Multiplex communications – Channel assignment techniques – Combining or distributing information via code word channels...
Patent
1996-12-16
2000-10-03
Holloway, III, Edwin C.
Multiplex communications
Channel assignment techniques
Combining or distributing information via code word channels...
375200, 370342, H04J 1302
Patent
active
061283096
ABSTRACT:
A communication apparatus is disclosed which allocates the respective bits indicating multilevel image data to different spread codes, and then spreads the bits by the use of the spread codes, thereby achieving code division multiplex communication. Image data consisting of 8 bits is transmitted and received at one time by the use of 8 or greater number of spreads codes. In the transmitting end, the amounts of the 8-bit luminance data and the 8-bit color difference data are halved along the time axis, and the resulting respective data are line-sequential multiplexed. Thus, among 12 fields, one field is transmitted according to the above-described code division multiplex method. In the receiving end, the receiving signal which has been code division multiplexed in the transmitting end is demodulated by de-spreading using a plurality of spread codes. The de-spread signal is stored in a memory and image data for one field is repeatedly read from the memory during 12 fields. Then, the luminance signal and the color difference signal are line-sequential separated from the read image data and are output.
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Canon Kabushiki Kaisha
Holloway III Edwin C.
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