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Method for image coding by rate-distortion adaptive zerotreebasedresidual vector quantization and system for effecting same
U.S. Patent 7,602,982B2
  • Scott E. Budge, Utah State University
  • Q. Gu
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Methods and systems for encoding, transmitting and decoding digital images by rate-distortion adaptive zerotree-based residual vector quantization are disclosed. A method of the invention includes receiving a digital image, transforming the digital image into the wavelet domain generating a pyramid hierarchy, losslessly encoding a top LL subband from the pyramid hierarchy, encoding other subbands by vector quantization based on a zerotree insignificance prediction, generating an encoded image from the lossless encoding and vector quantization encoding, transmitting the encoded image along a communications channel, receiving the encoded image transmitted along the communications channel, reconstructing a zerotree from the encoded image, vector quantization decoding subbands from the encoded image other than a top LL subband, losslessly decoding the top LL subband from the encoded image, reverse wavelet transforming the top LL subband and the vector quantization decoded subbands and outputting a decoded image

Citation Information
S. E. Budge and Q. Gu, “Method for image coding by rate-distortion adaptive zerotreebased residual vector quantization and system for effecting same,” U.S. Patent 7,602,982 B2, Oct. 13, 2009.