@article{oai:nagoya.repo.nii.ac.jp:00006149,
 author = {Yamazato, Takaya and Makido, Satoshi and Katayama, Masaaki and Ogawa, Akira},
 journal = {IEEE Global Telecommunications Conference - The Bridge to Global Integration -},
 month = {Nov},
 note = {For transmission of video signals, it is important that system allows certain degree of flexibility in bit rate as well as quality depending upon a requirement of media and channel conditions. In this paper, we discuss a hierarchical transmission of Huffman code using multi-code/multi-rate DS/SS system to realize flexible transmission. We first discuss and show that structure of Huffman code tree directly expresses hierarchical structure and parallel transmission of Huffman code can achieve hierarchical transmission. By assigning different transmission data rate,  it is possible to transmit different amount of transmitted information from each of stratum. Further, we show a quality of each of stratum can easily controlled by an appropriate power distribution to each parallel transmission branch.},
 title = {Hierarchical Transmission System using Multi-code/Multi-rate DS/SS Modulation},
 year = {1998}
}