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Encoding DCT Coefficients Based on Rate–Distortion Measurement

✍ Scribed by I-Ming Pao; Ming-Ting Sun; Shawmin Lei

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
179 KB
Volume
12
Category
Article
ISSN
1047-3203

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✦ Synopsis

We propose a rate-distortion optimization algorithm that selects the quantization parameter and adjusts the level of the quantized DCT coefficients based on a ratedistortion measurement to achieve better video quality under a bit-rate constraint. The bit streams generated by the algorithm conform to the standards. The results show that the algorithm can achieve up to about 2.5-dB peak signal-to-noise ratio improvement compared to H.263+ TMN8 at the same bit rate.

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