The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 03, 2000
Filed:
Dec. 16, 1996
Motoi Tariki, Machida, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
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.