Coded data generation or conversion – Digital code to digital code converters
Patent
1998-06-16
2000-05-16
Young, Brian
Coded data generation or conversion
Digital code to digital code converters
341 67, H03M 700, H03M 740
Patent
active
060643242
ABSTRACT:
Digital signal encoding and decoding method and apparatus are provided, by which the amount of codes for communicating the quantization width can be reduced to the utmost and the coding efficiency can be improved. In the method, at the time of encoding a digital signal, the quantization width is determined based on the amount of encoded data which have already been encoded, and information on the quantization width is not included into generated encoded data. At the time of decoding, the quantization width is determined according to the amount of encoded data which have already been received. Therefore, even if the quantization width is changed, information on the quantization width is not included in the generated encoded data and thus the amount of generated codes can be reduced.
REFERENCES:
patent: 4772946 (1988-09-01), Hammner
patent: 5706009 (1998-01-01), Kondo et al.
patent: 5831688 (1998-11-01), Yamada et al.
"Information Technology--Coding of Moving Pictures and Associated Audio for Digital Storage Media at Up to about 1.5 Mbits/s," International Standard, ISO/IEC 11172-2, Chapter 2.4.2, 1993.
Kamikura Kazuto
Sagata Atsushi
Shimizu Atsushi
Watanabe Hiroshi
Nippon Telegraph and Telephone Corporation
Wamsley Patrick
Young Brian
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