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http://dx.doi.org/10.5392/JKCA.2012.12.03.077

Embedded Compression Codec Algorithm for Motion Compensated Wavelet Video Coding System  

Kim, Song-Ju (광주여자대학교 보건의료공학과)
Publication Information
The Journal of the Korea Contents Association / v.12, no.3, 2012 , pp. 77-83 More about this Journal
Abstract
In this paper, a low-complexity embedded compression (EC) Codec algorithm for the wavelet video coder is applied to reduce excessive external memory requirements. The EC algorithm is used to achieve a fixed compression ratio of 50 % under the near-lossless-compression constraint. The EC technique can reduce the 50 % memory requirement for intermediate low-frequency coefficients during multiple discrete wavelet transform stages compared with direct implementation of the wavelet video encoder of this paper. Furthermore, the EC scheme based on a forward adaptive quantization and fixed length coding can save bandwidth and size of buffer between DWT and SPIHT to 50 %. Simulation results show that our EC algorithm present only PSNR degradation of 0.179 and 0.162 dB in average when the target bit-rate of the video coder are 1 and 0.5 bpp, respectively.
Keywords
Memory Size and Bandwidth Reduction; Motion Compensation; Embedded Compression Algorithm; Discrete Wavelet Transform;
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