H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/34
H04N 7/00 (2006.01) H04N 7/088 (2006.01)
Patent
CA 1149053
ABSTRACT OF THE DISCLOSURE A page selection device for a videotex system in which the incoming data are arranged in blocks comprising a data group following a prefix, some of the blocks having within said group specific codes called- page headers, a page comprising the data between a page header and an end of page code, the page to be displayed being transferred to a page memory, said device compri- sing an input buffer having a capacity of at least one block, in which data are entered as they appear, an addi- tional buffer with a capacity of at least one block, in which the incoming data are only entered if a page header has been detected, a main buffer with a capacity of at least one page, in which the content of the input buffer is transferred when a page header is detected, and means for comparing the page number entered in the additional buffer with the selected number and for controlling, according to whether the comparison is positive or not, either reading of the data entered in the main buffer for transfer to said memory or resetting to zero the additio- nal and main buffers.
352522
Hernandez Charles
Marquet Jean-Francois
Robic Robic & Associes/associates
Telediffusion de France
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