Authors
Henrique S Malvar, Antti Hallapuro, Marta Karczewicz, Louis Kerofsky
Publication date
2003/7
Journal
IEEE Transactions on circuits and systems for video technology
Volume
13
Issue
7
Pages
598-603
Publisher
IEEE
Description
This paper presents an overview of the transform and quantization designs in H.264. Unlike the popular 8/spl times/8 discrete cosine transform used in previous standards, the 4/spl times/4 transforms in H.264 can be computed exactly in integer arithmetic, thus avoiding inverse transform mismatch problems. The new transforms can also be computed without multiplications, just additions and shifts, in 16-bit arithmetic, thus minimizing computational complexity, especially for low-end processors. By using short tables, the new quantization formulas use multiplications but avoid divisions.
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Scholar articles
HS Malvar, A Hallapuro, M Karczewicz, L Kerofsky - IEEE Transactions on circuits and systems for video …, 2003