common methods for implementing CAVLC involves heavy reliance on look up tables (LUTs) to acquire a context adapted VLC. However the use of multiple LUTs results in large memory requirements for an embedded design. The largest LUT is used when the CAVLC encoder encodes the non-zero coefficients, called levels. To reduce memory requirements, a method for encoding levels without LUTs is proposed. In this paper, a simple realization of CAVLC in software is investigated and implemented for verification and validation testing.
Author Balster, E. J.
Scarpino, F.
Hill, K.
Hoffman, M. P.
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  organization: Sch. of Electr. & Comput. Eng., Univ. of Dayton, Dayton, OH, USA
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Snippet Context Adaptive Variable-Length Coding (CAVLC) is employed by H.264/AVC for lossless encoding of quantized and predicted frames for compression gain. One of...
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StartPage 333
SubjectTerms Decoding
Encoding
Hardware
Memory management
Software
Table lookup
Vectors
Title An efficient software implementation of the CAVLC encoder for H.264/AVC
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