首页>
外国专利>
Wavelet image coder using trellis-coded quantization
Wavelet image coder using trellis-coded quantization
展开▼
机译:使用网格编码量化的小波图像编码器
展开▼
页面导航
摘要
著录项
相似文献
摘要
A system (8) for digital processing of optical image data includes a wavelet decomposition unit (12) for decomposing an input image (10) into a plurality of frequency subbands. Each subband is then converted to a frequency domain representation, phase scrambled, and then converted back into a time domain representation in a phase scrambling unit (14). The subbands are then subject to trellis coded quantization (TCQ) in a trellis coded quantization encoding unit (16, 40) before being transmitted into a channel (28). In one embodiment, fixed rate trellis coded quantization (FRTCQ) is used in a communications system having a relatively noiseless channel.
展开▼